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-;;; magit-git.el --- Git functionality  -*- lexical-binding: t -*-
-
-;; Copyright (C) 2010-2018  The Magit Project Contributors
-;;
-;; You should have received a copy of the AUTHORS.md file which
-;; lists all contributors.  If not, see http://magit.vc/authors.
-
-;; Author: Jonas Bernoulli <jonas@bernoul.li>
-;; Maintainer: Jonas Bernoulli <jonas@bernoul.li>
-
-;; Magit is free software; you can redistribute it and/or modify it
-;; under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 3, or (at your option)
-;; any later version.
-;;
-;; Magit is distributed in the hope that it will be useful, but WITHOUT
-;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
-;; License for more details.
-;;
-;; You should have received a copy of the GNU General Public License
-;; along with Magit.  If not, see http://www.gnu.org/licenses.
-
-;;; Commentary:
-
-;; This library implements wrappers for various Git plumbing commands.
-
-;;; Code:
-
-(require 'cl-lib)
-(require 'dash)
-
-(require 'magit-popup)
-(require 'magit-utils)
-(require 'magit-section)
-
-(declare-function magit-call-git "magit-process" (&rest args))
-(declare-function magit-maybe-make-margin-overlay "magit-margin" ())
-(declare-function magit-process-buffer "magit-process" (&optional nodisplay))
-(declare-function magit-process-file "magit-process" (&rest args))
-(declare-function magit-process-insert-section "magit-process"
-                  (pwe program args &optional errcode errlog))
-(declare-function magit-refresh "magit-mode" ())
-(defvar magit-process-error-message-regexps)
-(defvar magit-refresh-args) ; from `magit-mode' for `magit-current-file'
-(defvar magit-branch-prefer-remote-upstream)
-(defvar magit-published-branches)
-(defvar magit-diff-section-arguments)
-
-(defvar magit-tramp-process-environment nil)
-
-;;; Options
-
-;; For now this is shared between `magit-process' and `magit-git'.
-(defgroup magit-process nil
-  "Git and other external processes used by Magit."
-  :group 'magit)
-
-(defvar magit-git-environment
-  (list (format "INSIDE_EMACS=%s,magit" emacs-version))
-  "Prepended to `process-environment' while running git.")
-
-(defcustom magit-git-output-coding-system
-  (and (eq system-type 'windows-nt) 'utf-8)
-  "Coding system for receiving output from Git.
-
-If non-nil, the Git config value `i18n.logOutputEncoding' should
-be set via `magit-git-global-arguments' to value consistent with
-this."
-  :package-version '(magit . "2.9.0")
-  :group 'magit-process
-  :type '(choice (coding-system :tag "Coding system to decode Git output")
-                 (const :tag "Use system default" nil)))
-
-(defvar magit-git-w32-path-hack nil
-  "Alist of (EXE . (PATHENTRY)).
-This specifies what additional PATH setting needs to be added to
-the environment in order to run the non-wrapper git executables
-successfully.")
-
-(defcustom magit-git-executable
-  ;; Git might be installed in a different location on a remote, so
-  ;; it is better not to use the full path to the executable, except
-  ;; on Window were we would otherwise end up using one one of the
-  ;; wrappers "cmd/git.exe" or "cmd/git.cmd", which are much slower
-  ;; than using "bin/git.exe" directly.
-  (or (and (eq system-type 'windows-nt)
-           (--when-let (executable-find "git")
-             (ignore-errors
-               ;; Git for Windows 2.x provides cygpath so we can
-               ;; ask it for native paths.
-               (let* ((core-exe
-                       (car
-                        (process-lines
-                         it "-c"
-                         "alias.X=!x() { which \"$1\" | cygpath -mf -; }; x"
-                         "X" "git")))
-                      (hack-entry (assoc core-exe magit-git-w32-path-hack))
-                      ;; Running the libexec/git-core executable
-                      ;; requires some extra PATH entries.
-                      (path-hack
-                       (list (concat "PATH="
-                                     (car (process-lines
-                                           it "-c"
-                                           "alias.P=!cygpath -wp \"$PATH\""
-                                           "P"))))))
-                 ;; The defcustom STANDARD expression can be
-                 ;; evaluated many times, so make sure it is
-                 ;; idempotent.
-                 (if hack-entry
-                     (setcdr hack-entry path-hack)
-                   (push (cons core-exe path-hack) magit-git-w32-path-hack))
-                 core-exe))))
-      "git")
-  "The Git executable used by Magit."
-  :group 'magit-process
-  :type 'string)
-
-(defcustom magit-git-global-arguments
-  `("--no-pager" "--literal-pathspecs" "-c" "core.preloadindex=true"
-    "-c" "log.showSignature=false"
-    ,@(and (eq system-type 'windows-nt)
-           (list "-c" "i18n.logOutputEncoding=UTF-8")))
-  "Global Git arguments.
-
-The arguments set here are used every time the git executable is
-run as a subprocess.  They are placed right after the executable
-itself and before the git command - as in `git HERE... COMMAND
-REST'.  See the manpage `git(1)' for valid arguments.
-
-Be careful what you add here, especially if you are using Tramp
-to connect to servers with ancient Git versions.  Never remove
-anything that is part of the default value, unless you really
-know what you are doing.  And think very hard before adding
-something; it will be used every time Magit runs Git for any
-purpose."
-  :package-version '(magit . "2.9.0")
-  :group 'magit-git-arguments
-  :group 'magit-process
-  :type '(repeat string))
-
-(defvar magit-git-debug nil
-  "Whether to enable additional reporting of git errors.
-
-Magit basically calls git for one of these two reasons: for
-side-effects or to do something with its standard output.
-
-When git is run for side-effects then its output, including error
-messages, go into the process buffer which is shown when using \
-\\<magit-status-mode-map>\\[magit-process].
-
-When git's output is consumed in some way, then it would be too
-expensive to also insert it into this buffer, but when this
-option is non-nil and git returns with a non-zero exit status,
-then at least its standard error is inserted into this buffer.
-
-This is only intended for debugging purposes.  Do not enable this
-permanently, that would negatively affect performance.")
-
-
-(defcustom magit-prefer-remote-upstream nil
-  "Whether to favor remote branches when reading the upstream branch.
-
-This controls whether commands that read a branch from the user
-and then set it as the upstream branch, offer a local or a remote
-branch as default completion candidate, when they have the choice.
-
-This affects all commands that use `magit-read-upstream-branch'
-or `magit-read-starting-point', which includes all commands that
-change the upstream and many which create new branches."
-  :package-version '(magit . "2.4.2")
-  :group 'magit-commands
-  :type 'boolean)
-
-(defcustom magit-list-refs-sortby nil
-  "How to sort the ref collection in the prompt.
-
-This affects commands that read a ref.  More specifically, it
-controls the order of refs returned by `magit-list-refs', which
-is called by functions like `magit-list-branch-names' to generate
-the collection of refs.  By default, refs are sorted according to
-their full refname (i.e., 'refs/...').
-
-Any value accepted by the `--sort' flag of `git for-each-ref' can
-be used.  For example, \"-creatordate\" places refs with more
-recent committer or tagger dates earlier in the list.  A list of
-strings can also be given in order to pass multiple sort keys to
-`git for-each-ref'.
-
-Note that, depending on the completion framework you use, this
-may not be sufficient to change the order in which the refs are
-displayed.  It only controls the order of the collection passed
-to `magit-completing-read' or, for commands that support reading
-multiple strings, `read-from-minibuffer'.  The completion
-framework ultimately determines how the collection is displayed."
-  :package-version '(magit . "2.11.0")
-  :group 'magit-miscellanous
-  :type '(choice string (repeat string)))
-
-;;; Git
-
-(defvar magit--refresh-cache nil)
-
-(defmacro magit--with-refresh-cache (key &rest body)
-  (declare (indent 1) (debug (form body)))
-  (let ((k (cl-gensym)))
-    `(if magit--refresh-cache
-         (let ((,k ,key))
-           (--if-let (assoc ,k (cdr magit--refresh-cache))
-               (progn (cl-incf (caar magit--refresh-cache))
-                      (cdr it))
-             (cl-incf (cdar magit--refresh-cache))
-             (let ((value ,(macroexp-progn body)))
-               (push (cons ,k value)
-                     (cdr magit--refresh-cache))
-               value)))
-       ,@body)))
-
-(defmacro magit-with-editor (&rest body)
-  "Like `with-editor' but let-bind some more variables."
-  (declare (indent 0) (debug (body)))
-  `(let ((magit-process-popup-time -1)
-         ;; The user may have customized `shell-file-name' to
-         ;; something which results in `w32-shell-dos-semantics' nil
-         ;; (which changes the quoting style used by
-         ;; `shell-quote-argument'), but Git for Windows expects shell
-         ;; quoting in the dos style.
-         (shell-file-name (if (and (eq system-type 'windows-nt)
-                                   ;; If we have Cygwin mount points,
-                                   ;; the git flavor is cygwin, so dos
-                                   ;; shell quoting is probably wrong.
-                                   (not magit-cygwin-mount-points))
-                              "cmdproxy"
-                            shell-file-name)))
-     (with-editor "GIT_EDITOR"
-       ,@body)))
-
-(defun magit-process-git-arguments (args)
-  "Prepare ARGS for a function that invokes Git.
-
-Magit has many specialized functions for running Git; they all
-pass arguments through this function before handing them to Git,
-to do the following.
-
-* Flatten ARGS, removing nil arguments.
-* Prepend `magit-git-global-arguments' to ARGS.
-* On w32 systems, encode to `w32-ansi-code-page'."
-  (setq args (append magit-git-global-arguments (-flatten args)))
-  (if (and (eq system-type 'windows-nt) (boundp 'w32-ansi-code-page))
-      ;; On w32, the process arguments *must* be encoded in the
-      ;; current code-page (see #3250).
-      (mapcar (lambda (arg)
-                (encode-coding-string
-                 arg (intern (format "cp%d" w32-ansi-code-page))))
-              args)
-    args))
-
-(defun magit-git-exit-code (&rest args)
-  "Execute Git with ARGS, returning its exit code."
-  (apply #'magit-process-file magit-git-executable nil nil nil
-         (magit-process-git-arguments args)))
-
-(defun magit-git-success (&rest args)
-  "Execute Git with ARGS, returning t if its exit code is 0."
-  (= (magit-git-exit-code args) 0))
-
-(defun magit-git-failure (&rest args)
-  "Execute Git with ARGS, returning t if its exit code is 1."
-  (= (magit-git-exit-code args) 1))
-
-(defun magit-git-str (&rest args)
-  "Execute Git with ARGS, returning the first line of its output.
-If there is no output, return nil.  If the output begins with a
-newline, return an empty string.  Like `magit-git-string' but
-ignore `magit-git-debug'."
-  (setq args (-flatten args))
-  (magit--with-refresh-cache (cons default-directory args)
-    (with-temp-buffer
-      (apply #'magit-process-file magit-git-executable nil (list t nil) nil
-             (magit-process-git-arguments args))
-      (unless (bobp)
-        (goto-char (point-min))
-        (buffer-substring-no-properties (point) (line-end-position))))))
-
-(defun magit-git-output (&rest args)
-  "Execute Git with ARGS, returning its output."
-  (setq args (-flatten args))
-  (magit--with-refresh-cache (cons default-directory args)
-    (with-temp-buffer
-      (apply #'magit-process-file magit-git-executable nil (list t nil) nil
-             (magit-process-git-arguments args))
-      (buffer-substring-no-properties (point-min) (point-max)))))
-
-(define-error 'magit-invalid-git-boolean "Not a Git boolean")
-
-(defun magit-git-true (&rest args)
-  "Execute Git with ARGS, returning t if it prints \"true\".
-If it prints \"false\", then return nil.  For any other output
-signal `magit-invalid-git-boolean'."
-  (pcase (magit-git-output args)
-    ((or "true"  "true\n")  t)
-    ((or "false" "false\n") nil)
-    (output (signal 'magit-invalid-git-boolean output))))
-
-(defun magit-git-false (&rest args)
-  "Execute Git with ARGS, returning t if it prints \"false\".
-If it prints \"true\", then return nil.  For any other output
-signal `magit-invalid-git-boolean'."
-  (pcase (magit-git-output args)
-    ((or "true"  "true\n")  nil)
-    ((or "false" "false\n") t)
-    (output (signal 'magit-invalid-git-boolean output))))
-
-(defun magit-git-insert (&rest args)
-  "Execute Git with ARGS, inserting its output at point.
-If Git exits with a non-zero exit status, then show a message and
-add a section in the respective process buffer."
-  (setq args (magit-process-git-arguments args))
-  (if magit-git-debug
-      (let (log)
-        (unwind-protect
-            (progn
-              (setq log (make-temp-file "magit-stderr"))
-              (delete-file log)
-              (let ((exit (apply #'magit-process-file magit-git-executable
-                                 nil (list t log) nil args)))
-                (when (> exit 0)
-                  (let ((msg "Git failed"))
-                    (when (file-exists-p log)
-                      (setq msg (with-temp-buffer
-                                  (insert-file-contents log)
-                                  (goto-char (point-max))
-                                  (cond
-                                   ((functionp magit-git-debug)
-                                    (funcall magit-git-debug (buffer-string)))
-                                   ((run-hook-wrapped
-                                     'magit-process-error-message-regexps
-                                     (lambda (re) (re-search-backward re nil t)))
-                                    (match-string-no-properties 1)))))
-                      (let ((magit-git-debug nil))
-                        (with-current-buffer (magit-process-buffer t)
-                          (magit-process-insert-section default-directory
-                                                        magit-git-executable
-                                                        args exit log))))
-                    (message "%s" msg)))
-                exit))
-          (ignore-errors (delete-file log))))
-    (apply #'magit-process-file magit-git-executable
-           nil (list t nil) nil args)))
-
-(defun magit-git-string (&rest args)
-  "Execute Git with ARGS, returning the first line of its output.
-If there is no output, return nil.  If the output begins with a
-newline, return an empty string."
-  (setq args (-flatten args))
-  (magit--with-refresh-cache (cons default-directory args)
-    (with-temp-buffer
-      (apply #'magit-git-insert args)
-      (unless (bobp)
-        (goto-char (point-min))
-        (buffer-substring-no-properties (point) (line-end-position))))))
-
-(defun magit-git-lines (&rest args)
-  "Execute Git with ARGS, returning its output as a list of lines.
-Empty lines anywhere in the output are omitted.
-
-If Git exits with a non-zero exit status, then report show a
-message and add a section in the respective process buffer."
-  (with-temp-buffer
-    (apply #'magit-git-insert args)
-    (split-string (buffer-string) "\n" t)))
-
-(defun magit-git-items (&rest args)
-  "Execute Git with ARGS, returning its null-separated output as a list.
-Empty items anywhere in the output are omitted.
-
-If Git exits with a non-zero exit status, then report show a
-message and add a section in the respective process buffer."
-  (with-temp-buffer
-    (apply #'magit-git-insert args)
-    (split-string (buffer-string) "\0" t)))
-
-(defun magit-git-wash (washer &rest args)
-  "Execute Git with ARGS, inserting washed output at point.
-Actually first insert the raw output at point.  If there is no
-output, call `magit-cancel-section'.  Otherwise temporarily narrow
-the buffer to the inserted text, move to its beginning, and then
-call function WASHER with ARGS as its sole argument."
-  (declare (indent 1))
-  (let ((beg (point)))
-    (setq args (-flatten args))
-    (magit-git-insert args)
-    (if (= (point) beg)
-        (magit-cancel-section)
-      (unless (bolp)
-        (insert "\n"))
-      (save-restriction
-        (narrow-to-region beg (point))
-        (goto-char beg)
-        (funcall washer args))
-      (when (or (= (point) beg)
-                (= (point) (1+ beg)))
-        (magit-cancel-section))
-      (magit-maybe-make-margin-overlay))))
-
-(defun magit-git-version (&optional raw)
-  (--when-let (let (magit-git-global-arguments)
-                (ignore-errors (substring (magit-git-string "version") 12)))
-    (if raw it (and (string-match "^\\([0-9]+\\.[0-9]+\\.[0-9]+\\)" it)
-                    (match-string 1 it)))))
-
-;;; Files
-
-(defun magit--safe-default-directory (&optional file)
-  (catch 'unsafe-default-dir
-    (let ((dir (file-name-as-directory
-                (expand-file-name (or file default-directory))))
-          (previous nil))
-      (while (not (magit-file-accessible-directory-p dir))
-        (setq dir (file-name-directory (directory-file-name dir)))
-        (when (equal dir previous)
-          (throw 'unsafe-default-dir nil))
-        (setq previous dir))
-      dir)))
-
-(defmacro magit--with-safe-default-directory (file &rest body)
-  (declare (indent 1) (debug (form body)))
-  `(when-let ((default-directory (magit--safe-default-directory ,file)))
-     ,@body))
-
-(defun magit-git-dir (&optional path)
-  "Return absolute path to the control directory of the current repository.
-
-All symlinks are followed.  If optional PATH is non-nil, then
-it has to be a path relative to the control directory and its
-absolute path is returned."
-  (magit--with-refresh-cache (list default-directory 'magit-git-dir path)
-    (magit--with-safe-default-directory nil
-      (when-let ((dir (magit-rev-parse-safe "--git-dir")))
-        (setq dir (file-name-as-directory (magit-expand-git-file-name dir)))
-        (unless (file-remote-p dir)
-          (setq dir (concat (file-remote-p default-directory) dir)))
-        (if path (expand-file-name (convert-standard-filename path) dir) dir)))))
-
-(defvar magit--separated-gitdirs nil)
-
-(defun magit--record-separated-gitdir ()
-  (let ((topdir (magit-toplevel))
-        (gitdir (magit-git-dir)))
-    ;; We want to delete the entry for `topdir' here, rather than within
-    ;; (unless ...), in case a `--separate-git-dir' repository was switched to
-    ;; the standard structure (i.e., "topdir/.git/").
-    (setq magit--separated-gitdirs (cl-delete topdir
-                                            magit--separated-gitdirs
-                                            :key #'car :test #'equal))
-    (unless (equal (file-name-as-directory (expand-file-name ".git" topdir))
-                   gitdir)
-      (push (cons topdir gitdir) magit--separated-gitdirs))))
-
-(defun magit-toplevel (&optional directory)
-  "Return the absolute path to the toplevel of the current repository.
-
-From within the working tree or control directory of a repository
-return the absolute path to the toplevel directory of the working
-tree.  As a special case, from within a bare repository return
-the control directory instead.  When called outside a repository
-then return nil.
-
-When optional DIRECTORY is non-nil then return the toplevel for
-that directory instead of the one for `default-directory'.
-
-Try to respect the option `find-file-visit-truename', i.e.  when
-the value of that option is nil, then avoid needlessly returning
-the truename.  When a symlink to a sub-directory of the working
-tree is involved, or when called from within a sub-directory of
-the gitdir or from the toplevel of a gitdir, which itself is not
-located within the working tree, then it is not possible to avoid
-returning the truename."
-  (magit--with-refresh-cache
-      (cons (or directory default-directory) 'magit-toplevel)
-    (magit--with-safe-default-directory directory
-      (if-let ((topdir (magit-rev-parse-safe "--show-toplevel")))
-          (let (updir)
-            (setq topdir (magit-expand-git-file-name topdir))
-            (if (and
-                 ;; Always honor these settings.
-                 (not find-file-visit-truename)
-                 (not (getenv "GIT_WORK_TREE"))
-                 ;; `--show-cdup' is the relative path to the toplevel
-                 ;; from `(file-truename default-directory)'.  Here we
-                 ;; pretend it is relative to `default-directory', and
-                 ;; go to that directory.  Then we check whether
-                 ;; `--show-toplevel' still returns the same value and
-                 ;; whether `--show-cdup' now is the empty string.  If
-                 ;; both is the case, then we are at the toplevel of
-                 ;; the same working tree, but also avoided needlessly
-                 ;; following any symlinks.
-                 (progn
-                   (setq updir (file-name-as-directory
-                                (magit-rev-parse-safe "--show-cdup")))
-                   (setq updir (if (file-name-absolute-p updir)
-                                   (concat (file-remote-p default-directory) updir)
-                                 (expand-file-name updir)))
-                   (let ((default-directory updir))
-                     (and (string-equal (magit-rev-parse-safe "--show-cdup") "")
-                          (--when-let (magit-rev-parse-safe "--show-toplevel")
-                            (string-equal (magit-expand-git-file-name it)
-                                          topdir))))))
-                updir
-              (concat (file-remote-p default-directory)
-                      (file-name-as-directory topdir))))
-        (when-let ((gitdir (magit-rev-parse-safe "--git-dir")))
-          (setq gitdir (file-name-as-directory
-                        (if (file-name-absolute-p gitdir)
-                            ;; We might have followed a symlink.
-                            (concat (file-remote-p default-directory)
-                                    (magit-expand-git-file-name gitdir))
-                          (expand-file-name gitdir))))
-          (if (magit-bare-repo-p)
-              gitdir
-            (let* ((link (expand-file-name "gitdir" gitdir))
-                   (wtree (and (file-exists-p link)
-                               (magit-file-line link))))
-              (cond
-               ((and wtree
-                     ;; Ignore .git/gitdir files that result from a
-                     ;; Git bug.  See #2364.
-                     (not (equal wtree ".git")))
-                ;; Return the linked working tree.
-                (file-name-directory wtree))
-               ;; The working directory may not be the parent directory of
-               ;; .git if it was set up with `git init --separate-git-dir'.
-               ;; See #2955.
-               ((car (rassoc gitdir magit--separated-gitdirs)))
-               (t
-                ;; Step outside the control directory to enter the working tree.
-                (file-name-directory (directory-file-name gitdir)))))))))))
-
-(defmacro magit-with-toplevel (&rest body)
-  (declare (indent defun) (debug (body)))
-  (let ((toplevel (cl-gensym "toplevel")))
-    `(let ((,toplevel (magit-toplevel)))
-       (if ,toplevel
-           (let ((default-directory ,toplevel))
-             ,@body)
-         (magit--not-inside-repository-error)))))
-
-(define-error 'magit-outside-git-repo "Not inside Git repository")
-(define-error 'magit-git-executable-not-found
-  "Git executable cannot be found (see https://magit.vc/goto/e6a78ed2)")
-
-(defun magit--not-inside-repository-error ()
-  (if (executable-find magit-git-executable)
-      (signal 'magit-outside-git-repo default-directory)
-    (signal 'magit-git-executable-not-found magit-git-executable)))
-
-(defun magit-inside-gitdir-p (&optioal noerror)
-  "Return t if `default-directory' is below the repository directory.
-If it is below the working directory, then return nil.
-If it isn't below either, then signal an error unless NOERROR
-is non-nil, in which case return nil."
-  (and (magit--assert-default-directory noerror)
-       ;; Below a repository directory that is not located below the
-       ;; working directory "git rev-parse --is-inside-git-dir" prints
-       ;; "false", which is wrong.
-       (let ((gitdir (magit-git-dir)))
-         (cond (gitdir (file-in-directory-p default-directory gitdir))
-               (noerror nil)
-               (t (signal 'magit-outside-git-repo default-directory))))))
-
-(defun magit-inside-worktree-p (&optional noerror)
-  "Return t if `default-directory' is below the working directory.
-If it is below the repository directory, then return nil.
-If it isn't below either, then signal an error unless NOERROR
-is non-nil, in which case return nil."
-  (and (magit--assert-default-directory noerror)
-       (condition-case nil
-           (magit-rev-parse-true "--is-inside-work-tree")
-         (magit-invalid-git-boolean
-          (and (not noerror)
-               (signal 'magit-outside-git-repo default-directory))))))
-
-(defun magit-bare-repo-p (&optional noerror)
-  "Return t if the current repository is bare.
-If it is non-bare, then return nil.  If `default-directory'
-isn't below a Git repository, then signal an error unless
-NOERROR is non-nil, in which case return nil."
-  (and (magit--assert-default-directory noerror)
-       (condition-case nil
-           (magit-rev-parse-true "--is-bare-repository")
-         (magit-invalid-git-boolean
-          (and (not noerror)
-               (signal 'magit-outside-git-repo default-directory))))))
-
-(defun magit--assert-default-directory (&optional noerror)
-  (or (file-directory-p default-directory)
-      (and (not noerror)
-           (let ((exists (file-exists-p default-directory)))
-	     (signal (if exists 'file-error 'file-missing)
-		     (list "Running git in directory"
-		           (if exists
-                               "Not a directory"
-                             "No such file or directory")
-		           default-directory))))))
-
-(defun magit-git-repo-p (directory &optional non-bare)
-  "Return t if DIRECTORY is a Git repository.
-When optional NON-BARE is non-nil also return nil if DIRECTORY is
-a bare repository."
-  (and (file-directory-p directory) ; Avoid archives, see #3397.
-       (or (file-regular-p (expand-file-name ".git" directory))
-           (file-directory-p (expand-file-name ".git" directory))
-           (and (not non-bare)
-                (file-regular-p (expand-file-name "HEAD" directory))
-                (file-directory-p (expand-file-name "refs" directory))
-                (file-directory-p (expand-file-name "objects" directory))))))
-
-(defvar-local magit-buffer-revision  nil)
-(defvar-local magit-buffer-refname   nil)
-(defvar-local magit-buffer-file-name nil)
-(put 'magit-buffer-revision  'permanent-local t)
-(put 'magit-buffer-refname   'permanent-local t)
-(put 'magit-buffer-file-name 'permanent-local t)
-
-(defun magit-file-relative-name (&optional file tracked)
-  "Return the path of FILE relative to the repository root.
-
-If optional FILE is nil or omitted, return the relative path of
-the file being visited in the current buffer, if any, else nil.
-If the file is not inside a Git repository, then return nil.
-
-If TRACKED is non-nil, return the path only if it matches a
-tracked file."
-  (unless file
-    (with-current-buffer (or (buffer-base-buffer)
-                             (current-buffer))
-      (setq file (or magit-buffer-file-name buffer-file-name
-                     (and (derived-mode-p 'dired-mode) default-directory)))))
-  (when (and file (or (not tracked)
-                      (magit-file-tracked-p (file-relative-name file))))
-    (--when-let (magit-toplevel
-                 (magit--safe-default-directory
-                  (directory-file-name (file-name-directory file))))
-      (file-relative-name file it))))
-
-(defun magit-file-tracked-p (file)
-  (magit-git-success "ls-files" "--error-unmatch" file))
-
-(defun magit-list-files (&rest args)
-  (apply #'magit-git-items "ls-files" "-z" "--full-name" args))
-
-(defun magit-tracked-files ()
-  (magit-list-files "--cached"))
-
-(defun magit-untracked-files (&optional all files)
-  (magit-list-files "--other" (unless all "--exclude-standard") "--" files))
-
-(defun magit-unstaged-files (&optional nomodules files)
-  (magit-git-items "diff-files" "-z" "--name-only"
-                   (and nomodules "--ignore-submodules")
-                   "--" files))
-
-(defun magit-staged-files (&optional nomodules files)
-  (magit-git-items "diff-index" "-z" "--name-only" "--cached"
-                   (and nomodules "--ignore-submodules")
-                   (magit-headish) "--" files))
-
-(defun magit-staged-binary-files ()
-  (--mapcat (and (string-match "^-\t-\t\\(.+\\)" it)
-                 (list (match-string 1 it)))
-            (magit-git-items "diff" "-z" "--cached"
-                             "--numstat" "--ignore-submodules")))
-
-(defun magit-unmerged-files ()
-  (magit-git-items "diff-files" "-z" "--name-only" "--diff-filter=U"))
-
-(defun magit-ignored-files ()
-  (magit-git-items "ls-files" "-z" "--others" "--ignored"
-                   "--exclude-standard" "--directory"))
-
-(defun magit-revision-files (rev)
-  (magit-with-toplevel
-    (magit-git-items "ls-tree" "-z" "-r" "--name-only" rev)))
-
-(defun magit-changed-files (rev-or-range &optional other-rev)
-  "Return list of files the have changed between two revisions.
-If OTHER-REV is non-nil, REV-OR-RANGE should be a revision, not a
-range.  Otherwise, it can be any revision or range accepted by
-\"git diff\" (i.e., <rev>, <revA>..<revB>, or <revA>...<revB>)."
-  (magit-with-toplevel
-    (magit-git-items "diff" "-z" "--name-only" rev-or-range other-rev)))
-
-(defun magit-renamed-files (revA revB)
-  (--map (cons (nth 1 it) (nth 2 it))
-         (-partition 3 (magit-git-items
-                        "diff-tree" "-r" "--diff-filter=R" "-z" "-M"
-                        revA revB))))
-
-(defun magit-file-status (&rest args)
-  (with-temp-buffer
-    (save-excursion (magit-git-insert "status" "-z" args))
-    (let ((pos (point)) status)
-      (while (> (skip-chars-forward "[:print:]") 0)
-        (let ((x (char-after     pos))
-              (y (char-after (1+ pos)))
-              (file (buffer-substring (+ pos 3) (point))))
-          (forward-char)
-          (if (memq x '(?R ?C))
-              (progn
-                (setq pos (point))
-                (skip-chars-forward "[:print:]")
-                (push (list file (buffer-substring pos (point)) x y) status)
-                (forward-char))
-            (push (list file nil x y) status)))
-        (setq pos (point)))
-      status)))
-
-(defcustom magit-cygwin-mount-points
-  (when (eq system-type 'windows-nt)
-    (cl-sort (--map (if (string-match "^\\(.*\\) on \\(.*\\) type" it)
-                        (cons (file-name-as-directory (match-string 2 it))
-                              (file-name-as-directory (match-string 1 it)))
-                      (lwarn '(magit) :error
-                             "Failed to parse Cygwin mount: %S" it))
-                    ;; If --exec-path is not a native Windows path,
-                    ;; then we probably have a cygwin git.
-                    (let ((process-environment
-                           (append magit-git-environment process-environment)))
-                      (and (not (string-match-p
-                                 "\\`[a-zA-Z]:"
-                                 (car (process-lines
-                                       magit-git-executable "--exec-path"))))
-                           (ignore-errors (process-lines "mount")))))
-             #'> :key (pcase-lambda (`(,cyg . ,_win)) (length cyg))))
-  "Alist of (CYGWIN . WIN32) directory names.
-Sorted from longest to shortest CYGWIN name."
-  :package-version '(magit . "2.3.0")
-  :group 'magit-process
-  :type '(alist :key-type string :value-type directory))
-
-(defun magit-expand-git-file-name (filename)
-  (unless (file-name-absolute-p filename)
-    (setq filename (expand-file-name filename)))
-  (-if-let ((cyg . win)
-            (cl-assoc filename magit-cygwin-mount-points
-                      :test (lambda (f cyg) (string-prefix-p cyg f))))
-      (concat win (substring filename (length cyg)))
-    filename))
-
-(defun magit-convert-filename-for-git (filename)
-  "Convert FILENAME so that it can be passed to git.
-1. If it's a remote filename, then remove the remote part.
-2. Deal with an `windows-nt' Emacs vs. Cygwin Git incompatibility."
-  (if (file-name-absolute-p filename)
-      (-if-let ((cyg . win)
-                (cl-rassoc filename magit-cygwin-mount-points
-                           :test (lambda (f win) (string-prefix-p win f))))
-          (concat cyg (substring filename (length win)))
-        (or (file-remote-p filename 'localname)
-            filename))
-    filename))
-
-(defun magit-decode-git-path (path)
-  (if (eq (aref path 0) ?\")
-      (decode-coding-string (read path)
-                            (or magit-git-output-coding-system
-                                (car default-process-coding-system))
-                            t)
-    path))
-
-(defun magit-file-at-point ()
-  (magit-section-case
-    (file (oref it value))
-    (hunk (magit-section-parent-value it))))
-
-(defun magit-current-file ()
-  (or (magit-file-relative-name)
-      (magit-file-at-point)
-      (and (derived-mode-p 'magit-log-mode)
-           (car (nth 2 magit-refresh-args)))))
-
-;;; Predicates
-
-(defun magit-no-commit-p ()
-  "Return t if there is no commit in the current Git repository."
-  (not (magit-rev-verify "HEAD")))
-
-(defun magit-merge-commit-p (commit)
-  "Return t if COMMIT is a merge commit."
-  (> (length (magit-commit-parents commit)) 1))
-
-(defun magit-anything-staged-p (&optional ignore-submodules &rest files)
-  "Return t if there are any staged changes.
-If optional FILES is non-nil, then only changes to those files
-are considered."
-  (magit-git-failure "diff" "--quiet" "--cached"
-                     (and ignore-submodules "--ignore-submodules")
-                     "--" files))
-
-(defun magit-anything-unstaged-p (&optional ignore-submodules &rest files)
-  "Return t if there are any unstaged changes.
-If optional FILES is non-nil, then only changes to those files
-are considered."
-  (magit-git-failure "diff" "--quiet"
-                     (and ignore-submodules "--ignore-submodules")
-                     "--" files))
-
-(defun magit-anything-modified-p (&optional ignore-submodules &rest files)
-  "Return t if there are any staged or unstaged changes.
-If optional FILES is non-nil, then only changes to those files
-are considered."
-  (or (apply 'magit-anything-staged-p   ignore-submodules files)
-      (apply 'magit-anything-unstaged-p ignore-submodules files)))
-
-(defun magit-anything-unmerged-p (&rest files)
-  "Return t if there are any merge conflicts.
-If optional FILES is non-nil, then only conflicts in those files
-are considered."
-  (and (magit-git-string "ls-files" "--unmerged" files) t))
-
-(defun magit-module-worktree-p (module)
-  (magit-with-toplevel
-    (file-exists-p (expand-file-name (expand-file-name ".git" module)))))
-
-(defun magit-module-no-worktree-p (module)
-  (not (magit-module-worktree-p module)))
-
-(defun magit-ignore-submodules-p ()
-  (cl-find-if (lambda (arg)
-                (string-prefix-p "--ignore-submodules" arg))
-              magit-diff-section-arguments))
-
-;;; Revisions and References
-
-(defun magit-rev-parse (&rest args)
-  "Execute `git rev-parse ARGS', returning first line of output.
-If there is no output, return nil."
-  (apply #'magit-git-string "rev-parse" args))
-
-(defun magit-rev-parse-safe (&rest args)
-  "Execute `git rev-parse ARGS', returning first line of output.
-If there is no output, return nil.  Like `magit-rev-parse' but
-ignore `magit-git-debug'."
-  (apply #'magit-git-str "rev-parse" args))
-
-(defun magit-rev-parse-true (&rest args)
-  "Execute `git rev-parse ARGS', returning t if it prints \"true\".
-If it prints \"false\", then return nil.  For any other output
-signal an error."
-  (magit-git-true "rev-parse" args))
-
-(defun magit-rev-parse-false (&rest args)
-  "Execute `git rev-parse ARGS', returning t if it prints \"false\".
-If it prints \"true\", then return nil.  For any other output
-signal an error."
-  (magit-git-false "rev-parse" args))
-
-(defun magit-rev-parse-p (&rest args)
-  "Execute `git rev-parse ARGS', returning t if it prints \"true\".
-Return t if the first (and usually only) output line is the
-string \"true\", otherwise return nil."
-  (equal (magit-git-str "rev-parse" args) "true"))
-
-(defun magit-rev-verify (rev)
-  (magit-rev-parse-safe "--verify" rev))
-
-(defun magit-rev-verify-commit (rev)
-  "Return full hash for REV if it names an existing commit."
-  (magit-rev-verify (concat rev "^{commit}")))
-
-(defun magit-rev-equal (a b)
-  (magit-git-success "diff" "--quiet" a b))
-
-(defun magit-rev-eq (a b)
-  (let ((a (magit-rev-verify a))
-        (b (magit-rev-verify b)))
-    (and a b (equal a b))))
-
-(defun magit-rev-ancestor-p (a b)
-  "Return non-nil if commit A is an ancestor of commit B."
-  (magit-git-success "merge-base" "--is-ancestor" a b))
-
-(defun magit-rev-head-p (rev)
-  (or (equal rev "HEAD")
-      (and rev
-           (not (string-match-p "\\.\\." rev))
-           (equal (magit-rev-parse rev)
-                  (magit-rev-parse "HEAD")))))
-
-(defun magit-rev-author-p (rev)
-  "Return t if the user is the author of REV.
-More precisely return t if `user.name' is equal to the author
-name of REV and/or `user.email' is equal to the author email
-of REV."
-  (or (equal (magit-get "user.name")  (magit-rev-format "%an" rev))
-      (equal (magit-get "user.email") (magit-rev-format "%ae" rev))))
-
-(defun magit-rev-name (rev &optional pattern)
-  "Return a symbolic name for REV.
-PATTERN is passed to the `--refs' flag of `git-name-rev' and can
-be used to limit the result to a matching ref.  When structured
-as \"refs/<subdir>/*\", PATTERN is taken as a namespace.  In this
-case, the name returned by `git-name-rev' is discarded if it
-corresponds to a ref outside of the namespace."
-  (--when-let (magit-git-string "name-rev" "--name-only" "--no-undefined"
-                                (and pattern (concat "--refs=" pattern))
-                                rev)
-    ;; We can't use name-rev's --exclude to filter out "*/PATTERN"
-    ;; because --exclude wasn't added until Git v2.13.0.
-    (if (and pattern
-             (string-match-p "\\`refs/[^/]+/\\*\\'" pattern))
-        (let ((namespace (substring pattern 0 -1)))
-          (unless (and (string-match-p namespace it)
-                       (not (magit-rev-verify (concat namespace it))))
-            it))
-      it)))
-
-(defun magit-rev-branch (rev)
-  (--when-let (magit-rev-name rev "refs/heads/*")
-    (unless (string-match-p "[~^]" it) it)))
-
-(defun magit-get-shortname (rev)
-  (let* ((fn (apply-partially 'magit-rev-name rev))
-         (name (or (funcall fn "refs/tags/*")
-                   (funcall fn "refs/heads/*")
-                   (funcall fn "refs/remotes/*"))))
-    (cond ((not name)
-           (magit-rev-parse "--short" rev))
-          ((string-match "^\\(?:tags\\|remotes\\)/\\(.+\\)" name)
-           (if (magit-ref-ambiguous-p (match-string 1 name))
-               name
-             (match-string 1 name)))
-          (t (magit-ref-maybe-qualify name)))))
-
-(defun magit-name-branch (rev &optional lax)
-  (or (magit-name-local-branch rev)
-      (magit-name-remote-branch rev)
-      (and lax (or (magit-name-local-branch rev t)
-                   (magit-name-remote-branch rev t)))))
-
-(defun magit-name-local-branch (rev &optional lax)
-  (--when-let (magit-rev-name rev "refs/heads/*")
-    (and (or lax (not (string-match-p "[~^]" it))) it)))
-
-(defun magit-name-remote-branch (rev &optional lax)
-  (--when-let (magit-rev-name rev "refs/remotes/*")
-    (and (or lax (not (string-match-p "[~^]" it)))
-         (substring it 8))))
-
-(defun magit-name-tag (rev &optional lax)
-  (--when-let (magit-rev-name rev "refs/tags/*")
-    (and (or lax (not (string-match-p "[~^]" it)))
-         (substring it 5))))
-
-(defun magit-ref-fullname (name)
-  "Return fully qualified refname for NAME.
-If NAME is ambiguous, return nil.  NAME may include suffixes such
-as \"^1\" and \"~3\".  "
-  (save-match-data
-    (if (string-match "\\`\\([^^~]+\\)\\(.*\\)" name)
-        (--when-let (magit-rev-parse "--symbolic-full-name"
-                                     (match-string 1 name))
-          (concat it (match-string 2 name)))
-      (error "`name' has an unrecognized format"))))
-
-(defun magit-ref-ambiguous-p (name)
-  (not (magit-ref-fullname name)))
-
-(cl-defun magit-ref-maybe-qualify (name &optional (prefix "heads/"))
-  "If NAME is ambiguous, prepend PREFIX to it."
-  (concat (and (magit-ref-ambiguous-p name)
-               prefix)
-          name))
-
-(defun magit-ref-exists-p (ref)
-  (magit-git-success "show-ref" "--verify" ref))
-
-(defun magit-ref-equal (a b)
-  "Return t if the refs A and B are `equal'.
-A symbolic-ref pointing to some ref, is `equal' to that ref,
-as are two symbolic-refs pointing to the same ref."
-  (equal (magit-ref-fullname a)
-         (magit-ref-fullname b)))
-
-(defun magit-ref-eq (a b)
-  "Return t if the refs A and B are `eq'.
-A symbolic-ref is `eq' to itself, but not to the ref it points
-to, or to some other symbolic-ref that points to the same ref."
-  (let ((symbolic-a (magit-symbolic-ref-p a))
-        (symbolic-b (magit-symbolic-ref-p b)))
-    (or (and symbolic-a
-             symbolic-b
-             (equal a b))
-        (and (not symbolic-a)
-             (not symbolic-b)
-             (magit-ref-equal a b)))))
-
-(defun magit-headish ()
-  "Return \"HEAD\" or if that doesn't exist the hash of the empty tree."
-  (if (magit-no-commit-p)
-      (magit-git-string "mktree")
-    "HEAD"))
-
-(defun magit-branch-at-point ()
-  (magit-section-case
-    (branch (oref it value))
-    (commit (or (magit--painted-branch-at-point)
-                (magit-name-branch (oref it value))))))
-
-(defun magit--painted-branch-at-point (&optional type)
-  (or (and (not (eq type 'remote))
-           (memq (get-text-property (point) 'face)
-                 (list 'magit-branch-local
-                       'magit-branch-current))
-           (cdr (magit-split-branch-name
-                 (thing-at-point 'git-revision t))))
-      (and (not (eq type 'local))
-           (memq (get-text-property (point) 'face)
-                 (list 'magit-branch-remote
-                       'magit-branch-remote-head))
-           (thing-at-point 'git-revision t))))
-
-(defun magit-local-branch-at-point ()
-  (magit-section-case
-    (branch (let ((branch (magit-ref-maybe-qualify (oref it value))))
-              (when (member branch (magit-list-local-branch-names))
-                branch)))
-    (commit (or (magit--painted-branch-at-point 'local)
-                (magit-name-local-branch (oref it value))))))
-
-(defun magit-remote-branch-at-point ()
-  (magit-section-case
-    (branch (let ((branch (oref it value)))
-              (when (member branch (magit-list-remote-branch-names))
-                branch)))
-    (commit (or (magit--painted-branch-at-point 'remote)
-                (magit-name-remote-branch (oref it value))))))
-
-(defun magit-commit-at-point ()
-  (or (magit-section-when commit)
-      (and (derived-mode-p 'magit-revision-mode)
-           (car magit-refresh-args))))
-
-(defun magit-branch-or-commit-at-point ()
-  (or magit-buffer-refname
-      (magit-section-case
-        (branch (magit-ref-maybe-qualify (oref it value)))
-        (commit (or (magit--painted-branch-at-point)
-                    (let ((rev (oref it value)))
-                      (or (magit-name-branch rev)
-                          (magit-get-shortname rev)
-                          rev))))
-        (tag (magit-ref-maybe-qualify (oref it value) "tags/")))
-      (thing-at-point 'git-revision t)
-      (and (derived-mode-p 'magit-revision-mode
-                           'magit-merge-preview-mode)
-           (car magit-refresh-args))))
-
-(defun magit-tag-at-point ()
-  (magit-section-case
-    (tag    (oref it value))
-    (commit (magit-name-tag (oref it value)))))
-
-(defun magit-stash-at-point ()
-  (magit-section-when stash))
-
-(defun magit-remote-at-point ()
-  (magit-section-case
-    (remote (oref it value))
-    (branch (magit-section-parent-value it))))
-
-(defun magit-module-at-point (&optional predicate)
-  (magit-section-when
-      '(submodule
-        [file modules-unpulled-from-upstream]
-        [file modules-unpulled-from-pushremote]
-        [file modules-unpushed-to-upstream]
-        [file modules-unpushed-to-pushremote])
-    (let ((module (oref it value)))
-      (and (or (not predicate)
-               (funcall predicate module))
-           module))))
-
-(defun magit-get-current-branch ()
-  "Return the refname of the currently checked out branch.
-Return nil if no branch is currently checked out."
-  (magit-git-string "symbolic-ref" "--short" "HEAD"))
-
-(defvar magit-get-previous-branch-timeout 0.5
-  "Maximum time to spend in `magit-get-previous-branch'.
-Given as a number of seconds.")
-
-(defun magit-get-previous-branch ()
-  "Return the refname of the previously checked out branch.
-Return nil if no branch can be found in the `HEAD' reflog
-which is different from the current branch and still exists.
-The amount of time spent searching is limited by
-`magit-get-previous-branch-timeout'."
-  (let ((t0 (float-time))
-        (current (magit-get-current-branch))
-        (i 1) prev)
-    (while (if (> (- (float-time) t0) magit-get-previous-branch-timeout)
-               (setq prev nil) ;; Timed out.
-             (and (setq prev (magit-rev-verify (format "@{-%i}" i)))
-                  (or (not (setq prev (magit-rev-branch prev)))
-                      (equal prev current))))
-      (cl-incf i))
-    prev))
-
-(defun magit-get-upstream-ref (&optional branch)
-  (and (or branch (setq branch (magit-get-current-branch)))
-       (let ((remote (magit-get "branch" branch "remote"))
-             (merge  (magit-get "branch" branch "merge")))
-         (when (and remote merge)
-           (cond ((string-equal remote ".") merge)
-                 ((string-prefix-p "refs/heads/" merge)
-                  (concat "refs/remotes/" remote "/" (substring merge 11))))))))
-
-(defun magit-get-upstream-branch (&optional branch verify)
-  (and (or branch (setq branch (magit-get-current-branch)))
-       (when-let ((remote (magit-get "branch" branch "remote"))
-                  (merge  (magit-get "branch" branch "merge")))
-         (and (string-prefix-p "refs/heads/" merge)
-              (let* ((upstream (substring merge 11))
-                     (upstream
-                      (cond ((string-equal remote ".")
-                             (propertize upstream 'face 'magit-branch-local))
-                            ((string-match-p "[@:]" remote)
-                             (propertize (concat remote " " upstream)
-                                         'face 'magit-branch-remote))
-                            (t
-                             (propertize (concat remote "/" upstream)
-                                         'face 'magit-branch-remote)))))
-                (and (or (not verify)
-                         (magit-rev-verify upstream))
-                     upstream))))))
-
-(defun magit-get-indirect-upstream-branch (branch &optional force)
-  (let ((remote (magit-get "branch" branch "remote")))
-    (and remote (not (equal remote "."))
-         ;; The user has opted in...
-         (or force
-             (--some (if (magit-git-success "check-ref-format" "--branch" it)
-                         (equal it branch)
-                       (string-match-p it branch))
-                     magit-branch-prefer-remote-upstream))
-         ;; and local BRANCH tracks a remote branch...
-         (let ((upstream (magit-get-upstream-branch branch)))
-           ;; whose upstream...
-           (and upstream
-                ;; has the same name as BRANCH and...
-                (equal (substring upstream (1+ (length remote))) branch)
-                ;; and can be fast-forwarded to BRANCH.
-                (magit-rev-ancestor-p upstream branch)
-                upstream)))))
-
-(defun magit-get-upstream-remote (&optional branch)
-  (and (or branch (setq branch (magit-get-current-branch)))
-       (magit-get "branch" branch "remote")))
-
-(defun magit-get-push-remote (&optional branch)
-  (or (and (or branch (setq branch (magit-get-current-branch)))
-           (magit-get "branch" branch "pushRemote"))
-      (magit-get "remote.pushDefault")))
-
-(defun magit-get-push-branch (&optional branch verify)
-  (and (or branch (setq branch (magit-get-current-branch)))
-       (when-let ((remote (magit-get-push-remote branch))
-                  (push-branch (concat remote "/" branch)))
-         (and (or (not verify)
-                  (magit-rev-verify push-branch))
-              push-branch))))
-
-(defun magit-get-@{push}-branch (&optional branch)
-  (let ((ref (magit-rev-parse "--symbolic-full-name"
-                              (concat branch "@{push}"))))
-    (when (and ref (string-prefix-p "refs/remotes/" ref))
-      (substring ref 13))))
-
-(defun magit-get-remote (&optional branch)
-  (when (or branch (setq branch (magit-get-current-branch)))
-    (let ((remote (magit-get "branch" branch "remote")))
-      (unless (equal remote ".")
-        remote))))
-
-(defun magit-get-some-remote (&optional branch)
-  (or (magit-get-remote branch)
-      (and (magit-branch-p "master")
-           (magit-get-remote "master"))
-      (let ((remotes (magit-list-remotes)))
-        (or (car (member "origin" remotes))
-            (car remotes)))))
-
-(defun magit-branch-merged-p (branch &optional target)
-  "Return non-nil if BRANCH is merged into its upstream and TARGET.
-
-TARGET defaults to the current branch.  If `HEAD' is detached and
-TARGET is nil, then always return nil.  As a special case, if
-TARGET is t, then return non-nil if BRANCH is merged into any one
-of the other local branches.
-
-If, and only if, BRANCH has an upstream, then only return non-nil
-if BRANCH is merged into both TARGET (as described above) as well
-as into its upstream."
-  (and (--if-let (and (magit-branch-p branch)
-                      (magit-get-upstream-branch branch))
-           (magit-git-success "merge-base" "--is-ancestor" branch it)
-         t)
-       (if (eq target t)
-           (delete (magit-name-local-branch branch)
-                   (magit-list-containing-branches branch))
-         (--when-let (or target (magit-get-current-branch))
-           (magit-git-success "merge-base" "--is-ancestor" branch it)))))
-
-(defun magit-split-branch-name (branch)
-  (cond ((member branch (magit-list-local-branch-names))
-         (cons "." branch))
-        ((string-match " " branch)
-         (pcase-let ((`(,url ,branch) (split-string branch " ")))
-           (cons url branch)))
-        ((string-match "/" branch)
-         (let ((remote (substring branch 0 (match-beginning 0))))
-           (if (save-match-data (member remote (magit-list-remotes)))
-               (cons remote (substring branch (match-end 0)))
-             (error "Invalid branch name %s" branch))))))
-
-(defun magit-get-current-tag (&optional rev with-distance)
-  "Return the closest tag reachable from REV.
-
-If optional REV is nil, then default to `HEAD'.
-If optional WITH-DISTANCE is non-nil then return (TAG COMMITS),
-if it is `dirty' return (TAG COMMIT DIRTY). COMMITS is the number
-of commits in `HEAD' but not in TAG and DIRTY is t if there are
-uncommitted changes, nil otherwise."
-  (--when-let (magit-git-str "describe" "--long" "--tags"
-                             (and (eq with-distance 'dirty) "--dirty") rev)
-    (save-match-data
-      (string-match
-       "\\(.+\\)-\\(?:0[0-9]*\\|\\([0-9]+\\)\\)-g[0-9a-z]+\\(-dirty\\)?$" it)
-      (if with-distance
-          `(,(match-string 1 it)
-            ,(string-to-number (or (match-string 2 it) "0"))
-            ,@(and (match-string 3 it) (list t)))
-        (match-string 1 it)))))
-
-(defun magit-get-next-tag (&optional rev with-distance)
-  "Return the closest tag from which REV is reachable.
-
-If optional REV is nil, then default to `HEAD'.
-If no such tag can be found or if the distance is 0 (in which
-case it is the current tag, not the next), return nil instead.
-If optional WITH-DISTANCE is non-nil, then return (TAG COMMITS)
-where COMMITS is the number of commits in TAG but not in REV."
-  (--when-let (magit-git-str "describe" "--contains" (or rev "HEAD"))
-    (save-match-data
-      (when (string-match "^[^^~]+" it)
-        (setq it (match-string 0 it))
-        (unless (equal it (magit-get-current-tag rev))
-          (if with-distance
-              (list it (car (magit-rev-diff-count it rev)))
-            it))))))
-
-(defvar magit-list-refs-namespaces
-  '("refs/heads" "refs/remotes" "refs/tags" "refs/pull"))
-
-(defun magit-list-refs (&optional namespaces format sortby)
-  "Return list of references.
-
-When NAMESPACES is non-nil, list refs from these namespaces
-rather than those from `magit-list-refs-namespaces'.
-
-FORMAT is passed to the `--format' flag of `git for-each-ref'
-and defaults to \"%(refname)\".  If the format is \"%(refname)\"
-or \"%(refname:short)\", then drop the symbolic-ref \"HEAD\".
-
-SORTBY is a key or list of keys to pass to the `--sort' flag of
-`git for-each-ref'.  When nil, use `magit-list-refs-sortby'"
-  (unless format
-    (setq format "%(refname)"))
-  (let ((refs (magit-git-lines "for-each-ref"
-                               (concat "--format=" format)
-                               (--map (concat "--sort=" it)
-                                      (pcase (or sortby magit-list-refs-sortby)
-                                        ((and val (pred stringp)) (list val))
-                                        ((and val (pred listp)) val)))
-                               (or namespaces magit-list-refs-namespaces))))
-    (if (member format '("%(refname)" "%(refname:short)"))
-        (--remove (string-match-p "\\(\\`\\|/\\)HEAD\\'" it) refs)
-      refs)))
-
-(defun magit-list-branches ()
-  (magit-list-refs (list "refs/heads" "refs/remotes")))
-
-(defun magit-list-local-branches ()
-  (magit-list-refs "refs/heads"))
-
-(defun magit-list-remote-branches (&optional remote)
-  (magit-list-refs (concat "refs/remotes/" remote)))
-
-(defun magit-list-related-branches (relation &optional commit arg)
-  (--remove (string-match-p "\\(\\`(HEAD\\|HEAD -> \\)" it)
-            (--map (substring it 2)
-                   (magit-git-lines "branch" arg relation commit))))
-
-(defun magit-list-containing-branches (&optional commit arg)
-  (magit-list-related-branches "--contains" commit arg))
-
-(defun magit-list-publishing-branches (&optional commit)
-  (--filter (magit-rev-ancestor-p commit it)
-            magit-published-branches))
-
-(defun magit-list-merged-branches (&optional commit arg)
-  (magit-list-related-branches "--merged" commit arg))
-
-(defun magit-list-unmerged-branches (&optional commit arg)
-  (magit-list-related-branches "--no-merged" commit arg))
-
-(defun magit-list-unmerged-to-upstream-branches ()
-  (--filter (when-let ((upstream (magit-get-upstream-branch it)))
-              (member it (magit-list-unmerged-branches upstream)))
-            (magit-list-local-branch-names)))
-
-(defun magit-list-branches-pointing-at (commit)
-  (let ((re (format "\\`%s refs/\\(heads\\|remotes\\)/\\(.*\\)\\'"
-                   (magit-rev-verify commit))))
-    (--keep (and (string-match re it)
-                 (let ((name (match-string 2 it)))
-                   (and (not (string-suffix-p "HEAD" name))
-                        name)))
-            (magit-git-lines "show-ref"))))
-
-(defun magit-list-refnames (&optional namespaces)
-  (magit-list-refs namespaces "%(refname:short)"))
-
-(defun magit-list-branch-names ()
-  (magit-list-refnames (list "refs/heads" "refs/remotes")))
-
-(defun magit-list-local-branch-names ()
-  (magit-list-refnames "refs/heads"))
-
-(defun magit-list-remote-branch-names (&optional remote relative)
-  (if (and remote relative)
-      (let ((regexp (format "^refs/remotes/%s/\\(.+\\)" remote)))
-        (--mapcat (when (string-match regexp it)
-                    (list (match-string 1 it)))
-                  (magit-list-remote-branches remote)))
-    (magit-list-refnames (concat "refs/remotes/" remote))))
-
-(defun magit-format-refs (format &rest args)
-  (let ((lines (magit-git-lines
-                "for-each-ref" (concat "--format=" format)
-                (or args (list "refs/heads" "refs/remotes" "refs/tags")))))
-    (if (string-match-p "\f" format)
-        (--map (split-string it "\f") lines)
-      lines)))
-
-(defun magit-list-remotes ()
-  (magit-git-lines "remote"))
-
-(defun magit-list-tags ()
-  (magit-git-lines "tag"))
-
-(defun magit-list-stashes (&optional format)
-  (magit-git-lines "stash" "list" (concat "--format=" (or format "%gd"))))
-
-(defun magit-list-active-notes-refs ()
-  "Return notes refs according to `core.notesRef' and `notes.displayRef'."
-  (magit-git-lines "for-each-ref" "--format=%(refname)"
-                   (or (magit-get "core.notesRef") "refs/notes/commits")
-                   (magit-get-all "notes.displayRef")))
-
-(defun magit-list-notes-refnames ()
-  (--map (substring it 6) (magit-list-refnames "refs/notes")))
-
-(defun magit-remote-list-tags (remote)
-  (--keep (and (not (string-match-p "\\^{}$" it))
-               (substring it 51))
-          (magit-git-lines "ls-remote" "--tags" remote)))
-
-(defun magit-remote-list-branches (remote)
-  (--keep (and (not (string-match-p "\\^{}$" it))
-               (substring it 52))
-          (magit-git-lines "ls-remote" "--heads" remote)))
-
-(defun magit-remote-list-refs (remote)
-  (--keep (and (not (string-match-p "\\^{}$" it))
-               (substring it 41))
-          (magit-git-lines "ls-remote" remote)))
-
-(defun magit-list-module-paths ()
-  (--mapcat (and (string-match "^160000 [0-9a-z]\\{40\\} 0\t\\(.+\\)$" it)
-                 (list (match-string 1 it)))
-            (magit-git-items "ls-files" "-z" "--stage")))
-
-(defun magit-get-submodule-name (path)
-  "Return the name of the submodule at PATH.
-PATH has to be relative to the super-repository."
-  (cadr (split-string
-         (car (or (magit-git-items
-                   "config" "-z"
-                   "-f" (expand-file-name ".gitmodules" (magit-toplevel))
-                   "--get-regexp" "^submodule\\..*\\.path$"
-                   (concat "^" (regexp-quote (directory-file-name path)) "$"))
-                  (error "No such submodule `%s'" path)))
-         "\n")))
-
-(defun magit-list-worktrees ()
-  (let (worktrees worktree)
-    (dolist (line (let ((magit-git-global-arguments
-                         ;; KLUDGE At least in v2.8.3 this triggers a segfault.
-                         (remove "--no-pager" magit-git-global-arguments)))
-                    (magit-git-lines "worktree" "list" "--porcelain")))
-      (cond ((string-prefix-p "worktree" line)
-             (push (setq worktree (list (substring line 9) nil nil nil))
-                   worktrees))
-            ((string-equal line "bare")
-             (let* ((default-directory (car worktree))
-                    (wt (and (not (magit-get-boolean "core.bare"))
-                             (magit-get "core.worktree"))))
-               (if (and wt (file-exists-p (expand-file-name wt)))
-                   (progn (setf (nth 0 worktree) (expand-file-name wt))
-                          (setf (nth 2 worktree) (magit-rev-parse "HEAD"))
-                          (setf (nth 3 worktree) (magit-get-current-branch)))
-                 (setf (nth 1 worktree) t))))
-            ((string-prefix-p "HEAD" line)
-             (setf (nth 2 worktree) (substring line 5)))
-            ((string-prefix-p "branch" line)
-             (setf (nth 3 worktree) (substring line 18)))
-            ((string-equal line "detached"))))
-    (nreverse worktrees)))
-
-(defun magit-symbolic-ref-p (name)
-  (magit-git-success "symbolic-ref" "--quiet" name))
-
-(defun magit-ref-p (rev)
-  (or (car (member rev (magit-list-refs)))
-      (car (member rev (magit-list-refnames)))))
-
-(defun magit-branch-p (rev)
-  (or (car (member rev (magit-list-branches)))
-      (car (member rev (magit-list-branch-names)))))
-
-(defun magit-local-branch-p (rev)
-  (or (car (member rev (magit-list-local-branches)))
-      (car (member rev (magit-list-local-branch-names)))))
-
-(defun magit-remote-branch-p (rev)
-  (or (car (member rev (magit-list-remote-branches)))
-      (car (member rev (magit-list-remote-branch-names)))))
-
-(defun magit-branch-set-face (branch)
-  (propertize branch 'face (if (magit-local-branch-p branch)
-                               'magit-branch-local
-                             'magit-branch-remote)))
-
-(defun magit-tag-p (rev)
-  (car (member rev (magit-list-tags))))
-
-(defun magit-remote-p (string)
-  (car (member string (magit-list-remotes))))
-
-(defun magit-rev-diff-count (a b)
-  "Return the commits in A but not B and vice versa.
-Return a list of two integers: (A>B B>A)."
-  (mapcar 'string-to-number
-          (split-string (magit-git-string "rev-list"
-                                          "--count" "--left-right"
-                                          (concat a "..." b))
-                        "\t")))
-
-(defun magit-abbrev-length ()
-  (--if-let (magit-get "core.abbrev")
-      (string-to-number it)
-    ;; Guess the length git will be using based on an example
-    ;; abbreviation.  Actually HEAD's abbreviation might be an
-    ;; outlier, so use the shorter of the abbreviations for two
-    ;; commits.  When a commit does not exist, then fall back
-    ;; to the default of 7.  See #3034.
-    (min (--if-let (magit-rev-parse "--short" "HEAD")  (length it) 7)
-         (--if-let (magit-rev-parse "--short" "HEAD~") (length it) 7))))
-
-(defun magit-abbrev-arg (&optional arg)
-  (format "--%s=%d" (or arg "abbrev") (magit-abbrev-length)))
-
-(defun magit-rev-abbrev (rev)
-  (magit-rev-parse (magit-abbrev-arg "short") rev))
-
-(defun magit-commit-children (commit &optional args)
-  (mapcar #'car
-          (--filter (member commit (cdr it))
-                    (--map (split-string it " ")
-                           (magit-git-lines
-                            "log" "--format=%H %P"
-                            (or args (list "--branches" "--tags" "--remotes"))
-                            "--not" commit)))))
-
-(defun magit-commit-parents (commit)
-  (--when-let (magit-git-string "rev-list" "-1" "--parents" commit)
-    (cdr (split-string it))))
-
-(defun magit-patch-id (rev)
-  (with-temp-buffer
-    (magit-process-file
-     shell-file-name nil '(t nil) nil shell-command-switch
-     (let ((exec (shell-quote-argument magit-git-executable)))
-       (format "%s diff-tree -u %s | %s patch-id" exec rev exec)))
-    (car (split-string (buffer-string)))))
-
-(defun magit-rev-format (format &optional rev args)
-  (let ((str (magit-git-string "show" "--no-patch"
-                               (concat "--format=" format) args
-                               (if rev (concat rev "^{commit}") "HEAD") "--")))
-    (unless (string-equal str "")
-      str)))
-
-(defun magit-rev-insert-format (format &optional rev args)
-  (magit-git-insert "show" "--no-patch"
-                    (concat "--format=" format) args
-                    (if rev (concat rev "^{commit}") "HEAD") "--"))
-
-(defun magit-format-rev-summary (rev)
-  (--when-let (magit-rev-format "%h %s" rev)
-    (string-match " " it)
-    (put-text-property 0 (match-beginning 0) 'face 'magit-hash it)
-    it))
-
-(defvar magit-ref-namespaces
-  '(("\\`HEAD\\'"                  . magit-head)
-    ("\\`refs/tags/\\(.+\\)"       . magit-tag)
-    ("\\`refs/heads/\\(.+\\)"      . magit-branch-local)
-    ("\\`refs/remotes/\\(.+\\)"    . magit-branch-remote)
-    ("\\`refs/bisect/\\(bad\\)"    . magit-bisect-bad)
-    ("\\`refs/bisect/\\(skip.*\\)" . magit-bisect-skip)
-    ("\\`refs/bisect/\\(good.*\\)" . magit-bisect-good)
-    ("\\`refs/stash$"              . magit-refname-stash)
-    ("\\`refs/wip/\\(.+\\)"        . magit-refname-wip)
-    ("\\`refs/pullreqs/\\(.+\\)"   . magit-refname-pullreq)
-    ("\\`\\(bad\\):"               . magit-bisect-bad)
-    ("\\`\\(skip\\):"              . magit-bisect-skip)
-    ("\\`\\(good\\):"              . magit-bisect-good)
-    ("\\`\\(.+\\)"                 . magit-refname))
-  "How refs are formatted for display.
-
-Each entry controls how a certain type of ref is displayed, and
-has the form (REGEXP . FACE).  REGEXP is a regular expression
-used to match full refs.  The first entry whose REGEXP matches
-the reference is used.  The first regexp submatch becomes the
-\"label\" that represents the ref and is propertized with FONT.")
-
-(defun magit-format-ref-labels (string)
-  ;; To support Git <2.2.0, we remove the surrounding parentheses here
-  ;; rather than specifying that STRING should be generated with Git's
-  ;; "%D" placeholder.
-  (setq string (->> string
-                    (replace-regexp-in-string "\\`\\s-*(" "")
-                    (replace-regexp-in-string ")\\s-*\\'" "")))
-  (save-match-data
-    (let ((regexp "\\(, \\|tag: \\|HEAD -> \\)")
-          names)
-      (if (and (derived-mode-p 'magit-log-mode)
-               (member "--simplify-by-decoration" (cadr magit-refresh-args)))
-          (let ((branches (magit-list-local-branch-names))
-                (re (format "^%s/.+" (regexp-opt (magit-list-remotes)))))
-            (setq names
-                  (--map (cond ((string-equal it "HEAD")     it)
-                               ((string-prefix-p "refs/" it) it)
-                               ((member it branches) (concat "refs/heads/" it))
-                               ((string-match re it) (concat "refs/remotes/" it))
-                               (t                    (concat "refs/" it)))
-                         (split-string
-                          (replace-regexp-in-string "tag: " "refs/tags/" string)
-                          regexp t))))
-        (setq names (split-string string regexp t)))
-      (let (state head tags branches remotes other combined)
-        (dolist (ref names)
-          (let* ((face (cdr (--first (string-match (car it) ref)
-                                     magit-ref-namespaces)))
-                 (name (propertize (or (match-string 1 ref) ref) 'face face)))
-            (cl-case face
-              ((magit-bisect-bad magit-bisect-skip magit-bisect-good)
-               (setq state name))
-              (magit-head
-               (setq head (propertize "@" 'face 'magit-head)))
-              (magit-tag            (push name tags))
-              (magit-branch-local   (push name branches))
-              (magit-branch-remote  (push name remotes))
-              (t                    (push name other)))))
-        (setq remotes
-              (-keep
-               (lambda (name)
-                 (if (string-match "\\`\\([^/]*\\)/\\(.*\\)\\'" name)
-                     (let ((r (match-string 1 name))
-                           (b (match-string 2 name)))
-                       (and (not (equal b "HEAD"))
-                            (if (equal (concat "refs/remotes/" name)
-                                       (magit-git-string
-                                        "symbolic-ref"
-                                        (format "refs/remotes/%s/HEAD" r)))
-                                (propertize name
-                                            'face 'magit-branch-remote-head)
-                              name)))
-                   name))
-               remotes))
-        (dolist (name branches)
-          (let ((push (car (member (magit-get-push-branch name) remotes))))
-            (when push
-              (setq remotes (delete push remotes))
-              (string-match "^[^/]*/" push)
-              (setq push (substring push 0 (match-end 0))))
-            (if (equal name (magit-get-current-branch))
-                (setq head
-                      (concat push
-                              (propertize name 'face 'magit-branch-current)))
-              (push (concat push name) combined))))
-        (mapconcat #'identity
-                   (-flatten `(,state
-                               ,head
-                               ,@(nreverse tags)
-                               ,@(nreverse combined)
-                               ,@(nreverse remotes)
-                               ,@other))
-                   " ")))))
-
-(defun magit-object-type (object)
-  (magit-git-string "cat-file" "-t" object))
-
-(defmacro magit-with-blob (commit file &rest body)
-  (declare (indent 2)
-           (debug (form form body)))
-  `(with-temp-buffer
-     (let ((buffer-file-name ,file))
-       (save-excursion
-         (magit-git-insert "cat-file" "-p"
-                           (concat ,commit ":" buffer-file-name)))
-       (decode-coding-inserted-region
-        (point-min) (point-max) buffer-file-name t nil nil t)
-       ,@body)))
-
-(defmacro magit-with-temp-index (tree arg &rest body)
-  (declare (indent 2) (debug (form form body)))
-  (let ((file (cl-gensym "file")))
-    `(let ((magit--refresh-cache nil)
-           (,file (magit-convert-filename-for-git
-                   (make-temp-name (magit-git-dir "index.magit.")))))
-       (unwind-protect
-           (progn (--when-let ,tree
-                    (or (magit-git-success "read-tree" ,arg it
-                                           (concat "--index-output=" ,file))
-                        (error "Cannot read tree %s" it)))
-                  (if (file-remote-p default-directory)
-                      (let ((magit-tramp-process-environment
-                             (cons (concat "GIT_INDEX_FILE=" ,file)
-                                   magit-tramp-process-environment)))
-                        ,@body)
-                    (let ((process-environment
-                           (cons (concat "GIT_INDEX_FILE=" ,file)
-                                 process-environment)))
-                      ,@body)))
-         (ignore-errors
-           (delete-file (concat (file-remote-p default-directory) ,file)))))))
-
-(defun magit-commit-tree (message &optional tree &rest parents)
-  (magit-git-string "commit-tree" "--no-gpg-sign" "-m" message
-                    (--mapcat (list "-p" it) (delq nil parents))
-                    (or tree
-                        (magit-git-string "write-tree")
-                        (error "Cannot write tree"))))
-
-(defun magit-commit-worktree (message &optional arg &rest other-parents)
-  (magit-with-temp-index "HEAD" arg
-    (and (magit-update-files (magit-unstaged-files))
-         (apply #'magit-commit-tree message nil "HEAD" other-parents))))
-
-(defun magit-update-files (files)
-  (magit-git-success "update-index" "--add" "--remove" "--" files))
-
-(defun magit-update-ref (ref message rev &optional stashish)
-  (let ((magit--refresh-cache nil))
-    (or (if (not (version< (magit-git-version) "2.6.0"))
-            (zerop (magit-call-git "update-ref" "--create-reflog"
-                                   "-m" message ref rev
-                                   (or (magit-rev-verify ref) "")))
-          ;; `--create-reflog' didn't exist before v2.6.0
-          (let ((oldrev  (magit-rev-verify ref))
-                (logfile (magit-git-dir (concat "logs/" ref))))
-            (unless (file-exists-p logfile)
-              (when oldrev
-                (magit-git-success "update-ref" "-d" ref oldrev))
-              (make-directory (file-name-directory logfile) t)
-              (with-temp-file logfile)
-              (when (and oldrev (not stashish))
-                (magit-git-success "update-ref" "-m" "enable reflog"
-                                   ref oldrev ""))))
-          (magit-git-success "update-ref" "-m" message ref rev
-                             (or (magit-rev-verify ref) "")))
-        (error "Cannot update %s with %s" ref rev))))
-
-(defconst magit-range-re
-  (concat "\\`\\([^ \t]*[^.]\\)?"       ; revA
-          "\\(\\.\\.\\.?\\)"            ; range marker
-          "\\([^.][^ \t]*\\)?\\'"))     ; revB
-
-(defun magit-split-range (range)
-  (and (string-match magit-range-re range)
-       (let ((beg (or (match-string 1 range) "HEAD"))
-             (end (or (match-string 3 range) "HEAD")))
-         (cons (if (string-equal (match-string 2 range) "...")
-                   (magit-git-string "merge-base" beg end)
-                 beg)
-               end))))
-
-(defvar magit-thingatpt--git-revision-chars "-./[:alnum:]@{}^~!"
-  "Characters allowable in filenames, excluding space and colon.")
-
-(put 'git-revision 'end-op
-     (lambda ()
-       (re-search-forward
-        (concat "\\=[" magit-thingatpt--git-revision-chars "]*")
-        nil t)))
-
-(put 'git-revision 'beginning-op
-     (lambda ()
-       (if (re-search-backward
-            (concat "[^" magit-thingatpt--git-revision-chars "]") nil t)
-           (forward-char)
-         (goto-char (point-min)))))
-
-(put 'git-revision 'thing-at-point 'magit-thingatpt--git-revision)
-
-(defun magit-thingatpt--git-revision ()
-  (--when-let (bounds-of-thing-at-point 'git-revision)
-    (let ((text (buffer-substring-no-properties (car it) (cdr it))))
-      (and (magit-rev-verify-commit text) text))))
-
-;;; Completion
-
-(defvar magit-revision-history nil)
-
-(defun magit-read-branch (prompt &optional secondary-default)
-  (magit-completing-read prompt (magit-list-branch-names)
-                         nil t nil 'magit-revision-history
-                         (or (magit-branch-at-point)
-                             secondary-default
-                             (magit-get-current-branch))))
-
-(defun magit-read-branch-or-commit (prompt &optional secondary-default)
-  (or (magit-completing-read prompt (cons "HEAD" (magit-list-refnames))
-                             nil nil nil 'magit-revision-history
-                             (or (magit-branch-or-commit-at-point)
-                                 secondary-default
-                                 (magit-get-current-branch)))
-      (user-error "Nothing selected")))
-
-(defun magit-read-range-or-commit (prompt &optional secondary-default)
-  (magit-read-range
-   prompt
-   (or (--when-let (magit-region-values '(commit branch) t)
-         (deactivate-mark)
-         (concat (car (last it)) ".." (car it)))
-       (magit-branch-or-commit-at-point)
-       secondary-default
-       (magit-get-current-branch))))
-
-(defun magit-read-range (prompt &optional default)
-  (magit-completing-read-multiple prompt
-                                  (magit-list-refnames)
-                                  "\\.\\.\\.?"
-                                  default 'magit-revision-history))
-
-(defun magit-read-remote-branch
-    (prompt &optional remote default local-branch require-match)
-  (let ((choice (magit-completing-read
-                 prompt
-                 (-union (and local-branch
-                              (if remote
-                                  (concat remote "/" local-branch)
-                                (--map (concat it "/" local-branch)
-                                       (magit-list-remotes))))
-                         (magit-list-remote-branch-names remote t))
-                 nil require-match nil 'magit-revision-history default)))
-    (if (or remote (string-match "\\`\\([^/]+\\)/\\(.+\\)" choice))
-        choice
-      (user-error "`%s' doesn't have the form REMOTE/BRANCH" choice))))
-
-(defun magit-read-refspec (prompt remote)
-  (magit-completing-read prompt
-                         (prog2 (message "Determining available refs...")
-                             (magit-remote-list-refs remote)
-                           (message "Determining available refs...done"))))
-
-(defun magit-read-local-branch (prompt &optional secondary-default)
-  (magit-completing-read prompt (magit-list-local-branch-names)
-                         nil t nil 'magit-revision-history
-                         (or (magit-local-branch-at-point)
-                             secondary-default
-                             (magit-get-current-branch))))
-
-(defun magit-read-local-branch-or-commit (prompt)
-  (let ((branches (magit-list-local-branch-names))
-        (commit (magit-commit-at-point)))
-    (or (magit-completing-read prompt
-                               (if commit (cons commit branches) branches)
-                               nil nil nil 'magit-revision-history
-                               (or (magit-local-branch-at-point) commit))
-                     (user-error "Nothing selected"))))
-
-(defun magit-read-local-branch-or-ref (prompt &optional secondary-default)
-  (magit-completing-read prompt (nconc (magit-list-local-branch-names)
-                                       (magit-list-refs "refs/"))
-                         nil t nil 'magit-revision-history
-                         (or (magit-local-branch-at-point)
-                             secondary-default
-                             (magit-get-current-branch))))
-
-(defun magit-read-other-branch
-    (prompt &optional exclude secondary-default no-require-match)
-  (let* ((current (magit-get-current-branch))
-         (atpoint (magit-branch-at-point))
-         (exclude (or exclude current))
-         (default (or (and (not (equal atpoint exclude)) atpoint)
-                      (and (not (equal current exclude)) current)
-                      secondary-default
-                      (magit-get-previous-branch))))
-    (magit-completing-read prompt (delete exclude (magit-list-branch-names))
-                           nil (not no-require-match)
-                           nil 'magit-revision-history default)))
-
-(defun magit-read-other-branch-or-commit
-    (prompt &optional exclude secondary-default)
-  (let* ((current (magit-get-current-branch))
-         (atpoint (magit-branch-or-commit-at-point))
-         (exclude (or exclude current))
-         (default (or (and (not (equal atpoint exclude)) atpoint)
-                      (and (not (equal current exclude)) current)
-                      secondary-default
-                      (magit-get-previous-branch))))
-    (or (magit-completing-read prompt (delete exclude (magit-list-refnames))
-                               nil nil nil 'magit-revision-history default)
-        (user-error "Nothing selected"))))
-
-(defun magit-read-other-local-branch
-    (prompt &optional exclude secondary-default no-require-match)
-  (let* ((current (magit-get-current-branch))
-         (atpoint (magit-local-branch-at-point))
-         (exclude (or exclude current))
-         (default (or (and (not (equal atpoint exclude)) atpoint)
-                      (and (not (equal current exclude)) current)
-                      secondary-default
-                      (magit-get-previous-branch))))
-    (magit-completing-read prompt
-                           (delete exclude (magit-list-local-branch-names))
-                           nil (not no-require-match)
-                           nil 'magit-revision-history default)))
-
-(defun magit-read-branch-prefer-other (prompt)
-  (let* ((current (magit-get-current-branch))
-         (commit  (magit-commit-at-point))
-         (atrev   (and commit (magit-list-branches-pointing-at commit)))
-         (atpoint (magit--painted-branch-at-point)))
-    (magit-completing-read prompt (magit-list-branch-names)
-                           nil t nil 'magit-revision-history
-                           (or (magit-section-when 'branch)
-                               atpoint
-                               (and (not (cdr atrev)) (car atrev))
-                               (--first (not (equal it current)) atrev)
-                               (magit-get-previous-branch)
-                               (car atrev)))))
-
-(cl-defun magit-read-upstream-branch
-    (&optional (branch (magit-get-current-branch)) prompt)
-  (magit-completing-read
-   (or prompt (format "Change upstream of %s to" branch))
-   (-union (--map (concat it "/" branch)
-                  (magit-list-remotes))
-           (delete branch (magit-list-branch-names)))
-   nil nil nil 'magit-revision-history
-   (or (let ((r (magit-remote-branch-at-point))
-             (l (magit-branch-at-point)))
-         (when (and l (equal l branch))
-           (setq l nil))
-         (if magit-prefer-remote-upstream (or r l) (or l r)))
-       (let ((r (magit-branch-p "origin/master"))
-             (l (and (not (equal branch "master"))
-                     (magit-branch-p "master"))))
-         (if magit-prefer-remote-upstream (or r l) (or l r)))
-       (let ((previous (magit-get-previous-branch)))
-         (and (not (equal previous branch)) previous)))))
-
-(defun magit-read-starting-point (prompt &optional branch)
-  (or (magit-completing-read
-       (concat prompt
-               (and branch
-                    (if (bound-and-true-p ivy-mode)
-                        ;; Ivy-mode strips faces from prompt.
-                        (format  " `%s'" branch)
-                      (concat " "
-                              (propertize branch 'face 'magit-branch-local))))
-               " starting at")
-       (nconc (list "HEAD")
-              (magit-list-refnames)
-              (directory-files (magit-git-dir) nil "_HEAD\\'"))
-       nil nil nil 'magit-revision-history
-       (magit--default-starting-point))
-      (user-error "Nothing selected")))
-
-(defun magit--default-starting-point ()
-  (or (let ((r (magit-remote-branch-at-point))
-            (l (magit-local-branch-at-point)))
-        (if magit-prefer-remote-upstream (or r l) (or l r)))
-      (magit-commit-at-point)
-      (magit-stash-at-point)
-      (magit-get-current-branch)))
-
-(defun magit-read-tag (prompt &optional require-match)
-  (magit-completing-read prompt (magit-list-tags) nil
-                         require-match nil 'magit-revision-history
-                         (magit-tag-at-point)))
-
-(defun magit-read-stash (prompt)
-  (let ((stashes (magit-list-stashes)))
-    (magit-completing-read prompt stashes nil t nil nil
-                           (magit-stash-at-point)
-                           (car stashes))))
-
-(defun magit-read-remote (prompt &optional default use-only)
-  (let ((remotes (magit-list-remotes)))
-    (if (and use-only (= (length remotes) 1))
-        (car remotes)
-      (magit-completing-read prompt remotes
-                             nil t nil nil
-                             (or default
-                                 (magit-remote-at-point)
-                                 (magit-get-remote))))))
-
-(defun magit-read-remote-or-url (prompt &optional default)
-  (magit-completing-read prompt
-                         (nconc (magit-list-remotes)
-                                (list "https://" "git://" "git@"))
-                         nil nil nil nil
-                         (or default
-                             (magit-remote-at-point)
-                             (magit-get-remote))))
-
-(defun magit-read-module-path (prompt &optional predicate)
-  (magit-completing-read prompt (magit-list-module-paths)
-                         predicate t nil nil
-                         (magit-module-at-point predicate)))
-
-(defun magit-module-confirm (verb &optional predicate)
-  (let (modules)
-    (if current-prefix-arg
-        (progn
-          (setq modules (magit-list-module-paths))
-          (when predicate
-            (setq modules (-filter predicate modules)))
-          (unless modules
-            (if predicate
-                (user-error "No modules satisfying %s available" predicate)
-              (user-error "No modules available"))))
-      (setq modules (magit-region-values
-                     '(submodule
-                       [file modules-unpulled-from-upstream]
-                       [file modules-unpulled-from-pushremote]
-                       [file modules-unpushed-to-upstream]
-                       [file modules-unpushed-to-pushremote])))
-      (when modules
-        (when predicate
-          (setq modules (-filter predicate modules)))
-        (unless modules
-          (user-error "No modules satisfying %s selected" predicate))))
-    (if (> (length modules) 1)
-        (magit-confirm t nil (format "%s %%i modules" verb) nil modules)
-      (list (magit-read-module-path (format "%s module" verb) predicate)))))
-
-;;; Variables
-
-(defun magit-config-get-from-cached-list (key)
-  (gethash
-   ;; `git config --list' downcases first and last components of the key.
-   (--> key
-        (replace-regexp-in-string "\\`[^.]+" #'downcase it t t)
-        (replace-regexp-in-string "[^.]+\\'" #'downcase it t t))
-   (magit--with-refresh-cache (cons (magit-toplevel) 'config)
-     (let ((configs (make-hash-table :test 'equal)))
-       (dolist (conf (magit-git-items "config" "--list" "-z"))
-         (let* ((nl-pos (cl-position ?\n conf))
-                (key (substring conf 0 nl-pos))
-                (val (if nl-pos (substring conf (1+ nl-pos)) "")))
-           (puthash key (nconc (gethash key configs) (list val)) configs)))
-       configs))))
-
-(defun magit-get (&rest keys)
-  "Return the value of the Git variable specified by KEYS."
-  (car (last (apply 'magit-get-all keys))))
-
-(defun magit-get-all (&rest keys)
-  "Return all values of the Git variable specified by KEYS."
-  (let ((magit-git-debug nil)
-        (arg (and (or (null (car keys))
-                      (string-prefix-p "--" (car keys)))
-                  (pop keys)))
-        (key (mapconcat 'identity keys ".")))
-    (if (and magit--refresh-cache (not arg))
-        (magit-config-get-from-cached-list key)
-      (magit-git-items "config" arg "-z" "--get-all" key))))
-
-(defun magit-get-boolean (&rest keys)
-  "Return the boolean value of the Git variable specified by KEYS."
-  (let ((key (mapconcat 'identity keys ".")))
-    (if magit--refresh-cache
-        (equal "true" (car (last (magit-config-get-from-cached-list key))))
-      (equal (magit-git-str "config" "--bool" key) "true"))))
-
-(defun magit-set (value &rest keys)
-  "Set the value of the Git variable specified by KEYS to VALUE."
-  (let ((arg (and (or (null (car keys))
-                      (string-prefix-p "--" (car keys)))
-                  (pop keys)))
-        (key (mapconcat 'identity keys ".")))
-    (if value
-        (magit-git-success "config" arg key value)
-      (magit-git-success "config" arg "--unset" key))
-    value))
-
-(gv-define-setter magit-get (val &rest keys)
-  `(magit-set ,val ,@keys))
-
-(defun magit-set-all (values &rest keys)
-  "Set all values of the Git variable specified by KEYS to VALUES."
-  (let ((arg (and (or (null (car keys))
-                      (string-prefix-p "--" (car keys)))
-                  (pop keys)))
-        (var (mapconcat 'identity keys ".")))
-    (when (magit-get var)
-      (magit-call-git "config" arg "--unset-all" var))
-    (dolist (v values)
-      (magit-call-git "config" arg "--add" var v))))
-
-;;;; Variables in Popups
-
-(defun magit--format-popup-variable:value (variable width &optional global)
-  (concat variable
-          (make-string (max 1 (- width 3 (length variable))) ?\s)
-          (if-let ((value (magit-get (and global "--global") variable)))
-              (propertize value 'face 'magit-popup-option-value)
-            (propertize "unset" 'face 'magit-popup-disabled-argument))))
-
-(defun magit--format-popup-variable:values (variable width &optional global)
-  (concat variable
-          (make-string (max 1 (- width 3 (length variable))) ?\s)
-          (if-let ((values (magit-get-all (and global "--global") variable)))
-              (concat
-               (propertize (car values) 'face 'magit-popup-option-value)
-               (mapconcat
-                (lambda (value)
-                  (concat "\n" (make-string width ?\s)
-                          (propertize value
-                                      'face 'magit-popup-option-value)))
-                (cdr values) ""))
-            (propertize "unset" 'face 'magit-popup-disabled-argument))))
-
-(defun magit--set-popup-variable
-    (variable choices &optional default other)
-  (magit-set (--if-let (magit-git-string "config" "--local" variable)
-                 (cadr (member it choices))
-               (car choices))
-             variable)
-  (magit-with-pre-popup-buffer
-    (magit-refresh))
-  (message "%s %s" variable
-           (magit--format-popup-variable:choices*
-            variable choices default other)))
-
-(defun magit--format-popup-variable:choices
-    (variable choices &optional default other width)
-  (concat variable
-          (if width (make-string (- width (length variable)) ?\s) " ")
-          (magit--format-popup-variable:choices*
-           variable choices default other)))
-
-(defun magit--format-popup-variable:choices*
-    (variable choices &optional default other)
-  (let ((local  (magit-git-string "config" "--local"  variable))
-        (global (magit-git-string "config" "--global" variable)))
-    (when other
-      (setq other (--when-let (magit-get other)
-                    (concat other ":" it))))
-    (concat
-     (propertize "[" 'face 'magit-popup-disabled-argument)
-     (mapconcat
-      (lambda (choice)
-        (propertize choice 'face (if (equal choice local)
-                                     'magit-popup-option-value
-                                   'magit-popup-disabled-argument)))
-      choices
-      (propertize "|" 'face 'magit-popup-disabled-argument))
-     (when (or global other default)
-       (concat
-        (propertize "|" 'face 'magit-popup-disabled-argument)
-        (cond (global
-               (propertize (concat "global:" global)
-                           'face (cond (local
-                                        'magit-popup-disabled-argument)
-                                       ((member global choices)
-                                        'magit-popup-option-value)
-                                       (t
-                                        'font-lock-warning-face))))
-              (other
-               (propertize other
-                           'face (if local
-                                     'magit-popup-disabled-argument
-                                   'magit-popup-option-value)))
-              (default
-               (propertize (concat "default:" default)
-                           'face (if local
-                                     'magit-popup-disabled-argument
-                                   'magit-popup-option-value))))))
-     (propertize "]" 'face 'magit-popup-disabled-argument))))
-
-(provide 'magit-git)
-;;; magit-git.el ends here