merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 102 insertions, 45 deletions

diff --git a/third_party/git/Documentation/git-stash.txt b/third_party/git/Documentation/git-stash.txt
index 8fbe12c66c82..31f1beb65baf 100644
--- a/third_party/git/Documentation/git-stash.txt
+++ b/third_party/git/Documentation/git-stash.txt
@@ -15,6 +15,7 @@ SYNOPSIS
 'git stash' branch <branchname> [<stash>]
 'git stash' [push [-p|--patch] [-k|--[no-]keep-index] [-q|--quiet]
 	     [-u|--include-untracked] [-a|--all] [-m|--message <message>]
+	     [--pathspec-from-file=<file> [--pathspec-file-nul]]
 	     [--] [<pathspec>...]]
 'git stash' clear
 'git stash' create [<message>]
@@ -43,10 +44,10 @@ created stash, `stash@{1}` is the one before it, `stash@{2.hours.ago}`
 is also possible). Stashes may also be referenced by specifying just the
 stash index (e.g. the integer `n` is equivalent to `stash@{n}`).
 
-OPTIONS
--------
+COMMANDS
+--------
 
-push [-p|--patch] [-k|--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q|--quiet] [-m|--message <message>] [--] [<pathspec>...]::
+push [-p|--patch] [-k|--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q|--quiet] [-m|--message <message>] [--pathspec-from-file=<file> [--pathspec-file-nul]] [--] [<pathspec>...]::
 
 	Save your local modifications to a new 'stash entry' and roll them
 	back to HEAD (in the working tree and in the index).
@@ -56,39 +57,15 @@ push [-p|--patch] [-k|--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q
 For quickly making a snapshot, you can omit "push".  In this mode,
 non-option arguments are not allowed to prevent a misspelled
 subcommand from making an unwanted stash entry.  The two exceptions to this
-are `stash -p` which acts as alias for `stash push -p` and pathspecs,
+are `stash -p` which acts as alias for `stash push -p` and pathspec elements,
 which are allowed after a double hyphen `--` for disambiguation.
-+
-When pathspec is given to 'git stash push', the new stash entry records the
-modified states only for the files that match the pathspec.  The index
-entries and working tree files are then rolled back to the state in
-HEAD only for these files, too, leaving files that do not match the
-pathspec intact.
-+
-If the `--keep-index` option is used, all changes already added to the
-index are left intact.
-+
-If the `--include-untracked` option is used, all untracked files are also
-stashed and then cleaned up with `git clean`, leaving the working directory
-in a very clean state. If the `--all` option is used instead then the
-ignored files are stashed and cleaned in addition to the untracked files.
-+
-With `--patch`, you can interactively select hunks from the diff
-between HEAD and the working tree to be stashed.  The stash entry is
-constructed such that its index state is the same as the index state
-of your repository, and its worktree contains only the changes you
-selected interactively.  The selected changes are then rolled back
-from your worktree. See the ``Interactive Mode'' section of
-linkgit:git-add[1] to learn how to operate the `--patch` mode.
-+
-The `--patch` option implies `--keep-index`.  You can use
-`--no-keep-index` to override this.
 
 save [-p|--patch] [-k|--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q|--quiet] [<message>]::
 
 	This option is deprecated in favour of 'git stash push'.  It
-	differs from "stash push" in that it cannot take pathspecs,
-	and any non-option arguments form the message.
+	differs from "stash push" in that it cannot take pathspec.
+	Instead, all non-option arguments are concatenated to form the stash
+	message.
 
 list [<options>]::
 
@@ -110,7 +87,7 @@ show [<options>] [<stash>]::
 
 	Show the changes recorded in the stash entry as a diff between the
 	stashed contents and the commit back when the stash entry was first
-	created. When no `<stash>` is given, it shows the latest one.
+	created.
 	By default, the command shows the diffstat, but it will accept any
 	format known to 'git diff' (e.g., `git stash show -p stash@{1}`
 	to view the second most recent entry in patch form).
@@ -127,14 +104,6 @@ pop [--index] [-q|--quiet] [<stash>]::
 Applying the state can fail with conflicts; in this case, it is not
 removed from the stash list. You need to resolve the conflicts by hand
 and call `git stash drop` manually afterwards.
-+
-If the `--index` option is used, then tries to reinstate not only the working
-tree's changes, but also the index's ones. However, this can fail, when you
-have conflicts (which are stored in the index, where you therefore can no
-longer apply the changes as they were originally).
-+
-When no `<stash>` is given, `stash@{0}` is assumed, otherwise `<stash>` must
-be a reference of the form `stash@{<revision>}`.
 
 apply [--index] [-q|--quiet] [<stash>]::
 
@@ -148,8 +117,7 @@ branch <branchname> [<stash>]::
 	the commit at which the `<stash>` was originally created, applies the
 	changes recorded in `<stash>` to the new working tree and index.
 	If that succeeds, and `<stash>` is a reference of the form
-	`stash@{<revision>}`, it then drops the `<stash>`. When no `<stash>`
-	is given, applies the latest one.
+	`stash@{<revision>}`, it then drops the `<stash>`.
 +
 This is useful if the branch on which you ran `git stash push` has
 changed enough that `git stash apply` fails due to conflicts. Since
@@ -165,9 +133,6 @@ clear::
 drop [-q|--quiet] [<stash>]::
 
 	Remove a single stash entry from the list of stash entries.
-	When no `<stash>` is given, it removes the latest one.
-	i.e. `stash@{0}`, otherwise `<stash>` must be a valid stash
-	log reference of the form `stash@{<revision>}`.
 
 create::
 
@@ -184,6 +149,98 @@ store::
 	reflog.  This is intended to be useful for scripts.  It is
 	probably not the command you want to use; see "push" above.
 
+OPTIONS
+-------
+-a::
+--all::
+	This option is only valid for `push` and `save` commands.
++
+All ignored and untracked files are also stashed and then cleaned
+up with `git clean`.
+
+-u::
+--include-untracked::
+	This option is only valid for `push` and `save` commands.
++
+All untracked files are also stashed and then cleaned up with
+`git clean`.
+
+--index::
+	This option is only valid for `pop` and `apply` commands.
++
+Tries to reinstate not only the working tree's changes, but also
+the index's ones. However, this can fail, when you have conflicts
+(which are stored in the index, where you therefore can no longer
+apply the changes as they were originally).
+
+-k::
+--keep-index::
+--no-keep-index::
+	This option is only valid for `push` and `save` commands.
++
+All changes already added to the index are left intact.
+
+-p::
+--patch::
+	This option is only valid for `push` and `save` commands.
++
+Interactively select hunks from the diff between HEAD and the
+working tree to be stashed.  The stash entry is constructed such
+that its index state is the same as the index state of your
+repository, and its worktree contains only the changes you selected
+interactively.  The selected changes are then rolled back from your
+worktree. See the ``Interactive Mode'' section of linkgit:git-add[1]
+to learn how to operate the `--patch` mode.
++
+The `--patch` option implies `--keep-index`.  You can use
+`--no-keep-index` to override this.
+
+--pathspec-from-file=<file>::
+	This option is only valid for `push` command.
++
+Pathspec is passed in `<file>` instead of commandline args. If
+`<file>` is exactly `-` then standard input is used. Pathspec
+elements are separated by LF or CR/LF. Pathspec elements can be
+quoted as explained for the configuration variable `core.quotePath`
+(see linkgit:git-config[1]). See also `--pathspec-file-nul` and
+global `--literal-pathspecs`.
+
+--pathspec-file-nul::
+	This option is only valid for `push` command.
++
+Only meaningful with `--pathspec-from-file`. Pathspec elements are
+separated with NUL character and all other characters are taken
+literally (including newlines and quotes).
+
+-q::
+--quiet::
+	This option is only valid for `apply`, `drop`, `pop`, `push`,
+	`save`, `store` commands.
++
+Quiet, suppress feedback messages.
+
+\--::
+	This option is only valid for `push` command.
++
+Separates pathspec from options for disambiguation purposes.
+
+<pathspec>...::
+	This option is only valid for `push` command.
++
+The new stash entry records the modified states only for the files
+that match the pathspec.  The index entries and working tree files
+are then rolled back to the state in HEAD only for these files,
+too, leaving files that do not match the pathspec intact.
++
+For more details, see the 'pathspec' entry in linkgit:gitglossary[7].
+
+<stash>::
+	This option is only valid for `apply`, `branch`, `drop`, `pop`,
+	`show` commands.
++
+A reference of the form `stash@{<revision>}`. When no `<stash>` is
+given, the latest stash is assumed (that is, `stash@{0}`).
+
 DISCUSSION
 ----------