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diff --git a/third_party/git/Documentation/git-checkout.txt b/third_party/git/Documentation/git-checkout.txt deleted file mode 100644 index afa5c11fd3c4..000000000000 --- a/third_party/git/Documentation/git-checkout.txt +++ /dev/null @@ -1,603 +0,0 @@ -git-checkout(1) -=============== - -NAME ----- -git-checkout - Switch branches or restore working tree files - -SYNOPSIS --------- -[verse] -'git checkout' [-q] [-f] [-m] [<branch>] -'git checkout' [-q] [-f] [-m] --detach [<branch>] -'git checkout' [-q] [-f] [-m] [--detach] <commit> -'git checkout' [-q] [-f] [-m] [[-b|-B|--orphan] <new_branch>] [<start_point>] -'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <pathspec>... -'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] --pathspec-from-file=<file> [--pathspec-file-nul] -'git checkout' (-p|--patch) [<tree-ish>] [--] [<pathspec>...] - -DESCRIPTION ------------ -Updates files in the working tree to match the version in the index -or the specified tree. If no pathspec was given, 'git checkout' will -also update `HEAD` to set the specified branch as the current -branch. - -'git checkout' [<branch>]:: - To prepare for working on `<branch>`, switch to it by updating - the index and the files in the working tree, and by pointing - `HEAD` at the branch. Local modifications to the files in the - working tree are kept, so that they can be committed to the - `<branch>`. -+ -If `<branch>` is not found but there does exist a tracking branch in -exactly one remote (call it `<remote>`) with a matching name and -`--no-guess` is not specified, treat as equivalent to -+ ------------- -$ git checkout -b <branch> --track <remote>/<branch> ------------- -+ -You could omit `<branch>`, in which case the command degenerates to -"check out the current branch", which is a glorified no-op with -rather expensive side-effects to show only the tracking information, -if exists, for the current branch. - -'git checkout' -b|-B <new_branch> [<start point>]:: - - Specifying `-b` causes a new branch to be created as if - linkgit:git-branch[1] were called and then checked out. In - this case you can use the `--track` or `--no-track` options, - which will be passed to 'git branch'. As a convenience, - `--track` without `-b` implies branch creation; see the - description of `--track` below. -+ -If `-B` is given, `<new_branch>` is created if it doesn't exist; otherwise, it -is reset. This is the transactional equivalent of -+ ------------- -$ git branch -f <branch> [<start point>] -$ git checkout <branch> ------------- -+ -that is to say, the branch is not reset/created unless "git checkout" is -successful. - -'git checkout' --detach [<branch>]:: -'git checkout' [--detach] <commit>:: - - Prepare to work on top of `<commit>`, by detaching `HEAD` at it - (see "DETACHED HEAD" section), and updating the index and the - files in the working tree. Local modifications to the files - in the working tree are kept, so that the resulting working - tree will be the state recorded in the commit plus the local - modifications. -+ -When the `<commit>` argument is a branch name, the `--detach` option can -be used to detach `HEAD` at the tip of the branch (`git checkout -<branch>` would check out that branch without detaching `HEAD`). -+ -Omitting `<branch>` detaches `HEAD` at the tip of the current branch. - -'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <pathspec>...:: -'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] --pathspec-from-file=<file> [--pathspec-file-nul]:: - - Overwrite the contents of the files that match the pathspec. - When the `<tree-ish>` (most often a commit) is not given, - overwrite working tree with the contents in the index. - When the `<tree-ish>` is given, overwrite both the index and - the working tree with the contents at the `<tree-ish>`. -+ -The index may contain unmerged entries because of a previous failed merge. -By default, if you try to check out such an entry from the index, the -checkout operation will fail and nothing will be checked out. -Using `-f` will ignore these unmerged entries. The contents from a -specific side of the merge can be checked out of the index by -using `--ours` or `--theirs`. With `-m`, changes made to the working tree -file can be discarded to re-create the original conflicted merge result. - -'git checkout' (-p|--patch) [<tree-ish>] [--] [<pathspec>...]:: - This is similar to the previous mode, but lets you use the - interactive interface to show the "diff" output and choose which - hunks to use in the result. See below for the description of - `--patch` option. - -OPTIONS -------- --q:: ---quiet:: - Quiet, suppress feedback messages. - ---progress:: ---no-progress:: - Progress status is reported on the standard error stream - by default when it is attached to a terminal, unless `--quiet` - is specified. This flag enables progress reporting even if not - attached to a terminal, regardless of `--quiet`. - --f:: ---force:: - When switching branches, proceed even if the index or the - working tree differs from `HEAD`. This is used to throw away - local changes. -+ -When checking out paths from the index, do not fail upon unmerged -entries; instead, unmerged entries are ignored. - ---ours:: ---theirs:: - When checking out paths from the index, check out stage #2 - ('ours') or #3 ('theirs') for unmerged paths. -+ -Note that during `git rebase` and `git pull --rebase`, 'ours' and -'theirs' may appear swapped; `--ours` gives the version from the -branch the changes are rebased onto, while `--theirs` gives the -version from the branch that holds your work that is being rebased. -+ -This is because `rebase` is used in a workflow that treats the -history at the remote as the shared canonical one, and treats the -work done on the branch you are rebasing as the third-party work to -be integrated, and you are temporarily assuming the role of the -keeper of the canonical history during the rebase. As the keeper of -the canonical history, you need to view the history from the remote -as `ours` (i.e. "our shared canonical history"), while what you did -on your side branch as `theirs` (i.e. "one contributor's work on top -of it"). - --b <new_branch>:: - Create a new branch named `<new_branch>` and start it at - `<start_point>`; see linkgit:git-branch[1] for details. - --B <new_branch>:: - Creates the branch `<new_branch>` and start it at `<start_point>`; - if it already exists, then reset it to `<start_point>`. This is - equivalent to running "git branch" with "-f"; see - linkgit:git-branch[1] for details. - --t:: ---track:: - When creating a new branch, set up "upstream" configuration. See - "--track" in linkgit:git-branch[1] for details. -+ -If no `-b` option is given, the name of the new branch will be -derived from the remote-tracking branch, by looking at the local part of -the refspec configured for the corresponding remote, and then stripping -the initial part up to the "*". -This would tell us to use `hack` as the local branch when branching -off of `origin/hack` (or `remotes/origin/hack`, or even -`refs/remotes/origin/hack`). If the given name has no slash, or the above -guessing results in an empty name, the guessing is aborted. You can -explicitly give a name with `-b` in such a case. - ---no-track:: - Do not set up "upstream" configuration, even if the - `branch.autoSetupMerge` configuration variable is true. - ---guess:: ---no-guess:: - If `<branch>` is not found but there does exist a tracking - branch in exactly one remote (call it `<remote>`) with a - matching name, treat as equivalent to -+ ------------- -$ git checkout -b <branch> --track <remote>/<branch> ------------- -+ -If the branch exists in multiple remotes and one of them is named by -the `checkout.defaultRemote` configuration variable, we'll use that -one for the purposes of disambiguation, even if the `<branch>` isn't -unique across all remotes. Set it to -e.g. `checkout.defaultRemote=origin` to always checkout remote -branches from there if `<branch>` is ambiguous but exists on the -'origin' remote. See also `checkout.defaultRemote` in -linkgit:git-config[1]. -+ -Use `--no-guess` to disable this. - --l:: - Create the new branch's reflog; see linkgit:git-branch[1] for - details. - --d:: ---detach:: - Rather than checking out a branch to work on it, check out a - commit for inspection and discardable experiments. - This is the default behavior of `git checkout <commit>` when - `<commit>` is not a branch name. See the "DETACHED HEAD" section - below for details. - ---orphan <new_branch>:: - Create a new 'orphan' branch, named `<new_branch>`, started from - `<start_point>` and switch to it. The first commit made on this - new branch will have no parents and it will be the root of a new - history totally disconnected from all the other branches and - commits. -+ -The index and the working tree are adjusted as if you had previously run -`git checkout <start_point>`. This allows you to start a new history -that records a set of paths similar to `<start_point>` by easily running -`git commit -a` to make the root commit. -+ -This can be useful when you want to publish the tree from a commit -without exposing its full history. You might want to do this to publish -an open source branch of a project whose current tree is "clean", but -whose full history contains proprietary or otherwise encumbered bits of -code. -+ -If you want to start a disconnected history that records a set of paths -that is totally different from the one of `<start_point>`, then you should -clear the index and the working tree right after creating the orphan -branch by running `git rm -rf .` from the top level of the working tree. -Afterwards you will be ready to prepare your new files, repopulating the -working tree, by copying them from elsewhere, extracting a tarball, etc. - ---ignore-skip-worktree-bits:: - In sparse checkout mode, `git checkout -- <paths>` would - update only entries matched by `<paths>` and sparse patterns - in `$GIT_DIR/info/sparse-checkout`. This option ignores - the sparse patterns and adds back any files in `<paths>`. - --m:: ---merge:: - When switching branches, - if you have local modifications to one or more files that - are different between the current branch and the branch to - which you are switching, the command refuses to switch - branches in order to preserve your modifications in context. - However, with this option, a three-way merge between the current - branch, your working tree contents, and the new branch - is done, and you will be on the new branch. -+ -When a merge conflict happens, the index entries for conflicting -paths are left unmerged, and you need to resolve the conflicts -and mark the resolved paths with `git add` (or `git rm` if the merge -should result in deletion of the path). -+ -When checking out paths from the index, this option lets you recreate -the conflicted merge in the specified paths. -+ -When switching branches with `--merge`, staged changes may be lost. - ---conflict=<style>:: - The same as `--merge` option above, but changes the way the - conflicting hunks are presented, overriding the - `merge.conflictStyle` configuration variable. Possible values are - "merge" (default) and "diff3" (in addition to what is shown by - "merge" style, shows the original contents). - --p:: ---patch:: - Interactively select hunks in the difference between the - `<tree-ish>` (or the index, if unspecified) and the working - tree. The chosen hunks are then applied in reverse to the - working tree (and if a `<tree-ish>` was specified, the index). -+ -This means that you can use `git checkout -p` to selectively discard -edits from your current working tree. See the ``Interactive Mode'' -section of linkgit:git-add[1] to learn how to operate the `--patch` mode. -+ -Note that this option uses the no overlay mode by default (see also -`--overlay`), and currently doesn't support overlay mode. - ---ignore-other-worktrees:: - `git checkout` refuses when the wanted ref is already checked - out by another worktree. This option makes it check the ref - out anyway. In other words, the ref can be held by more than one - worktree. - ---overwrite-ignore:: ---no-overwrite-ignore:: - Silently overwrite ignored files when switching branches. This - is the default behavior. Use `--no-overwrite-ignore` to abort - the operation when the new branch contains ignored files. - ---recurse-submodules:: ---no-recurse-submodules:: - Using `--recurse-submodules` will update the content of all active - submodules according to the commit recorded in the superproject. If - local modifications in a submodule would be overwritten the checkout - will fail unless `-f` is used. If nothing (or `--no-recurse-submodules`) - is used, submodules working trees will not be updated. - Just like linkgit:git-submodule[1], this will detach `HEAD` of the - submodule. - ---overlay:: ---no-overlay:: - In the default overlay mode, `git checkout` never - removes files from the index or the working tree. When - specifying `--no-overlay`, files that appear in the index and - working tree, but not in `<tree-ish>` are removed, to make them - match `<tree-ish>` exactly. - ---pathspec-from-file=<file>:: - 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:: - Only meaningful with `--pathspec-from-file`. Pathspec elements are - separated with NUL character and all other characters are taken - literally (including newlines and quotes). - -<branch>:: - Branch to checkout; if it refers to a branch (i.e., a name that, - when prepended with "refs/heads/", is a valid ref), then that - branch is checked out. Otherwise, if it refers to a valid - commit, your `HEAD` becomes "detached" and you are no longer on - any branch (see below for details). -+ -You can use the `@{-N}` syntax to refer to the N-th last -branch/commit checked out using "git checkout" operation. You may -also specify `-` which is synonymous to `@{-1}`. -+ -As a special case, you may use `A...B` as a shortcut for the -merge base of `A` and `B` if there is exactly one merge base. You can -leave out at most one of `A` and `B`, in which case it defaults to `HEAD`. - -<new_branch>:: - Name for the new branch. - -<start_point>:: - The name of a commit at which to start the new branch; see - linkgit:git-branch[1] for details. Defaults to `HEAD`. -+ -As a special case, you may use `"A...B"` as a shortcut for the -merge base of `A` and `B` if there is exactly one merge base. You can -leave out at most one of `A` and `B`, in which case it defaults to `HEAD`. - -<tree-ish>:: - Tree to checkout from (when paths are given). If not specified, - the index will be used. - -\--:: - Do not interpret any more arguments as options. - -<pathspec>...:: - Limits the paths affected by the operation. -+ -For more details, see the 'pathspec' entry in linkgit:gitglossary[7]. - -DETACHED HEAD -------------- -`HEAD` normally refers to a named branch (e.g. `master`). Meanwhile, each -branch refers to a specific commit. Let's look at a repo with three -commits, one of them tagged, and with branch `master` checked out: - ------------- - HEAD (refers to branch 'master') - | - v -a---b---c branch 'master' (refers to commit 'c') - ^ - | - tag 'v2.0' (refers to commit 'b') ------------- - -When a commit is created in this state, the branch is updated to refer to -the new commit. Specifically, 'git commit' creates a new commit `d`, whose -parent is commit `c`, and then updates branch `master` to refer to new -commit `d`. `HEAD` still refers to branch `master` and so indirectly now refers -to commit `d`: - ------------- -$ edit; git add; git commit - - HEAD (refers to branch 'master') - | - v -a---b---c---d branch 'master' (refers to commit 'd') - ^ - | - tag 'v2.0' (refers to commit 'b') ------------- - -It is sometimes useful to be able to checkout a commit that is not at -the tip of any named branch, or even to create a new commit that is not -referenced by a named branch. Let's look at what happens when we -checkout commit `b` (here we show two ways this may be done): - ------------- -$ git checkout v2.0 # or -$ git checkout master^^ - - HEAD (refers to commit 'b') - | - v -a---b---c---d branch 'master' (refers to commit 'd') - ^ - | - tag 'v2.0' (refers to commit 'b') ------------- - -Notice that regardless of which checkout command we use, `HEAD` now refers -directly to commit `b`. This is known as being in detached `HEAD` state. -It means simply that `HEAD` refers to a specific commit, as opposed to -referring to a named branch. Let's see what happens when we create a commit: - ------------- -$ edit; git add; git commit - - HEAD (refers to commit 'e') - | - v - e - / -a---b---c---d branch 'master' (refers to commit 'd') - ^ - | - tag 'v2.0' (refers to commit 'b') ------------- - -There is now a new commit `e`, but it is referenced only by `HEAD`. We can -of course add yet another commit in this state: - ------------- -$ edit; git add; git commit - - HEAD (refers to commit 'f') - | - v - e---f - / -a---b---c---d branch 'master' (refers to commit 'd') - ^ - | - tag 'v2.0' (refers to commit 'b') ------------- - -In fact, we can perform all the normal Git operations. But, let's look -at what happens when we then checkout `master`: - ------------- -$ git checkout master - - HEAD (refers to branch 'master') - e---f | - / v -a---b---c---d branch 'master' (refers to commit 'd') - ^ - | - tag 'v2.0' (refers to commit 'b') ------------- - -It is important to realize that at this point nothing refers to commit -`f`. Eventually commit `f` (and by extension commit `e`) will be deleted -by the routine Git garbage collection process, unless we create a reference -before that happens. If we have not yet moved away from commit `f`, -any of these will create a reference to it: - ------------- -$ git checkout -b foo <1> -$ git branch foo <2> -$ git tag foo <3> ------------- - -<1> creates a new branch `foo`, which refers to commit `f`, and then - updates `HEAD` to refer to branch `foo`. In other words, we'll no longer - be in detached `HEAD` state after this command. - -<2> similarly creates a new branch `foo`, which refers to commit `f`, - but leaves `HEAD` detached. - -<3> creates a new tag `foo`, which refers to commit `f`, - leaving `HEAD` detached. - -If we have moved away from commit `f`, then we must first recover its object -name (typically by using git reflog), and then we can create a reference to -it. For example, to see the last two commits to which `HEAD` referred, we -can use either of these commands: - ------------- -$ git reflog -2 HEAD # or -$ git log -g -2 HEAD ------------- - -ARGUMENT DISAMBIGUATION ------------------------ - -When there is only one argument given and it is not `--` (e.g. `git -checkout abc`), and when the argument is both a valid `<tree-ish>` -(e.g. a branch `abc` exists) and a valid `<pathspec>` (e.g. a file -or a directory whose name is "abc" exists), Git would usually ask -you to disambiguate. Because checking out a branch is so common an -operation, however, `git checkout abc` takes "abc" as a `<tree-ish>` -in such a situation. Use `git checkout -- <pathspec>` if you want -to checkout these paths out of the index. - -EXAMPLES --------- - -. The following sequence checks out the `master` branch, reverts - the `Makefile` to two revisions back, deletes `hello.c` by - mistake, and gets it back from the index. -+ ------------- -$ git checkout master <1> -$ git checkout master~2 Makefile <2> -$ rm -f hello.c -$ git checkout hello.c <3> ------------- -+ -<1> switch branch -<2> take a file out of another commit -<3> restore `hello.c` from the index -+ -If you want to check out _all_ C source files out of the index, -you can say -+ ------------- -$ git checkout -- '*.c' ------------- -+ -Note the quotes around `*.c`. The file `hello.c` will also be -checked out, even though it is no longer in the working tree, -because the file globbing is used to match entries in the index -(not in the working tree by the shell). -+ -If you have an unfortunate branch that is named `hello.c`, this -step would be confused as an instruction to switch to that branch. -You should instead write: -+ ------------- -$ git checkout -- hello.c ------------- - -. After working in the wrong branch, switching to the correct - branch would be done using: -+ ------------- -$ git checkout mytopic ------------- -+ -However, your "wrong" branch and correct `mytopic` branch may -differ in files that you have modified locally, in which case -the above checkout would fail like this: -+ ------------- -$ git checkout mytopic -error: You have local changes to 'frotz'; not switching branches. ------------- -+ -You can give the `-m` flag to the command, which would try a -three-way merge: -+ ------------- -$ git checkout -m mytopic -Auto-merging frotz ------------- -+ -After this three-way merge, the local modifications are _not_ -registered in your index file, so `git diff` would show you what -changes you made since the tip of the new branch. - -. When a merge conflict happens during switching branches with - the `-m` option, you would see something like this: -+ ------------- -$ git checkout -m mytopic -Auto-merging frotz -ERROR: Merge conflict in frotz -fatal: merge program failed ------------- -+ -At this point, `git diff` shows the changes cleanly merged as in -the previous example, as well as the changes in the conflicted -files. Edit and resolve the conflict and mark it resolved with -`git add` as usual: -+ ------------- -$ edit frotz -$ git add frotz ------------- - -SEE ALSO --------- -linkgit:git-switch[1], -linkgit:git-restore[1] - -GIT ---- -Part of the linkgit:git[1] suite |