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path: root/builtin/worktree.c
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2016-02-22use xmallocz to avoid size arithmeticLibravatar Jeff King1-1/+1
We frequently allocate strings as xmalloc(len + 1), where the extra 1 is for the NUL terminator. This can be done more simply with xmallocz, which also checks for integer overflow. There's no case where switching xmalloc(n+1) to xmallocz(n) is wrong; the result is the same length, and malloc made no guarantees about what was in the buffer anyway. But in some cases, we can stop manually placing NUL at the end of the allocated buffer. But that's only safe if it's clear that the contents will always fill the buffer. In each case where this patch does so, I manually examined the control flow, and I tried to err on the side of caution. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-11-20Convert struct object to object_idLibravatar brian m. carlson1-1/+1
struct object is one of the major data structures dealing with object IDs. Convert it to use struct object_id instead of an unsigned char array. Convert get_object_hash to refer to the new member as well. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-10-26Merge branch 'es/worktree-add'Libravatar Junio C Hamano1-1/+1
* es/worktree-add: worktree: usage: denote <branch> as optional with 'add'
2015-10-18worktree: usage: denote <branch> as optional with 'add'Libravatar Sidhant Sharma1-1/+1
Although 1eb07d8 (worktree: add: auto-vivify new branch when <branch> is omitted, 2015-07-06) updated the documentation when <branch> became optional, it neglected to update the in-code usage message. Fix this oversight. Reported-by: ch3cooli@gmail.com Signed-off-by: Sidhant Sharma <tigerkid001@gmail.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-10-08worktree: add 'list' commandLibravatar Michael Rappazzo1-0/+88
'git worktree list' iterates through the worktree list, and outputs details of the worktree including the path to the worktree, the currently checked out revision and branch, and if the work tree is bare. There is also porcelain format option available. Signed-off-by: Michael Rappazzo <rappazzo@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-31Merge branch 'jc/am-state-fix'Libravatar Junio C Hamano1-5/+5
Recent reimplementation of "git am" changed the format of state files kept in $GIT_DIR/rebase-apply/ without meaning to do so, primarily because write_file() API was cumbersome to use and it was easy to mistakenly make text files with incomplete lines. Update write_file() interface to make it harder to misuse. * jc/am-state-fix: write_file(): drop caller-supplied LF from calls to create a one-liner file write_file_v(): do not leave incomplete line at the end write_file(): drop "fatal" parameter builtin/am: make sure state files are text builtin/am: introduce write_state_*() helper functions
2015-08-25write_file(): drop caller-supplied LF from calls to create a one-liner fileLibravatar Junio C Hamano1-5/+5
All of the callsites covered by this change call write_file() or write_file_gently() to create a one-liner file. Drop the caller supplied LF and let these callees to append it as necessary. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-24write_file(): drop "fatal" parameterLibravatar Junio C Hamano1-5/+5
All callers except three passed 1 for the "fatal" parameter to ask this function to die upon error, but to a casual reader of the code, it was not all obvious what that 1 meant. Instead, split the function into two based on a common write_file_v() that takes the flag, introduce write_file_gently() as a new way to attempt creating a file without dying on error, and make three callers to call it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-12Merge branch 'es/worktree-add-cleanup'Libravatar Junio C Hamano1-40/+83
The "new-worktree-mode" hack in "checkout" that was added in nd/multiple-work-trees topic has been removed by updating the implementation of new "worktree add". * es/worktree-add-cleanup: (25 commits) Documentation/git-worktree: fix duplicated 'from' Documentation/config: mention "now" and "never" for 'expire' settings Documentation/git-worktree: fix broken 'linkgit' invocation checkout: drop intimate knowledge of newly created worktree worktree: populate via "git reset --hard" rather than "git checkout" worktree: avoid resolving HEAD unnecessarily worktree: make setup of new HEAD distinct from worktree population worktree: detect branch-name/detached and error conditions locally worktree: add_worktree: construct worktree-population command locally worktree: elucidate environment variables intended for child processes worktree: make branch creation distinct from worktree population worktree: add: suppress auto-vivication with --detach and no <branch> worktree: make --detach mutually exclusive with -b/-B worktree: introduce options container worktree: simplify new branch (-b/-B) option checking worktree: improve worktree setup message branch: publish die_if_checked_out() checkout: teach check_linked_checkout() about symbolic link HEAD checkout: check_linked_checkout: simplify symref parsing checkout: check_linked_checkout: improve "already checked out" aesthetic ...
2015-07-20worktree: populate via "git reset --hard" rather than "git checkout"Libravatar Eric Sunshine1-2/+1
Now that git-worktree handles all functionality (--force, --detach, -b/-B) previously delegated to git-checkout, actual population of the new worktree can be accomplished more directly and lightweight with "git reset --hard" in place of "git checkout". Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: avoid resolving HEAD unnecessarilyLibravatar Eric Sunshine1-12/+5
Now that git-worktree sets HEAD explicitly to its final value via either git-symbolic-ref or git-update-ref, rather than relying upon git-checkout to do so, the "hack" for pacifying is_git_directory() with a temporary HEAD, though still necessary, can be simplified. Since the real HEAD is now populated with its proper final value, the value of the temporary HEAD truly no longer matters, and any value which looks like an object ID is good enough to satisfy is_git_directory(). Therefore, just set the temporary HEAD to a literal value rather than going through the effort of resolving the current branch's HEAD. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: make setup of new HEAD distinct from worktree populationLibravatar Eric Sunshine1-5/+15
git-worktree currently conflates setting of HEAD in the new worktree and initial worktree population into a single git-checkout invocation which requires git-checkout to have special knowledge that it is operating on a newly created worktree. The eventual goal is to rid git-checkout of that overly-intimate knowledge. Once these operations are separate, git-worktree will no longer be able to delegate to git-branch the setting of the new worktree's HEAD to the desired branch (or commit, if detached). Therefore, make git-worktree itself responsible for setting up HEAD as either a symbolic reference, if associated with a branch, or detached, if not. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: detect branch-name/detached and error conditions locallyLibravatar Eric Sunshine1-0/+18
git-worktree currently conflates setting of HEAD in the new worktree with initial worktree population via a single git-checkout invocation, which requires git-checkout to have special knowledge that it is operating in a newly created worktree. The eventual goal is to separate these operations and rid git-checkout of that overly-intimate knowledge. Once these operations are separate, git-worktree will no longer be able to rely upon git-branch to determine the state of the worktree (branch name or detached), or to check for error conditions, such as the requested branch already checked out elsewhere, or an invalid reference. Therefore, imbue git-worktree with the intelligence to determine a branch name or detached state locally, and to perform error checking on its own. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: add_worktree: construct worktree-population command locallyLibravatar Eric Sunshine1-11/+8
The caller of add_worktree() provides it with a command to invoke to populate the new worktree. This was a useful abstraction during the conversion of "git checkout --to" functionality to "git worktree add" since git-checkout and git-worktree constructed the population command differently. However, now that "git checkout --to" has been retired, and add_worktree() has access to the options given to "worktree add", this extra indirection is no longer useful and makes the code a bit convoluted. Moreover, the eventual goal is for git-worktree to make setting of HEAD and worktree population distinct operations, whereas they are currently conflated into a single git-checkout invocation. As such, add_worktree() will eventually invoke other commands in addition to the worktree population command, so it will be doing command construction itself anyhow. Therefore, relocate construction of the worktree population command from add() to add_worktree(). Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: elucidate environment variables intended for child processesLibravatar Eric Sunshine1-2/+5
Take advantage of 'struct child_process.env' to make it obvious that environment variables set by add_worktree() are intended specifically for sub-commands it invokes to operate in the new worktree. We assign a local 'struct argv_array' to child_process.env, rather than utilizing the child_process.env_array 'struct argv_array', because future patches will make add_worktree() invoke additional sub-commands, and it's simpler to populate the environment array just once, whereas child_process.env_array gets cleared after each invocation, thus would require re-population for each sub-command. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: make branch creation distinct from worktree populationLibravatar Eric Sunshine1-3/+14
git-worktree currently conflates branch creation, setting of HEAD in the new worktree, and worktree population into a single sub-invocation of git-checkout, which requires git-checkout to be specially aware that it is operating in a newly-created worktree. The goal is to free git-checkout of that special knowledge, and to do so, git-worktree will eventually perform those operations separately. Thus, as a first step, rather than piggybacking on git-checkout's -b/-B ability to create a new branch at checkout time, make git-worktree responsible for branch creation itself. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: add: suppress auto-vivication with --detach and no <branch>Libravatar Eric Sunshine1-1/+1
Fix oversight where branch auto-vivication incorrectly kicks in when --detach is specified and <branch> omitted. Instead, treat: git worktree add --detach <path> as shorthand for: git worktree add --detach <path> HEAD Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: make --detach mutually exclusive with -b/-BLibravatar Eric Sunshine1-2/+2
Be consistent with git-checkout which disallows this (not particularly meaningful) combination. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: introduce options containerLibravatar Eric Sunshine1-18/+27
add_worktree() will eventually need to deal with some options itself, so introduce a structure into which options can be conveniently bundled, and pass it along to add_worktree(). Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: simplify new branch (-b/-B) option checkingLibravatar Eric Sunshine1-5/+8
Make 'new_branch' be the name of the new branch for both forced and non-forced cases; and add boolean 'force_new_branch' to indicate forced branch creation. This will simplify logic later on when git-worktree handles branch creation locally rather than delegating it to git-checkout as part of the worktree population phase. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-20worktree: improve worktree setup messageLibravatar Eric Sunshine1-1/+1
When git-worktree creates a new worktree, it reports: Enter "<path>" (identifier <tag>) which misleadingly implies that it is setting <path> as the working directory (as if "cd <path>" had been invoked), whereas it's actually preparing the new worktree by creating its administrative files, setting HEAD, and populating it. Make this more clear by instead saying: Preparing "<path>" (identifier <tag>) Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-13Merge branch 'es/worktree-add'Libravatar Junio C Hamano1-0/+199
Update to the "linked checkout" in 2.5.0-rc1. Instead of "checkout --to" that does not do what "checkout" normally does, move the functionality to "git worktree add". * es/worktree-add: (24 commits) Revert "checkout: retire --ignore-other-worktrees in favor of --force" checkout: retire --ignore-other-worktrees in favor of --force worktree: add: auto-vivify new branch when <branch> is omitted worktree: add: make -b/-B default to HEAD when <branch> is omitted worktree: extract basename computation to new function checkout: require worktree unconditionally checkout: retire --to option tests: worktree: retrofit "checkout --to" tests for "worktree add" worktree: add -b/-B options worktree: add --detach option worktree: add --force option worktree: introduce "add" command checkout: drop 'checkout_opts' dependency from prepare_linked_checkout checkout: make --to unconditionally verbose checkout: prepare_linked_checkout: drop now-unused 'new' argument checkout: relocate --to's "no branch specified" check checkout: fix bug with --to and relative HEAD Documentation/git-worktree: add EXAMPLES section Documentation/git-worktree: add high-level 'lock' overview Documentation/git-worktree: split technical info from general description ...
2015-07-12Revert "checkout: retire --ignore-other-worktrees in favor of --force"Libravatar Junio C Hamano1-1/+1
This reverts commit 0d1a1517835a10818f2d40d8780a268dbb5e20ce. When trying to switch to a different branch, that happens to be checked out in another working tree, the user shouldn't have to give up the other safety measures (like protecting the local changes that overlap the difference between the branches) while defeating the "no two checkouts of the same branch" safety. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-07checkout: retire --ignore-other-worktrees in favor of --forceLibravatar Eric Sunshine1-1/+1
As a safeguard, checking out a branch already checked out by a different worktree is disallowed. This behavior can be overridden with --ignore-other-worktrees, however, this option is neither obvious nor particularly discoverable. As a common safeguard override, --force is more likely to come to mind. Therefore, overload it to also suppress the check for a branch already checked out elsewhere. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-07worktree: add: auto-vivify new branch when <branch> is omittedLibravatar Eric Sunshine1-2/+6
As a convenience, when <branch> is omitted from "git worktree <path> <branch>" and neither -b nor -B is used, automatically create a new branch named after <path>, as if "-b $(basename <path>)" was specified. Thus, "git worktree add ../hotfix" creates a new branch named "hotfix" and associates it with new worktree "../hotfix". Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06worktree: add: make -b/-B default to HEAD when <branch> is omittedLibravatar Eric Sunshine1-2/+4
As a convenience, like "git branch" and "git checkout -b", make "git worktree add -b <newbranch> <path> <branch>" default to HEAD when <branch> is omitted. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06worktree: extract basename computation to new functionLibravatar Eric Sunshine1-9/+20
A subsequent patch will also need to compute the basename of the new worktree, so factor out this logic into a new function. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06checkout: retire --to optionLibravatar Eric Sunshine1-6/+138
Now that "git worktree add" has achieved user-facing feature-parity with "git checkout --to", retire the latter. Move the actual linked worktree creation functionality, prepare_linked_checkout() and its helpers, verbatim from checkout.c to worktree.c. This effectively reverts changes to checkout.c by 529fef2 (checkout: support checking out into a new working directory, 2014-11-30) with the exception of merge_working_tree() and switch_branches() which still require specialized knowledge that a the checkout is occurring in a newly-created linked worktree (signaled to them by the private GIT_CHECKOUT_NEW_WORKTREE environment variable). Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06worktree: add -b/-B optionsLibravatar Eric Sunshine1-0/+11
One of git-worktree's roles is to populate the new worktree, much like git-checkout, and thus, for convenience, ought to support several of the same shortcuts. Toward this goal, add -b/-B options to create a new branch and check it out in the new worktree. (For brevity, only -b is mentioned in the synopsis; -B is omitted.) Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06worktree: add --detach optionLibravatar Eric Sunshine1-1/+4
One of git-worktree's roles is to populate the new worktree, much like git-checkout, and thus, for convenience, ought to support several of the same shortcuts. Toward this goal, add a --detach option to detach HEAD in the new worktree. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06worktree: add --force optionLibravatar Eric Sunshine1-1/+5
By default, "git worktree add" refuses to create a new worktree when the requested branch is already checked out elsewhere. Add a --force option to override this safeguard. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-06worktree: introduce "add" commandLibravatar Eric Sunshine1-0/+31
The plan is to relocate "git checkout --to" functionality to "git worktree add". As a first step, introduce a bare-bones git-worktree "add" command along with documentation. At this stage, "git worktree add" merely invokes "git checkout --to" behind the scenes, but an upcoming patch will move the actual functionality (checkout.c:prepare_linked_checkout() and its helpers) to worktree.c. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-06-29worktree: new place for "git prune --worktrees"Libravatar Nguyễn Thái Ngọc Duy1-0/+133
Commit 23af91d (prune: strategies for linked checkouts - 2014-11-30) adds "--worktrees" to "git prune" without realizing that "git prune" is for object database only. This patch moves the same functionality to a new command "git worktree". Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>