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2020-06-25Merge branch 'dl/branch-cleanup'Libravatar Junio C Hamano2-25/+44
Code clean-up around "git branch" with a minor bugfix. * dl/branch-cleanup: branch: don't mix --edit-description t3200: test for specific errors t3200: rename "expected" to "expect"
2020-06-25Merge branch 'cc/upload-pack-data-3'Libravatar Junio C Hamano1-162/+125
Code clean-up in the codepath that serves "git fetch" continues. * cc/upload-pack-data-3: upload-pack: refactor common code into do_got_oid() upload-pack: move oldest_have to upload_pack_data upload-pack: pass upload_pack_data to got_oid() upload-pack: pass upload_pack_data to ok_to_give_up() upload-pack: pass upload_pack_data to send_acks() upload-pack: pass upload_pack_data to process_haves() upload-pack: change allow_unadvertised_object_request to an enum upload-pack: move allow_unadvertised_object_request to upload_pack_data upload-pack: move extra_edge_obj to upload_pack_data upload-pack: move shallow_nr to upload_pack_data upload-pack: pass upload_pack_data to send_unshallow() upload-pack: pass upload_pack_data to deepen_by_rev_list() upload-pack: pass upload_pack_data to deepen() upload-pack: pass upload_pack_data to send_shallow_list()
2020-06-25Merge branch 'ct/diff-with-merge-base-clarification'Libravatar Junio C Hamano4-19/+226
"git diff" used to take arguments in random and nonsense range notation, e.g. "git diff A..B C", "git diff A..B C...D", etc., which has been cleaned up. * ct/diff-with-merge-base-clarification: Documentation: usage for diff combined commits git diff: improve range handling t/t3430: avoid undefined git diff behavior
2020-06-25Merge branch 'en/clean-cleanups'Libravatar Junio C Hamano2-16/+48
Code clean-up of "git clean" resulted in a fix of recent performance regression. * en/clean-cleanups: clean: optimize and document cases where we recurse into subdirectories clean: consolidate handling of ignored parameters dir, clean: avoid disallowed behavior dir: fix a few confusing comments
2020-06-25Merge branch 'jk/complete-git-switch'Libravatar Junio C Hamano2-39/+668
The command line completion (in contrib/) learned to complete options that the "git switch" command takes. * jk/complete-git-switch: completion: improve handling of --orphan option of switch/checkout completion: improve handling of -c/-C and -b/-B in switch/checkout completion: improve handling of --track in switch/checkout completion: improve handling of --detach in checkout completion: improve completion for git switch with no options completion: improve handling of DWIM mode for switch/checkout completion: perform DWIM logic directly in __git_complete_refs completion: extract function __git_dwim_remote_heads completion: replace overloaded track term for __git_complete_refs completion: add tests showing subpar switch/checkout --orphan logic completion: add tests showing subpar -c/C argument completion completion: add tests showing subpar -c/-C startpoint completion completion: add tests showing subpar switch/checkout --track logic completion: add tests showing subar checkout --detach logic completion: add tests showing subpar DWIM logic for switch/checkout completion: add test showing subpar git switch completion
2020-06-22The fourth batchLibravatar Junio C Hamano1-0/+11
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-22Merge branch 'en/sparse-with-submodule-doc'Libravatar Junio C Hamano1-4/+26
The effect of sparse checkout settings on submodules is documented. * en/sparse-with-submodule-doc: git-sparse-checkout: clarify interactions with submodules
2020-06-22Merge branch 'es/worktree-duplicate-paths'Libravatar Junio C Hamano4-36/+141
The same worktree directory must be registered only once, but "git worktree move" allowed this invariant to be violated, which has been corrected. * es/worktree-duplicate-paths: worktree: make "move" refuse to move atop missing registered worktree worktree: generalize candidate worktree path validation worktree: prune linked worktree referencing main worktree path worktree: prune duplicate entries referencing same worktree path worktree: make high-level pruning re-usable worktree: give "should be pruned?" function more meaningful name worktree: factor out repeated string literal
2020-06-22Merge branch 'jt/redact-all-cookies'Libravatar Junio C Hamano3-43/+39
The interface to redact sensitive information in the trace output has been simplified. * jt/redact-all-cookies: http: redact all cookies, teach GIT_TRACE_REDACT=0
2020-06-22Merge branch 'cc/upload-pack-data-2'Libravatar Junio C Hamano1-89/+110
Further code clean-up. * cc/upload-pack-data-2: upload-pack: move pack_objects_hook to upload_pack_data upload-pack: move allow_sideband_all to upload_pack_data upload-pack: move allow_ref_in_want to upload_pack_data upload-pack: move allow_filter to upload_pack_data upload-pack: move keepalive to upload_pack_data upload-pack: pass upload_pack_data to upload_pack_config() upload-pack: change multi_ack to an enum upload-pack: move multi_ack to upload_pack_data upload-pack: move filter_capability_requested to upload_pack_data upload-pack: move use_sideband to upload_pack_data upload-pack: move static vars to upload_pack_data upload-pack: annotate upload_pack_data fields upload-pack: actually use some upload_pack_data bitfields
2020-06-17The third batchLibravatar Junio C Hamano2-1/+25
Also let's update the DEF_VER in GIT-VERSION-GEN that presuably is not looked at by anybody ;-) Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-17Merge branch 'es/advertise-contribution-doc'Libravatar Junio C Hamano2-2/+6
Doc updates. * es/advertise-contribution-doc: docs: mention MyFirstContribution in more places
2020-06-17Merge branch 'dl/python-2.7-is-the-floor-version'Libravatar Junio C Hamano1-6/+1
Document that we do not support Python 2.6 or older. * dl/python-2.7-is-the-floor-version: CodingGuidelines: specify Python 2.7 is the oldest version
2020-06-17Merge branch 'dl/t-readme-spell-git-correctly'Libravatar Junio C Hamano1-7/+7
Doc updates. * dl/t-readme-spell-git-correctly: t/README: avoid poor-man's small caps GIT
2020-06-17Merge branch 'js/fuzz-commit-graph-leakfix'Libravatar Junio C Hamano1-1/+1
Leakfix. * js/fuzz-commit-graph-leakfix: fuzz-commit-graph: properly free graph struct
2020-06-17Merge branch 'en/do-match-pathspec-fix'Libravatar Junio C Hamano2-17/+66
Use of negative pathspec, while collecting paths including untracked ones in the working tree, was broken. * en/do-match-pathspec-fix: dir: fix treatment of negated pathspecs
2020-06-17Merge branch 'js/msvc-build-fix'Libravatar Junio C Hamano1-1/+3
Workaround breakage in MSVC build, where "curl-config --cflags" gives settings appropriate for GCC build. * js/msvc-build-fix: msvc: fix "REG_STARTEND" issue
2020-06-17Merge branch 'en/sparse-checkout'Libravatar Junio C Hamano2-0/+26
The behaviour of "sparse-checkout" in the state "git clone --no-checkout" left was changed accidentally in 2.27, which has been corrected. * en/sparse-checkout: sparse-checkout: avoid staging deletions of all files
2020-06-17Merge branch 'js/reflog-anonymize-for-clone-and-fetch'Libravatar Junio C Hamano3-7/+30
The reflog entries for "git clone" and "git fetch" did not anonymize the URL they operated on. * js/reflog-anonymize-for-clone-and-fetch: clone/fetch: anonymize URLs in the reflog
2020-06-17Merge branch 'tb/t5318-cleanup'Libravatar Junio C Hamano1-4/+25
Code cleanup. * tb/t5318-cleanup: t5318: test that '--stdin-commits' respects '--[no-]progress' t5318: use 'test_must_be_empty'
2020-06-17Merge branch 'jk/diff-memuse-optim-with-stat-unmatch'Libravatar Junio C Hamano1-1/+4
Reduce memory usage during "diff --quiet" in a worktree with too many stat-unmatched paths. * jk/diff-memuse-optim-with-stat-unmatch: diff: discard blob data from stat-unmatched pairs
2020-06-17branch: don't mix --edit-descriptionLibravatar Denton Liu1-1/+1
`git branch` accepts `--edit-description` in conjunction with other arguments. However, `--edit-description` is its own mode, similar to `--set-upstream-to`, which is also made mutually exclusive with other modes. Prevent `--edit-description` from being mixed with other modes. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-17t3200: test for specific errorsLibravatar Denton Liu1-13/+32
In the "--set-upstream-to" and "--unset-upstream" tests, specific error conditions are being tested. However, there is no way of ensuring that a test case is failing because of some specific error. Check stderr of failing commands to ensure that they are failing in the expected way. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-17t3200: rename "expected" to "expect"Libravatar Denton Liu1-11/+11
Clean up style of test by changing some filenames from "expected" to "expect", which follows typical test convention. Also, change a space-indent into a tab-indent. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12clean: optimize and document cases where we recurse into subdirectoriesLibravatar Elijah Newren1-2/+31
Commit 6b1db43109 ("clean: teach clean -d to preserve ignored paths", 2017-05-23) added the following code block (among others) to git-clean: if (remove_directories) dir.flags |= DIR_SHOW_IGNORED_TOO | DIR_KEEP_UNTRACKED_CONTENTS; The reason for these flags is well documented in the commit message, but isn't obvious just from looking at the code. Add some explanations to the code to make it clearer. Further, it appears git-2.26 did not correctly handle this combination of flags from git-clean. With both these flags and without DIR_SHOW_IGNORED_TOO_MODE_MATCHING set, git is supposed to recurse into all untracked AND ignored directories. git-2.26.0 clearly was not doing that. I don't know the full reasons for that or whether git < 2.27.0 had additional unknown bugs because of that misbehavior, because I don't feel it's worth digging into. As per the huge changes and craziness documented in commit 8d92fb2927 ("dir: replace exponential algorithm with a linear one", 2020-04-01), the old algorithm was a mess and was thrown out. What I can say is that git-2.27.0 correctly recurses into untracked AND ignored directories with that combination. However, in clean's case we don't need to recurse into ignored directories; that is just a waste of time. Thus, when git-2.27.0 started correctly handling those flags, we got a performance regression report. Rather than relying on other bugs in fill_directory()'s former logic to provide the behavior of skipping ignored directories, make use of the DIR_SHOW_IGNORED_TOO_MODE_MATCHING value specifically added in commit eec0f7f2b7 ("status: add option to show ignored files differently", 2017-10-30) for this purpose. Reported-by: Brian Malehorn <bmalehorn@gmail.com> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12clean: consolidate handling of ignored parametersLibravatar Elijah Newren1-9/+7
I spent a long time trying to figure out how and whether the code worked with different values of ignore, ignore_only, and remove_directories. After lots of time setting up lots of testcases, sifting through lots of print statements, and walking through the debugger, I finally realized that one piece of code related to how it was all setup was found in clean.c rather than dir.c. Make a change that would have made it easier for me to do the extra testing by putting this handling in one spot. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12dir, clean: avoid disallowed behaviorLibravatar Elijah Newren2-1/+5
dir.h documented quite clearly that DIR_SHOW_IGNORED and DIR_SHOW_IGNORED_TOO are mutually exclusive, with a big comment to this effect by the definition of both enum values. However, a command like git clean -fx $DIR would set both values for dir.flags. I _think_ it happened to work because: * As dir.h points out, DIR_KEEP_UNTRACKED_CONTENTS only takes effect if DIR_SHOW_IGNORED_TOO is set. * As coded, I believe DIR_SHOW_IGNORED would just happen to take precedence over DIR_SHOW_IGNORED_TOO in the code as currently constructed. Which is a long way of saying "we just got lucky". Fix clean.c to avoid setting these mutually exclusive values at the same time, and add a check to dir.c that will throw a BUG() to prevent anyone else from making this mistake. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12dir: fix a few confusing commentsLibravatar Elijah Newren1-5/+6
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12git-sparse-checkout: clarify interactions with submodulesLibravatar Elijah Newren1-4/+26
Ignoring the sparse-checkout feature momentarily, if one has a submodule and creates local branches within it with unpushed changes and maybe adds some untracked files to it, then we would want to avoid accidentally removing such a submodule. So, for example with git.git, if you run git checkout v2.13.0 then the sha1collisiondetection/ submodule is NOT removed even though it did not exist as a submodule until v2.14.0. Similarly, if you only had v2.13.0 checked out previously and ran git checkout v2.14.0 the sha1collisiondetection/ submodule would NOT be automatically initialized despite being part of v2.14.0. In both cases, git requires submodules to be initialized or deinitialized separately. Further, we also have special handling for submodules in other commands such as clean, which requires two --force flags to delete untracked submodules, and some commands have a --recurse-submodules flag. sparse-checkout is very similar to checkout, as evidenced by the similar name -- it adds and removes files from the working copy. However, for the same avoid-data-loss reasons we do not want to remove a submodule from the working copy with checkout, we do not want to do it with sparse-checkout either. So submodules need to be separately initialized or deinitialized; changing sparse-checkout rules should not automatically trigger the removal or vivification of submodules. I believe the previous wording in git-sparse-checkout.txt about submodules was only about this particular issue. Unfortunately, the previous wording could be interpreted to imply that submodules should be considered active regardless of sparsity patterns. Update the wording to avoid making such an implication. It may be helpful to consider two example situations where the differences in wording become important: In the future, we want users to be able to run commands like git clone --sparse=moduleA --recurse-submodules $REPO_URL and have sparsity paths automatically set up and have submodules *within the sparsity paths* be automatically initialized. We do not want all submodules in any path to be automatically initialized with that command. Similarly, we want to be able to do things like git -c sparse.restrictCmds grep --recurse-submodules $REV $PATTERN and search through $REV for $PATTERN within the recorded sparsity patterns. We want it to recurse into submodules within those sparsity patterns, but do not want to recurse into directories that do not match the sparsity patterns in search of a possible submodule. Signed-off-by: Elijah Newren <newren@gmail.com> Reviewed-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12Merge branch 'hn/refs-cleanup'Libravatar Junio C Hamano9-25/+1137
Preliminary clean-ups around refs API, plus file format specification documentation for the reftable backend. * hn/refs-cleanup: reftable: define version 2 of the spec to accomodate SHA256 reftable: clarify how empty tables should be written reftable: file format documentation refs: improve documentation for ref iterator t: use update-ref and show-ref to reading/writing refs refs.h: clarify reflog iteration order
2020-06-12Documentation: usage for diff combined commitsLibravatar Chris Torek2-5/+23
Document the usage for producing combined commits with "git diff". This includes updating the synopsis section. While here, add the three-dot notation to the synopsis. Make "git diff -h" print the same usage summary as the manual page synopsis, minus the "A..B" form, which is now discouraged. Signed-off-by: Chris Torek <chris.torek@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-12git diff: improve range handlingLibravatar Chris Torek2-13/+202
When git diff is given a symmetric difference A...B, it chooses some merge base from the two specified commits (as documented). This fails, however, if there is *no* merge base: instead, you see the differences between A and B, which is certainly not what is expected. Moreover, if additional revisions are specified on the command line ("git diff A...B C"), the results get a bit weird: * If there is a symmetric difference merge base, this is used as the left side of the diff. The last final ref is used as the right side. * If there is no merge base, the symmetric status is completely lost. We will produce a combined diff instead. Similar weirdness occurs if you use, e.g., "git diff C A...B D". Likewise, using multiple two-dot ranges, or tossing extra revision specifiers into the command line with two-dot ranges, or mixing two and three dot ranges, all produce nonsense. To avoid all this, add a routine to catch the range cases and verify that that the arguments make sense. As a side effect, produce a warning showing *which* merge base is being used when there are multiple choices; die if there is no merge base. Signed-off-by: Chris Torek <chris.torek@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: refactor common code into do_got_oid()Libravatar Christian Couder1-30/+13
As 'upload-pack.c' is now using 'struct upload_pack_data' thoroughly, let's refactor some common code into a new do_got_oid() function. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: move oldest_have to upload_pack_dataLibravatar Christian Couder1-7/+6
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's move the 'oldest_have' static variable into this struct. It is used by both protocol v0 and protocol v2 code. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to got_oid()Libravatar Christian Couder1-4/+4
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to got_oid(), so that this function can use all the fields of the struct. This will be used in followup commits to move a static variable into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to ok_to_give_up()Libravatar Christian Couder1-7/+6
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to ok_to_give_up(), so that this function can use all the fields of the struct. This will be used in followup commits to move a static variable into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to send_acks()Libravatar Christian Couder1-10/+7
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to send_acks(), so that this function can use all the fields of the struct. This will be used in followup commits to move a static variable into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to process_haves()Libravatar Christian Couder1-6/+5
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to process_haves(), so that this function can use all the fields of the struct. This will be used in followup commits to move a static variable into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: change allow_unadvertised_object_request to an enumLibravatar Christian Couder1-36/+32
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's change allow_unadvertised_object_request, which is now part of 'upload_pack_data', from an 'unsigned int' to an enum. This will make it clear which values this variable can take. While at it let's change this variable name to 'allow_uor' to make it shorter. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: move allow_unadvertised_object_request to upload_pack_dataLibravatar Christian Couder1-23/+32
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's move the 'allow_unadvertised_object_request' static variable into this struct. It is used by code common to protocol v0 and protocol v2. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: move extra_edge_obj to upload_pack_dataLibravatar Christian Couder1-4/+7
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's move the 'extra_edge_obj' static variable into this struct. It is used by code common to protocol v0 and protocol v2. While at it let's properly initialize and clear 'extra_edge_obj' in the appropriate 'upload_pack_data' initialization and clearing functions. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: move shallow_nr to upload_pack_dataLibravatar Christian Couder1-12/+12
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's move the 'shallow_nr' static variable into this struct. It is used by code common to protocol v0 and protocol v2. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to send_unshallow()Libravatar Christian Couder1-9/+7
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to send_unshallow(), so that this function can use all the fields of the struct. This will be used in followup commits to move static variables into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to deepen_by_rev_list()Libravatar Christian Couder1-8/+6
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to deepen_by_rev_list(), so that this function can use all the fields of the struct. This will be used in followup commits to move static variables into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to deepen()Libravatar Christian Couder1-14/+11
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to deepen(), so that this function can use all the fields of the struct. This will be used in followup commits to move static variables into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-11upload-pack: pass upload_pack_data to send_shallow_list()Libravatar Christian Couder1-36/+21
As we cleanup 'upload-pack.c' by using 'struct upload_pack_data' more thoroughly, let's pass that struct to send_shallow_list(), so that this function can use all the fields of the struct. This will be used in followup commits to move static variables into 'upload_pack_data'. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: make "move" refuse to move atop missing registered worktreeLibravatar Eric Sunshine3-3/+25
"git worktree add" takes special care to avoid creating a new worktree at a location already registered to an existing worktree even if that worktree is missing (which can happen, for instance, if the worktree resides on removable media). "git worktree move", however, is not so careful when validating the destination location and will happily move the source worktree atop the location of a missing worktree. This leads to the anomalous situation of multiple worktrees being associated with the same path, which is expressly forbidden by design. For example: $ git clone foo.git $ cd foo $ git worktree add ../bar $ git worktree add ../baz $ rm -rf ../bar $ git worktree move ../baz ../bar $ git worktree list .../foo beefd00f [master] .../bar beefd00f [bar] .../bar beefd00f [baz] $ git worktree remove ../bar fatal: validation failed, cannot remove working tree: '.../bar' does not point back to '.git/worktrees/bar' Fix this shortcoming by enhancing "git worktree move" to perform the same additional validation of the destination directory as done by "git worktree add". While at it, add a test to verify that "git worktree move" won't move a worktree atop an existing (non-worktree) path -- a restriction which has always been in place but was never tested. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: generalize candidate worktree path validationLibravatar Eric Sunshine1-13/+16
"git worktree add" checks that the specified path is a valid location for a new worktree by ensuring that the path does not already exist and is not already registered to another worktree (a path can be registered but missing, for instance, if it resides on removable media). Since "git worktree add" is not the only command which should perform such validation ("git worktree move" ought to also), generalize the the validation function for use by other callers, as well. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: prune linked worktree referencing main worktree pathLibravatar Eric Sunshine2-0/+27
"git worktree prune" detects when multiple entries are associated with the same path and prunes the duplicates, however, it does not detect when a linked worktree points at the path of the main worktree. Although "git worktree add" disallows creating a new worktree with the same path as the main worktree, such a case can arise outside the control of Git even without the user mucking with .git/worktree/<id>/ administrative files. For instance: $ git clone foo.git $ git -C foo worktree add ../bar $ rm -rf bar $ mv foo bar $ git -C bar worktree list .../bar deadfeeb [master] .../bar deadfeeb [bar] Help the user recover from such corruption by extending "git worktree prune" to also detect when a linked worktree is associated with the path of the main worktree. Reported-by: Jonathan Müller <jonathanmueller.dev@gmail.com> Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-10worktree: prune duplicate entries referencing same worktree pathLibravatar Eric Sunshine2-6/+55
A fundamental restriction of linked working trees is that there must only ever be a single worktree associated with a particular path, thus "git worktree add" explicitly disallows creation of a new worktree at the same location as an existing registered worktree. Nevertheless, users can still "shoot themselves in the foot" by mucking with administrative files in .git/worktree/<id>/. Worse, "git worktree move" is careless[1] and allows a worktree to be moved atop a registered but missing worktree (which can happen, for instance, if the worktree is on removable media). For instance: $ git clone foo.git $ cd foo $ git worktree add ../bar $ git worktree add ../baz $ rm -rf ../bar $ git worktree move ../baz ../bar $ git worktree list .../foo beefd00f [master] .../bar beefd00f [bar] .../bar beefd00f [baz] Help users recover from this form of corruption by teaching "git worktree prune" to detect when multiple worktrees are associated with the same path. [1]: A subsequent commit will fix "git worktree move" validation to be more strict. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>