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2020-09-20t4068: add --merge-base testsLibravatar Denton Liu1-1/+10
In the future, we will be adding more --merge-base tests to this test script. To prepare for that, rename the script accordingly and update its description. Also, add two basic --merge-base tests that don't require any functionality to be implemented yet. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-20diff-lib: define diff_get_merge_base()Libravatar Denton Liu2-0/+47
In a future commit, we will be using this function to implement --merge-base functionality in various diff commands. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-20diff-lib: accept option flags in run_diff_index()Libravatar Denton Liu4-10/+13
In a future commit, we will teach run_diff_index() to accept more options via flag bits. For now, change `cached` into a flag in the `option` bitfield. The behaviour should remain exactly the same. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-17contrib/completion: extract common diff/difftool optionsLibravatar Denton Liu1-9/+6
difftool parses its own options and then passes the remaining options onto diff. As a result, they share common command-line options. Instead of duplicating the list, use a shared $__git_diff_difftool_options list. The completion for diff is missing --relative and the completion for difftool is missing --no-index. Add both of these to the common list. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-17git-diff.txt: backtick quote command textLibravatar Denton Liu1-9/+9
The modern way to quote commands in the documentation is to use backticks instead of double-quotes as this renders the text with the code style. Convert double-quoted command text to backtick-quoted commands. While we're at it, quote one instance of `^@`. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-17git-diff-index.txt: make --cached description a proper sentenceLibravatar Denton Liu1-1/+1
Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-17t4068: remove unnecessary >tmpLibravatar Denton Liu1-5/+5
The many `git diff` invocations have a `>tmp` redirection even though the file is not being used afterwards. Remove these unnecessary redirections. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-09Fourteenth batchLibravatar Junio C Hamano1-0/+28
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-09Merge branch 'os/vcbuild'Libravatar Junio C Hamano4-4/+5
Fix build procedure for MSVC. * os/vcbuild: contrib/buildsystems: fix expat library name for generated vcxproj vcbuild: fix batch file name in README vcbuild: fix library name for expat with make MSVC=1
2020-09-09Merge branch 'jt/interpret-branch-name-fallback'Libravatar Junio C Hamano20-53/+98
"git status" has trouble showing where it came from by interpreting reflog entries that recordcertain events, e.g. "checkout @{u}", and gives a hard/fatal error. Even though it inherently is impossible to give a correct answer because the reflog entries lose some information (e.g. "@{u}" does not record what branch the user was on hence which branch 'the upstream' needs to be computed, and even if the record were available, the relationship between branches may have changed), at least hide the error to allow "status" show its output. * jt/interpret-branch-name-fallback: wt-status: tolerate dangling marks refs: move dwim_ref() to header file sha1-name: replace unsigned int with option struct
2020-09-09Merge branch 'js/ci-squelch-false-failure'Libravatar Junio C Hamano1-3/+2
CI noise reduction. * js/ci-squelch-false-failure: ci: avoid ugly "failure" in the `ci-config` job ci: fix indentation of the `ci-config` job
2020-09-09Merge branch 'pb/imap-send-updates'Libravatar Junio C Hamano1-15/+19
"git imap-send" updates. * pb/imap-send-updates: git-imap-send.txt: add note about localized Gmail folders git-imap-send.txt: do verify SSL certificate for gmail.com git-imap-send.txt: don't duplicate 'Examples' sections
2020-09-09Merge branch 'hv/ref-filter-misc'Libravatar Junio C Hamano5-65/+161
The "--format=" option to the "for-each-ref" command and friends learned a few more tricks, e.g. the ":short" suffix that applies to "objectname" now also can be used for "parent", "tree", etc. * hv/ref-filter-misc: ref-filter: add `sanitize` option for 'subject' atom pretty: refactor `format_sanitized_subject()` ref-filter: add `short` modifier to 'parent' atom ref-filter: add `short` modifier to 'tree' atom ref-filter: rename `objectname` related functions and fields ref-filter: modify error messages in `grab_objectname()` ref-filter: refactor `grab_objectname()` ref-filter: support different email formats
2020-09-09Merge branch 'ss/submodule-summary-in-c-fixes'Libravatar Junio C Hamano2-10/+9
Fixups to a topic in 'next'. * ss/submodule-summary-in-c-fixes: t7421: eliminate 'grep' check in t7421.4 for mingw compatibility submodule: fix style in function definition submodule: eliminate unused parameters from print_submodule_summary()
2020-09-09Merge branch 'so/separate-field-for-m-and-diff-merges'Libravatar Junio C Hamano3-8/+9
Internal API clean-up to handle two options "diff-index" and "log" have, which happen to share the same short form, more sensibly. * so/separate-field-for-m-and-diff-merges: revision: add separate field for "-m" of "diff-index -m"
2020-09-09Merge branch 'es/worktree-repair'Libravatar Junio C Hamano7-2/+445
"git worktree" gained a "repair" subcommand to help users recover after moving the worktrees or repository manually without telling Git. Also, "git init --separate-git-dir" no longer corrupts administrative data related to linked worktrees. * es/worktree-repair: init: make --separate-git-dir work from within linked worktree init: teach --separate-git-dir to repair linked worktrees worktree: teach "repair" to fix outgoing links to worktrees worktree: teach "repair" to fix worktree back-links to main worktree worktree: add skeleton "repair" command
2020-09-09Merge branch 'jk/worktree-check-clean-leakfix'Libravatar Junio C Hamano1-5/+3
Leakfix. * jk/worktree-check-clean-leakfix: worktree: fix leak in check_clean_worktree()
2020-09-09Merge branch 'tb/repack-clearing-midx'Libravatar Junio C Hamano5-11/+65
When a packfile is removed by "git repack", multi-pack-index gets cleared; the code was taught to do so less aggressively by first checking if the midx actually refers to a pack that no longer exists. * tb/repack-clearing-midx: midx: traverse the local MIDX first builtin/repack.c: invalidate MIDX only when necessary
2020-09-09Merge branch 'ss/submodule-summary-in-c'Libravatar Junio C Hamano7-195/+512
Yet another subcommand of "git submodule" is getting rewritten in C. * ss/submodule-summary-in-c: submodule: port submodule subcommand 'summary' from shell to C t7421: introduce a test script for verifying 'summary' output submodule: rename helper functions to avoid ambiguity submodule: remove extra line feeds between callback struct and macro
2020-09-08contrib/buildsystems: fix expat library name for generated vcxprojLibravatar Orgad Shaneh2-1/+2
expat.lib -> libexpat.lib (libexpatd.lib for debug build). Signed-off-by: Orgad Shaneh <orgads@gmail.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-03Thirteenth batchLibravatar Junio C Hamano1-0/+26
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-03Merge branch 'pb/doc-external-diff-env'Libravatar Junio C Hamano2-3/+5
Doc update. * pb/doc-external-diff-env: git.txt: correct stale 'GIT_EXTERNAL_DIFF' description
2020-09-03Merge branch 'jk/xrealloc-avoid-use-after-free'Libravatar Junio C Hamano1-2/+5
It was possible for xrealloc() to send a non-NULL pointer that has been freed, which has been fixed. * jk/xrealloc-avoid-use-after-free: xrealloc: do not reuse pointer freed by zero-length realloc()
2020-09-03Merge branch 'jc/post-checkout-doc'Libravatar Junio C Hamano1-1/+3
Doc update. * jc/post-checkout-doc: doc: clarify how exit status of post-checkout hook is used
2020-09-03Merge branch 'pb/doc-sequence-editor-configuration'Libravatar Junio C Hamano2-0/+7
Doc update. * pb/doc-sequence-editor-configuration: doc: mention GIT_SEQUENCE_EDITOR and 'sequence.editor' more
2020-09-03Merge branch 'hl/bisect-doc-clarify-bad-good-ordering'Libravatar Junio C Hamano3-3/+3
Doc update. * hl/bisect-doc-clarify-bad-good-ordering: bisect: swap command-line options in documentation
2020-09-03Merge branch 'so/pretty-abbrev-doc'Libravatar Junio C Hamano1-2/+2
Documentation update for "--no-abbrev-commit". * so/pretty-abbrev-doc: pretty-options.txt: fix --no-abbrev-commit description
2020-09-03Merge branch 'mr/diff-hide-stat-wo-textual-change'Libravatar Junio C Hamano2-9/+67
"git diff --stat -w" showed 0-line changes for paths whose changes were only whitespaces, which was not intuitive. We now omit such paths from the stat output. * mr/diff-hide-stat-wo-textual-change: diff: teach --stat to ignore uninteresting modifications
2020-09-03Merge branch 'jt/lazy-fetch'Libravatar Junio C Hamano25-215/+278
Updates to on-demand fetching code in lazily cloned repositories. * jt/lazy-fetch: fetch: no FETCH_HEAD display if --no-write-fetch-head fetch-pack: remove no_dependents code promisor-remote: lazy-fetch objects in subprocess fetch-pack: do not lazy-fetch during ref iteration fetch: only populate existing_refs if needed fetch: avoid reading submodule config until needed fetch: allow refspecs specified through stdin negotiator/noop: add noop fetch negotiator
2020-09-03Merge branch 'jc/run-command-use-embedded-args'Libravatar Junio C Hamano4-19/+7
Various callers of run_command API has been modernized. * jc/run-command-use-embedded-args: run_command: teach API users to use embedded 'args' more
2020-09-03Merge branch 'jc/undash-in-tree-git-callers'Libravatar Junio C Hamano3-14/+14
A handful of places in in-tree code still relied on being able to execute the git subcommands, especially built-ins, in "git-foo" form, which have been corrected. * jc/undash-in-tree-git-callers: credential-cache: use child_process.args cvsexportcommit: do not run git programs in dashed form transport-helper: do not run git-remote-ext etc. in dashed form
2020-09-03Merge branch 'jk/slimmed-down'Libravatar Junio C Hamano31-3915/+80
Trim an unused binary and turn a bunch of commands into built-in. * jk/slimmed-down: drop vcs-svn experiment make git-fast-import a builtin make git-bugreport a builtin make credential helpers builtins Makefile: drop builtins from MSVC pdb list
2020-09-03Merge branch 'pw/add-p-allowed-options-fix'Libravatar Junio C Hamano1-25/+42
"git add -p" update. * pw/add-p-allowed-options-fix: add -p: fix checking of user input add -p: use ALLOC_GROW_BY instead of ALLOW_GROW
2020-09-03Merge branch 'jt/fetch-pack-loosen-validation-with-packfile-uri'Libravatar Junio C Hamano5-1/+72
Bugfix for "git fetch" when the packfile URI capability is in use. * jt/fetch-pack-loosen-validation-with-packfile-uri: fetch-pack: make packfile URIs work with transfer.fsckobjects fetch-pack: document only_packfile in get_pack() (various): document from_promisor parameter
2020-09-03Merge branch 'ss/t7401-modernize'Libravatar Junio C Hamano1-73/+76
Test clean-up. * ss/t7401-modernize: t7401: add a NEEDSWORK t7401: change indentation for enhanced readability t7401: change syntax of test_i18ncmp calls for clarity t7401: use 'short' instead of 'verify' and cut in rev-parse calls t7401: modernize style
2020-09-03Merge branch 'pw/rebase-i-more-options'Libravatar Junio C Hamano11-49/+423
"git rebase -i" learns a bit more options. * pw/rebase-i-more-options: t3436: do not run git-merge-recursive in dashed form rebase: add --reset-author-date rebase -i: support --ignore-date rebase -i: support --committer-date-is-author-date am: stop exporting GIT_COMMITTER_DATE rebase -i: add --ignore-whitespace flag
2020-09-03vcbuild: fix batch file name in READMELibravatar Orgad Shaneh1-2/+2
Signed-off-by: Orgad Shaneh <orgads@gmail.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-03vcbuild: fix library name for expat with make MSVC=1Libravatar Orgad Shaneh1-1/+1
Signed-off-by: Orgad Shaneh <orgads@gmail.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02wt-status: tolerate dangling marksLibravatar Jonathan Tan19-29/+60
When a user checks out the upstream branch of HEAD, the upstream branch not being a local branch, and then runs "git status", like this: git clone $URL client cd client git checkout @{u} git status no status is printed, but instead an error message: fatal: HEAD does not point to a branch (This error message when running "git branch" persists even after checking out other things - it only stops after checking out a branch.) This is because "git status" reads the reflog when determining the "HEAD detached" message, and thus attempts to DWIM "@{u}", but that doesn't work because HEAD no longer points to a branch. Therefore, when calculating the status of a worktree, tolerate dangling marks. This is done by adding an additional parameter to dwim_ref() and repo_dwim_ref(). Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02refs: move dwim_ref() to header fileLibravatar Jonathan Tan2-6/+7
This makes it clear that dwim_ref() is just repo_dwim_ref() without the first parameter. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02sha1-name: replace unsigned int with option structLibravatar Jonathan Tan4-21/+34
In preparation for a future patch adding a boolean parameter to repo_interpret_branch_name(), which might be easily confused with an existing unsigned int parameter, refactor repo_interpret_branch_name() to take an option struct instead of the unsigned int parameter. The static function interpret_branch_mark() is also updated to take the option struct in preparation for that future patch, since it will also make use of the to-be-introduced boolean parameter. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02fetch: no FETCH_HEAD display if --no-write-fetch-headLibravatar Jonathan Tan3-11/+22
887952b8c6 ("fetch: optionally allow disabling FETCH_HEAD update", 2020-08-18) introduced the ability to disable writing to FETCH_HEAD during fetch, but did not suppress the "<source> -> FETCH_HEAD" message when this ability is used. This message is misleading in this case, because FETCH_HEAD is not written. Also, because "fetch" is used to lazy-fetch missing objects in a partial clone, this significantly clutters up the output in that case since the objects to be fetched are potentially numerous. Therefore, suppress this message when --no-write-fetch-head is passed (but not when --dry-run is set). Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02ci: avoid ugly "failure" in the `ci-config` jobLibravatar Johannes Schindelin1-2/+1
In the common case where users have _not_ pushed a `ci-config` branch to configure which branches should be included in the GitHub workflow runs, there is a big fat ugly annotation about a failure in the run's log: X Check failure on line 1 in .github @github-actions github-actions / ci-config .github#L1 Process completed with exit code 128. The reason is that the `ci-config` job tries to clone that `ci-config` branch, and even if it is configured to continue on error, the annotation is displayed, and it is distracting. Let's just handle this on the shell script level, so that the job's step is not marked as a failure. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02ci: fix indentation of the `ci-config` jobLibravatar Johannes Schindelin1-2/+2
The section added in e76eec35540f (ci: allow per-branch config for GitHub Actions, 2020-05-07) contains a `&&`-chain that connects several commands. The first command is actually so long that it stretches over multiple lines, and as per usual, the continuation lines are indented one more level than the first. However, the subsequent commands in the `&&`-chain were also indented one more level than the first command, which was almost certainly unintended. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-02xrealloc: do not reuse pointer freed by zero-length realloc()Libravatar Jeff King1-2/+5
This patch fixes a bug where xrealloc(ptr, 0) can double-free and corrupt the heap on some platforms (including at least glibc). The C99 standard says of malloc (section 7.20.3): If the size of the space requested is zero, the behavior is implementation-defined: either a null pointer is returned, or the behavior is as if the size were some nonzero value, except that the returned pointer shall not be used to access an object. So we might get NULL back, or we might get an actual pointer (but we're not allowed to look at its contents). To simplify our code, our xmalloc() handles a NULL return by converting it into a single-byte allocation. That way callers get consistent behavior. This was done way back in 4e7a2eccc2 (?alloc: do not return NULL when asked for zero bytes, 2005-12-29). We also gave xcalloc() and xrealloc() the same treatment. And according to C99, that is fine; the text above is in a paragraph that applies to all three. But what happens to the memory we passed to realloc() in such a case? I.e., if we do: ret = realloc(ptr, 0); and "ptr" is non-NULL, but we get NULL back, is "ptr" still valid? C99 doesn't cover this case specifically, but says (section 7.20.3.4): The realloc function deallocates the old object pointed to by ptr and returns a pointer to a new object that has the size specified by size. So "ptr" is now deallocated, and we must only look at "ret". And since "ret" is NULL, that means we have no allocated object at all. But that's not quite the whole story. It also says: If memory for the new object cannot be allocated, the old object is not deallocated and its value is unchanged. [...] The realloc function returns a pointer to the new object (which may have the same value as a pointer to the old object), or a null pointer if the new object could not be allocated. So if we see a NULL return with a non-zero size, we can expect that the original object _is_ still valid. But with a non-zero size, it's ambiguous. The NULL return might mean a failure (in which case the object is valid), or it might mean that we successfully allocated nothing, and used NULL to represent that. The glibc manpage for realloc() explicitly says: [...]if size is equal to zero, and ptr is not NULL, then the call is equivalent to free(ptr). Likewise, this StackOverflow answer: https://stackoverflow.com/a/2135302 claims that C89 gave similar guidance (but I don't have a copy to verify it). A comment on this answer: https://stackoverflow.com/a/2022410 claims that Microsoft's CRT behaves the same. But our current "retry with 1 byte" code passes the original pointer again. So on glibc, we effectively free() the pointer and then try to realloc() it again, which is undefined behavior. The simplest fix here is to just pass "ret" (which we know to be NULL) to the follow-up realloc(). But that means that a system which _doesn't_ free the original pointer would leak it. It's not clear if any such systems exist, and that interpretation of the standard seems unlikely (I'd expect a system that doesn't deallocate to simply return the original pointer in this case). But it's easy enough to err on the safe side, and just never pass a zero size to realloc() at all. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-01git.txt: correct stale 'GIT_EXTERNAL_DIFF' descriptionLibravatar Philippe Blain2-3/+5
In fde97d8ac6 (Update documentation to remove incorrect GIT_DIFF_OPTS example., 2006-11-27), the description of the 'GIT_EXTERNAL_DIFF' variable was moved from 'diff-format.txt' to 'git.txt', and the documentation was updated to remove a 'diff(1)' invocation since Git did not use an external diff program anymore by default. However, the description of 'GIT_EXTERNAL_DIFF' still mentions "instead of the diff invocation described above", which is confusing. Correct that outdated sentence. Also, link to git(1) in 'diff-generate-patch.txt' when GIT_DIFF_OPTS and GIT_EXTERNAL_DIFF are mentioned, so that users can easily know what these variables are about. Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-31Twelfth batchLibravatar Junio C Hamano1-0/+39
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-31Merge branch 'ps/ref-transaction-hook'Libravatar Junio C Hamano2-12/+12
Code simplification by removing ineffective optimization. * ps/ref-transaction-hook: refs: remove lookup cache for reference-transaction hook
2020-08-31Merge branch 'jk/rev-input-given-fix'Libravatar Junio C Hamano3-5/+26
Feeding "$ZERO_OID" to "git log --ignore-missing --stdin", and running "git log --ignore-missing $ZERO_OID" fell back to start digging from HEAD; it has been corrected to become a no-op, like "git log --tags=no-tag-matches-this-pattern" does. * jk/rev-input-given-fix: revision: set rev_input_given in handle_revision_arg()
2020-08-31Merge branch 'jc/ident-whose-ident'Libravatar Junio C Hamano2-18/+43
Error message update. * jc/ident-whose-ident: ident: say whose identity is missing when giving user.name hint