Change filters.txt to ref-reachability-filters.txt in order to avoid
squatting on a file name that might be useful for another purpose.
Signed-off-by: NAaron Lipman <alipman88@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The internal reachable-filter API is a bit loose and imprecise; it
also bleeds unnecessarily into the public header. Tighten the API
by:

* renaming do_merge_filter() to reach_filter()

* separating parameters to explicitly identify what data is used
  by the function instead of passing an entire ref_filter_cbdata
  struct

* renaming and moving internal constants from header to source
  file
Signed-off-by: NAaron Lipman <alipman88@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Enable ref-filter to process multiple merged and no-merged filters, and
extend functionality to git branch, git tag and git for-each-ref. This
provides an easy way to check for branches that are "graduation
candidates:"

$ git branch --no-merged master --merged next

If passed more than one merged (or more than one no-merged) filter, refs
must be reachable from any one of the merged commits, and reachable from
none of the no-merged commits.
Signed-off-by: NAaron Lipman <alipman88@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Update documentation for "git branch", "git for-each-ref" and "git tag"
with notes explaining what happens when passed multiple --contains or
--no-contains filters.

This behavior is useful to document prior to enabling multiple
merged/no-merged filters, in order to demonstrate consistent behavior
between merged/no-merged and contains/no-contains filters.
Signed-off-by: NAaron Lipman <alipman88@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Add tests covering the behavior of passing multiple contains/no-contains
filters to git branch, e.g.:

$ git branch --contains feature_a --contains feature_b
$ git branch --no-contains feature_a --no-contains feature_b

When passed more than one contains (or no-contains) filter, the tips of
the branches returned must be reachable from any of the contains commits
and from none of the the no-contains commits.

This logic is useful to describe prior to enabling multiple
merged/no-merged filters, so that future tests will demonstrate
consistent behavior between merged/no-merged and contains/no-contains
filters.
Signed-off-by: NAaron Lipman <alipman88@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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

"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

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

"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

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

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()

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"

"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

Leakfix.

* jk/worktree-check-clean-leakfix:
  worktree: fix leak in check_clean_worktree()

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

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

expat.lib -> libexpat.lib (libexpatd.lib for debug build).
Signed-off-by: NOrgad Shaneh <orgads@gmail.com>
Acked-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Doc update.

* pb/doc-external-diff-env:
  git.txt: correct stale 'GIT_EXTERNAL_DIFF' description

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()

Doc update.

* jc/post-checkout-doc:
  doc: clarify how exit status of post-checkout hook is used

Doc update.

* pb/doc-sequence-editor-configuration:
  doc: mention GIT_SEQUENCE_EDITOR and 'sequence.editor' more

Doc update.

* hl/bisect-doc-clarify-bad-good-ordering:
  bisect: swap command-line options in documentation

Documentation update for "--no-abbrev-commit".

* so/pretty-abbrev-doc:
  pretty-options.txt: fix --no-abbrev-commit description

"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

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

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

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

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

"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

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

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

"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

Signed-off-by: NOrgad Shaneh <orgads@gmail.com>
Acked-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NOrgad Shaneh <orgads@gmail.com>
Acked-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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: NJonathan Tan <jonathantanmy@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This makes it clear that dwim_ref() is just repo_dwim_ref() without the
first parameter.
Signed-off-by: NJonathan Tan <jonathantanmy@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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: NJonathan Tan <jonathantanmy@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

887952b8 ("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: NJonathan Tan <jonathantanmy@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>