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Author SHA1 Message Date
Junio C Hamano 223a1bfb58 Merge branch 'js/retire-preserve-merges'
The "--preserve-merges" option of "git rebase" has been removed.

* js/retire-preserve-merges:
  sequencer: restrict scope of a formerly public function
  rebase: remove a no-longer-used function
  rebase: stop mentioning the -p option in comments
  rebase: remove obsolete code comment
  rebase: drop the internal `rebase--interactive` command
  git-svn: drop support for `--preserve-merges`
  rebase: drop support for `--preserve-merges`
  pull: remove support for `--rebase=preserve`
  tests: stop testing `git rebase --preserve-merges`
  remote: warn about unhandled branch.<name>.rebase values
  t5520: do not use `pull.rebase=preserve`
2021-10-18 15:47:56 -07:00
Junio C Hamano d7bc852151 Merge branch 'ab/align-parse-options-help'
When "git cmd -h" shows more than one line of usage text (e.g.
the cmd subcommand may take sub-sub-command), parse-options API
learned to align these lines, even across i18n/l10n.

* ab/align-parse-options-help:
  parse-options: properly align continued usage output
  git rev-parse --parseopt tests: add more usagestr tests
  send-pack: properly use parse_options() API for usage string
  parse-options API users: align usage output in C-strings
2021-10-13 15:15:58 -07:00
Junio C Hamano 62f035aee3 Merge branch 'ab/help-config-vars'
Teach "git help -c" into helping the command line completion of
configuration variables.

* ab/help-config-vars:
  help: move column config discovery to help.c library
  help / completion: make "git help" do the hard work
  help tests: test --config-for-completion option & output
  help: simplify by moving to OPT_CMDMODE()
  help: correct logic error in combining --all and --guides
  help: correct logic error in combining --all and --config
  help tests: add test for --config output
  help: correct usage & behavior of "git help --guides"
  help: correct the usage string in -h and documentation
2021-10-13 15:15:58 -07:00
Junio C Hamano a5e61a4225 Merge branch 'ab/config-based-hooks-1'
Mostly preliminary clean-up in the hook API.

* ab/config-based-hooks-1:
  hook-list.h: add a generated list of hooks, like config-list.h
  hook.c users: use "hook_exists()" instead of "find_hook()"
  hook.c: add a hook_exists() wrapper and use it in bugreport.c
  hook.[ch]: move find_hook() from run-command.c to hook.c
  Makefile: remove an out-of-date comment
  Makefile: don't perform "mv $@+ $@" dance for $(GENERATED_H)
  Makefile: stop hardcoding {command,config}-list.h
  Makefile: mark "check" target as .PHONY
2021-10-13 15:15:57 -07:00
Junio C Hamano a7c2daa06d Merge branch 'en/removing-untracked-fixes'
Various fixes in code paths that move untracked files away to make room.

* en/removing-untracked-fixes:
  Documentation: call out commands that nuke untracked files/directories
  Comment important codepaths regarding nuking untracked files/dirs
  unpack-trees: avoid nuking untracked dir in way of locally deleted file
  unpack-trees: avoid nuking untracked dir in way of unmerged file
  Change unpack_trees' 'reset' flag into an enum
  Remove ignored files by default when they are in the way
  unpack-trees: make dir an internal-only struct
  unpack-trees: introduce preserve_ignored to unpack_trees_options
  read-tree, merge-recursive: overwrite ignored files by default
  checkout, read-tree: fix leak of unpack_trees_options.dir
  t2500: add various tests for nuking untracked files
2021-10-13 15:15:57 -07:00
Junio C Hamano 2d498a7c89 Merge branch 'ds/add-rm-with-sparse-index'
"git add", "git mv", and "git rm" have been adjusted to avoid
updating paths outside of the sparse-checkout definition unless
the user specifies a "--sparse" option.

* ds/add-rm-with-sparse-index:
  advice: update message to suggest '--sparse'
  mv: refuse to move sparse paths
  rm: skip sparse paths with missing SKIP_WORKTREE
  rm: add --sparse option
  add: update --renormalize to skip sparse paths
  add: update --chmod to skip sparse paths
  add: implement the --sparse option
  add: skip tracked paths outside sparse-checkout cone
  add: fail when adding an untracked sparse file
  dir: fix pattern matching on dirs
  dir: select directories correctly
  t1092: behavior for adding sparse files
  t3705: test that 'sparse_entry' is unstaged
2021-10-13 15:15:56 -07:00
Junio C Hamano 1e50f2a689 Merge branch 'mr/bisect-in-c-4'
Message fix.

* mr/bisect-in-c-4:
  bisect--helper: add space between colon and following sentence
2021-10-11 10:21:49 -07:00
Junio C Hamano 0cc4ec1550 Merge branch 'da/difftool'
Code clean-up in "git difftool".

* da/difftool:
  difftool: add a missing space to the run_dir_diff() comments
  difftool: remove an unnecessary call to strbuf_release()
  difftool: refactor dir-diff to write files using helper functions
  difftool: create a tmpdir path without repeated slashes
2021-10-11 10:21:48 -07:00
Junio C Hamano 404c4a5462 Merge branch 'ab/designated-initializers'
Code clean-up.

* ab/designated-initializers:
  cbtree.h: define cb_init() in terms of CBTREE_INIT
  *.h: move some *_INIT to designated initializers
  *.h _INIT macros: don't specify fields equal to 0
  *.[ch] *_INIT macros: use { 0 } for a "zero out" idiom
  submodule-config.h: remove unused SUBMODULE_INIT macro
2021-10-11 10:21:48 -07:00
Junio C Hamano f6c075ad71 Merge branch 'jk/ref-paranoia'
The ref iteration code used to optionally allow dangling refs to be
shown, which has been tightened up.

* jk/ref-paranoia:
  refs: drop "broken" flag from for_each_fullref_in()
  ref-filter: drop broken-ref code entirely
  ref-filter: stop setting FILTER_REFS_INCLUDE_BROKEN
  repack, prune: drop GIT_REF_PARANOIA settings
  refs: turn on GIT_REF_PARANOIA by default
  refs: omit dangling symrefs when using GIT_REF_PARANOIA
  refs: add DO_FOR_EACH_OMIT_DANGLING_SYMREFS flag
  refs-internal.h: reorganize DO_FOR_EACH_* flag documentation
  refs-internal.h: move DO_FOR_EACH_* flags next to each other
  t5312: be more assertive about command failure
  t5312: test non-destructive repack
  t5312: create bogus ref as necessary
  t5312: drop "verbose" helper
  t5600: provide detached HEAD for corruption failures
  t5516: don't use HEAD ref for invalid ref-deletion tests
  t7900: clean up some more broken refs
2021-10-11 10:21:47 -07:00
Junio C Hamano 9567a670d2 Merge branch 'tb/midx-write-propagate-namehash'
"git multi-pack-index write --bitmap" learns to propagate the
hashcache from original bitmap to resulting bitmap.

* tb/midx-write-propagate-namehash:
  t5326: test propagating hashcache values
  p5326: generate pack bitmaps before writing the MIDX bitmap
  p5326: don't set core.multiPackIndex unnecessarily
  p5326: create missing 'perf-tag' tag
  midx.c: respect 'pack.writeBitmapHashcache' when writing bitmaps
  pack-bitmap.c: propagate namehash values from existing bitmaps
  t/helper/test-bitmap.c: add 'dump-hashes' mode
2021-10-11 10:21:46 -07:00
Junio C Hamano 844cc43377 Merge branch 'tb/commit-graph-usage-fix'
Regression in "git commit-graph" command line parsing has been
corrected.

* tb/commit-graph-usage-fix:
  builtin/multi-pack-index.c: disable top-level --[no-]progress
  builtin/commit-graph.c: don't accept common --[no-]progress
2021-10-06 13:40:11 -07:00
Junio C Hamano 7cebe73dbd Merge branch 'pw/rebase-of-a-tag-fix'
"git rebase <upstream> <tag>" failed when aborted in the middle, as
it mistakenly tried to write the tag object instead of peeling it
to HEAD.

* pw/rebase-of-a-tag-fix:
  rebase: dereference tags
  rebase: use lookup_commit_reference_by_name()
  rebase: use our standard error return value
  t3407: rework rebase --quit tests
  t3407: strengthen rebase --abort tests
  t3407: use test_path_is_missing
  t3407: rename a variable
  t3407: use test_cmp_rev
  t3407: use test_commit
  t3407: run tests in $TEST_DIRECTORY
2021-10-06 13:40:11 -07:00
Junio C Hamano 921c795c25 Merge branch 'jt/add-submodule-odb-clean-up'
More code paths that use the hack to add submodule's object
database to the set of alternate object store have been cleaned up.

* jt/add-submodule-odb-clean-up:
  revision: remove "submodule" from opt struct
  repository: support unabsorbed in repo_submodule_init
  submodule: remove unnecessary unabsorbed fallback
2021-10-06 13:40:11 -07:00
Junio C Hamano 09bde81f29 Merge branch 'bs/difftool-msg-tweak'
Message tweak.

* bs/difftool-msg-tweak:
  difftool: fix word spacing in the usage strings
2021-10-03 21:49:21 -07:00
Junio C Hamano 0a2b53c2f2 Merge branch 'ab/bundle-remove-verbose-option'
Doc update.

* ab/bundle-remove-verbose-option:
  bundle: remove ignored & undocumented "--verbose" flag
2021-10-03 21:49:20 -07:00
Junio C Hamano 976d3f00d6 Merge branch 'bs/ls-files-opt-help-text-update'
Help text for "ls-files" options have been updated.

* bs/ls-files-opt-help-text-update:
  ls-files: use imperative mood for -X and -z option description
2021-10-03 21:49:19 -07:00
Junio C Hamano 6a4f5dadd3 Merge branch 'da/difftool-dir-diff-symlink-fix'
"git difftool --dir-diff" mishandled symbolic links.

* da/difftool-dir-diff-symlink-fix:
  difftool: fix symlink-file writing in dir-diff mode
2021-10-03 21:49:19 -07:00
Junio C Hamano 842d45d293 Merge branch 'ab/refs-files-cleanup'
Continued work on top of the hn/refs-errno-cleanup topic.

* ab/refs-files-cleanup:
  refs/files: remove unused "errno != ENOTDIR" condition
  refs/files: remove unused "errno == EISDIR" code
  refs/files: remove unused "oid" in lock_ref_oid_basic()
  refs API: remove OID argument to reflog_expire()
  reflog expire: don't lock reflogs using previously seen OID
  refs/files: add a comment about refs_reflog_exists() call
  refs: make repo_dwim_log() accept a NULL oid
  refs/debug: re-indent argument list for "prepare"
  refs/files: remove unused "skip" in lock_raw_ref() too
  refs/files: remove unused "extras/skip" in lock_ref_oid_basic()
  refs: drop unused "flags" parameter to lock_ref_oid_basic()
  refs/files: remove unused REF_DELETING in lock_ref_oid_basic()
  refs/packet: add missing BUG() invocations to reflog callbacks
2021-10-03 21:49:18 -07:00
Junio C Hamano ac162a606b Merge branch 'jk/clone-unborn-head-in-bare'
"git clone" from a repository whose HEAD is unborn into a bare
repository didn't follow the branch name the other side used, which
is corrected.

* jk/clone-unborn-head-in-bare:
  clone: handle unborn branch in bare repos
2021-10-03 21:49:17 -07:00
Junio C Hamano 4a6fd7d3c7 Merge branch 'en/stash-df-fix'
"git stash", where the tentative change involves changing a
directory to a file (or vice versa), was confused, which has been
corrected.

* en/stash-df-fix:
  stash: restore untracked files AFTER restoring tracked files
  stash: avoid feeding directories to update-index
  t3903: document a pair of directory/file bugs
2021-10-03 21:49:16 -07:00
Bagas Sanjaya 273c9c5777 bisect--helper: add space between colon and following sentence
Add missing space between colon sentence (`bisect-run failed:`) and the
following sentence (`git bisect--helper --bisect-state`).

Fixes: d1bbbe45df (bisect--helper: reimplement `bisect_run` shell
function in C, 2021-09-13)
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-10-01 15:47:53 -07:00
David Aguilar 28c10ecbfc difftool: add a missing space to the run_dir_diff() comments
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-30 18:48:51 -07:00
David Aguilar 8e2af8f0db difftool: remove an unnecessary call to strbuf_release()
The `buf` strbuf is reused again later in the same function, so there
is no benefit to calling strbuf_release(). The subsequent usage is
already using strbuf_reset() to reset the buffer, so releasing it
early is only going to lead to a wasteful reallocation.

Remove the early call to strbuf_release(). The same strbuf is already
cleaned up in the "finish:" section so nothing is leaked, either.

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-30 18:48:51 -07:00
David Aguilar 2255c80c91 difftool: refactor dir-diff to write files using helper functions
Add a helpers function to handle the unlinking and writing
of the dir-diff submodule and symlink stand-in files.

Use the helpers to implement the guts of the hashmap loops.
This eliminate duplicate code and safeguards the submodules
hashmap loop against the symlink-chasing behavior that 5bafb3576a
(difftool: fix symlink-file writing in dir-diff mode, 2021-09-22)
addressed.

The submodules loop should not strictly require the unlink() call that
this is introducing to them, but it does not necessarily hurt them
either beyond the cost of the extra unlink().

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-30 18:48:51 -07:00
David Aguilar 4ac9f15492 difftool: create a tmpdir path without repeated slashes
The paths generated by difftool are passed to user-facing diff tools.
Using paths with repeated slashes in them is a cosmetic blemish that
is exposed to users and can be avoided.

Use a strbuf to create the buffer used for the dir-diff tmpdir.
Strip trailing slashes from the value read from TMPDIR to avoid
repeated slashes in the generated paths.

Adjust the error handling to avoid leaking strbufs and to avoid
returning -1 to cmd_main().

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-30 18:48:51 -07:00
Derrick Stolee 93d2c16041 mv: refuse to move sparse paths
Since cmd_mv() does not operate on cache entries and instead directly
checks the filesystem, we can only use path_in_sparse_checkout() as a
mechanism for seeing if a path is sparse or not. Be sure to skip
returning a failure if '-k' is specified.

To ensure that the advice around sparse paths is the only reason a move
failed, be sure to check this as the very last thing before inserting
into the src_for_dst list.

The tests cover a variety of cases such as whether the target is tracked
or untracked, and whether the source or destination are in or outside of
the sparse-checkout definition.

Helped-by: Matheus Tavares Bernardino <matheus.bernardino@usp.br>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee d7c4415e55 rm: skip sparse paths with missing SKIP_WORKTREE
If a path does not match the sparse-checkout cone but is somehow missing
the SKIP_WORKTREE bit, then 'git rm' currently succeeds in removing the
file. One reason a user might be in this situation is a merge conflict
outside of the sparse-checkout cone. Removing such a file might be
problematic for users who are not sure what they are doing.

Add a check to path_in_sparse_checkout() when 'git rm' is checking if a
path should be considered for deletion. Of course, this check is ignored
if the '--sparse' option is specified, allowing users who accept the
risks to continue with the removal.

This also removes a confusing behavior where a user asks for a directory
to be removed, but only the entries that are within the sparse-checkout
definition are removed. Now, 'git rm <dir>' will fail without '--sparse'
and will succeed in removing all contained paths with '--sparse'.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee f9786f9b85 rm: add --sparse option
As we did previously in 'git add', add a '--sparse' option to 'git rm'
that allows modifying paths outside of the sparse-checkout definition.
The existing checks in 'git rm' are restricted to tracked files that
have the SKIP_WORKTREE bit in the current index. Future changes will
cause 'git rm' to reject removing paths outside of the sparse-checkout
definition, even if they are untracked or do not have the SKIP_WORKTREE
bit.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee 61d450f049 add: update --renormalize to skip sparse paths
We added checks for path_in_sparse_checkout() to portions of 'git add'
that add warnings and prevent stagins a modification, but we skipped the
--renormalize mode. Update renormalize_tracked_files() to ignore cache
entries whose path is outside of the sparse-checkout cone (unless
--sparse is provided). Add a test in t3705.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee 63b60b3add add: update --chmod to skip sparse paths
We added checks for path_in_sparse_checkout() to portions of 'git add'
that add warnings and prevent staging a modification, but we skipped the
--chmod mode. Update chmod_pathspec() to ignore cache entries whose path
is outside of the sparse-checkout cone (unless --sparse is provided).
Add a test in t3705.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee 0299a69694 add: implement the --sparse option
We previously modified 'git add' to refuse updating index entries
outside of the sparse-checkout cone. This is justified to prevent users
from accidentally getting into a confusing state when Git removes those
files from the working tree at some later point.

Unfortunately, this caused some workflows that were previously possible
to become impossible, especially around merge conflicts outside of the
sparse-checkout cone. These were documented in tests within t1092.

We now re-enable these workflows using a new '--sparse' option to 'git
add'. This allows users to signal "Yes, I do know what I'm doing with
these files," and accept the consequences of the files leaving the
worktree later.

We delay updating the advice message until implementing a similar option
in 'git rm' and 'git mv'.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee 49fdd51a23 add: skip tracked paths outside sparse-checkout cone
When 'git add' adds a tracked file that is outside of the
sparse-checkout cone, it checks the SKIP_WORKTREE bit to see if the file
exists outside of the sparse-checkout cone. This is usually correct,
except in the case of a merge conflict outside of the cone.

Modify add_pathspec_matched_against_index() to be more careful about
paths by checking the sparse-checkout patterns in addition to the
SKIP_WORKTREE bit. This causes 'git add' to no longer allow files
outside of the cone that removed the SKIP_WORKTREE bit due to a merge
conflict.

With only this change, users will only be able to add the file after
adding the file to the sparse-checkout cone. A later change will allow
users to force adding even though the file is outside of the
sparse-checkout cone.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Derrick Stolee 105e8b014b add: fail when adding an untracked sparse file
The add_files() method in builtin/add.c takes a set of untracked files
that are being added by the input pathspec and inserts them into the
index. If these files are outside of the sparse-checkout cone, then they
gain the SKIP_WORKTREE bit at some point. However, this was not checked
before inserting into the index, so these files are added even though we
want to avoid modifying the index outside of the sparse-checkout cone.

Add a check within add_files() for these files and write the advice
about files outside of the sparse-checkout cone.

This behavior change modifies some existing tests within t1092. These
tests intended to document how a user could interact with the existing
behavior in place. Many of these tests need to be marked as expecting
failure. A future change will allow these tests to pass by adding a flag
to 'git add' that allows users to modify index entries outside of the
sparse-checkout cone.

The 'submodule handling' test is intended to document what happens to
directories that contain a submodule when the sparse index is enabled.
It is not trying to say that users should be able to add submodules
outside of the sparse-checkout cone, so that test can be modified to
avoid that operation.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-28 10:31:02 -07:00
Ævar Arnfjörð Bjarmason f69a6e4f07 *.h: move some *_INIT to designated initializers
Move various *_INIT macros to use designated initializers. This helps
readability. I've only picked those leftover macros that were not
touched by another in-flight series of mine which changed others, but
also how initialization was done.

In the case of SUBMODULE_ALTERNATE_SETUP_INIT I've left an explicit
initialization of "error_mode", even though
SUBMODULE_ALTERNATE_ERROR_IGNORE itself is defined as "0". Let's not
peek under the hood and assume that enum fields we know the value of
will stay at "0".

The change to "TESTSUITE_INIT" in "t/helper/test-run-command.c" was
part of an earlier on-list version[1] of c90be786da (test-tool
run-command: fix flip-flop init pattern, 2021-09-11).

1. https://lore.kernel.org/git/patch-1.1-0aa4523ab6e-20210909T130849Z-avarab@gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 14:48:00 -07:00
Ævar Arnfjörð Bjarmason 9865b6e6a4 *.[ch] *_INIT macros: use { 0 } for a "zero out" idiom
In C it isn't required to specify that all members of a struct are
zero'd out to 0, NULL or '\0', just providing a "{ 0 }" will
accomplish that.

Let's also change code that provided N zero'd fields to just
provide one, and change e.g. "{ NULL }" to "{ 0 }" for
consistency. I.e. even if the first member is a pointer let's use "0"
instead of "NULL". The point of using "0" consistently is to pick one,
and to not have the reader wonder why we're not using the same pattern
everywhere.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 14:47:59 -07:00
Elijah Newren 94b7f1563a Comment important codepaths regarding nuking untracked files/dirs
In the last few commits we focused on code in unpack-trees.c that
mistakenly removed untracked files or directories.  There may be more of
those, but in this commit we change our focus: callers of toplevel
commands that are expected to remove untracked files or directories.

As noted previously, we have toplevel commands that are expected to
delete untracked files such as 'read-tree --reset', 'reset --hard', and
'checkout --force'.  However, that does not mean that other highlevel
commands that happen to call these other commands thought about or
conveyed to users the possibility that untracked files could be removed.
Audit the code for such callsites, and add comments near existing
callsites to mention whether these are safe or not.

My auditing is somewhat incomplete, though; it skipped several cases:
  * git-rebase--preserve-merges.sh: is in the process of being
    deprecated/removed, so I won't leave a note that there are
    likely more bugs in that script.
  * contrib/git-new-workdir: why is the -f flag being used in a new
    empty directory??  It shouldn't hurt, but it seems useless.
  * git-p4.py: Don't see why -f is needed for a new dir (maybe it's
    not and is just superfluous), but I'm not at all familiar with
    the p4 stuff
  * git-archimport.perl: Don't care; arch is long since dead
  * git-cvs*.perl: Don't care; cvs is long since dead

Also, the reset --hard in builtin/worktree.c looks safe, due to only
running in an empty directory.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00
Elijah Newren 480d3d6bf9 Change unpack_trees' 'reset' flag into an enum
Traditionally, unpack_trees_options->reset was used to signal that it
was okay to delete any untracked files in the way.  This was used by
`git read-tree --reset`, but then started appearing in other places as
well.  However, many of the other uses should not be deleting untracked
files in the way.  Change this value to an enum so that a value of 1
(i.e. "true") can be split into two:
   UNPACK_RESET_PROTECT_UNTRACKED,
   UNPACK_RESET_OVERWRITE_UNTRACKED
In order to catch accidental misuses (i.e. where folks call it the way
they traditionally used to), define the special enum value of
   UNPACK_RESET_INVALID = 1
which will trigger a BUG().

Modify existing callers so that
   read-tree --reset
   reset --hard
   checkout --force
continue using the UNPACK_RESET_OVERWRITE_UNTRACKED logic, while other
callers, including
   am
   checkout without --force
   stash  (though currently dead code; reset always had a value of 0)
   numerous callers from rebase/sequencer to reset_head()
will use the new UNPACK_RESET_PROTECT_UNTRACKED value.

Also, note that it has been reported that 'git checkout <treeish>
<pathspec>' currently also allows overwriting untracked files[1].  That
case should also be fixed, but it does not use unpack_trees() and thus
is outside the scope of the current changes.

[1] https://lore.kernel.org/git/15dad590-087e-5a48-9238-5d2826950506@gmail.com/

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00
Elijah Newren 1b5f37334a Remove ignored files by default when they are in the way
Change several commands to remove ignored files by default when they are
in the way.  Since some commands (checkout, merge) take a
--no-overwrite-ignore option to allow the user to configure this, and it
may make sense to add that option to more commands (and in the case of
merge, actually plumb that configuration option through to more of the
backends than just the fast-forwarding special case), add little
comments about where such flags would be used.

Incidentally, this fixes a test failure in t7112.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00
Elijah Newren 04988c8d18 unpack-trees: introduce preserve_ignored to unpack_trees_options
Currently, every caller of unpack_trees() that wants to ensure ignored
files are overwritten by default needs to:
   * allocate unpack_trees_options.dir
   * flip the DIR_SHOW_IGNORED flag in unpack_trees_options.dir->flags
   * call setup_standard_excludes
AND then after the call to unpack_trees() needs to
   * call dir_clear()
   * deallocate unpack_trees_options.dir
That's a fair amount of boilerplate, and every caller uses identical
code.  Make this easier by instead introducing a new boolean value where
the default value (0) does what we want so that new callers of
unpack_trees() automatically get the appropriate behavior.  And move all
the handling of unpack_trees_options.dir into unpack_trees() itself.

While preserve_ignored = 0 is the behavior we feel is the appropriate
default, we defer fixing commands to use the appropriate default until a
later commit.  So, this commit introduces several locations where we
manually set preserve_ignored=1.  This makes it clear where code paths
were previously preserving ignored files when they should not have been;
a future commit will flip these to instead use a value of 0 to get the
behavior we want.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00
Elijah Newren 491a7575f1 read-tree, merge-recursive: overwrite ignored files by default
This fixes a long-standing patchwork of ignored files handling in
read-tree and merge-recursive, called out and suggested by Junio long
ago.  Quoting from commit dcf0c16ef1 ("core.excludesfile clean-up"
2007-11-16):

    git-read-tree takes --exclude-per-directory=<gitignore>,
    not because the flexibility was needed.  Again, this was
    because the option predates the standardization of the ignore
    files.

    ...

    On the other hand, I think it makes perfect sense to fix
    git-read-tree, git-merge-recursive and git-clean to follow the
    same rule as other commands.  I do not think of a valid use case
    to give an exclude-per-directory that is nonstandard to
    read-tree command, outside a "negative" test in the t1004 test
    script.

    This patch is the first step to untangle this mess.

    The next step would be to teach read-tree, merge-recursive and
    clean (in C) to use setup_standard_excludes().

History shows each of these were partially or fully fixed:

  * clean was taught the new trick in 1617adc7a0 ("Teach git clean to
    use setup_standard_excludes()", 2007-11-14).

  * read-tree was primarily used by checkout & merge scripts.  checkout
    and merge later became builtins and were both fixed to use the new
    setup_standard_excludes() handling in fc001b526c ("checkout,merge:
    loosen overwriting untracked file check based on info/exclude",
    2011-11-27).  So the primary users were fixed, though read-tree
    itself was not.

  * merge-recursive has now been replaced as the default merge backend
    by merge-ort.  merge-ort fixed this by using
    setup_standard_excludes() starting early in its implementation; see
    commit 6681ce5cf6 ("merge-ort: add implementation of checkout()",
    2020-12-13), largely due to its design depending on checkout() and
    thus being influenced by the checkout code.  However,
    merge-recursive itself was not fixed here, in part because its
    design meant it had difficulty differentiating between untracked
    files, ignored files, leftover tracked files that haven't been
    removed yet due to order of processing files, and files written by
    itself due to collisions).

Make the conversion more complete by now handling read-tree and
handling at least the unpack_trees() portion of merge-recursive.  While
merge-recursive is on its way out, fixing the unpack_trees() portion is
easy and facilitates some of the later changes in this series.  Note
that fixing read-tree makes the --exclude-per-directory option to
read-tree useless, so we remove it from the documentation (though we
continue to accept it if passed).

The read-tree changes happen to fix a bug in t1013.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00
Elijah Newren c512d27e78 checkout, read-tree: fix leak of unpack_trees_options.dir
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 13:38:37 -07:00
Jeff King 67985e4e4a refs: drop "broken" flag from for_each_fullref_in()
No callers pass in anything but "0" here. Likewise to our sibling
functions. Note that some of them ferry along the flag, but none of
their callers pass anything but "0" either.

Nor is anybody likely to change that. Callers which really want to see
all of the raw refs use for_each_rawref(). And anybody interested in
iterating a subset of the refs will likely be happy to use the
now-default behavior of showing broken refs, but omitting dangling
symlinks.

So we can get rid of this whole feature.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 12:36:45 -07:00
Jeff King 1763334caf ref-filter: stop setting FILTER_REFS_INCLUDE_BROKEN
Of the ref-filter callers, for-each-ref and git-branch both set the
INCLUDE_BROKEN flag (but git-tag does not, which is a weird
inconsistency).  But now that GIT_REF_PARANOIA is on by default, that
produces almost the same outcome for all three.

The one exception is that GIT_REF_PARANOIA will omit dangling symrefs.
That's a better behavior for these tools, as they would never include
such a symref in the main output anyway (they can't, as it doesn't point
to an object). Instead they issue a warning to stderr. But that warning
is somewhat useless; a dangling symref is a perfectly reasonable thing
to have in your repository, and is not a sign of corruption. It's much
friendlier to just quietly ignore it.

And in terms of robustness, the warning gains us little. It does not
impact the exit code of either tool. So while the warning _might_ clue
in a user that they have an unexpected broken symref, it would not help
any kind of scripted use.

This patch converts for-each-ref and git-branch to stop using the
INCLUDE_BROKEN flag. That gives them more reasonable behavior, and
harmonizes them with git-tag.

We have to change one test to adapt to the situation. t1430 tries to
trigger all of the REF_ISBROKEN behaviors from the underlying ref code.
It uses for-each-ref to do so (because there isn't any other mechanism).
That will no longer issue a warning about the symref which points to an
invalid name, as it's considered dangling (and we can instead be sure
that it's _not_ mentioned on stderr). Note that we do still complain
about the illegally named "broken..symref"; its problem is not that it's
dangling, but the name of the symref itself is illegal.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 12:36:45 -07:00
Jeff King 5d1f5b8cd4 repack, prune: drop GIT_REF_PARANOIA settings
Now that GIT_REF_PARANOIA is the default, we don't need to selectively
enable it for destructive operations. In fact, it's harmful to do so,
because it overrides any GIT_REF_PARANOIA=0 setting that the user may
have provided (because they're trying to work around some corruption).

With these uses gone, we can further clean up the ref_paranoia global,
and make it a static variable inside the refs code.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 12:36:45 -07:00
Ævar Arnfjörð Bjarmason cfe853e66b hook-list.h: add a generated list of hooks, like config-list.h
Make githooks(5) the source of truth for what hooks git supports, and
punt out early on hooks we don't know about in find_hook(). This
ensures that the documentation and the C code's idea about existing
hooks doesn't diverge.

We still have Perl and Python code running its own hooks, but that'll
be addressed by Emily Shaffer's upcoming "git hook run" command.

This resolves a long-standing TODO item in bugreport.c of there being
no centralized listing of hooks, and fixes a bug with the bugreport
listing only knowing about 1/4 of the p4 hooks. It didn't know about
the recent "reference-transaction" hook either.

We could make the find_hook() function die() or BUG() out if the new
known_hook() returned 0, but let's make it return NULL just as it does
when it can't find a hook of a known type. Making it die() is overly
anal, and unlikely to be what we need in catching stupid typos in the
name of some new hook hardcoded in git.git's sources. By making this
be tolerant of unknown hook names, changes in a later series to make
"git hook run" run arbitrary user-configured hook names will be easier
to implement.

I have not been able to directly test the CMake change being made
here. Since 4c2c38e800 (ci: modification of main.yml to use cmake for
vs-build job, 2020-06-26) some of the Windows CI has a hard dependency
on CMake, this change works there, and is to my eyes an obviously
correct use of a pattern established in previous CMake changes,
namely:

 - 061c2240b1 (Introduce CMake support for configuring Git,
    2020-06-12)
 - 709df95b78 (help: move list_config_help to builtin/help,
    2020-04-16)
 - 976aaedca0 (msvc: add a Makefile target to pre-generate the Visual
   Studio solution, 2019-07-29)

The LC_ALL=C is needed because at least in my locale the dash ("-") is
ignored for the purposes of sorting, which results in a different
order. I'm not aware of anything in git that has a hard dependency on
the order, but e.g. the bugreport output would end up using whatever
locale was in effect when git was compiled.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Helped-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 09:44:54 -07:00
Ævar Arnfjörð Bjarmason 07a348e746 hook.c users: use "hook_exists()" instead of "find_hook()"
Use the new hook_exists() function instead of find_hook() where the
latter was called in boolean contexts. This make subsequent changes in
a series where we further refactor the hook API clearer, as we won't
conflate wanting to get the path of the hook with checking for its
existence.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 09:44:54 -07:00
Emily Shaffer 330155ed8a hook.c: add a hook_exists() wrapper and use it in bugreport.c
Add a boolean version of the find_hook() function for those callers
who are only interested in checking whether the hook exists, not what
the path to it is.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 09:44:54 -07:00
Ævar Arnfjörð Bjarmason 5e3aba33da hook.[ch]: move find_hook() from run-command.c to hook.c
Move the find_hook() function from run-command.c to a new hook.c
library. This change establishes a stub library that's pretty
pointless right now, but will see much wider use with Emily Shaffer's
upcoming "configuration-based hooks" series.

Eventually all the hook related code will live in hook.[ch]. Let's
start that process by moving the simple find_hook() function over
as-is.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 09:44:54 -07:00
Ævar Arnfjörð Bjarmason f188160be9 bundle: remove ignored & undocumented "--verbose" flag
In 73c3253d75 (bundle: framework for options before bundle file,
2019-11-10) the "git bundle" command was refactored to use
parse_options(). In that refactoring it started understanding the
"--verbose" flag before the subcommand, e.g.:

    git bundle --verbose verify --quiet

However, nothing ever did anything with this "verbose" variable, and
the change wasn't documented. It appears to have been something that
escaped the lab, and wasn't flagged by reviewers at the time. Let's
just remove it.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-23 15:03:48 -07:00