Commit Graph

17043 Commits

Author SHA1 Message Date
Junio C Hamano
11f433f79c Merge branch 'en/dir-nonbare-embedded'
"ls-files -o" mishandled the top-level directory of another git
working tree that hangs in the current git working tree.

* en/dir-nonbare-embedded:
  dir: avoid prematurely marking nonbare repositories as matches
  t3000: fix some test description typos
2020-08-24 14:54:29 -07:00
Junio C Hamano
9e8c7542cb Merge branch 'ds/midx-repack-to-batch-size'
The "--batch-size" option of "git multi-pack-index repack" command
is now used to specify that very small packfiles are collected into
one until the total size roughly exceeds it.

* ds/midx-repack-to-batch-size:
  multi-pack-index: repack batches below --batch-size
2020-08-24 14:54:28 -07:00
Junio C Hamano
a654836d96 Merge branch 'es/init-no-separate-git-dir-in-bare'
The purpose of "git init --separate-git-dir" is to initialize a
new project with the repository separate from the working tree,
or, in the case of an existing project, to move the repository
(the .git/ directory) out of the working tree. It does not make
sense to use --separate-git-dir with a bare repository for which
there is no working tree, so disallow its use with bare
repositories.

* es/init-no-separate-git-dir-in-bare:
  init: disallow --separate-git-dir with bare repository
2020-08-24 14:54:28 -07:00
René Scharfe
bfda204ade checkout, restore: make pathspec recursive
The pathspec given to git checkout and git restore is used with both
tree_entry_interesting (via read_tree_recursive) and match_pathspec
(via ce_path_match).  The latter effectively only supports recursive
matching regardless of the value of the pathspec flag "recursive",
which is unset here.

That causes different match results for pathspecs with wildcards, and
can lead checkout and restore in no-overlay mode to remove entries
instead of modifying them.  Enable recursive matching for both checkout
and restore to make matching consistent.

Setting the flag in checkout_main() technically also affects git switch,
but since that command doesn't accept pathspecs at all this has no
actual consequence.

Reported-by: Sergii Shkarnikov <sergii.shkarnikov@globallogic.com>
Initial-test-by: Sergii Shkarnikov <sergii.shkarnikov@globallogic.com>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-22 13:37:43 -07:00
Junio C Hamano
9ed104e5ca ident: say whose identity is missing when giving user.name hint
If `user.name` and `user.email` have not been configured and the
user invokes:

    git commit --author=...

without specifying the committer identity, then Git errors out with
a message asking the user to configure `user.name` and `user.email`
but doesn't tell the user which attribution was missing. This can be
confusing for a user new to Git who isn't aware of the distinction
between user, author, and committer.

Give such users a bit more help by extending the error message to
also say which attribution is expected.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 15:35:47 -07:00
Hariom Verma
2c22e102f8 ref-filter: 'contents:trailers' show error if : is missing
The 'contents' atom does not show any error if used with 'trailers'
atom and colon is missing before trailers arguments.

e.g %(contents:trailersonly) works, while it shouldn't.

It is definitely not an expected behavior.

Let's fix this bug.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Heba Waly <heba.waly@gmail.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 14:46:22 -07:00
Đoàn Trần Công Danh
3046c7f69a diff: index-line: respect --abbrev in object's name
A handful of Git's commands respect `--abbrev' for customizing length
of abbreviation of object names.

For diff-family, Git supports 2 different options for 2 different
purposes, `--full-index' for showing diff-patch object's name in full,
and `--abbrev' to customize the length of object names in diff-raw and
diff-tree header lines, without any options to customise the length of
object names in diff-patch format. When working with diff-patch format,
we only have two options, either full index, or default abbrev length.

Although, that behaviour is documented, it doesn't stop users from
trying to use `--abbrev' with the hope of customising diff-patch's
objects' name's abbreviation.

Let's allow the blob object names shown on the "index" line to be
abbreviated to arbitrary length given via the "--abbrev" option.

To preserve backward compatibility with old script that specify both
`--full-index' and `--abbrev', always show full object id
if `--full-index' is specified.

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 12:43:05 -07:00
brian m. carlson
fc7e73d7ef t4013: improve diff-post-processor logic
From 72f936b1 (t4013: make test hash independent, 2020-02-07),
we started to adjust metadata of git-diff's output in order to
ignore uninteresting metadata which is dependent of underlying hash
algorithm.

However, we forgot to special case all-zero object names, which is
special for missing objects, in consequence, we could't catch
possible future bugs where object names is all-zeros including but
not limited to:
* show intend-to-add entry
* deleted entry
* diff between index and working tree with new file

We also mistakenly munged file-modes as if they were object names
abbreviated to 6 hexadecimal digits.

In addition, in the upcoming change, we would like to test for
customizing the length of abbreviated blob objects on the index line,
which is not supported by current diff-processor logic.

Let's fix the bug for all-zero object names, and file modes.
While we're at it, support abbreviation of object names up to 16 bytes.

Based-on-patch-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 12:43:05 -07:00
Hariom Verma
a8e0f50edc t6300: unify %(trailers) and %(contents:trailers) tests
Currently, there are different tests for testing %(trailers) and
%(contents:trailers) causing redundant copy.

Its time to get rid of duplicate code.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Heba Waly <heba.waly@gmail.com>
Signed-off-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 12:13:26 -07:00
Jeff King
218389b9f3 p5302: count up to online-cpus for thread tests
When PERF_EXTRA is enabled, p5302 checks the performance of index-pack
with various numbers of threads. This can be useful for deciding what
the default should be (which is currently capped at 3 threads based on
the results of this script).

However, we only go up to 8 threads, and modern machines may have more.
Let's get the number of CPUs from test-tool, and test various numbers of
threads between one and that maximum.

Note that the current tests aren't all identical, as we have to set
GIT_FORCE_THREADS for the --threads=1 test (which measures the overhead
of starting a single worker thread versus the "0" case of using the main
thread). To keep the loop simple, we'll keep the "0" case out of it, and
set GIT_FORCE_THREADS=1 for all of the other cases (it's a noop for all
but the "1" case, since numbers higher than 1 would always need
threads).

Note also that we could skip running "test-tool" if PERF_EXTRA isn't
set. However, there's some small value in knowing the number of threads,
so that we can mark each test as skipped in the output.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 12:02:36 -07:00
Jeff King
47274251a4 p5302: disable thread-count parameter tests by default
The primary function of the perf suite is to detect regressions (or
improvements) between versions of Git. The only numbers we show a direct
comparison for are timings between the same test run on two different
versions.

However, it can sometimes be used to collect other information.  For
instance, p5302 runs the same index-pack operation with different thread
counts. The output doesn't directly compare these, but anybody
interested in working on index-pack can manually compare the results.

For a normal regression run of the full perf-suite, though, this incurs
a significant cost to generate numbers nobody will actually look at;
about 25% of the total time of the test suite is spent in p5302. And the
low-thread-count runs are the most expensive part of it, since they're
(unsurprisingly) not using as many threads.

Let's skip these tests by default, but make it possible for people
working on index-pack to still run them by setting an environment
variable. Rather than make this specific to p5302, let's introduce a
generic mechanism. This makes it possible to run the full suite with
every possible test if somebody really wants to burn some CPU.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 12:02:36 -07:00
Shourya Shukla
2a0d1a5ce2 t7401: add a NEEDSWORK
Add a NEEDSWORK regarding the outdated syntax and working of the test,
which may need to be improved to obtain better and desired results.

While at it, change the word 'test' to 'test script' in the test
description to avoid ambiguity.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 11:47:56 -07:00
Shourya Shukla
3a4fdeee89 t7401: change indentation for enhanced readability
Change the indentation of expected outputs for enhanced readability of
the tests. Also modify the heredoc string limiter in a test which lacks
it to support the indentation change.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Taylor Blau <me@taylorr.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 11:47:56 -07:00
Shourya Shukla
17c102e30d t7401: change syntax of test_i18ncmp calls for clarity
Change the test_i18ncmp syntax from 'test_i18ncmp actual expected' to
'test_i18ncmp expected actual' to align it with the convention followed
by other tests in the test script.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 11:47:55 -07:00
Shourya Shukla
7303da3002 t7401: use 'short' instead of 'verify' and cut in rev-parse calls
'git rev-parse' can limit the number of characters in the hash it
outputs using the '--short' option, thereby, making the 'cut' invocation
redundant. Since using '--short' implies '--verify' as well, we can
safely replace the latter with the former. This change results in the
helper functions getting the hash in the same way 'summary' gets the
hash internally.

So, avoid the unnecessary invocation to 'cut' in the helper
functions.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 11:47:55 -07:00
Shourya Shukla
94e06c9057 t7401: modernize style
The tests in 't7401-submodule-summary.sh' were written a long time ago
and has a violation with respect to our CodingGuidelines which is,
incorrect spacing in usages of the redirection operator.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Helped-by: Denton Liu <liu.denton@gmail.com>
Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-21 11:47:55 -07:00
Jonathan Tan
1b03df5f1e fetch-pack: in partial clone, pass --promisor
When fetching a pack from a promisor remote, the corresponding .promisor
file needs to be created. "fetch-pack" originally did this by passing
"--promisor" to "index-pack", but in 5374a290aa ("fetch-pack: write
fetched refs to .promisor", 2019-10-16), "fetch-pack" was taught to do
this itself instead, because it needed to store ref information in the
.promisor file.

This causes a problem with superprojects when transfer.fsckobjects is
set, because in the current implementation, it is "index-pack" that
calls fsck_finish() to check the objects; before 5374a290aa,
fsck_finish() would see that .gitmodules is a promisor object and
tolerate it being missing, but after, there is no .promisor file (at the
time of the invocation of fsck_finish() by "index-pack") to tell it that
.gitmodules is a promisor object, so it returns an error.

Therefore, teach "fetch-pack" to pass "--promisor" to index pack once
again. "fetch-pack" will subsequently overwrite this file with the ref
information.

An alternative is to instead move object checking to "fetch-pack", and
let "index-pack" only index the files. However, since "index-pack" has
to inflate objects in order to index them, it seems reasonable to also
let it check the objects (which also require inflated files).

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-20 13:18:27 -07:00
Matthew Rogers
1cf3d5db9b diff: teach --stat to ignore uninteresting modifications
When options such as --ignore-space-change are in use, files with
modifications can have no interesting textual changes worth showing.  In
such cases, "git diff --stat" shows 0 lines of additions and deletions.
Teach "git diff --stat" not to show such a path in its output, which
would be more natural.

However, we don't want to prevent the display  of all files that have 0
effective diffs since they could be the result of a rename, permission
change, or other similar operation that may still be of interest so we
special case additions and deletions as they are always interesting.

Signed-off-by: Matthew Rogers <mattr94@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-19 17:53:32 -07:00
Junio C Hamano
6f8a2138b9 Merge branch 'ds/sha256-leftover-bits'
midx and commit-graph files now use the byte defined in their file
format specification for identifying the hash function used for
object names.

* ds/sha256-leftover-bits:
  multi-pack-index: use hash version byte
  commit-graph: use the "hash version" byte
  t/README: document GIT_TEST_DEFAULT_HASH
2020-08-19 16:14:53 -07:00
Junio C Hamano
2a978f8273 Merge branch 'jc/object-names-are-not-sha-1'
A few end-user facing messages have been updated to be
hash-algorithm agnostic.

* jc/object-names-are-not-sha-1:
  messages: avoid SHA-1 in end-user facing messages
2020-08-19 16:14:52 -07:00
Junio C Hamano
b350c4debe Merge branch 'pb/userdiff-fortran-update'
The regexp to identify the function boundary for FORTRAN programs
has been updated.

* pb/userdiff-fortran-update:
  userdiff: improve Fortran xfuncname regex
  userdiff: add tests for Fortran xfuncname regex
2020-08-19 16:14:50 -07:00
Junio C Hamano
93121dfd8c Merge branch 'jk/blame-coalesce-fix'
When given more than one target line ranges, "git blame -La,b
-Lc,d" was over-eager to coalesce groups of original lines and
showed incorrect results, which has been corrected.

* jk/blame-coalesce-fix:
  blame: only coalesce lines that are adjacent in result
  t8003: factor setup out of coalesce test
  t8003: check output of coalesced blame
2020-08-19 16:14:49 -07:00
Junio C Hamano
4499a42d0c Merge branch 'ak/sequencer-fix-find-uniq-abbrev'
Ring buffer with size 4 used for bin-hex translation resulted in a
wrong object name in the sequencer's todo output, which has been
corrected.

* ak/sequencer-fix-find-uniq-abbrev:
  rebase -i: fix possibly wrong onto hash in todo
2020-08-19 16:14:48 -07:00
Junio C Hamano
6cceea19eb Merge branch 'en/sequencer-merge-labels'
The commit labels used to explain each side of conflicted hunks
placed by the sequencer machinery have been made more readable by
humans.

* en/sequencer-merge-labels:
  sequencer: avoid garbled merge machinery messages due to commit labels
2020-08-19 16:14:47 -07:00
Junio C Hamano
36d225c7d4 Merge branch 'en/merge-tests'
Updates to "git merge" tests, in preparation for a new merge
strategy backend.

* en/merge-tests:
  t6425: be more flexible with rename/delete conflict messages
  t642[23]: be more flexible for add/add conflicts involving pair renames
  t6422, t6426: be more flexible for add/add conflicts involving renames
  t6423: add an explanation about why one of the tests does not pass
  t6416, t6423: clarify some comments and fix some typos
  t6422: fix multiple errors with the mod6 test expectations
  t6423: fix test setup for a couple tests
  t6416, t6422: fix incorrect untracked file count
  t6422: fix bad check against missing file
  t6418: tighten delete/normalize conflict testcase
  Collect merge-related tests to t64xx
2020-08-19 16:14:43 -07:00
Rohit Ashiwal
27126692ba rebase: add --reset-author-date
The previous commit introduced --ignore-date flag to rebase -i, but the
name is rather vague as it does not say whether the author date or the
committer date is ignored. Add an alias to convey the precise purpose.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-19 15:22:56 -07:00
Phillip Wood
a3894aad67 rebase -i: support --ignore-date
Rebase is implemented with two different backends - 'apply' and
'merge' each of which support a different set of options. In
particular the apply backend supports a number of options implemented
by 'git am' that are not implemented in the merge backend. This means
that the available options are different depending on which backend is
used which is confusing. This patch adds support for the --ignore-date
option to the merge backend. This option uses the current time as the
author date rather than reusing the original author date when
rewriting commits. We take care to handle the combination of
--ignore-date and --committer-date-is-author-date in the same way as
the apply backend.

Original-patch-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-19 15:19:59 -07:00
Jonathan Tan
7ca3c0ac37 promisor-remote: lazy-fetch objects in subprocess
Teach Git to lazy-fetch missing objects in a subprocess instead of doing
it in-process. This allows any fatal errors that occur during the fetch
to be isolated and converted into an error return value, instead of
causing the current command being run to terminate.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-18 16:46:53 -07:00
René Scharfe
82a62015a7 patch-id: ignore newline at end of file in diff_flush_patch_id()
Whitespace is ignored when calculating patch IDs.  This is done by
removing all whitespace from diff lines before hashing them, including
a newline at the end of a file.  If that newline is missing, however,
diff reports that fact in a separate line containing "\ No newline at
end of file\n", and this marker is hashed like a context line.

This goes against our goal of making patch IDs independent of
whitespace.  Use the same heuristic that 2485eab55c (git-patch-id: do
not trip over "no newline" markers, 2011-02-17) added to git patch-id
instead and skip diff lines that start with a backslash and a space
and are longer than twelve characters.

Reported-by: Tilman Vogel <tilman.vogel@web.de>
Initial-test-by: Tilman Vogel <tilman.vogel@web.de>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-18 16:14:01 -07:00
Jonathan Tan
5c3b801dab fetch-pack: do not lazy-fetch during ref iteration
In order to determine negotiation tips, "fetch-pack" iterates over all
refs and dereferences all annotated tags found. This causes the
existence of targets of refs and annotated tags to be checked. Avoiding
this is especially important when we use "git fetch" (which invokes
"fetch-pack") to perform lazy fetches in a partial clone because a
target of such a ref or annotated tag may need to be itself lazy-fetched
(and otherwise causing an infinite loop).

Therefore, teach "fetch-pack" not to lazy fetch whenever iterating over
refs. This is done by using the raw form of ref iteration and by
dereferencing tags ourselves.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-18 13:25:05 -07:00
Jonathan Tan
cbe566a071 negotiator/noop: add noop fetch negotiator
Add a noop fetch negotiator. This is introduced to allow partial clones
to skip the unneeded negotiation step when fetching missing objects
using a "git fetch" subprocess. (The implementation of spawning a "git
fetch" subprocess will be done in a subsequent patch.) But this can also
be useful for end users, e.g. as a blunt fix for object corruption.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-18 13:25:05 -07:00
Junio C Hamano
887952b8c6 fetch: optionally allow disabling FETCH_HEAD update
If you run fetch but record the result in remote-tracking branches,
and either if you do nothing with the fetched refs (e.g. you are
merely mirroring) or if you always work from the remote-tracking
refs (e.g. you fetch and then merge origin/branchname separately),
you can get away with having no FETCH_HEAD at all.

Teach "git fetch" a command line option "--[no-]write-fetch-head".
The default is to write FETCH_HEAD, and the option is primarily
meant to be used with the "--no-" prefix to override this default,
because there is no matching fetch.writeFetchHEAD configuration
variable to flip the default to off (in which case, the positive
form may become necessary to defeat it).

Note that under "--dry-run" mode, FETCH_HEAD is never written;
otherwise you'd see list of objects in the file that you do not
actually have.  Passing `--write-fetch-head` does not force `git
fetch` to write the file.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-18 12:56:57 -07:00
Junio C Hamano
a555b514cd Merge branch 'so/log-diff-merges-opt'
Earlier, to countermand the implicit "-m" option when the
"--first-parent" option is used with "git log", we added the
"--[no-]diff-merges" option in the jk/log-fp-implies-m topic.  To
leave the door open to allow the "--diff-merges" option to take
values that instructs how patches for merge commits should be
computed (e.g. "cc"? "-p against first parent?"), redefine
"--diff-merges" to take non-optional value, and implement "off"
that means the same thing as "--no-diff-merges".

* so/log-diff-merges-opt:
  t/t4013: add test for --diff-merges=off
  doc/git-log: describe --diff-merges=off
  revision: change "--diff-merges" option to require parameter
2020-08-17 17:02:50 -07:00
Junio C Hamano
eca8c62a50 Merge branch 'jk/log-fp-implies-m'
"git log --first-parent -p" showed patches only for single-parent
commits on the first-parent chain; the "--first-parent" option has
been made to imply "-m".  Use "--no-diff-merges" to restore the
previous behaviour to omit patches for merge commits.

* jk/log-fp-implies-m:
  doc/git-log: clarify handling of merge commit diffs
  doc/git-log: move "-t" into diff-options list
  doc/git-log: drop "-r" diff option
  doc/git-log: move "Diff Formatting" from rev-list-options
  log: enable "-m" automatically with "--first-parent"
  revision: add "--no-diff-merges" option to counteract "-m"
  log: drop "--cc implies -m" logic
2020-08-17 17:02:49 -07:00
Junio C Hamano
07f14d31ab Merge branch 'es/test-cmp-typocatcher'
Test framework update.

* es/test-cmp-typocatcher:
  test_cmp: diagnose incorrect arguments
2020-08-17 17:02:47 -07:00
Junio C Hamano
ca81676a10 Merge branch 'rp/apply-cached-with-i-t-a'
Recent versions of "git diff-files" shows a diff between the index
and the working tree for "intent-to-add" paths as a "new file"
patch; "git apply --cached" should be able to take "git diff-files"
and should act as an equivalent to "git add" for the path, but the
command failed to do so for such a path.

* rp/apply-cached-with-i-t-a:
  t4140: test apply with i-t-a paths
  apply: make i-t-a entries never match worktree
  apply: allow "new file" patches on i-t-a entries
2020-08-17 17:02:46 -07:00
Junio C Hamano
47f0f94bc7 Merge branch 'al/bisect-first-parent'
"git bisect" learns the "--first-parent" option to find the first
breakage along the first-parent chain.

* al/bisect-first-parent:
  bisect: combine args passed to find_bisection()
  bisect: introduce first-parent flag
  cmd_bisect__helper: defer parsing no-checkout flag
  rev-list: allow bisect and first-parent flags
  t6030: modernize "git bisect run" tests
2020-08-17 17:02:45 -07:00
Junio C Hamano
95c687bf85 Merge branch 'hn/reftable-prep-part-2'
Further preliminary change to refs API.

* hn/reftable-prep-part-2:
  Make HEAD a PSEUDOREF rather than PER_WORKTREE.
  Modify pseudo refs through ref backend storage
  t1400: use git rev-parse for testing PSEUDOREF existence
2020-08-17 17:02:42 -07:00
Junio C Hamano
a00bda2b2f Merge branch 'dd/send-email-config'
Stop when "sendmail.*" configuration variables are defined, which
could be a mistaken attempt to define "sendemail.*" variables.

* dd/send-email-config:
  git-send-email: die if sendmail.* config is set
2020-08-17 17:02:41 -07:00
Junio C Hamano
5676db2612 Merge branch 'ps/ref-transaction-hook'
The logic to find the ref transaction hook script attempted to
cache the path to the found hook without realizing that it needed
to keep a copied value, as the API it used returned a transitory
buffer space.  This has been corrected.

* ps/ref-transaction-hook:
  t1416: avoid hard-coded sha1 ids
  refs: fix interleaving hook calls with reference-transaction hook
2020-08-17 17:02:41 -07:00
Derrick Stolee
d96075428a multi-pack-index: use hash version byte
Similar to the commit-graph format, the multi-pack-index format has a
byte in the header intended to track the hash version used to write the
file. This allows one to interpret the hash length without having the
context of the repository config specifying the hash length. This was
not modified as part of the SHA-256 work because the hash length was
automatically up-shifted due to that config.

Since we have this byte available, we can make the file formats more
obviously incompatible instead of relying on other context from the
repository.

Add a new oid_version() method in midx.c similar to the one in
commit-graph.c. This is specifically made separate from that
implementation to avoid artificially linking the formats.

The test impact requires a few more things than the corresponding change
in the commit-graph format. Specifically, 'test-tool read-midx' was not
writing anything about this header value to output. Since the value
available in 'struct multi_pack_index' is hash_len instead of a version
value, we output "20" or "32" instead of "1" or "2".

Since we want a user to not have their Git commands fail if their
multi-pack-index has the incorrect hash version compared to the
repository's hash version, we relax the die() to an error() in
load_multi_pack_index(). This has some effect on 'git multi-pack-index
verify' as we need to check that a failed parse of a file that exists is
actually a verify error. For that test that checks the hash version
matches, we change the corrupted byte from "2" to "3" to ensure the test
fails for both hash algorithms.

Helped-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-17 16:45:20 -07:00
Derrick Stolee
665d70ad03 commit-graph: use the "hash version" byte
The commit-graph format reserved a byte among the header of the file to
store a "hash version". During the SHA-256 work, this was not modified
because file formats are not necessarily intended to work across hash
versions. If a repository has SHA-256 as its hash algorithm, it
automatically up-shifts the lengths of object names in all necessary
formats.

However, since we have this byte available for adjusting the version, we
can make the file formats more obviously incompatible instead of relying
on other context from the repository.

Update the oid_version() method in commit-graph.c to add a new value, 2,
for sha-256. This automatically writes the new value in a SHA-256
repository _and_ verifies the value is correct. This is a breaking
change relative to the current 'master' branch since 092b677 (Merge
branch 'bc/sha-256-cvs-svn-updates', 2020-08-13) but it is not breaking
relative to any released version of Git.

The test impact is relatively minor: the output of 'test-tool
read-graph' lists the header information, so those instances of '1' need
to be replaced with a variable determined by GIT_TEST_DEFAULT_HASH. A
more careful test is added that specifically creates a repository of
each type then swaps the commit-graph files. The important value here is
that the "git log" command succeeds while writing a message to stderr.

Helped-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-17 16:45:14 -07:00
Derrick Stolee
f3d66ec871 t/README: document GIT_TEST_DEFAULT_HASH
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-17 16:44:56 -07:00
Phillip Wood
7573cec52c rebase -i: support --committer-date-is-author-date
Rebase is implemented with two different backends - 'apply' and
'merge' each of which support a different set of options. In
particular the apply backend supports a number of options implemented
by 'git am' that are not implemented in the merge backend. This means
that the available options are different depending on which backend is
used which is confusing. This patch adds support for the
--committer-date-is-author-date option to the merge backend. This
option uses the author date of the commit that is being rewritten as
the committer date when the new commit is created.

Original-patch-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-17 11:58:37 -07:00
Jeff King
f1de981e8b config: fix leaks from git_config_get_string_const()
There are two functions to get a single config string:

  - git_config_get_string()

  - git_config_get_string_const()

One might naively think that the first one allocates a new string and
the second one just points us to the internal configset storage. But
in fact they both allocate a new copy; the second one exists only to
avoid having to cast when using it with a const global which we never
intend to free.

The documentation for the function explains that clearly, but it seems
I'm not alone in being surprised by this. Of 17 calls to the function,
13 of them leak the resulting value.

We could obviously fix these by adding the appropriate free(). But it
would be simpler still if we actually had a non-allocating way to get
the string. There's git_config_get_value() but that doesn't quite do
what we want. If the config key is present but is a boolean with no
value (e.g., "[foo]bar" in the file), then we'll get NULL (whereas the
string versions will print an error and die).

So let's introduce a new variant, git_config_get_string_tmp(), that
behaves as these callers expect. We need a new name because we have new
semantics but the same function signature (so even if we converted the
four remaining callers, topics in flight might be surprised). The "tmp"
is because this value should only be held onto for a short time. In
practice it's rare for us to clear and refresh the configset,
invalidating the pointer, but hopefully the "tmp" makes callers think
about the lifetime. In each of the converted cases here the value only
needs to last within the local function or its immediate caller.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-14 10:52:04 -07:00
Elijah Newren
7d056deace sequencer: avoid garbled merge machinery messages due to commit labels
sequencer's get_message() exists to provide good labels on conflict
hunks; see commits
  d68565402a ("revert: clarify label on conflict hunks", 2010-03-20)
  bf975d379d ("cherry-pick, revert: add a label for ancestor", 2010-03-20)
  043a4492b3 ("sequencer: factor code out of revert builtin", 2012-01-11).
for background on this function.  These labels are of the form
  <commitID>... <commit summary>
or
  parent of <commitID>... <commit summary>
These labels are then passed as branch names to the merge machinery.
However, these labels, as formatted, often also serve to confuse.  For
example, if we have a rename involved in a content merge, then it
results in text such as the following:

    <<<<<<<< HEAD:foo.c
      int j;
    ========
      int counter;
    >>>>>>>> b01dface... Removed unnecessary stuff:bar.c

Or in various conflict messages, it can make it very difficult to read:

    CONFLICT (rename/delete): foo.c deleted in b01dface... Removed
    unnecessary stuff and renamed in HEAD.  Version HEAD of foo.c left
    in tree.

    CONFLICT (file location): dir1/foo.c added in b01dface... Removed
    unnecessary stuff inside a directory that was renamed in HEAD,
    suggesting it should perhaps be moved to dir2/foo.c.

Make a minor change to remove the ellipses and add parentheses around
the commit summary; this makes all three examples much easier to read:

    <<<<<<<< HEAD:foo.c
      int j;
    ========
      int counter;
    >>>>>>>> b01dface (Removed unnecessary stuff):bar.c

    CONFLICT (rename/delete): foo.c deleted in b01dface (Removed
    unnecessary stuff) and renamed in HEAD.  Version HEAD of foo.c left
    in tree.

    CONFLICT (file location): dir1/foo.c added in b01dface (Removed
    unnecessary stuff) inside a directory that was renamed in HEAD,
    suggesting it should perhaps be moved to dir2/foo.c.

Signed-off-by: Elijah Newren <newren@gmail.com>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-14 10:48:58 -07:00
Junio C Hamano
4279000d3e messages: avoid SHA-1 in end-user facing messages
There are still a handful mentions of SHA-1 when we meant the
(hexadecimal) object names in end-user facing messages.  Rewrite
them.

I was hoping that this can mostly be s/SHA-1/object name/, but
a few messages needed rephrasing to keep the result readable.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-14 09:33:37 -07:00
Junio C Hamano
0a41a89306 Merge branch 'ma/test-quote-cleanup'
Test cleanup.

* ma/test-quote-cleanup:
  t4104: modernize and simplify quoting
  t: don't spuriously close and reopen quotes
2020-08-13 14:13:39 -07:00
Junio C Hamano
d1a8a8979d Merge branch 'jt/has_object'
A new helper function has_object() has been introduced to make it
easier to mark object existence checks that do and don't want to
trigger lazy fetches, and a few such checks are converted using it.

* jt/has_object:
  fsck: do not lazy fetch known non-promisor object
  pack-objects: no fetch when allow-{any,promisor}
  apply: do not lazy fetch when applying binary
  sha1-file: introduce no-lazy-fetch has_object()
2020-08-13 14:13:39 -07:00
Antti Keränen
5da69c0dac rebase -i: fix possibly wrong onto hash in todo
'todo_list_write_to_file' may overwrite the static buffer, originating
from 'find_unique_abbrev', that was used to store the short commit hash
'c' for "# Rebase a..b onto c" message in the todo editor. This is
because the buffer that is returned from 'find_unique_abbrev' is valid
until 4 more calls to `find_unique_abbrev` are made.

As 'todo_list_write_to_file' calls 'find_unique_abbrev' for each rebased
commit, the hash for 'c' is overwritten if there are 4 or more commits
in the rebase. This behavior has been broken since its introduction.

Fix by storing the short onto commit hash in a different buffer that
remains valid, before calling 'todo_list_write_to_file'.

Found-by: Jussi Keränen <jussike@gmail.com>
Signed-off-by: Antti Keränen <detegr@rbx.email>
Acked-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-13 11:32:34 -07:00