Junio C Hamano [Fri, 29 Apr 2016 19:59:08 +0000 (12:59 -0700)]
Merge branch 'jk/push-client-deadlock-fix'
"git push" from a corrupt repository that attempts to push a large
number of refs deadlocked; the thread to relay rejection notices
for these ref updates blocked on writing them to the main thread,
after the main thread at the receiving end notices that the push
failed and decides not to read these notices and return a failure.
* jk/push-client-deadlock-fix:
t5504: drop sigpipe=ok from push tests
fetch-pack: isolate sigpipe in demuxer thread
send-pack: isolate sigpipe in demuxer thread
run-command: teach async threads to ignore SIGPIPE
send-pack: close demux pipe before finishing async process
Junio C Hamano [Fri, 29 Apr 2016 19:59:06 +0000 (12:59 -0700)]
Merge branch 'nd/test-helpers'
Sources to many test helper binaries (and the generated helpers)
have been moved to t/helper/ subdirectory to reduce clutter at the
top level of the tree.
* nd/test-helpers:
test helpers: move test-* to t/helper/ subdirectory
Makefile: clean *.o files we create
Junio C Hamano [Fri, 29 Apr 2016 19:59:06 +0000 (12:59 -0700)]
Merge branch 'da/user-useconfigonly'
The "user.useConfigOnly" configuration variable makes it an error
if users do not explicitly set user.name and user.email. However,
its check was not done early enough and allowed another error to
trigger, reporting that the default value we guessed from the
system setting was unusable. This was a suboptimal end-user
experience as we want the users to set user.name/user.email without
relying on the auto-detection at all.
* da/user-useconfigonly:
ident: give "please tell me" message upon useConfigOnly error
ident: check for useConfigOnly before auto-detection of name/email
Junio C Hamano [Mon, 25 Apr 2016 22:18:41 +0000 (15:18 -0700)]
Sync with maint
* maint:
l10n: fr: don't translate "merge" as a parameter
l10n: fr: change "id de clé" to match "id-clé"
l10n: fr: fix wrongly translated option name
l10n: fr: fix transcation of "dir"
Junio C Hamano [Mon, 25 Apr 2016 22:17:16 +0000 (15:17 -0700)]
Merge branch 'sb/submodule-path-misc-bugs'
"git submodule" reports the paths of submodules the command
recurses into, but this was incorrect when the command was not run
from the root level of the superproject.
* sb/submodule-path-misc-bugs:
t7407: make expectation as clear as possible
submodule update: test recursive path reporting from subdirectory
submodule update: align reporting path for custom command execution
submodule status: correct path handling in recursive submodules
submodule update --init: correct path handling in recursive submodules
submodule foreach: correct path display in recursive submodules
Junio C Hamano [Mon, 25 Apr 2016 22:17:15 +0000 (15:17 -0700)]
Merge branch 'en/merge-trivial-fix'
When "git merge" notices that the merge can be resolved purely at
the tree level (without having to merge blobs) and the resulting
tree happens to already exist in the object store, it forgot to
update the index, which lead to an inconsistent state for later
operations.
* en/merge-trivial-fix:
builtin/merge.c: fix a bug with trivial merges
t7605: add a testcase demonstrating a bug with trivial merges
Junio C Hamano [Mon, 25 Apr 2016 22:17:15 +0000 (15:17 -0700)]
Merge branch 'dt/pre-refs-backend'
Code restructuring around the "refs" area to prepare for pluggable
refs backends.
* dt/pre-refs-backend: (24 commits)
refs: on symref reflog expire, lock symref not referrent
refs: move resolve_ref_unsafe into common code
show_head_ref(): check the result of resolve_ref_namespace()
check_aliased_update(): check that dst_name is non-NULL
checkout_paths(): remove unneeded flag variable
cmd_merge(): remove unneeded flag variable
fsck_head_link(): remove unneeded flag variable
read_raw_ref(): change flags parameter to unsigned int
files-backend: inline resolve_ref_1() into resolve_ref_unsafe()
read_raw_ref(): manage own scratch space
files-backend: break out ref reading
resolve_ref_1(): eliminate local variable "bad_name"
resolve_ref_1(): reorder code
resolve_ref_1(): eliminate local variable
resolve_ref_unsafe(): ensure flags is always set
resolve_ref_unsafe(): use for loop to count up to MAXDEPTH
resolve_missing_loose_ref(): simplify semantics
t1430: improve test coverage of deletion of badly-named refs
t1430: test for-each-ref in the presence of badly-named refs
t1430: don't rely on symbolic-ref for creating broken symrefs
...
Junio C Hamano [Mon, 25 Apr 2016 22:17:14 +0000 (15:17 -0700)]
Merge branch 'jc/rerere-multi'
"git rerere" can encounter two or more files with the same conflict
signature that have to be resolved in different ways, but there was
no way to record these separate resolutions.
* jc/rerere-multi:
rerere: adjust 'forget' to multi-variant world order
rerere: split code to call ll_merge() further
rerere: move code related to "forget" together
rerere: gc and clear
rerere: do use multiple variants
t4200: rerere a merge with two identical conflicts
rerere: allow multiple variants to exist
rerere: delay the recording of preimage
rerere: handle leftover rr-cache/$ID directory and postimage files
rerere: scan $GIT_DIR/rr-cache/$ID when instantiating a rerere_id
rerere: split conflict ID further
Junio C Hamano [Mon, 25 Apr 2016 20:36:26 +0000 (13:36 -0700)]
Merge tag 'l10n-2.8.0-rnd3-fr' of git://github.com/git-l10n/git-po into maint
l10n-2.8.0-rnd3-fr
* tag 'l10n-2.8.0-rnd3-fr' of git://github.com/git-l10n/git-po:
l10n: fr: don't translate "merge" as a parameter
l10n: fr: change "id de clé" to match "id-clé"
l10n: fr: fix wrongly translated option name
l10n: fr: fix transcation of "dir"
Merge branch 'fr_v2.8.0_r3' of git://github.com/jnavila/git into maint
* 'fr_v2.8.0_r3' of git://github.com/jnavila/git:
l10n: fr: don't translate "merge" as a parameter
l10n: fr: change "id de clé" to match "id-clé"
l10n: fr: fix wrongly translated option name
l10n: fr: fix transcation of "dir"
Junio C Hamano [Fri, 22 Apr 2016 22:45:10 +0000 (15:45 -0700)]
Merge branch 'ad/cygwin-wants-rename'
On Cygwin, object creation uses the "create a temporary and then
rename it to the final name" pattern, not "create a temporary,
hardlink it to the final name and then unlink the temporary"
pattern.
This is necessary to use Git on Windows shared directories, and is
already enabled for the MinGW and plain Windows builds. It also
has been used in Cygwin packaged versions of Git for quite a while.
See http://thread.gmane.org/gmane.comp.version-control.git/291853
Junio C Hamano [Fri, 22 Apr 2016 22:45:09 +0000 (15:45 -0700)]
Merge branch 'jk/do-not-printf-NULL'
"git config" had a codepath that tried to pass a NULL to
printf("%s"), which nobody seems to have noticed.
* jk/do-not-printf-NULL:
git_config_set_multivar_in_file: handle "unset" errors
git_config_set_multivar_in_file: all non-zero returns are errors
config: lower-case first word of error strings
Junio C Hamano [Fri, 22 Apr 2016 22:45:08 +0000 (15:45 -0700)]
Merge branch 'ky/imap-send-openssl-1.1.0'
Upcoming OpenSSL 1.1.0 will break compilation b updating a few APIs
we use in imap-send, which has been adjusted for the change.
* ky/imap-send-openssl-1.1.0:
configure: remove checking for HMAC_CTX_cleanup
imap-send: avoid deprecated TLSv1_method()
imap-send: check NULL return of SSL_CTX_new()
imap-send: use HMAC() function provided by OpenSSL
A partial rewrite of "git submodule" in the 2.7 timeframe changed
the way the gitdir: pointer in the submodules point at the real
repository location to use absolute paths by accident. This has
been corrected.
* sb/submodule-helper-clone-regression-fix:
submodule--helper, module_clone: catch fprintf failure
submodule--helper: do not borrow absolute_path() result for too long
submodule--helper, module_clone: always operate on absolute paths
submodule--helper clone: create the submodule path just once
submodule--helper: fix potential NULL-dereference
recursive submodules: test for relative paths
Junio C Hamano [Fri, 18 Mar 2016 20:21:09 +0000 (13:21 -0700)]
pull: pass --allow-unrelated-histories to "git merge"
The previous commit said:
We could add the same option to "git pull" and have it passed
through to underlying "git merge". I do not have a fundamental
opposition against such a feature, but this commit does not do
so and instead leaves it as low-hanging fruit for others,
because such a "two project merge" would be done after fetching
the other project into some location in the working tree of an
existing project and making sure how well they fit together, it
is sufficient to allow a local merge without such an option
pass-through from "git pull" to "git merge".
Prepare a patch to make it a reality, just in case it is needed.
Junio C Hamano [Thu, 21 Apr 2016 18:52:33 +0000 (11:52 -0700)]
t3033: avoid 'ambiguous refs' warning
Because "test_commit five" creates a commit and point it with a tag
'five', doing so on a branch whose name is 'five' will later result
in an 'ambiguous refs' warning. Even though it is harmless because
all the later references are for the tag, there is no reason for the
branch to be called 'five'. Give it a name that describes its
purpose more clearly, i.e. "newroot".
Jeff King [Tue, 19 Apr 2016 22:51:25 +0000 (18:51 -0400)]
t5504: drop sigpipe=ok from push tests
These were added by 8bf4bec (add "ok=sigpipe" to
test_must_fail and use it to fix flaky tests, 2015-11-27)
because we would racily die via SIGPIPE when the pack was
rejected by the other side.
But since we have recently de-flaked send-pack, we should be
able to tighten up these tests (including re-adding the
expected output checks).
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Tue, 19 Apr 2016 22:50:29 +0000 (18:50 -0400)]
fetch-pack: isolate sigpipe in demuxer thread
In commit 9ff18fa (fetch-pack: ignore SIGPIPE in sideband
demuxer, 2016-02-24), we started using sigchain_push() to
ignore SIGPIPE in the async demuxer thread. However, this is
rather clumsy, as it ignores SIGPIPE for the entire process,
including the main thread. At the time we didn't have any
per-thread signal support, but we now we do. Let's use it.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Tue, 19 Apr 2016 22:50:17 +0000 (18:50 -0400)]
send-pack: isolate sigpipe in demuxer thread
If we get an error from pack-objects, we may exit
send_pack() early, before reading the server's status
response. In such a case, we may racily see SIGPIPE from our
async demuxer (which is trying to write that status back to
us), and we'd prefer to continue pushing the error up the
call stack, rather than taking down the whole process with
signal death.
This is safe to do because our demuxer just calls
recv_sideband, whose data writes are all done with
write_or_die(), which will notice SIGPIPE.
We do also write sideband 2 to stderr, and we would no
longer die on SIGPIPE there (if it were piped in the first
place, and if the piped program went away). But that's
probably a good thing, as it likewise should not abort the
push process at all (neither immediately by signal, nor
eventually by reporting failure back to the main thread).
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Tue, 19 Apr 2016 22:49:41 +0000 (18:49 -0400)]
run-command: teach async threads to ignore SIGPIPE
Async processes can be implemented as separate forked
processes, or as threads (depending on the NO_PTHREADS
setting). In the latter case, if an async thread gets
SIGPIPE, it takes down the whole process. This is obviously
bad if the main process was not otherwise going to die, but
even if we were going to die, it means the main process does
not have a chance to report a useful error message.
There's also the small matter that forked async processes
will not take the main process down on a signal, meaning git
will behave differently depending on the NO_PTHREADS
setting.
This patch fixes it by adding a new flag to "struct async"
to block SIGPIPE just in the async thread. In theory, this
should always be on (which makes async threads behave more
like async processes), but we would first want to make sure
that each async process we spawn is careful about checking
return codes from write() and would not spew endlessly into
a dead pipe. So let's start with it as optional, and we can
enable it for specific sites in future patches.
The natural name for this option would be "ignore_sigpipe",
since that's what it does for the threaded case. But since
that name might imply that we are ignoring it in all cases
(including the separate-process one), let's call it
"isolate_sigpipe". What we are really asking for is
isolation. I.e., not to have our main process taken down by
signals spawned by the async process. How that is
implemented is up to the run-command code.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Tue, 19 Apr 2016 22:45:17 +0000 (18:45 -0400)]
send-pack: close demux pipe before finishing async process
This fixes a deadlock on the client side when pushing a
large number of refs from a corrupted repo. There's a
reproduction script below, but let's start with a
human-readable explanation.
The client side of a push goes something like this:
1. Start an async process to demux sideband coming from
the server.
2. Run pack-objects to send the actual pack, and wait for
its status via finish_command().
3. If pack-objects failed, abort immediately.
4. If pack-objects succeeded, read the per-ref status from
the server, which is actually coming over a pipe from
the demux process started in step 1.
We run finish_async() to wait for and clean up the demux
process in two places. In step 3, if we see an error, we
want it to end early. And after step 4, it should be done
writing any data and we are just cleaning it up.
Let's focus on the error case first. We hand the output
descriptor to the server over to pack-objects. So by the
time it has returned an error to us, it has closed the
descriptor and the server has gotten EOF. The server will
mark all refs as failed with "unpacker error" and send us
back the status for each (followed by EOF).
This status goes to the demuxer thread, which relays it over
a pipe to the main thread. But the main thread never even
tries reading the status. It's trying to bail because of the
pack-objects error, and is waiting for the demuxer thread to
finish. If there are a small number of refs, that's OK; the
demuxer thread writes into the pipe buffer, sees EOF from
the server, and quits. But if there are a large number of
refs, it may block on write() back to the main thread,
leading to a deadlock (the main thread is waiting for the
demuxer to finish, the demuxer is waiting for the main
thread to read).
We can break this deadlock by closing the pipe between the
demuxer and the main thread before calling finish_async().
Then the demuxer gets a write() error and exits.
The non-error case usually just works, because we will have
read all of the data from the other side. We do close
demux.out already, but we only do so _after_ calling
finish_async(). This is OK because there shouldn't be any
more data coming from the server. But technically we've only
read to a flush packet, and a broken or malicious server
could be sending more cruft. In such a case, we would hit
the same deadlock. Closing the pipe first doesn't affect the
normal case, and means that for a cruft-sending server,
we'll notice a write() error rather than deadlocking.
Note that when write() sees this error, we'll actually
deliver SIGPIPE to the thread, which will take down the
whole process (unless we're compiled with NO_PTHREADS). This
isn't ideal, but it's an improvement over the status quo,
which is deadlocking. And SIGPIPE handling in async threads
is a bigger problem that we can deal with separately.
A simple reproduction for the error case is below. It's
technically racy (we could exit the main process and take
down the async thread with us before it even reads the
status), though in practice it seems to fail pretty
consistently.
git init repo &&
cd repo &&
# make some commits; we need two so we can simulate corruption
# in the history later.
git commit --allow-empty -m one &&
one=$(git rev-parse HEAD) &&
git commit --allow-empty -m two &&
two=$(git rev-parse HEAD) &&
# now make a ton of refs; our goal here is to overflow the pipe buffer
# when reporting the ref status, which will cause the demuxer to block
# on write()
for i in $(seq 20000); do
echo "create refs/heads/this-is-a-really-long-branch-name-$i $two"
done |
git update-ref --stdin &&
# now make a corruption in the history such that pack-objects will fail
rm -vf .git/objects/$(echo $one | sed 's}..}&/}') &&
# and then push the result
git init --bare dst.git &&
git push --mirror dst.git
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Stefan Beller [Tue, 19 Apr 2016 18:32:04 +0000 (11:32 -0700)]
mv: allow moving nested submodules
When directories are moved using `git mv` all files in the directory
have been just moved, but no further action was taken on them. This
was done by assigning the mode = WORKING_DIRECTORY to the files
inside a moved directory.
submodules however need to update their link to the git directory as
well as updates to the .gitmodules file. By removing the condition of
`mode != INDEX` (the remaining modes are BOTH and WORKING_DIRECTORY) for
the required submodule actions, we perform these for submodules in a
moved directory.
Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Mon, 18 Apr 2016 17:49:14 +0000 (10:49 -0700)]
Merge branch 'jk/branch-shortening-funny-symrefs'
A change back in version 2.7 to "git branch" broke display of a
symbolic ref in a non-standard place in the refs/ hierarchy (we
expect symbolic refs to appear in refs/remotes/*/HEAD to point at
the primary branch the remote has, and as .git/HEAD to point at the
branch we locally checked out).
* jk/branch-shortening-funny-symrefs:
branch: fix shortening of non-remote symrefs
Junio C Hamano [Mon, 18 Apr 2016 17:48:11 +0000 (10:48 -0700)]
Merge branch 'ky/branch-m-worktree'
When "git worktree" feature is in use, "git branch -m" renamed a
branch that is checked out in another worktree without adjusting
the HEAD symbolic ref for the worktree.
* ky/branch-m-worktree:
set_worktree_head_symref(): fix error message
branch -m: update all per-worktree HEADs
refs: add a new function set_worktree_head_symref
Junio C Hamano [Fri, 15 Apr 2016 17:06:52 +0000 (10:06 -0700)]
Makefile: clean *.o files we create
The part that removes object files in the 'clean' target predates
various Makefile macros that list object files we create, and
instead removes the objects with shell glob, perpetually requiring
updates whenever a new location that builds object files is added.
Simplify the target by removing $(OBJECTS), which is supposed to
have all the objects we create during the build.
Junio C Hamano [Fri, 15 Apr 2016 01:57:49 +0000 (18:57 -0700)]
Merge branch 'jv/merge-nothing-into-void' into maint
"git merge FETCH_HEAD" dereferenced NULL pointer when merging
nothing into an unborn history (which is arguably unusual usage,
which perhaps was the reason why nobody noticed it).
* jv/merge-nothing-into-void:
merge: fix NULL pointer dereference when merging nothing into void
Junio C Hamano [Fri, 15 Apr 2016 01:57:48 +0000 (18:57 -0700)]
Merge branch 'ss/commit-squash-msg' into maint
When "git merge --squash" stopped due to conflict, the concluding
"git commit" failed to read in the SQUASH_MSG that shows the log
messages from all the squashed commits.
* ss/commit-squash-msg:
commit: do not lose SQUASH_MSG contents
Junio C Hamano [Fri, 15 Apr 2016 01:57:46 +0000 (18:57 -0700)]
Merge branch 'jk/startup-info' into maint
The startup_info data, which records if we are working inside a
repository (among other things), are now uniformly available to Git
subcommand implementations, and Git avoids attempting to touch
references when we are not in a repository.
* jk/startup-info:
use setup_git_directory() in test-* programs
grep: turn off gitlink detection for --no-index
mailmap: do not resolve blobs in a non-repository
remote: don't resolve HEAD in non-repository
setup: set startup_info->have_repository more reliably
setup: make startup_info available everywhere
Junio C Hamano [Fri, 15 Apr 2016 01:57:44 +0000 (18:57 -0700)]
Merge branch 'jk/rev-parse-local-env-vars' into maint
The "--local-env-vars" and "--resolve-git-dir" options of "git
rev-parse" failed to work outside a repository when the command's
option parsing was rewritten in 1.8.5 era.
* jk/rev-parse-local-env-vars:
rev-parse: let some options run outside repository
t1515: add tests for rev-parse out-of-repo helpers
Junio C Hamano [Fri, 15 Apr 2016 01:57:43 +0000 (18:57 -0700)]
Merge branch 'jk/config-get-urlmatch' into maint
"git config --get-urlmatch", unlike other variants of the "git
config --get" family, did not signal error with its exit status
when there was no matching configuration.
* jk/config-get-urlmatch:
Documentation/git-config: fix --get-all description
Documentation/git-config: use bulleted list for exit codes
config: fail if --get-urlmatch finds no value
Remove extra + 1 from resp_len, the length of the byte sequence to be
Base64 encoded and passed to the server as the response. Or the response
incorrectly contains an extra \0.
Signed-off-by: Kazuki Yamaguchi <k@rhe.jp> Signed-off-by: Junio C Hamano <gitster@pobox.com>
imap-send: check for NOLOGIN capability only when using LOGIN command
Don't check for NOLOGIN (LOGINDISABLED) capability when imap.authMethod
is specified.
LOGINDISABLED capability doesn't forbid using AUTHENTICATE, so it should
be allowed, or we can't connect to IMAP servers which only accepts
AUTHENTICATE command.
Signed-off-by: Kazuki Yamaguchi <k@rhe.jp> Signed-off-by: Junio C Hamano <gitster@pobox.com>
When running "git blame $path" with unnormalized data in the index
for the path, the data in the working tree was blamed, even though
"git add" would not have changed what is already in the index, due
to "safe crlf" that disables the line-end conversion. It has been
corrected.
* tb/blame-force-read-cache-to-workaround-safe-crlf:
correct blame for files commited with CRLF
Junio C Hamano [Wed, 13 Apr 2016 21:12:36 +0000 (14:12 -0700)]
Merge branch 'lt/pretty-expand-tabs'
When "git log" shows the log message indented by 4-spaces, the
remainder of a line after a HT does not align in the way the author
originally intended. The command now expands tabs by default in
such a case, and allows the users to override it with a new option,
'--no-expand-tabs'.
* lt/pretty-expand-tabs:
pretty: test --expand-tabs
pretty: allow tweaking tabwidth in --expand-tabs
pretty: enable --expand-tabs by default for selected pretty formats
pretty: expand tabs in indented logs to make things line up properly
Junio C Hamano [Wed, 13 Apr 2016 21:12:36 +0000 (14:12 -0700)]
Merge branch 'mj/pull-rebase-autostash'
"git pull --rebase" learned "--[no-]autostash" option, so that
the rebase.autostash configuration variable set to true can be
overridden from the command line.
* mj/pull-rebase-autostash:
t5520: test --[no-]autostash with pull.rebase=true
t5520: reduce commom lines of code
t5520: factor out common "failing autostash" code
t5520: factor out common "successful autostash" code
t5520: use better test to check stderr output
t5520: ensure consistent test conditions
t5520: use consistent capitalization in test titles
pull --rebase: add --[no-]autostash flag
git-pull.c: introduce git_pull_config()
Junio C Hamano [Wed, 13 Apr 2016 21:12:35 +0000 (14:12 -0700)]
Merge branch 'es/format-patch-doc-hide-no-patch'
"git format-patch --help" showed `-s` and `--no-patch` as if these
are valid options to the command. We already hide `--patch` option
from the documentation, because format-patch is about showing the
diff, and the documentation now hides these options as well.
* es/format-patch-doc-hide-no-patch:
git-format-patch.txt: don't show -s as shorthand for multiple options
Junio C Hamano [Wed, 13 Apr 2016 21:12:34 +0000 (14:12 -0700)]
Merge branch 'sb/misc-cleanups'
Assorted minor clean-ups.
* sb/misc-cleanups:
credential-cache, send_request: close fd when done
bundle: don't leak an fd in case of early return
abbrev_sha1_in_line: don't leak memory
notes: don't leak memory in git_config_get_notes_strategy
Junio C Hamano [Wed, 13 Apr 2016 21:12:32 +0000 (14:12 -0700)]
Merge branch 'sg/diff-multiple-identical-renames'
"git diff -M" used to work better when two originally identical
files A and B got renamed to X/A and X/B by pairing A to X/A and B
to X/B, but this was broken in the 2.0 timeframe.
* sg/diff-multiple-identical-renames:
diffcore: fix iteration order of identical files during rename detection
Junio C Hamano [Wed, 13 Apr 2016 21:12:28 +0000 (14:12 -0700)]
Merge branch 'jk/check-repository-format'
The repository set-up sequence has been streamlined (the biggest
change is that there is no longer git_config_early()), so that we
do not attempt to look into refs/* when we know we do not have a
Git repository.
* jk/check-repository-format:
verify_repository_format: mark messages for translation
setup: drop repository_format_version global
setup: unify repository version callbacks
init: use setup.c's repo version verification
setup: refactor repo format reading and verification
config: drop git_config_early
check_repository_format_gently: stop using git_config_early
lazily load core.sharedrepository
wrap shared_repository global in get/set accessors
setup: document check_repository_format()
t6044: new merge testcases for when index doesn't match HEAD
With one exception, we require the index to exactly match the
current HEAD commit at the time git merge is invoked. This
expectation was even documented in git-merge.txt until commit ebef7e5 (Documentation: simplify How Merge Works, 2010-01-23).
Most merge strategies enforced this requirement, but it turns out
not all did. The current exceptions were the following two:
* ff updates
* octopus merges
ff updates actually will error out if the staged change is to a path
modified between HEAD and the commit being merged. If the path(s)
that are staged are files unrelated to the changes between these two
commits, though, then an ff update will just keep these staged
changes around after the merge. This is the one exception we
expected to the abort-merge-if- index-doesn't-match-HEAD rule.
For octopus merges, the rule should be enforced. Unfortunately, the
current behavior of the code is to ignore the difference and use the
staged changes in place of whatever is in HEAD as it proceeds to
perform the merge. So if the staged changes can be cleanly merged
with all the other heads, then the staged changes will just be
incorported into the resulting commit. If the staged changes cannot
be cleanly merged with all the other heads, the merge is not aborted
-- merge conflicts are simply reported as if HEAD had originally
contained whatever the index did.
Add testcases that check our expectations. A subsequent commit will
correct the erroneous octopus merge behavior.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
If read_tree_trivial() succeeds and produces a tree that is already
in the object store, then the index is not written to disk, leaving
it out-of-sync with both HEAD and the working tree.
In order to write the index back out to disk after a merge,
write_index_locked() needs to be called. For most merge strategies, this
is done from try_merge_strategy(). For fast forward updates, this is
done from checkout_fast_forward(). When trivial merges work, the call to
write_index_locked() is buried a little deeper:
However, it is only called when !cache_tree_fully_valid(), which is how
this bug is triggered. But that also shows why this bug doesn't affect
any other merge strategies or cases.
Add a direct call to write_index_locked() from merge_trivial() to fix
this issue. Since the indirect call to write_locked_index() was
conditional on cache_tree_fully_valid(), it won't be written twice.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t7605: add a testcase demonstrating a bug with trivial merges
Repeating a trivial merge more than once will leave the index out of
sync, despite being clean before the merge and operating on the
exact same heads as the first run. The recorded merge has the
correct tree and the working tree is brought up to date, it is just
the index that is left as it was before the merge. Every attempt to
repeat the merge beyond the first will leave the index in the same
weird out-of-sync state.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Tue, 12 Apr 2016 16:59:59 +0000 (09:59 -0700)]
t3404: use write_script
The test uses hardcoded #!/bin/sh to create a pre-commit hook
script. Because the generated script uses $(command substitution),
which is not supported by /bin/sh on some platforms (e.g. Solaris),
the resulting pre-commit always fails.
Which is not noticeable as the test that uses the hook is about
checking the behaviour of the command when the hook fails ;-), but
nevertheless it is not testing what we wanted to test.
Use write_script so that the resulting script is run under the same
shell our scripted Porcelain commands are run, which must support
the necessary $(construct).
Helped-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Sun, 10 Apr 2016 19:01:30 +0000 (12:01 -0700)]
t1020: do not overuse printf and use write_script
The test prepares a sample file "dir/two" with a single incomplete
line in it with "printf", and also prepares a small helper script
"diff" to create a file with a single incomplete line in it, again
with "printf". The output from the latter is compared with an
expected output, again prepared with "printf" hence lacking the
final LF. There is no reason for this test to be using files with
an incomplete line at the end, and these look more like a mistake
of not using
printf "%s\n" "string to be written"
and using
printf "string to be written"
Depending on what would be in $GIT_PREFIX, using the latter form
could be a bug waiting to happen. Correct them.
Also, the test uses hardcoded #!/bin/sh to create a small helper
script. For a small task like what the generated script does, it
does not matter too much in that what appears as /bin/sh would not
be _so_ broken, but while we are at it, use write_script instead,
which happens to make the result easier to read by reducing need
of one level of quoting.
Jeff King [Sat, 9 Apr 2016 21:04:30 +0000 (17:04 -0400)]
t5532: use write_script
The recent cleanup in b7cbbff switched t5532's use of
backticks to $(). This matches our normal shell style, which
is good. But it also breaks the test on Solaris, where
/bin/sh does not understand $().
Our normal shell style assumes a modern-ish shell which
knows about $(). However, some tests create small helper
scripts and just write "#!/bin/sh" into them. These scripts
either need to go back to using backticks, or they need to
respect $SHELL_PATH. The easiest way to do the latter is to
use write_script.
While we're at it, let's also stick the script creation
inside a test_expect block (our usual style), and split the
perl snippet into its own script (to prevent quoting
madness).
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
David Turner [Thu, 7 Apr 2016 19:03:11 +0000 (15:03 -0400)]
refs: on symref reflog expire, lock symref not referrent
When locking a symbolic ref to expire a reflog, lock the symbolic
ref (using REF_NODEREF) instead of its referent.
Add a test for this.
Signed-off-by: David Turner <dturner@twopensource.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
David Turner [Thu, 7 Apr 2016 19:03:10 +0000 (15:03 -0400)]
refs: move resolve_ref_unsafe into common code
Now that resolve_ref_unsafe's only interaction with the backend is
through read_raw_ref, we can move it into the common code. Later,
we'll replace read_raw_ref with a backend function.
Signed-off-by: David Turner <dturner@twopensource.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
show_head_ref(): check the result of resolve_ref_namespace()
Only use the result of resolve_ref_namespace() if it is non-NULL.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
check_aliased_update(): check that dst_name is non-NULL
If there is an error in resolve_ref_unsafe(), it returns NULL. We check
for this case, but not until after calling strip_namespace(). Instead,
call strip_namespace() *after* the NULL check.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>