Several test scripts run daemons like 'git-daemon' or Apache, and
communicate with them through TCP sockets. To have unique ports where
these daemons are accessible, the ports are usually the number of the
corresponding test scripts, unless the user overrides them via
environment variables, and thus all those tests and test libs contain
more or less the same bit of one-liner boilerplate code to find out
the port. The last patch in this series will make this a bit more
complicated.
Factor out finding the port for a daemon into the common helper
function 'test_set_port' to avoid repeating ourselves.
Take special care of test scripts with "low" numbers:
- Test numbers below 1024 would result in a port that's only usable
as root, so set their port to '10000 + test-nr' to make sure it
doesn't interfere with other tests in the test suite. This makes
the hardcoded port number in 't0410-partial-clone.sh' unnecessary,
remove it.
- The shell's arithmetic evaluation interprets numbers with leading
zeros as octal values, which means that test number below 1000 and
containing the digits 8 or 9 will trigger an error. Remove all
leading zeros from the test numbers to prevent this.
Note that the 'git p4' tests are unlike the other tests involving
daemons in that:
- 'lib-git-p4.sh' doesn't use the test's number for unique port as
is, but does a bit of additional arithmetic on top [1].
- The port is not overridable via an environment variable.
With this patch even 'git p4' tests will use the test's number as
default port, and it will be overridable via the P4DPORT environment
variable.
[1] Commit fc00233071 (git-p4 tests: refactor and cleanup, 2011-08-22)
introduced that "unusual" unique port computation without
explaining why it was necessary (as opposed to simply using the
test number as is). It seems to be just unnecessary complication,
and in any case that commit came way before the "test nr as unique
port" got "standardized" for other daemons in commits c44132fcf3
(tests: auto-set git-daemon port, 2014-02-10), 3bb486e439 (tests:
auto-set LIB_HTTPD_PORT from test name, 2014-02-10), and
bf9d7df950 (t/lib-git-svn.sh: improve svnserve tests with parallel
make test, 2017-12-01).
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A later patch in this series will need to know the path to the trash
directory early in 'test-lib.sh', but $TRASH_DIRECTORY is set much
later.
Set $TRASH_DIRECTORY earlier, where the other test-specific path
variables are set.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are two places where we strip off any leading path components
and the '.sh' suffix from the test script's pathname, and there are
four places where we construct the name of the 't/test-results'
directory or the name of various test-specific files in there. The
last patch in this series will add even more.
Factor these out into helper variables to avoid repeating ourselves.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
'test-lib.sh' looks for the presence of certain options like '--tee'
and '--verbose-log', so it can execute the test script again to save
its standard output and error. It looks for '--valgrind' as well, to
set up some Valgrind-specific stuff. These all happen before the
actual option parsing loop, and the conditions looking for these
options look a bit odd, too. They are not completely correct, either,
because in a bogus invocation like './t1234-foo.sh -r --tee' they
recognize '--tee', although it should be handled as the required
argument of the '-r' option. This patch series will add two more
options to look out for early, and, in addition, will have to extract
these options' stuck arguments (i.e. '--opt=arg') as well.
So let's move the option parsing loop and the couple of related
conditions following it earlier in 'test-lib.sh', before the place
where the test script is executed again for '--tee' and its friends.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
'test-lib.sh' looks for the presence of certain options like '--tee'
and '--verbose-log', so it can execute the test script again to save
its standard output and error, and to do so it needs the original
command line options the test was invoked with.
The next patch is about to move the option parsing loop earlier in
'test-lib.sh', but it is implemented using 'shift' in a while loop,
effecively destroying "$@" by the end of the option parsing. Not
good.
As a preparatory step, turn that option parsing loop into a 'for opt
in "$@"' loop to preserve "$@" intact while iterating over the
options, and taking extra care to handle the '-r' option's required
argument (or the lack thereof).
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
One of our test scripts, 't1510-repo-setup.sh' [1], still can't be
reliably run with '-x' tracing enabled, unless it's executed with a
Bash version supporting BASH_XTRACEFD (since v4.1). We have a lengthy
condition to check the version of the shell running the test script,
and disable tracing if it's not executed with a suitable Bash version
[2].
Move this check out from the option parsing loop, so other options can
imply '-x' by setting 'trace=t', without missing this Bash version
check.
[1] 5827506928 (t1510-repo-setup: mark as untraceable with '-x',
2018-02-24)
[2] 5fc98e79fc (t: add means to disable '-x' tracing for individual
test scripts, 2018-02-24)
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
801fa63a90 ("config.mak.dev: add -Wformat-security", 2018-09-08)
added the "-Wformat-security" to the flags set in config.mak.dev.
In the gcc man page this is documented as:
If -Wformat is specified, also warn about uses of format
functions that represent possible security problems. [...]
The commit did however not add the "-Wformat" flag, but instead
relied on the fact that "-Wall" is set in the Makefile by default
and that "-Wformat" is part of "-Wall".
Unfortunately, those who use config.mak.autogen generated with the
autoconf to configure toolchain do *not* get "-Wall" in their CFLAGS
and the added -Wformat-security had no effect. Worse yet, newer
versions of gcc (gcc 8.2.1 in this particular case) warn about the
lack of "-Wformat" and thus compilation fails only with this option
set.
We could fix it by adding "-Wformat", but in general we do want all
checks included in "-Wall", so let's add it to config.mak.dev to
cover more cases.
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Helped-by: Jeff King <peff@peff.net>
Helped-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
map_sha1_file_1() checks if the file it is about to mmap() is empty and
errors out in that case and explains the situation in an error message.
It leaks the private handle to that empty file, though.
Have the function clean up after itself and close the file descriptor
before exiting early.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This reverts commit 314a73d658 (t/lib-git-daemon: record daemon log,
2018-01-25), which let tests use the output of git-daemon.
The previous commit removed the last user of deamon.log in the tests,
there's no good way to make checking for output in the log
race-proof. Revert this commit as well, to make sure others are not
tempted to use daemon.log in tests in the future, which would lead to
racy tests.
The original commit had one change that still makes sense, namely
switching read/echo for "read -r" and "printf", which relays the data
more faithfully. Don't revert that piece here, as it is still a
useful change.
Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The http-backend CGI process did not correctly clean up the child
processes it spawns to run upload-pack etc. when it dies itself,
which has been corrected.
* mk/http-backend-kill-children-before-exit:
http-backend: enable cleaning up forked upload/receive-pack on exit
A properly configured username/email is required under
user.useConfigOnly in order to create commits; now "git stash"
(even though it creates commit objects to represent stash entries)
command is exempt from the requirement.
* sd/stash-wo-user-name:
stash: tolerate missing user identity
Refspecs configured with "git -c var=val clone" did not propagate
to the resulting repository, which has been corrected.
* sg/clone-initial-fetch-configuration:
Documentation/clone: document ignored configuration variables
clone: respect additional configured fetch refspecs during initial fetch
clone: use a more appropriate variable name for the default refspec
"git checkout frotz" (without any double-dash) avoids ambiguity by
making sure 'frotz' cannot be interpreted as a revision and as a
path at the same time. This safety has been updated to check also
a unique remote-tracking branch 'frotz' in a remote, when dwimming
to create a local branch 'frotz' out of a remote-tracking branch
'frotz' from a remote.
* nd/checkout-dwim-fix:
checkout: disambiguate dwim tracking branches and local files
"git push $there $src:$dst" rejects when $dst is not a fully
qualified refname and not clear what the end user meant. The
codepath has been taught to give a clearer error message, and also
guess where the push should go by taking the type of the pushed
object into account (e.g. a tag object would want to go under
refs/tags/).
* ab/push-dwim-dst:
push doc: document the DWYM behavior pushing to unqualified <dst>
push: test that <src> doesn't DWYM if <dst> is unqualified
push: add an advice on unqualified <dst> push
push: move unqualified refname error into a function
push: improve the error shown on unqualified <dst> push
i18n: remote.c: mark error(...) messages for translation
remote.c: add braces in anticipation of a follow-up change
Small fixes and features for fast-export and fast-import, mostly on
the fast-export side.
* en/fast-export-import:
fast-export: add a --show-original-ids option to show original names
fast-import: remove unmaintained duplicate documentation
fast-export: add --reference-excluded-parents option
fast-export: ensure we export requested refs
fast-export: when using paths, avoid corrupt stream with non-existent mark
fast-export: move commit rewriting logic into a function for reuse
fast-export: avoid dying when filtering by paths and old tags exist
fast-export: use value from correct enum
git-fast-export.txt: clarify misleading documentation about rev-list args
git-fast-import.txt: fix documentation for --quiet option
fast-export: convert sha1 to oid
Code clean-up with optimization for the codepath that checks
(non-)existence of loose objects.
* jk/loose-object-cache:
odb_load_loose_cache: fix strbuf leak
fetch-pack: drop custom loose object cache
sha1-file: use loose object cache for quick existence check
object-store: provide helpers for loose_objects_cache
sha1-file: use an object_directory for the main object dir
handle alternates paths the same as the main object dir
sha1_file_name(): overwrite buffer instead of appending
rename "alternate_object_database" to "object_directory"
submodule--helper: prefer strip_suffix() to ends_with()
fsck: do not reuse child_process structs
The "http.version" configuration variable can be used with recent
enough cURL library to force the version of HTTP used to talk when
fetching and pushing.
* fc/http-version:
http: add support selecting http version
More _("i18n") markings.
* nd/i18n:
fsck: mark strings for translation
fsck: reduce word legos to help i18n
parse-options.c: mark more strings for translation
parse-options.c: turn some die() to BUG()
parse-options: replace opterror() with optname()
repack: mark more strings for translation
remote.c: mark messages for translation
remote.c: turn some error() or die() to BUG()
reflog: mark strings for translation
read-cache.c: add missing colon separators
read-cache.c: mark more strings for translation
read-cache.c: turn die("internal error") to BUG()
attr.c: mark more string for translation
archive.c: mark more strings for translation
alias.c: mark split_cmdline_strerror() strings for translation
git.c: mark more strings for translation
Right now if a test script receives SIGTERM or SIGHUP (e.g., because a
test was hanging and the user 'kill'-ed it or simply closed the
terminal window the test was running in), the shell exits immediately.
This can be annoying if the test script did any global setup, like
starting apache or git-daemon, as it will not have an opportunity to
clean up after itself. A subsequent run of the test won't be able to
start its own daemon, and will either fail or skip the tests.
Instead, let's trap SIGTERM and SIGHUP as well to make sure we do a
clean shutdown, and just chain it to a normal exit (which will trigger
any cleanup).
This patch follows suit of da706545f7 (t: translate SIGINT to an exit,
2015-03-13), and even stole its commit message as well.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The system definition header files on HPE NonStop do not define
intptr_t and uintptr_t as do other platforms. These typedefs
are added specifically wrapped in a __TANDEM ifdef.
Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The HPE NonStop (a.k.a. __TANDEM) platform cannot build git without
using the FLOSS package supplied by HPE. The convenient location
for including the relevant headers is in this file.
The NSIG define is also not defined on __TANDEM, so we define it
here as 100 if it is not defined only for __TANDEM builds.
Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A number of configuration options are not automatically detected by
configure mechanisms, including the location of Perl and Python.
There was a problem at a specific set of operating system versions
that caused getopt to have compile errors. Account for this by
providing emulation defines for those versions.
Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since we use xread() and xwrite() here, EINTR, EAGAIN, and
EWOULDBLOCK retries are already handled for us, and we will
never see these errno values ourselves. We can drop these
conditions entirely, making the code easier to follow.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This fix was needed on HPE NonStop NSE and NSX where SSIZE_MAX is less than
BUFFERSIZE resulting in EINVAL. The call to read in transport-helper.c
was the only place outside of wrapper.c where it is used instead of xread.
Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
One of our test scripts, 't1510-repo-setup.sh' [1], still can't be
reliably run with '-x' tracing enabled, unless it's executed with a
Bash version supporting BASH_XTRACEFD (since v4.1). We have a lengthy
condition to check the version of the shell running the test script,
and disable tracing if it's not executed with a suitable Bash version
[2].
This condition uses non-portable shell array accesses to easily get
Bash's major and minor version number. This didn't seem to be
problematic, because the simple commands expanding those array
accesses are only executed when the test script is actually run with
Bash. When run with Dash, the only shell I have at hand that doesn't
support shell arrays, there are no issues, as it apparently skips
right over the non-executed simple commands without noticing the
non-supported constructs.
Alas, it has been reported that NetBSD's /bin/sh does complain about
them:
./test-lib.sh: 327: Syntax error: Bad substitution
where line 327 contains the first ${BASH_VERSINFO[0]} array access.
To my understanding both shells are right and conform to POSIX,
because the standard allows both behaviors by stating the following
under '2.8.1 Consequences of Shell Errors' [3]:
"An expansion error is one that occurs when the shell expansions
define in wordexp are carried out (for example, "${x!y}", because
'!' is not a valid operator); an implementation may treat these as
syntax errors if it is able to detect them during tokenization,
rather than during expansion."
Avoid this issue with NetBSD's /bin/sh (and potentially with other,
less common shells) by hiding the shell array syntax behind 'eval'
that is only executed with Bash.
[1] 5827506928 (t1510-repo-setup: mark as untraceable with '-x',
2018-02-24)
[2] 5fc98e79fc (t: add means to disable '-x' tracing for individual
test scripts, 2018-02-24)
[3] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_08_01
Reported-by: Max Kirillov <max@max630.net>
Helped-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Let's say there are files named 'foo bar.txt', and 'abc def/test.txt' in
repository. When following commands trigger a completion:
git show HEAD:fo<Tab>
git show HEAD:ab<Tab>
The completion results in bash/zsh:
git show HEAD:foo bar.txt
git show HEAD:abc def/
Where the both of them have an unescaped space in paths, so they'll be
misread by git. All entries of git ls-tree either a filename or a
directory, so __gitcomp_file() is proper rather than __gitcomp_nl().
Note the commit f12785a3, which handles quoted paths properly. Like this
case, we should dequote $cur_ for ?*:* case. For example, let's say
there is untracked directory 'abc deg', then trigger a completion:
git show HEAD:abc\ de<Tab>
git show HEAD:'abc de<Tab>
git show HEAD:"abc de<Tab>
should uniquely complete 'abc def', but bash completes 'abc def' and
'abc deg' instead. In zsh, triggering a completion:
git show HEAD:abc\ def/<Tab>
should complete 'test.txt', but nothing comes. The both problems will be
resolved by dequoting paths.
__git_complete_revlist_file() passes arguments to __gitcomp_nl() where
the first one is a list something like:
abc def/Z
foo bar.txt Z
where Z is the mark of the EOL.
- The trailing space of blob in __git ls-tree | sed.
It makes the completion results become:
git show HEAD:foo\ bar.txt\ <CURSOR>
So git will try to find a file named 'foo bar.txt ' instead.
- The trailing slash of tree in __git ls-tree | sed.
It makes the completion results on zsh become:
git show HEAD:abc\ def/ <CURSOR>
So that the last space on command like should be removed on zsh to
complete filenames under 'abc def/'.
Signed-off-by: Chayoung You <yousbe@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The following is the description of -Q flag of zsh compadd [1]:
This flag instructs the completion code not to quote any
metacharacters in the words when inserting them into the command
line.
Let's say there is a file named 'foo bar.txt' in repository, but it's
not yet added to the repository. Then the following command triggers a
completion:
git add fo<Tab>
git add 'fo<Tab>
git add "fo<Tab>
The completion results in bash:
git add foo\ bar.txt
git add 'foo bar.txt'
git add "foo bar.txt"
While them in zsh:
git add foo bar.txt
git add 'foo bar.txt'
git add "foo bar.txt"
The first one, where the pathname is not enclosed in quotes, should
escape the space with a backslash, just like bash completion does.
Otherwise, this leads git to think there are two files; foo, and
bar.txt.
The main cause of this behavior is __gitcomp_file_direct(). The both
implementions of bash and zsh are called with an argument 'foo bar.txt',
but only bash adds a backslash before a space on command line.
[1]: http://zsh.sourceforge.net/Doc/Release/Completion-Widgets.html
Signed-off-by: Chayoung You <yousbe@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
setup_git_directory_gently() expects two types of failures to
discover a git directory (e.g. .git/):
- GIT_DIR_HIT_CEILING: could not find a git directory in any
parent directories of the cwd.
- GIT_DIR_HIT_MOUNT_POINT: could not find a git directory in
any parent directories up to the mount point of the cwd.
Both cases are handled in a similar way, but there are misleading
and unimportant differences. In both cases, setup_git_directory_gently()
should:
- Die if we are not in a git repository. Otherwise:
- Set nongit_ok = 1, indicating that we are not in a git repository
but this is ok.
- Call strbuf_release() on any non-static struct strbufs that we
allocated.
Before this change are two misleading additional behaviors:
- GIT_DIR_HIT_CEILING: setup_nongit() changes to the cwd for no
apparent reason. We never had the chance to change directories
up to this point so chdir(current cwd) is pointless.
- GIT_DIR_HIT_MOUNT_POINT: strbuf_release() frees the buffer
of a static struct strbuf (cwd). This is unnecessary because the
struct is static so its buffer is always reachable. This is also
misleading because nowhere else in the function is this buffer
released.
This change eliminates these two misleading additional behaviors and
deletes setup_nogit() because the code is clearer without it. The
result is that we can see clearly that GIT_DIR_HIT_CEILING and
GIT_DIR_HIT_MOUNT_POINT lead to the same behavior (ignoring the
different help messages).
During review, this change was amended to additionally include:
- Neither GIT_DIR_HIT_CEILING nor GIT_DIR_HIT_MOUNT_POINT may
return early from setup_git_directory_gently() before the
GIT_PREFIX environment variable is reset. Change both cases to
break instead of return. See GIT_PREFIX below for more details.
- GIT_DIR_NONE: setup_git_directory_gently_1() never returns this
value, but if it ever did, setup_git_directory_gently() would
incorrectly record that it had found a repository. Explicitly
BUG on this case because it is underspecified.
- GIT_PREFIX: this environment variable must always match the
value of startup_info->prefix and the prefix returned from
setup_git_directory_gently(). Make how we handle this slightly
more repetitive but also more clear.
- setup_git_env() and repo_set_hash_algo(): Add comments showing
that only GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, and GIT_DIR_BARE
will cause setup_git_directory_gently() to call these setup
functions. This was obvious (but partly incorrect) before this
change when GIT_DIR_HIT_MOUNT_POINT returned early from
setup_git_directory_gently().
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When writing a commit-graph, we write GRAPH_MISSING_PARENT if the
parent's object id does not appear in the list of commits to be
written into the commit-graph. This was done as the initial design
allowed commits to have missing parents, but the final version
requires the commit-graph to be closed under reachability. Thus,
this GRAPH_MISSING_PARENT value should never be written.
However, there are reasons why it could be written! These range
from a bug in the reachable-closure code to a memory error causing
the binary search into the list of object ids to fail. In either
case, we should fail fast and avoid writing the commit-graph file
with bad data.
Remove the GRAPH_MISSING_PARENT constant in favor of the constant
GRAPH_EDGE_LAST_MASK, which has the same value.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The scripted version of rebase used to run this hook on the initial
checkout. The transition to built-in introduced a regression.
Signed-off-by: Orgad Shaneh <orgads@gmail.com>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There is no strong reason to use separate clones to run
these tests; just use a single test repository prepared
with more modern test_commit shell helper function.
While at it, replace three "awk '{print $N}'" on the same
file with shell built-in "read" into three variables.
Revert d42ec126aa which is a workaround for
Cygwin that is no longer needed.
Signed-off-by: Orgad Shaneh <orgads@gmail.com>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In the Git pack protocol definition, an error packet may appear only in
a certain context. However, servers can face a runtime error (e.g. I/O
error) at an arbitrary timing. This patch changes the protocol to allow
an error packet to be sent instead of any packet.
Without this protocol spec change, when a server cannot process a
request, there's no way to tell that to a client. Since the server
cannot produce a valid response, it would be forced to cut a connection
without telling why. With this protocol spec change, the server can be
more gentle in this situation. An old client may see these error packets
as an unexpected packet, but this is not worse than having an unexpected
EOF.
Following this protocol spec change, the error packet handling code is
moved to pkt-line.c. Implementation wise, this implementation uses
pkt-line to communicate with a subprocess. Since this is not a part of
Git protocol, it's possible that a packet that is not supposed to be an
error packet is mistakenly parsed as an error packet. This error packet
handling is enabled only for the Git pack protocol parsing code
considering this.
Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
By using and sharing a packet_reader while handling a Git pack protocol
request, the same reader option is used throughout the code. This makes
it easy to set a reader option to the request parsing code.
Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
strncat() has the same quadratic behavior as strcat() and is
difficult-to-read and bug-prone. While it hasn't yet been a
problem in git iself, strncat() found it's way into 'master'
of cgit and caused segfaults on my system.
Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The documentation for this option jumps right in with "With `add`",
without explaining that `add` is a sub-command of "git worktree".
Together with rather odd grammatical structure of the remainder of the
sentence, the description can be difficult for newcomers to understand.
Clarify by improving the grammar and mentioning "git worktree add"
explicitly.
Reported-by: Олег Самойлов <splarv@ya.ru>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Ever since commit 3f213981e4 ("add tests for rebasing merged history",
2013-06-06), t3425 has had tests which included the rebasing of merged
history and whose order of applied commits was checked. Unfortunately,
the tests expected different behavior depending on which backend was in
use. Implementing these checks was the following four lines (including
the TODO message) which were repeated verbatim three times in t3425:
#TODO: make order consistent across all flavors of rebase
test_run_rebase success 'e n o' ''
test_run_rebase success 'e n o' -m
test_run_rebase success 'n o e' -i
As part of the effort to reduce differences between the rebase backends
so that users get more uniform behavior, let's define the correct
behavior and modify the different backends so they all get the right
answer. It turns out that the difference in behavior here is entirely
due to topological sorting; since some backends require topological
sorting (particularly when --rebase-merges is specified), require it for
all modes. Modify the am and merge backends to implement this.
Performance Considerations:
I was unable to measure any appreciable performance difference with this
change. Trying to control the run-to-run variation was difficult; I
eventually found a headless beefy box that I could ssh into, which
seemed to help. Using git.git, I ran the following testcase:
$ git reset --hard v2.20.0-rc1~2
$ time git rebase --quiet v2.20.0-rc0~16
I first ran once to warm any disk caches, then ran five subsequent runs
and recorded the times of those five. I observed the following results
for the average time:
Before this change:
"real" timing: 1.340s (standard deviation: 0.040s)
"user" timing: 1.050s (standard deviation: 0.041s)
"sys" timing: 0.270s (standard deviation: 0.011s)
After this change:
"real" timing: 1.327s (standard deviation: 0.065s)
"user" timing: 1.031s (standard deviation: 0.061s)
"sys" timing: 0.280s (standard deviation: 0.014s)
Measurements aside, I would expect the timing for walking revisions to
be dwarfed by the work involved in creating and applying patches, so
this isn't too surprising. Further, while somewhat counter-intuitive,
it is possible that turning on topological sorting is actually a
performance improvement: by way of comparison, turning on --topo-order
made fast-export faster (see
https://public-inbox.org/git/20090211135640.GA19600@coredump.intra.peff.net/).
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The git-legacy-rebase.sh script previously had code of the form:
if git_am_opt:
if interactive:
if incompatible_opts:
show_error_about_interactive_and_am_incompatibilities
if rebase-merge:
if incompatible_opts
show_error_about_merge_and_am_incompatibilities
which was a triply nested if. However, the first conditional
(git_am_opt) and third (incompatible_opts) were somewhat redundant: the
latter condition was a strict subset of the former. Simplify this by
moving the innermost conditional to the outside, allowing us to remove
the test on git_am_opt entirely and giving us the following form:
if incompatible_opts:
if interactive:
show_error_about_interactive_and_am_incompatibilities
if rebase-merge:
show_error_about_merge_and_am_incompatibilities
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
While 'quiet' and 'interactive' may sound like antonyms, the interactive
machinery actually has logic that implements several
interactive_rebase=implied cases (--exec, --keep-empty, --rebase-merges)
which won't pop up an editor. The rewrite of interactive rebase in C
added a quiet option, though it only turns stats off. Since we want to
make the interactive machinery also take over for git-rebase--merge, it
should fully implement the --quiet option.
git-rebase--interactive was already somewhat quieter than
git-rebase--merge and git-rebase--am, possibly because cherry-pick has
just traditionally been quieter. As such, we only drop a few
informational messages -- "Rebasing (n/m)" and "Successfully rebased..."
Also, for simplicity, remove the differences in how quiet and verbose
options were recorded. Having one be signalled by the presence of a
"verbose" file in the state_dir, while the other was signalled by the
contents of a "quiet" file was just weirdly inconsistent. (This
inconsistency pre-dated the rewrite into C.) Make them consistent by
having them both key off the presence of the file.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The post-rewrite hook is supposed to be invoked for each rewritten
commit. The fact that a commit was selected and processed by the rebase
operation (even though when we hit an error a user said it had no more
useful changes), suggests we should write an entry for it. In
particular, let's treat it as an empty commit trivially squashed into
its parent.
This brings the rebase--am and rebase--merge backends in sync with the
behavior of the interactive rebase backend.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The post-rewrite hook is documented as being invoked by commands that
rewrite commits such as commit --amend and rebase, and that it will
be called for each rewritten commit.
Apparently, the three backends handled --skip'ed commits differently:
am: treat the skipped commit as though it weren't rewritten
merge: same as 'am' backend
interactive: treat skipped commits as having been rewritten to empty
(view them as an empty fixup to their parent)
For now, just add a testcase documenting the different behavior (use
--keep to force usage of the interactive machinery even though we have
no empty commits). A subsequent commit will remove the inconsistency in
--skip handling.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In commit f57696802c ("rebase: really just passthru the `git am`
options", 2018-11-14), the handling of `git am` options was simplified
dramatically (and an option parsing bug was fixed), but it introduced
a small regression in the error message shown when options only
understood by separate backends were used:
$ git rebase --keep --ignore-whitespace
fatal: cannot combine interactive options (--interactive, --exec,
--rebase-merges, --preserve-merges, --keep-empty, --root + --onto) with
am options (.git/rebase-apply/applying)
$ git rebase --merge --ignore-whitespace
fatal: cannot combine merge options (--merge, --strategy,
--strategy-option) with am options (.git/rebase-apply/applying)
Note that in both cases, the list of "am options" is
".git/rebase-apply/applying", which makes no sense. Since the lists of
backend-specific options is documented pretty thoroughly in the rebase
man page (in the "Incompatible Options" section, with multiple links
throughout the document), and since I expect this list to change over
time, just simplify the error message.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The conversion of the script version of rebase took messages that were
prefixed with "error:" and passed them along to die(), which adds a
"fatal:" prefix, thus resulting in messages of the form:
fatal: error: cannot combine...
which seems redundant. Remove the "error:" prefix from the builtin
version of rebase, and change the prefix from "error:" to "fatal:" in
the legacy script to match.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
t5570 being racy has been reported twice separately on the mailing
list [*1*, *2*].
To make the test race proof, we'd either have to introduce another
fifo the test snippet is waiting on, or somehow convincing "cat" to
flush (and let us know when it has). Which really implies killing the
daemon, and wait()ing on cat to process the EOF and exit. And that
makes the tests a lot more expensive if we have to start the daemon
for each snippet.
As this is a test for a relatively minor fix (according to the author)
in 19136be3f8 ("daemon: fix off-by-one in logging extended
attributes", 2018-01-24), drop it to avoid this racyness. It doesn't
seem worth making the test code much more complex, or slowing down all
tests just to keep this one.
*1*: 1522783990.964448.1325338528.0D49CC15@webmail.messagingengine.com/
*2*: 9d4e5224-9ff4-f3f8-519d-7b2a6f1ea7cd@web.de
Reported-by: Jan Palus <jpalus@fastmail.com>
Reported-by: Torsten Bögershausen <tboegi@web.de>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
