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As CodingGuidelines says, some versions of bash errors out when
$variable substitution is used as the target for redirection without
being quoted (even though POSIX may not require such a quote).
Signed-off-by: Charles Bailey <cbailey32@bloomberg.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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804098bb (git rebase -i: add static check for commands and SHA-1,
2015-06-29) tried to check all insns before running any in the todo
list, but it did so by implementing its own parser that is a lot
stricter than necessary. We used to allow lines that are indented
(including comment lines), and we used to allow a whitespace between
the insn and the commit object name to be HT, among other things,
that are flagged as an invalid line by mistake.
Fix this by using the same tokenizer that is used to parse the todo
list file in the new check.
Whether it's a good thing to accept indented comments is
debatable (other commands like "git commit" do not accept them), but we
already accepted them in the past, and some people and scripts rely on
this behavior. Also, a line starting with space followed by a '#' cannot
have any meaning other than being a comment, hence it doesn't harm to
accept them as comments.
Largely based on patch by: Junio C Hamano <gitster@pobox.com>
[jc: updated test with quickfix from Torsten Bögershausen]
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The git-rebase-todo is parsed several times with different parsers. In
principle, the user input is normalized by transform_todo_ids and
further parsing can be stricter.
In case the user wrote
pick deadbeef<TAB>commit message
the parser of transform_todo_ids was considering the sha1 to be
"deadbeef<TAB>commit", and was leaving the tab in the transformed sheet.
In practice, this went unnoticed since the actual command interpretation
was done later in do_next which did accept the tab as a separator.
Make it explicit in the code of transform_todo_ids that tabs are
accepted. This way, code that mimicks it will also accept tabs as
separator.
A similar construct appears in skip_unnecessary_picks, but this one
comes after transform_todo_ids, hence reads the normalized format, so it
needs not be changed.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Check before the start of the rebasing if the commands exists, and for
the commands expecting a SHA-1, check if the SHA-1 is present and
corresponds to a commit. In case of error, print the error, stop git
rebase and prompt the user to fix with 'git rebase --edit-todo' or to
abort.
This allows to avoid doing half of a rebase before finding an error
and giving back what's left of the todo list to the user and prompt
him to fix when it might be too late for him to do so (he might have
to abort and restart the rebase).
Signed-off-by: Galan Rémi <remi.galan-alfonso@ensimag.grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Check if commits were removed (i.e. a line was deleted) and print
warnings or stop git rebase depending on the value of the
configuration variable rebase.missingCommitsCheck.
This patch gives the user the possibility to avoid silent loss of
information (losing a commit through deleting the line in this case)
if he wants.
Add the configuration variable rebase.missingCommitsCheck.
- When unset or set to "ignore", no checking is done.
- When set to "warn", the commits are checked, warnings are
displayed but git rebase still proceeds.
- When set to "error", the commits are checked, warnings are
displayed and the rebase is stopped.
(The user can then use 'git rebase --edit-todo' and
'git rebase --continue', or 'git rebase --abort')
rebase.missingCommitsCheck defaults to "ignore".
Signed-off-by: Galan Rémi <remi.galan-alfonso@ensimag.grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Instead of removing a line to remove the commit, you can use the
command "drop" (just like "pick" or "edit"). It has the same effect as
deleting the line (removing the commit) except that you keep a visual
trace of your actions, allowing a better control and reducing the
possibility of removing a commit by mistake.
Signed-off-by: Galan Rémi <remi.galan-alfonso@ensimag.grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* nd/untracked-cache:
t7063: hide stderr from setup inside prereq
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When t7063 starts, it runs "update-index --untracked-cache"
to see if we support the untracked cache. Its output goes
straight to stderr, even if the test is not run with "-v".
Let's wrap it in a prereq that will hide the output by
default, but show it with "-v".
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git rev-list --objects $old --not --all" to see if everything that
is reachable from $old is already connected to the existing refs
was very inefficient.
* jk/still-interesting:
limit_list: avoid quadratic behavior from still_interesting
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"hash-object --literally" introduced in v2.2 was not prepared to
take a really long object type name.
* jc/hash-object:
write_sha1_file(): do not use a separate sha1[] array
t1007: add hash-object --literally tests
hash-object --literally: fix buffer overrun with extra-long object type
git-hash-object.txt: document --literally option
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"git rebase --quiet" was not quite quiet when there is nothing to
do.
* jk/rebase-quiet-noop:
rebase: silence "git checkout" for noop rebase
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The completion for "log --decorate=" parameter value was incorrect.
* sg/complete-decorate-full-not-long:
completion: fix and update 'git log --decorate=' options
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"filter-branch" corrupted commit log message that ends with an
incomplete line on platforms with some "sed" implementations that
munge such a line. Work it around by avoiding to use "sed".
* jk/filter-branch-use-of-sed-on-incomplete-line:
filter-branch: avoid passing commit message through sed
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"git daemon" fails to build from the source under NO_IPV6
configuration (regression in 2.4).
* jc/daemon-no-ipv6-for-2.4.1:
daemon: unbreak NO_IPV6 build regression
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"git stash pop/apply" forgot to make sure that not just the working
tree is clean but also the index is clean. The latter is important
as a stash application can conflict and the index will be used for
conflict resolution.
* jk/stash-require-clean-index:
stash: require a clean index to apply
t3903: avoid applying onto dirty index
t3903: stop hard-coding commit sha1s
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We have prepended $GIT_EXEC_PATH and the path "git" is installed in
(typically "/usr/bin") to $PATH when invoking subprograms and hooks
for almost eternity, but the original use case the latter tried to
support was semi-bogus (i.e. install git to /opt/foo/git and run it
without having /opt/foo on $PATH), and more importantly it has
become less and less relevant as Git grew more mainstream (i.e. the
users would _want_ to have it on their $PATH). Stop prepending the
path in which "git" is installed to users' $PATH, as that would
interfere the command search order people depend on (e.g. they may
not like versions of programs that are unrelated to Git in /usr/bin
and want to override them by having different ones in /usr/local/bin
and have the latter directory earlier in their $PATH).
* jk/git-no-more-argv0-path-munging:
stop putting argv[0] dirname at front of PATH
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Teach the index to optionally remember already seen untracked files
to speed up "git status" in a working tree with tons of cruft.
* nd/untracked-cache: (24 commits)
git-status.txt: advertisement for untracked cache
untracked cache: guard and disable on system changes
mingw32: add uname()
t7063: tests for untracked cache
update-index: test the system before enabling untracked cache
update-index: manually enable or disable untracked cache
status: enable untracked cache
untracked-cache: temporarily disable with $GIT_DISABLE_UNTRACKED_CACHE
untracked cache: mark index dirty if untracked cache is updated
untracked cache: print stats with $GIT_TRACE_UNTRACKED_STATS
untracked cache: avoid racy timestamps
read-cache.c: split racy stat test to a separate function
untracked cache: invalidate at index addition or removal
untracked cache: load from UNTR index extension
untracked cache: save to an index extension
ewah: add convenient wrapper ewah_serialize_strbuf()
untracked cache: don't open non-existent .gitignore
untracked cache: mark what dirs should be recursed/saved
untracked cache: record/validate dir mtime and reuse cached output
untracked cache: make a wrapper around {open,read,close}dir()
...
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When a good user sees the "too long, consider -uno" advice when
running `git status`, they should check out the man page to find out
more. This change suggests they try untracked cache before -uno.
Helped-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If the user enables untracked cache, then
- move worktree to an unsupported filesystem
- or simply upgrade OS
- or move the whole (portable) disk from one machine to another
- or access a shared fs from another machine
there's no guarantee that untracked cache can still function properly.
Record the worktree location and OS footprint in the cache. If it
changes, err on the safe side and disable the cache. The user can
'update-index --untracked-cache' again to make sure all conditions are
met.
This adds a new requirement that setup_git_directory* must be called
before read_cache() because we need worktree location by then, or the
cache is dropped.
This change does not cover all bases, you can fool it if you try
hard. The point is to stop accidents.
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Helped-by: brian m. carlson <sandals@crustytoothpaste.net>
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Overall time saving on "git status" is about 40% in the best case
scenario, removing ..collect_untracked() as the most time consuming
function. read and refresh index operations are now at the top (which
should drop when index-helper and/or watchman support is added). More
numbers and analysis below.
webkit.git
==========
169k files. 6k dirs. Lots of test data (i.e. not touched most of the
time)
Base status
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Index version 4 in split index mode and cache-tree populated. No
untracked cache. It shows how time is consumed by "git status". The
same settings are used for other repos below.
18:28:10.199679 builtin/commit.c:1394 performance: 0.000000451 s: cmd_status:setup
18:28:10.474847 read-cache.c:1407 performance: 0.274873831 s: read_index
18:28:10.475295 read-cache.c:1407 performance: 0.000000656 s: read_index
18:28:10.728443 preload-index.c:131 performance: 0.253147487 s: read_index_preload
18:28:10.741422 read-cache.c:1254 performance: 0.012868340 s: refresh_index
18:28:10.752300 wt-status.c:623 performance: 0.010421357 s: wt_status_collect_changes_worktree
18:28:10.762069 wt-status.c:629 performance: 0.009644748 s: wt_status_collect_changes_index
18:28:11.601019 wt-status.c:632 performance: 0.838859547 s: wt_status_collect_untracked
18:28:11.605939 builtin/commit.c:1421 performance: 0.004835004 s: cmd_status:update_index
18:28:11.606580 trace.c:415 performance: 1.407878388 s: git command: 'git' 'status'
Populating status
-----------------
This is after enabling untracked cache and the cache is still empty.
We see a slight increase in .._collect_untracked() and update_index
(because new cache has to be written to $GIT_DIR/index).
18:28:18.915213 builtin/commit.c:1394 performance: 0.000000326 s: cmd_status:setup
18:28:19.197364 read-cache.c:1407 performance: 0.281901416 s: read_index
18:28:19.197754 read-cache.c:1407 performance: 0.000000546 s: read_index
18:28:19.451355 preload-index.c:131 performance: 0.253599607 s: read_index_preload
18:28:19.464400 read-cache.c:1254 performance: 0.012935336 s: refresh_index
18:28:19.475115 wt-status.c:623 performance: 0.010236920 s: wt_status_collect_changes_worktree
18:28:19.486022 wt-status.c:629 performance: 0.010801685 s: wt_status_collect_changes_index
18:28:20.362660 wt-status.c:632 performance: 0.876551366 s: wt_status_collect_untracked
18:28:20.396199 builtin/commit.c:1421 performance: 0.033447969 s: cmd_status:update_index
18:28:20.396939 trace.c:415 performance: 1.482695902 s: git command: 'git' 'status'
Populated status
----------------
After the cache is populated, wt_status_collect_untracked() drops 82%
from 0.838s to 0.144s. Overall time drops 45%. Top offenders are now
read_index() and read_index_preload().
18:28:20.408605 builtin/commit.c:1394 performance: 0.000000457 s: cmd_status:setup
18:28:20.692864 read-cache.c:1407 performance: 0.283980458 s: read_index
18:28:20.693273 read-cache.c:1407 performance: 0.000000661 s: read_index
18:28:20.958814 preload-index.c:131 performance: 0.265540254 s: read_index_preload
18:28:20.972375 read-cache.c:1254 performance: 0.013437429 s: refresh_index
18:28:20.983959 wt-status.c:623 performance: 0.011146646 s: wt_status_collect_changes_worktree
18:28:20.993948 wt-status.c:629 performance: 0.009879094 s: wt_status_collect_changes_index
18:28:21.138125 wt-status.c:632 performance: 0.144084737 s: wt_status_collect_untracked
18:28:21.173678 builtin/commit.c:1421 performance: 0.035463949 s: cmd_status:update_index
18:28:21.174251 trace.c:415 performance: 0.766707355 s: git command: 'git' 'status'
gentoo-x86.git
==============
This repository is a strange one with a balanced, wide and shallow
worktree (about 100k files and 23k dirs) and no .gitignore in
worktree. .._collect_untracked() time drops 88%, total time drops 56%.
Base status
-----------
18:20:40.828642 builtin/commit.c:1394 performance: 0.000000496 s: cmd_status:setup
18:20:41.027233 read-cache.c:1407 performance: 0.198130532 s: read_index
18:20:41.027670 read-cache.c:1407 performance: 0.000000581 s: read_index
18:20:41.171716 preload-index.c:131 performance: 0.144045594 s: read_index_preload
18:20:41.179171 read-cache.c:1254 performance: 0.007320424 s: refresh_index
18:20:41.185785 wt-status.c:623 performance: 0.006144638 s: wt_status_collect_changes_worktree
18:20:41.192701 wt-status.c:629 performance: 0.006780184 s: wt_status_collect_changes_index
18:20:41.991723 wt-status.c:632 performance: 0.798927029 s: wt_status_collect_untracked
18:20:41.994664 builtin/commit.c:1421 performance: 0.002852772 s: cmd_status:update_index
18:20:41.995458 trace.c:415 performance: 1.168427502 s: git command: 'git' 'status'
Populating status
-----------------
18:20:48.968848 builtin/commit.c:1394 performance: 0.000000380 s: cmd_status:setup
18:20:49.172918 read-cache.c:1407 performance: 0.203734214 s: read_index
18:20:49.173341 read-cache.c:1407 performance: 0.000000562 s: read_index
18:20:49.320013 preload-index.c:131 performance: 0.146671391 s: read_index_preload
18:20:49.328039 read-cache.c:1254 performance: 0.007921957 s: refresh_index
18:20:49.334680 wt-status.c:623 performance: 0.006172020 s: wt_status_collect_changes_worktree
18:20:49.342526 wt-status.c:629 performance: 0.007731746 s: wt_status_collect_changes_index
18:20:50.257510 wt-status.c:632 performance: 0.914864222 s: wt_status_collect_untracked
18:20:50.338371 builtin/commit.c:1421 performance: 0.080776477 s: cmd_status:update_index
18:20:50.338900 trace.c:415 performance: 1.371462446 s: git command: 'git' 'status'
Populated status
----------------
18:20:50.351160 builtin/commit.c:1394 performance: 0.000000571 s: cmd_status:setup
18:20:50.577358 read-cache.c:1407 performance: 0.225917338 s: read_index
18:20:50.577794 read-cache.c:1407 performance: 0.000000617 s: read_index
18:20:50.734140 preload-index.c:131 performance: 0.156345564 s: read_index_preload
18:20:50.745717 read-cache.c:1254 performance: 0.011463075 s: refresh_index
18:20:50.755176 wt-status.c:623 performance: 0.008877929 s: wt_status_collect_changes_worktree
18:20:50.763768 wt-status.c:629 performance: 0.008471633 s: wt_status_collect_changes_index
18:20:50.854885 wt-status.c:632 performance: 0.090988721 s: wt_status_collect_untracked
18:20:50.857765 builtin/commit.c:1421 performance: 0.002789097 s: cmd_status:update_index
18:20:50.858411 trace.c:415 performance: 0.508647673 s: git command: 'git' 'status'
linux-2.6
=========
Reference repo. Not too big. .._collect_status() drops 84%. Total time
drops 42%.
Base status
-----------
18:34:09.870122 builtin/commit.c:1394 performance: 0.000000385 s: cmd_status:setup
18:34:09.943218 read-cache.c:1407 performance: 0.072871177 s: read_index
18:34:09.943614 read-cache.c:1407 performance: 0.000000491 s: read_index
18:34:10.004364 preload-index.c:131 performance: 0.060748102 s: read_index_preload
18:34:10.008190 read-cache.c:1254 performance: 0.003714285 s: refresh_index
18:34:10.012087 wt-status.c:623 performance: 0.002775446 s: wt_status_collect_changes_worktree
18:34:10.016054 wt-status.c:629 performance: 0.003862140 s: wt_status_collect_changes_index
18:34:10.214747 wt-status.c:632 performance: 0.198604837 s: wt_status_collect_untracked
18:34:10.216102 builtin/commit.c:1421 performance: 0.001244166 s: cmd_status:update_index
18:34:10.216817 trace.c:415 performance: 0.347670735 s: git command: 'git' 'status'
Populating status
-----------------
18:34:16.595102 builtin/commit.c:1394 performance: 0.000000456 s: cmd_status:setup
18:34:16.666600 read-cache.c:1407 performance: 0.070992413 s: read_index
18:34:16.667012 read-cache.c:1407 performance: 0.000000606 s: read_index
18:34:16.729375 preload-index.c:131 performance: 0.062362492 s: read_index_preload
18:34:16.732565 read-cache.c:1254 performance: 0.003075517 s: refresh_index
18:34:16.736148 wt-status.c:623 performance: 0.002422201 s: wt_status_collect_changes_worktree
18:34:16.739990 wt-status.c:629 performance: 0.003746618 s: wt_status_collect_changes_index
18:34:16.948505 wt-status.c:632 performance: 0.208426710 s: wt_status_collect_untracked
18:34:16.961744 builtin/commit.c:1421 performance: 0.013151887 s: cmd_status:update_index
18:34:16.962233 trace.c:415 performance: 0.368537535 s: git command: 'git' 'status'
Populated status
----------------
18:34:16.970026 builtin/commit.c:1394 performance: 0.000000631 s: cmd_status:setup
18:34:17.046235 read-cache.c:1407 performance: 0.075904673 s: read_index
18:34:17.046644 read-cache.c:1407 performance: 0.000000681 s: read_index
18:34:17.113564 preload-index.c:131 performance: 0.066920253 s: read_index_preload
18:34:17.117281 read-cache.c:1254 performance: 0.003604055 s: refresh_index
18:34:17.121115 wt-status.c:623 performance: 0.002508345 s: wt_status_collect_changes_worktree
18:34:17.125089 wt-status.c:629 performance: 0.003871636 s: wt_status_collect_changes_index
18:34:17.156089 wt-status.c:632 performance: 0.030895703 s: wt_status_collect_untracked
18:34:17.169861 builtin/commit.c:1421 performance: 0.013686404 s: cmd_status:update_index
18:34:17.170391 trace.c:415 performance: 0.201474531 s: git command: 'git' 'status'
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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update_index_if_able() is moved down so that the updated untracked
cache could be written out.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This can be used to double check if results with untracked cache are
correctly, compared to vanilla version. Untracked cache remains in
index, but not used.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This could be used to verify correct behavior in tests
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When a directory is updated within the same second that its timestamp
is last saved, we cannot realize the directory has been updated by
checking timestamps. Assume the worst (something is update). See
29e4d36 (Racy GIT - 2005-12-20) for more information.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Ideally we should implement untracked_cache_remove_from_index() and
untracked_cache_add_to_index() so that they update untracked cache
right away instead of invalidating it and wait for read_directory()
next time to deal with it. But that may need some more work in
unpack-trees.c. So stay simple as the first step.
The new call in add_index_entry_with_check() may look strange because
new calls usually stay close to cache_tree_invalidate_path(). We do it
a bit later than c_t_i_p() in this function because if it's about
replacing the entry with the same name, we don't care (but cache-tree
does).
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Helped-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This cuts down a signficant number of open(.gitignore) because most
directories usually don't have .gitignore files.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If we redo this thing in a functional style, we would have one struct
untracked_dir as input tree and another as output. The input is used
for verification. The output is a brand new tree, reflecting current
worktree.
But that means recreate a lot of dir nodes even if a lot could be
shared between input and output trees in good cases. So we go with the
messy but efficient way, combining both input and output trees into
one. We need a way to know which node in this combined tree belongs to
the output. This is the purpose of this "recurse" flag.
"valid" bit can't be used for this because it's about data of the node
except the subdirs. When we invalidate a directory, we want to keep
cached data of the subdirs intact even though we don't really know
what subdir still exists (yet). Then we check worktree to see what
actual subdir remains on disk. Those will have 'recurse' bit set
again. If cached data for those are still valid, we may be able to
avoid computing exclude files for them. Those subdirs that are deleted
will have 'recurse' remained clear and their 'valid' bits do not
matter.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The main readdir loop in read_directory_recursive() is replaced with a
new one that checks if cached results of a directory is still valid.
If a file is added or removed from the index, the containing directory
is invalidated (but not its subdirs). If directory's mtime is changed,
the same happens. If a .gitignore is updated, the containing directory
and all subdirs are invalidated recursively. If dir_struct#flags or
other conditions change, the cache is ignored.
If a directory is invalidated, we opendir/readdir/closedir and run the
exclude machinery on that directory listing as usual. If untracked
cache is also enabled, we'll update the cache along the way. If a
directory is validated, we simply pull the untracked listing out from
the cache. The cache also records the list of direct subdirs that we
have to recurse in. Fully excluded directories are seen as "untracked
files".
In the best case when no dirs are invalidated, read_directory()
becomes a series of
stat(dir), open(.gitignore), fstat(), read(), close() and optionally
hash_sha1_file()
For comparison, standard read_directory() is a sequence of
opendir(), readdir(), open(.gitignore), fstat(), read(), close(), the
expensive last_exclude_matching() and closedir().
We already try not to open(.gitignore) if we know it does not exist,
so open/fstat/read/close sequence does not apply to every
directory. The sequence could be reduced further, as noted in
prep_exclude() in another patch. So in theory, the entire best-case
read_directory sequence could be reduced to a series of stat() and
nothing else.
This is not a silver bullet approach. When you compile a C file, for
example, the old .o file is removed and a new one with the same name
created, effectively invalidating the containing directory's cache
(but not its subdirectories). If your build process touches every
directory, this cache adds extra overhead for nothing, so it's a good
idea to separate generated files from tracked files.. Editors may use
the same strategy for saving files. And of course you're out of luck
running your repo on an unsupported filesystem and/or operating system.
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This allows us to feed different info to read_directory_recursive()
based on untracked cache in the next patch.
Helped-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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It's easy to see that if an existing .gitignore changes, its SHA-1
would be different and invalidate_gitignore() is called.
If .gitignore is removed, add_excludes() will treat it like an empty
.gitignore, which again should invalidate the cached directory data.
if .gitignore is added, lookup_untracked() already fills initial
.gitignore SHA-1 as "empty file", so again invalidate_gitignore() is
called.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Make sure the starting conditions and all global exclude files are
good to go. If not, either disable untracked cache completely, or wipe
out the cache and start fresh.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The idea is if we can capture all input and (non-rescursive) output of
read_directory_recursive(), and can verify later that all the input is
the same, then the second r_d_r() should produce the same output as in
the first run.
The requirement for this to work is stat info of a directory MUST
change if an entry is added to or removed from that directory (and
should not change often otherwise). If your OS and filesystem do not
meet this requirement, untracked cache is not for you. Most file
systems on *nix should be fine. On Windows, NTFS is fine while FAT may
not be [1] even though FAT on Linux seems to be fine.
The list of input of r_d_r() is in the big comment block in dir.h. In
short, the output of a directory (not counting subdirs) mainly depends
on stat info of the directory in question, all .gitignore leading to
it and the check_only flag when r_d_r() is called recursively. This
patch records all this info (and the output) as r_d_r() runs.
Two hash_sha1_file() are required for $GIT_DIR/info/exclude and
core.excludesfile unless their stat data matches. hash_sha1_file() is
only needed when .gitignore files in the worktree are modified,
otherwise their SHA-1 in index is used (see the previous patch).
We could store stat data for .gitignore files so we don't have to
rehash them if their content is different from index, but I think
.gitignore files are rarely modified, so not worth extra cache data
(and hashing penalty read-cache.c:verify_hdr(), as we will be storing
this as an index extension).
The implication is, if you change .gitignore, you better add it to the
index soon or you lose all the benefit of untracked cache because a
modified .gitignore invalidates all subdirs recursively. This is
especially bad for .gitignore at root.
This cached output is about untracked files only, not ignored files
because the number of tracked files is usually small, so small cache
overhead, while the number of ignored files could go really high
(e.g. *.o files mixing with source code).
[1] "Description of NTFS date and time stamps for files and folders"
http://support.microsoft.com/kb/299648
Helped-by: Torsten Bögershausen <tboegi@web.de>
Helped-by: David Turner <dturner@twopensource.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This is not used anywhere yet. But the goal is to compare quickly if a
.gitignore file has changed when we have the SHA-1 of both old (cached
somewhere) and new (from index or a tree) versions.
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The code to read pack-bitmap wanted to allocate a few hundred
pointers to a structure, but by mistake allocated and leaked memory
enough to hold that many actual structures. Correct the allocation
size and also have it on stack, as it is small enough.
* rs/plug-leak-in-pack-bitmaps:
pack-bitmaps: plug memory leak, fix allocation size for recent_bitmaps
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Use an automatic variable for recent_bitmaps, an array of pointers.
This way we don't allocate too much and don't have to free the memory
at the end. The old code over-allocated because it reserved enough
memory to store all of the structs it is only pointing to and never
freed it. 160 64-bit pointers take up 1280 bytes, which is not too
much to be placed on the stack.
MAX_XOR_OFFSET is turned into a preprocessor constant to make it
constant enough for use in an non-variable array declaration.
Noticed-by: Stefan Beller <stefanbeller@gmail.com>
Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The pull.ff configuration was supposed to override the merge.ff
configuration, but it didn't.
* pt/pull-ff-vs-merge-ff:
pull: parse pull.ff as a bool or string
pull: make pull.ff=true override merge.ff
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Since b814da8 (pull: add pull.ff configuration, 2014-01-15) git-pull
supported setting --(no-)ff via the pull.ff configuration value.
However, as it only matches the string values of "true" and "false", it
does not support other boolean aliases such as "on", "off", "1", "0".
This is inconsistent with the merge.ff setting, which supports these
aliases.
Fix this by using the bool_or_string_config function to retrieve the
value of pull.ff.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Reviewed-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Since b814da8 (pull: add pull.ff configuration, 2014-01-15), running
git-pull with the configuration pull.ff=false or pull.ff=only is
equivalent to passing --no-ff and --ff-only to git-merge. However, if
pull.ff=true, no switch is passed to git-merge. This leads to the
confusing behavior where pull.ff=false or pull.ff=only is able to
override merge.ff, while pull.ff=true is unable to.
Fix this by adding the --ff switch if pull.ff=true, and add a test to
catch future regressions.
Furthermore, clarify in the documentation that pull.ff overrides
merge.ff.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Reviewed-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git pull --log" and "git pull --no-log" worked as expected, but
"git pull --log=20" did not.
* pt/pull-log-n:
pull: handle --log=<n>
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