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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
-----------
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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| |\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
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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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Since efb779f (merge, pull: add '--(no-)log' command line option,
2008-04-06) git-pull supported the (--no-)log switch and would pass it
to git-merge.
96e9420 (merge: Make '--log' an integer option for number of shortlog
entries, 2010-09-08) implemented support for the --log=<n> switch, which
would explicitly set the number of shortlog entries. However, git-pull
does not recognize this option, and will instead pass it to git-fetch,
leading to "unknown option" errors.
Fix this by matching --log=* in addition to --log and --no-log.
Implement a test for this use case.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git rerere forget" in a repository without rerere enabled gave a
cryptic error message; it should be a silent no-op instead.
* jk/rerere-forget-check-enabled:
rerere: exit silently on "forget" when rerere is disabled
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If you run "git rerere forget foo" in a repository that does
not have rerere enabled, git hits an internal error:
$ git init -q
$ git rerere forget foo
fatal: BUG: attempt to commit unlocked object
The problem is that setup_rerere() will not actually take
the lock if the rerere system is disabled. We should notice
this and return early. We can return with a success code
here, because we know there is nothing to forget.
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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Doc consistency updates.
* ps/doc-packfile-vs-pack-file:
doc: fix inconsistent spelling of "packfile"
pack-protocol.txt: fix insconsistent spelling of "packfile"
git-unpack-objects.txt: fix inconsistent spelling of "packfile"
git-verify-pack.txt: fix inconsistent spelling of "packfile"
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Fix remaining instances where "pack-file" is used instead of
"packfile". Some places remain where we still use "pack-file",
This is the case when we explicitly refer to a file with a
".pack" extension as opposed to a data source providing a pack
data stream.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There was a commented-out (instead of being marked to expect
failure) test that documented a breakage that was fixed since the
test was written; turn it into a proper test.
* sb/t1020-cleanup:
subdirectory tests: code cleanup, uncomment test
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Back when these tests were written, we wanted to make sure that Git
notices it is in a bare repository and "git show -s HEAD" would
refrain from complaining that HEAD might mean a file it sees in its
current working directory (because it does not). But the version of
Git back then didn't behave well, without (doubly) being told that
it is inside a bare repository by exporting "GIT_DIR=.". The form
of the test we originally wanted to have was left commented out as
a reminder.
Nowadays the test as originally intended works, so add it to the
test suite. We'll keep the old test that explicitly sets GIT_DIR=.
to make sure that use case will not regress.
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The controlling tty-based heuristics to squelch progress output did
not consider that the process may not be talking to a tty at all
(e.g. sending the progress to sideband #2). This is a finishing
touch to a topic that is already in 'master'.
* lm/squelch-bg-progress:
progress: treat "no terminal" as being in the foreground
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progress: treat "no terminal" as being in the foreground
Commit 85cb890 (progress: no progress in background,
2015-04-13) avoids sending progress from background
processes by checking that the process group id of the
current process is the same as that of the controlling
terminal.
If we don't have a terminal, however, this check never
succeeds, and we print no progress at all (until the final
"done" message). This can be seen when cloning a large
repository; instead of getting progress updates for
"counting objects", it will appear to hang then print the
final count.
We can fix this by treating an error return from tcgetpgrp()
as a signal to show the progress.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Filter scripts were run with SIGPIPE disabled on the Git side,
expecting that they may not read what Git feeds them to filter.
We however treated a filter that does not read its input fully
before exiting as an error.
This changes semantics, but arguably in a good way. If a filter
can produce its output without consuming its input using whatever
magic, we now let it do so, instead of diagnosing it as a
programming error.
* jc/ignore-epipe-in-filter:
filter_buffer_or_fd(): ignore EPIPE
copy.c: make copy_fd() report its status silently
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We are explicitly ignoring SIGPIPE, as we fully expect that the
filter program may not read our output fully. Ignore EPIPE that
may come from writing to it as well.
A new test was stolen from Jeff's suggestion.
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When copy_fd() function encounters errors, it emits error messages
itself, which makes it impossible for callers to take responsibility
for reporting errors, especially when they want to ignore certain
errors.
Move the error reporting to its callers in preparation.
- copy_file() and copy_file_with_time() by indirection get their
own calls to error().
- hold_lock_file_for_append(), when told to die on error, used to
exit(128) relying on the error message from copy_fd(), but now it
does its own die() instead. Note that the callers that do not
pass LOCK_DIE_ON_ERROR need to be adjusted for this change, but
fortunately there is none ;-)
- filter_buffer_or_fd() has its own error() already, in addition to
the message from copy_fd(), so this will change the output but
arguably in a better way.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Git 2.4 broke setting verbosity and progress levels on "git clone"
with native transports.
* mh/clone-verbosity-fix:
clone: call transport_set_verbosity before anything else on the newly created transport
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created transport
Commit 2879bc3 made the progress and verbosity options sent to remote helper
earlier than they previously were. But nothing else after that would send
updates if the value is changed later on with transport_set_verbosity.
While for fetch and push, transport_set_verbosity is the first thing that
is done after creating the transport, it was not the case for clone. So
commit 2879bc3 broke changing progress and verbosity for clone, for urls
requiring a remote helper only (so, not git:// urls, for instance).
Moving transport_set_verbosity to just after the transport is created
works around the issue.
Signed-off-by: Mike Hommey <mh@glandium.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There was a dead code that used to handle "git pull --tags" and
show special-cased error message, which was made irrelevant when
the semantics of the option changed back in Git 1.9 days.
* pt/pull-tags-error-diag:
pull: remove --tags error in no merge candidates case
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Since 441ed41 ("git pull --tags": error out with a better message.,
2007-12-28), git pull --tags would print a different error message if
git-fetch did not return any merge candidates:
It doesn't make sense to pull all tags; you probably meant:
git fetch --tags
This is because at that time, git-fetch --tags would override any
configured refspecs, and thus there would be no merge candidates. The
error message was thus introduced to prevent confusion.
However, since c5a84e9 (fetch --tags: fetch tags *in addition to*
other stuff, 2013-10-30), git fetch --tags would fetch tags in addition
to any configured refspecs. Hence, if any no merge candidates situation
occurs, it is not because --tags was set. As such, this special error
message is now irrelevant.
To prevent confusion, remove this error message.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Instead of dying immediately upon failing to obtain a lock, retry
after a short while with backoff.
* mh/lockfile-retry:
lock_packed_refs(): allow retries when acquiring the packed-refs lock
lockfile: allow file locking to be retried with a timeout
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Currently, there is only one attempt to acquire any lockfile, and if
the lock is held by another process, the locking attempt fails
immediately.
This is not such a limitation for loose reference files. First, they
don't take long to rewrite. Second, most reference updates have a
known "old" value, so if another process is updating a reference at
the same moment that we are trying to lock it, then probably the
expected "old" value will not longer be valid, and the update will
fail anyway.
But these arguments do not hold for packed-refs:
* The packed-refs file can be large and take significant time to
rewrite.
* Many references are stored in a single packed-refs file, so it could
be that the other process was changing a different reference than
the one that we are interested in.
Therefore, it is much more likely for there to be spurious lock
conflicts in connection to the packed-refs file, resulting in
unnecessary command failures.
So, if the first attempt to lock the packed-refs file fails, continue
retrying for a configurable length of time before giving up. The
default timeout is 1 second.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Currently, there is only one attempt to lock a file. If it fails, the
whole operation fails.
But it might sometimes be advantageous to try acquiring a file lock a
few times before giving up. So add a new function,
hold_lock_file_for_update_timeout(), that allows a timeout to be
specified. Make hold_lock_file_for_update() a thin wrapper around the
new function.
If timeout_ms is positive, then retry for at least that many
milliseconds to acquire the lock. On each failed attempt, use select()
to wait for a backoff time that increases quadratically (capped at 1
second) and has a random component to prevent two processes from
getting synchronized. If timeout_ms is negative, retry indefinitely.
In a moment we will switch to using the new function when locking
packed-refs.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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