mirror of
https://github.com/git/git.git
synced 2024-05-30 06:46:10 +02:00
1fff303fc2
Simplify and speed up the process of finding the git worktree when running on Windows by keeping it in perl and avoiding spawning helper processes. Signed-off-by: Ben Peart <benpeart@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
115 lines
3.2 KiB
Perl
Executable File
115 lines
3.2 KiB
Perl
Executable File
#!/usr/bin/perl
|
|
|
|
use strict;
|
|
use warnings;
|
|
use IPC::Open2;
|
|
|
|
# An example hook script to integrate Watchman
|
|
# (https://facebook.github.io/watchman/) with git to speed up detecting
|
|
# new and modified files.
|
|
#
|
|
# The hook is passed a version (currently 1) and a time in nanoseconds
|
|
# formatted as a string and outputs to stdout all files that have been
|
|
# modified since the given time. Paths must be relative to the root of
|
|
# the working tree and separated by a single NUL.
|
|
#
|
|
# To enable this hook, rename this file to "query-watchman" and set
|
|
# 'git config core.fsmonitor .git/hooks/query-watchman'
|
|
#
|
|
my ($version, $time) = @ARGV;
|
|
|
|
# Check the hook interface version
|
|
|
|
if ($version == 1) {
|
|
# convert nanoseconds to seconds
|
|
$time = int $time / 1000000000;
|
|
} else {
|
|
die "Unsupported query-fsmonitor hook version '$version'.\n" .
|
|
"Falling back to scanning...\n";
|
|
}
|
|
|
|
my $git_work_tree;
|
|
if ($^O =~ 'msys' || $^O =~ 'cygwin') {
|
|
$git_work_tree = Win32::GetCwd();
|
|
$git_work_tree =~ tr/\\/\//;
|
|
} else {
|
|
require Cwd;
|
|
$git_work_tree = Cwd::cwd();
|
|
}
|
|
|
|
my $retry = 1;
|
|
|
|
launch_watchman();
|
|
|
|
sub launch_watchman {
|
|
|
|
my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j --no-pretty')
|
|
or die "open2() failed: $!\n" .
|
|
"Falling back to scanning...\n";
|
|
|
|
# In the query expression below we're asking for names of files that
|
|
# changed since $time but were not transient (ie created after
|
|
# $time but no longer exist).
|
|
#
|
|
# To accomplish this, we're using the "since" generator to use the
|
|
# recency index to select candidate nodes and "fields" to limit the
|
|
# output to file names only. Then we're using the "expression" term to
|
|
# further constrain the results.
|
|
#
|
|
# The category of transient files that we want to ignore will have a
|
|
# creation clock (cclock) newer than $time_t value and will also not
|
|
# currently exist.
|
|
|
|
my $query = <<" END";
|
|
["query", "$git_work_tree", {
|
|
"since": $time,
|
|
"fields": ["name"],
|
|
"expression": ["not", ["allof", ["since", $time, "cclock"], ["not", "exists"]]]
|
|
}]
|
|
END
|
|
|
|
print CHLD_IN $query;
|
|
close CHLD_IN;
|
|
my $response = do {local $/; <CHLD_OUT>};
|
|
|
|
die "Watchman: command returned no output.\n" .
|
|
"Falling back to scanning...\n" if $response eq "";
|
|
die "Watchman: command returned invalid output: $response\n" .
|
|
"Falling back to scanning...\n" unless $response =~ /^\{/;
|
|
|
|
my $json_pkg;
|
|
eval {
|
|
require JSON::XS;
|
|
$json_pkg = "JSON::XS";
|
|
1;
|
|
} or do {
|
|
require JSON::PP;
|
|
$json_pkg = "JSON::PP";
|
|
};
|
|
|
|
my $o = $json_pkg->new->utf8->decode($response);
|
|
|
|
if ($retry > 0 and $o->{error} and $o->{error} =~ m/unable to resolve root .* directory (.*) is not watched/) {
|
|
print STDERR "Adding '$git_work_tree' to watchman's watch list.\n";
|
|
$retry--;
|
|
qx/watchman watch "$git_work_tree"/;
|
|
die "Failed to make watchman watch '$git_work_tree'.\n" .
|
|
"Falling back to scanning...\n" if $? != 0;
|
|
|
|
# Watchman will always return all files on the first query so
|
|
# return the fast "everything is dirty" flag to git and do the
|
|
# Watchman query just to get it over with now so we won't pay
|
|
# the cost in git to look up each individual file.
|
|
print "/\0";
|
|
eval { launch_watchman() };
|
|
exit 0;
|
|
}
|
|
|
|
die "Watchman: $o->{error}.\n" .
|
|
"Falling back to scanning...\n" if $o->{error};
|
|
|
|
binmode STDOUT, ":utf8";
|
|
local $, = "\0";
|
|
print @{$o->{files}};
|
|
}
|