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fsmonitor: read from getcwd(), not the PWD environment variable

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Though the process has chdir'd to the root of the working tree, the
PWD environment variable is only guaranteed to be updated accordingly
if a shell is involved -- which is not guaranteed to be the case.
That is, if `/usr/bin/perl` is a binary, $ENV{PWD} is unchanged from
whatever spawned `git` -- if `/usr/bin/perl` is a trivial shell
wrapper to the real `perl`, `$ENV{PWD}` will have been updated to the
root of the working copy.

Update to read from the Cwd module using the `getcwd` syscall, not the
PWD environment variable.  The Cygwin case is left unchanged, as it
necessarily _does_ go through a shell.

Signed-off-by: Alex Vandiver <alexmv@dropbox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Alex Vandiver
2017-11-09 11:58:09 -08:00
committed by Junio C Hamano
parent ba1b9caca6
commit 6f1dc21d98
2 changed files with 4 additions and 2 deletions
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3
templates/hooks--fsmonitor-watchman.sample
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@@ -40,7 +40,8 @@ if ($system =~ m/^MSYS_NT/ || $system =~ m/^MINGW/) {
$git_work_tree =~ s/[\r\n]+//g;
$git_work_tree =~ s,\\,/,g;
} else {
$git_work_tree = $ENV{'PWD'};
require Cwd;
$git_work_tree = Cwd::cwd();
}
my $retry = 1;