use 5.008;
use strict;
use warnings;
+use Error qw(:try);
use File::Basename qw(dirname);
use File::Copy;
-use File::Compare;
use File::Find;
use File::stat;
use File::Path qw(mkpath rmtree);
exit($status | ($status >> 8));
}
+sub use_wt_file
+{
+ my ($repo, $workdir, $file, $sha1, $symlinks) = @_;
+ my $null_sha1 = '0' x 40;
+
+ if ($sha1 ne $null_sha1 and not $symlinks) {
+ return 0;
+ }
+
+ my $wt_sha1 = $repo->command_oneline('hash-object', "$workdir/$file");
+ my $use = ($sha1 eq $null_sha1) || ($sha1 eq $wt_sha1);
+ return ($use, $wt_sha1);
+}
+
+sub changed_files
+{
+ my ($repo_path, $index, $worktree) = @_;
+ $ENV{GIT_INDEX_FILE} = $index;
+ $ENV{GIT_WORK_TREE} = $worktree;
+ my $must_unset_git_dir = 0;
+ if (not defined($ENV{GIT_DIR})) {
+ $must_unset_git_dir = 1;
+ $ENV{GIT_DIR} = $repo_path;
+ }
+
+ my @refreshargs = qw/update-index --really-refresh -q --unmerged/;
+ my @gitargs = qw/diff-files --name-only -z/;
+ try {
+ Git::command_oneline(@refreshargs);
+ } catch Git::Error::Command with {};
+
+ my $line = Git::command_oneline(@gitargs);
+ my @files;
+ if (defined $line) {
+ @files = split('\0', $line);
+ } else {
+ @files = ();
+ }
+
+ delete($ENV{GIT_INDEX_FILE});
+ delete($ENV{GIT_WORK_TREE});
+ delete($ENV{GIT_DIR}) if ($must_unset_git_dir);
+
+ return map { $_ => 1 } @files;
+}
+
sub setup_dir_diff
{
my ($repo, $workdir, $symlinks) = @_;
my $null_sha1 = '0' x 40;
my $lindex = '';
my $rindex = '';
+ my $wtindex = '';
my %submodule;
my %symlink;
my @working_tree = ();
}
if ($rmode ne $null_mode) {
- if ($rsha1 ne $null_sha1) {
- $rindex .= "$rmode $rsha1\t$dst_path\0";
+ my ($use, $wt_sha1) = use_wt_file($repo, $workdir,
+ $dst_path, $rsha1,
+ $symlinks);
+ if ($use) {
+ push @working_tree, $dst_path;
+ $wtindex .= "$rmode $wt_sha1\t$dst_path\0";
} else {
- push(@working_tree, $dst_path);
+ $rindex .= "$rmode $rsha1\t$dst_path\0";
}
}
}
$rc = system('git', 'checkout-index', '--all', "--prefix=$rdir/");
exit_cleanup($tmpdir, $rc) if $rc != 0;
+ $ENV{GIT_INDEX_FILE} = "$tmpdir/wtindex";
+ ($inpipe, $ctx) =
+ $repo->command_input_pipe(qw(update-index --info-only -z --index-info));
+ print($inpipe $wtindex);
+ $repo->command_close_pipe($inpipe, $ctx);
+
# If $GIT_DIR was explicitly set just for the update/checkout
# commands, then it should be unset before continuing.
delete($ENV{GIT_DIR}) if ($must_unset_git_dir);
delete($ENV{GIT_INDEX_FILE});
# Changes in the working tree need special treatment since they are
- # not part of the index
+ # not part of the index. Remove any trailing slash from $workdir
+ # before starting to avoid double slashes in symlink targets.
+ $workdir =~ s|/$||;
for my $file (@working_tree) {
my $dir = dirname($file);
unless (-d "$rdir/$dir") {
# should be copied back to the working tree.
# Do not copy back files when symlinks are used and the
# external tool did not replace the original link with a file.
+ #
+ # These hashes are loaded lazily since they aren't needed
+ # in the common case of --symlinks and the difftool updating
+ # files through the symlink.
+ my %wt_modified;
+ my %tmp_modified;
+ my $indices_loaded = 0;
+
for my $file (@worktree) {
next if $symlinks && -l "$b/$file";
next if ! -f "$b/$file";
- my $diff = compare("$b/$file", "$workdir/$file");
- if ($diff == 0) {
- next;
- } elsif ($diff == -1) {
- my $errmsg = "warning: Could not compare ";
- $errmsg += "'$b/$file' with '$workdir/$file'\n";
+ if (!$indices_loaded) {
+ %wt_modified = changed_files($repo->repo_path(),
+ "$tmpdir/wtindex", "$workdir");
+ %tmp_modified = changed_files($repo->repo_path(),
+ "$tmpdir/wtindex", "$b");
+ $indices_loaded = 1;
+ }
+
+ if (exists $wt_modified{$file} and exists $tmp_modified{$file}) {
+ my $errmsg = "warning: Both files modified: ";
+ $errmsg .= "'$workdir/$file' and '$b/$file'.\n";
+ $errmsg .= "warning: Working tree file has been left.\n";
+ $errmsg .= "warning:\n";
warn $errmsg;
$error = 1;
- } elsif ($diff == 1) {
+ } elsif (exists $tmp_modified{$file}) {
my $mode = stat("$b/$file")->mode;
copy("$b/$file", "$workdir/$file") or
exit_cleanup($tmpdir, 1);