When 'difftool' is called to compare a range of commits that modify
more than one file, it opens a separate instance of the diff tool for
each file that changed.
The new '--dir-diff' option copies all the modified files to a temporary
location and runs a directory diff on them in a single instance of the
diff tool.
Signed-off-by: Tim Henigan <tim.henigan@xxxxxxxxx>
---
This update is intended to be applied to the branch currently found at
'th/difftool-diffall' (based on pu).
Changes in v10:
As Ramsay Jones pointed out on the Git list [1], t7800.3 is failing on
some systems because the exit code from difftool is incorrect.
difftool wraps some commands in 'git_cmd_try' blocks. If an exception is
raised, these blocks call Carp::croak to exit. However, there appears to
be a bug in Carp::croak that causes it to always exit with errno 9 "Bad
file descriptor" on some systems.
This happens even with a simple one-liner like:
perl -e 'use 5.008; use Carp qw(croak); print $!+0, " $!\n";'
The above is expected to print "0" and exit without error. However, on
the problem systems it prints "9 Bad file descriptor".
To fix the problem, we need to:
- Drop commit 0440ed72 (patch 7/9 "difftool: replace system call with
Git::command_noisy") from the series.
- Replace commit 6fbdb7b (patch 8/9 "difftool: teach difftool to handle
directory diffs") with this patch. This version changes all instances
of 'git_cmd_try' to simple 'system' calls.
[1]: http://thread.gmane.org/gmane.comp.version-control.git/194284/focus=194540
Documentation/git-difftool.txt | 6 ++
git-difftool--helper.sh | 19 +++--
git-difftool.perl | 158 +++++++++++++++++++++++++++++++++++-----
t/t7800-difftool.sh | 39 ++++++++++
4 files changed, 197 insertions(+), 25 deletions(-)
diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index fe38f66..aba5e76 100644
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -19,6 +19,12 @@ linkgit:git-diff[1].
OPTIONS
-------
+-d::
+--dir-diff::
+ Copy the modified files to a temporary location and perform
+ a directory diff on them. This mode never prompts before
+ launching the diff tool.
+
-y::
--no-prompt::
Do not prompt before launching a diff tool.
diff --git a/git-difftool--helper.sh b/git-difftool--helper.sh
index e6558d1..3d0fe0c 100755
--- a/git-difftool--helper.sh
+++ b/git-difftool--helper.sh
@@ -73,9 +73,16 @@ then
fi
fi
-# Launch the merge tool on each path provided by 'git diff'
-while test $# -gt 6
-do
- launch_merge_tool "$1" "$2" "$5"
- shift 7
-done
+if test -n "$GIT_DIFFTOOL_DIRDIFF"
+then
+ LOCAL="$1"
+ REMOTE="$2"
+ run_merge_tool "$merge_tool" false
+else
+ # Launch the merge tool on each path provided by 'git diff'
+ while test $# -gt 6
+ do
+ launch_merge_tool "$1" "$2" "$5"
+ shift 7
+ done
+fi
diff --git a/git-difftool.perl b/git-difftool.perl
index d4fe998..828c11e 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -1,21 +1,29 @@
#!/usr/bin/env perl
# Copyright (c) 2009, 2010 David Aguilar
+# Copyright (c) 2012 Tim Henigan
#
# This is a wrapper around the GIT_EXTERNAL_DIFF-compatible
# git-difftool--helper script.
#
# This script exports GIT_EXTERNAL_DIFF and GIT_PAGER for use by git.
-# GIT_DIFFTOOL_NO_PROMPT, GIT_DIFFTOOL_PROMPT, and GIT_DIFF_TOOL
-# are exported for use by git-difftool--helper.
+# GIT_DIFFTOOL_NO_PROMPT, GIT_DIFFTOOL_PROMPT, GIT_DIFFTOOL_DIRDIFF,
+# and GIT_DIFF_TOOL are exported for use by git-difftool--helper.
#
# Any arguments that are unknown to this script are forwarded to 'git diff'.
use 5.008;
use strict;
use warnings;
+use File::Basename qw(dirname);
+use File::Copy;
+use File::stat;
+use File::Path qw(mkpath);
+use File::Temp qw(tempdir);
use Getopt::Long qw(:config pass_through);
use Git;
+my @working_tree;
+
sub usage
{
my $exitcode = shift;
@@ -24,15 +32,109 @@ usage: git difftool [-t|--tool=<tool>]
[-x|--extcmd=<cmd>]
[-g|--gui] [--no-gui]
[--prompt] [-y|--no-prompt]
+ [-d|--dir-diff]
['git diff' options]
USAGE
exit($exitcode);
}
+sub setup_dir_diff
+{
+ # Run the diff; exit immediately if no diff found
+ my $repo = Git->repository();
+ my $diffrtn = $repo->command_oneline(['diff', '--raw', '--no-abbrev', '-z', @ARGV]);
+ exit(0) if (length($diffrtn) == 0);
+
+ # Setup temp directories
+ my $tmpdir = tempdir('git-diffall.XXXXX', CLEANUP => 1, TMPDIR => 1);
+ my $ldir = "$tmpdir/left";
+ my $rdir = "$tmpdir/right";
+ mkpath($ldir) or die $!;
+ mkpath($rdir) or die $!;
+
+ # Build index info for left and right sides of the diff
+ my $submodule_mode = "160000";
+ my $null_mode = 0 x 6;
+ my $null_sha1 = 0 x 40;
+ my $lindex = "";
+ my $rindex = "";
+ my %submodule;
+ my @rawdiff = split('\0', $diffrtn);
+
+ for (my $i=0; $i<@rawdiff; $i+=2) {
+ my ($lmode, $rmode, $lsha1, $rsha1, $status) = split(' ', substr($rawdiff[$i], 1));
+ my $path = $rawdiff[$i + 1];
+
+ if (($lmode eq $submodule_mode) or ($rmode eq $submodule_mode)) {
+ $submodule{$path}{left} = $lsha1;
+ $submodule{$path}{right} = $rsha1;
+ next;
+ }
+
+ if ($lmode ne $null_mode) {
+ $lindex .= "$lmode $lsha1\t$path\0";
+ }
+
+ if ($rmode ne $null_mode) {
+ if ($rsha1 ne $null_sha1) {
+ $rindex .= "$rmode $rsha1\t$path\0";
+ } else {
+ push(@working_tree, $path);
+ }
+ }
+ }
+
+ # Populate the left and right directories based on each index file
+ my ($inpipe, $ctx);
+ $ENV{GIT_DIR} = $repo->repo_path();
+ $ENV{GIT_INDEX_FILE} = "$tmpdir/lindex";
+ ($inpipe, $ctx) = $repo->command_input_pipe(qw/update-index -z --index-info/);
+ print($inpipe $lindex);
+ $repo->command_close_pipe($inpipe, $ctx);
+ system(('git', 'checkout-index', '--all', "--prefix=$ldir/"));
+
+ $ENV{GIT_INDEX_FILE} = "$tmpdir/rindex";
+ ($inpipe, $ctx) = $repo->command_input_pipe(qw/update-index -z --index-info/);
+ print($inpipe $rindex);
+ $repo->command_close_pipe($inpipe, $ctx);
+ system(('git', 'checkout-index', '--all', "--prefix=$rdir/"));
+
+ # Changes in the working tree need special treatment since they are
+ # not part of the index
+ my $workdir = $repo->repo_path() . "/..";
+ for (@working_tree) {
+ my $dir = dirname($_);
+ unless (-d "$rdir/$dir") {
+ mkpath("$rdir/$dir") or die $!;
+ }
+ copy("$workdir/$_", "$rdir/$_") or die $!;
+ chmod(stat("$workdir/$_")->mode, "$rdir/$_") or die $!;
+ }
+
+ # Changes to submodules require special treatment. This loop writes a
+ # temporary file to both the left and right directories to show the
+ # change in the recorded SHA1 for the submodule.
+ foreach my $path (keys %submodule) {
+ if (defined $submodule{$path}{left}) {
+ open(my $fh, ">", "$ldir/$path") or die $!;
+ print($fh "Subproject commit $submodule{$path}{left}");
+ close($fh);
+ }
+ if (defined $submodule{$path}{right}) {
+ open(my $fh, ">", "$rdir/$path") or die $!;
+ print($fh "Subproject commit $submodule{$path}{right}");
+ close($fh);
+ }
+ }
+
+ return ($ldir, $rdir);
+}
+
# parse command-line options. all unrecognized options and arguments
# are passed through to the 'git diff' command.
-my ($difftool_cmd, $extcmd, $gui, $help, $prompt);
+my ($difftool_cmd, $dirdiff, $extcmd, $gui, $help, $prompt);
GetOptions('g|gui!' => \$gui,
+ 'd|dir-diff' => \$dirdiff,
'h' => \$help,
'prompt!' => \$prompt,
'y' => sub { $prompt = 0; },
@@ -65,22 +167,40 @@ if ($gui) {
$ENV{GIT_DIFF_TOOL} = $guitool;
}
}
-if (defined($prompt)) {
- if ($prompt) {
- $ENV{GIT_DIFFTOOL_PROMPT} = 'true';
+
+# In directory diff mode, 'git-difftool--helper' is called once
+# to compare the a/b directories. In file diff mode, 'git diff'
+# will invoke a separate instance of 'git-difftool--helper' for
+# each file that changed.
+if (defined($dirdiff)) {
+ my ($a, $b) = setup_dir_diff();
+ if (defined($extcmd)) {
+ system(($extcmd, $a, $b));
} else {
- $ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true';
+ $ENV{GIT_DIFFTOOL_DIRDIFF} = 'true';
+ system(('git', 'difftool--helper', $a, $b));
+ }
+
+ # If the diff including working copy files and those
+ # files were modified during the diff, then the changes
+ # should be copied back to the working tree
+ my $repo = Git->repository();
+ my $workdir = $repo->repo_path() . "/..";
+ for (@working_tree) {
+ copy("$b/$_", "$workdir/$_") or die $!;
+ chmod(stat("$b/$_")->mode, "$workdir/$_") or die $!;
+ }
+} else {
+ if (defined($prompt)) {
+ if ($prompt) {
+ $ENV{GIT_DIFFTOOL_PROMPT} = 'true';
+ } else {
+ $ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true';
+ }
}
-}
-$ENV{GIT_PAGER} = '';
-$ENV{GIT_EXTERNAL_DIFF} = 'git-difftool--helper';
-my @command = ('git', 'diff', @ARGV);
-
-# ActiveState Perl for Win32 does not implement POSIX semantics of
-# exec* system call. It just spawns the given executable and finishes
-# the starting program, exiting with code 0.
-# system will at least catch the errors returned by git diff,
-# allowing the caller of git difftool better handling of failures.
-my $rc = system(@command);
-exit($rc | ($rc >> 8));
+ $ENV{GIT_PAGER} = '';
+ $ENV{GIT_EXTERNAL_DIFF} = 'git-difftool--helper';
+ my $rc = system(('git', 'diff', @ARGV));
+ exit($rc | ($rc >> 8));
+}
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index e716d06..478c1be 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -319,4 +319,43 @@ test_expect_success PERL 'say no to the second file' '
echo "$diff" | stdin_doesnot_contain br2
'
+test_expect_success PERL 'setup change in subdirectory' '
+ git checkout master &&
+ mkdir sub &&
+ echo master >sub/sub &&
+ git add sub/sub &&
+ git commit -m "added sub/sub" &&
+ echo test >>file &&
+ echo test >>sub/sub &&
+ git add . &&
+ git commit -m "modified both"
+'
+
+test_expect_success PERL 'difftool -d' '
+ diff=$(git difftool -d --extcmd ls branch) &&
+ echo "$diff" | stdin_contains sub &&
+ echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff' '
+ diff=$(git difftool --dir-diff --extcmd ls branch) &&
+ echo "$diff" | stdin_contains sub &&
+ echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff ignores --prompt' '
+ diff=$(git difftool --dir-diff --prompt --extcmd ls branch) &&
+ echo "$diff" | stdin_contains sub &&
+ echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff from subdirectory' '
+ (
+ cd sub &&
+ diff=$(git difftool --dir-diff --extcmd ls branch) &&
+ echo "$diff" | stdin_contains sub &&
+ echo "$diff" | stdin_contains file
+ )
+'
+
test_done
--
1.7.10.rc1.28.geb866
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