From 9ec26e797781239b36ebccb87c590e5778358007 Mon Sep 17 00:00:00 2001
From: John Keeping <john@keeping.me.uk>
Date: Mon, 18 Jul 2016 20:57:54 -0700
Subject: [PATCH 1/3] difftool: fix argument handling in subdirs
When in a subdirectory of a repository, path arguments should be
interpreted relative to the current directory not the root of the
working tree.
The Git::repository object passed into setup_dir_diff() is configured to
handle this correctly but we create a new Git::repository here without
setting the WorkingSubdir argument. By simply using the existing
repository, path arguments are handled relative to the current
directory.
Reported-by: Bernhard Kirchen <bernhard.kirchen@rwth-aachen.de>
Signed-off-by: John Keeping <john@keeping.me.uk>
Acked-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
git-difftool.perl | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/git-difftool.perl b/git-difftool.perl
index ebd13baa6e0..c9d3ef887f9 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -115,16 +115,9 @@ sub setup_dir_diff
{
my ($repo, $workdir, $symlinks) = @_;
- # Run the diff; exit immediately if no diff found
- # 'Repository' and 'WorkingCopy' must be explicitly set to insure that
- # if $GIT_DIR and $GIT_WORK_TREE are set in ENV, they are actually used
- # by Git->repository->command*.
my $repo_path = $repo->repo_path();
- my %repo_args = (Repository => $repo_path, WorkingCopy => $workdir);
- my $diffrepo = Git->repository(%repo_args);
-
my @gitargs = ('diff', '--raw', '--no-abbrev', '-z', @ARGV);
- my $diffrtn = $diffrepo->command_oneline(@gitargs);
+ my $diffrtn = $repo->command_oneline(@gitargs);
exit(0) unless defined($diffrtn);
# Build index info for left and right sides of the diff
@@ -176,12 +169,12 @@ EOF
if ($lmode eq $symlink_mode) {
$symlink{$src_path}{left} =
- $diffrepo->command_oneline('show', "$lsha1");
+ $repo->command_oneline('show', "$lsha1");
}
if ($rmode eq $symlink_mode) {
$symlink{$dst_path}{right} =
- $diffrepo->command_oneline('show', "$rsha1");
+ $repo->command_oneline('show', "$rsha1");
}
if ($lmode ne $null_mode and $status !~ /^C/) {
From 98f917ed421a477e0575c58f801ac25f0e261b9d Mon Sep 17 00:00:00 2001
From: David Aguilar <davvid@gmail.com>
Date: Mon, 18 Jul 2016 20:57:55 -0700
Subject: [PATCH 2/3] difftool: avoid $GIT_DIR and $GIT_WORK_TREE
Environment variables are global and hard to reason about.
Use the `--git-dir` and `--work-tree` arguments when invoking `git`
instead of relying on the environment.
Add a test to ensure that difftool's dir-diff feature works when these
variables are present in the environment.
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
git-difftool.perl | 27 ++++++---------------------
t/t7800-difftool.sh | 14 ++++++++++++++
2 files changed, 20 insertions(+), 21 deletions(-)
diff --git a/git-difftool.perl b/git-difftool.perl
index c9d3ef887f9..c81cbe4ffa7 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -83,20 +83,17 @@ sub changed_files
{
my ($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/;
+ my @gitargs = ('--git-dir', $repo_path, '--work-tree', $worktree);
+ my @refreshargs = (
+ @gitargs, 'update-index',
+ '--really-refresh', '-q', '--unmerged');
try {
Git::command_oneline(@refreshargs);
} catch Git::Error::Command with {};
- my $line = Git::command_oneline(@gitargs);
+ my @diffargs = (@gitargs, 'diff-files', '--name-only', '-z');
+ my $line = Git::command_oneline(@diffargs);
my @files;
if (defined $line) {
@files = split('\0', $line);
@@ -105,8 +102,6 @@ sub changed_files
}
delete($ENV{GIT_INDEX_FILE});
- delete($ENV{GIT_WORK_TREE});
- delete($ENV{GIT_DIR}) if ($must_unset_git_dir);
return map { $_ => 1 } @files;
}
@@ -204,15 +199,6 @@ EOF
mkpath($ldir) or exit_cleanup($tmpdir, 1);
mkpath($rdir) or exit_cleanup($tmpdir, 1);
- # If $GIT_DIR is not set prior to calling 'git update-index' and
- # 'git checkout-index', then those commands will fail if difftool
- # is called from a directory other than the repo root.
- my $must_unset_git_dir = 0;
- if (not defined($ENV{GIT_DIR})) {
- $must_unset_git_dir = 1;
- $ENV{GIT_DIR} = $repo_path;
- }
-
# Populate the left and right directories based on each index file
my ($inpipe, $ctx);
$ENV{GIT_INDEX_FILE} = "$tmpdir/lindex";
@@ -241,7 +227,6 @@ EOF
# 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
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index 7ce4cd753eb..cb25480e1f7 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -412,6 +412,20 @@ run_dir_diff_test 'difftool --dir-diff from subdirectory' '
)
'
+run_dir_diff_test 'difftool --dir-diff from subdirectory with GIT_DIR set' '
+ (
+ GIT_DIR=$(pwd)/.git &&
+ export GIT_DIR &&
+ GIT_WORK_TREE=$(pwd) &&
+ export GIT_WORK_TREE &&
+ cd sub &&
+ git difftool --dir-diff $symlinks --extcmd ls \
+ branch -- sub >output &&
+ grep sub output &&
+ ! grep file output
+ )
+'
+
run_dir_diff_test 'difftool --dir-diff when worktree file is missing' '
test_when_finished git reset --hard &&
rm file2 &&
From 32b8c581ecf35e73bebe2c6e9f6de617807b7f91 Mon Sep 17 00:00:00 2001
From: David Aguilar <davvid@gmail.com>
Date: Mon, 18 Jul 2016 20:57:56 -0700
Subject: [PATCH 3/3] difftool: use Git::* functions instead of passing around
state
Call Git::command() and friends directly wherever possible.
This makes it clear that these operations can be invoked directly
without needing to manage the current directory and related GIT_*
environment variables.
Eliminate find_repository() since we can now use wc_path() and
not worry about side-effects involving environment variables.
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
git-difftool.perl | 52 +++++++++++++++++++----------------------------
1 file changed, 21 insertions(+), 31 deletions(-)
diff --git a/git-difftool.perl b/git-difftool.perl
index c81cbe4ffa7..a5790d03a07 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -37,14 +37,6 @@ USAGE
exit($exitcode);
}
-sub find_worktree
-{
- # Git->repository->wc_path() does not honor changes to the working
- # tree location made by $ENV{GIT_WORK_TREE} or the 'core.worktree'
- # config variable.
- return Git::command_oneline('rev-parse', '--show-toplevel');
-}
-
sub print_tool_help
{
# See the comment at the bottom of file_diff() for the reason behind
@@ -67,14 +59,14 @@ sub exit_cleanup
sub use_wt_file
{
- my ($repo, $workdir, $file, $sha1) = @_;
+ my ($workdir, $file, $sha1) = @_;
my $null_sha1 = '0' x 40;
if (-l "$workdir/$file" || ! -e _) {
return (0, $null_sha1);
}
- my $wt_sha1 = $repo->command_oneline('hash-object', "$workdir/$file");
+ my $wt_sha1 = Git::command_oneline('hash-object', "$workdir/$file");
my $use = ($sha1 eq $null_sha1) || ($sha1 eq $wt_sha1);
return ($use, $wt_sha1);
}
@@ -108,11 +100,9 @@ sub changed_files
sub setup_dir_diff
{
- my ($repo, $workdir, $symlinks) = @_;
-
- my $repo_path = $repo->repo_path();
+ my ($workdir, $symlinks) = @_;
my @gitargs = ('diff', '--raw', '--no-abbrev', '-z', @ARGV);
- my $diffrtn = $repo->command_oneline(@gitargs);
+ my $diffrtn = Git::command_oneline(@gitargs);
exit(0) unless defined($diffrtn);
# Build index info for left and right sides of the diff
@@ -164,12 +154,12 @@ EOF
if ($lmode eq $symlink_mode) {
$symlink{$src_path}{left} =
- $repo->command_oneline('show', "$lsha1");
+ Git::command_oneline('show', $lsha1);
}
if ($rmode eq $symlink_mode) {
$symlink{$dst_path}{right} =
- $repo->command_oneline('show', "$rsha1");
+ Git::command_oneline('show', $rsha1);
}
if ($lmode ne $null_mode and $status !~ /^C/) {
@@ -181,8 +171,8 @@ EOF
if ($working_tree_dups{$dst_path}++) {
next;
}
- my ($use, $wt_sha1) = use_wt_file($repo, $workdir,
- $dst_path, $rsha1);
+ my ($use, $wt_sha1) =
+ use_wt_file($workdir, $dst_path, $rsha1);
if ($use) {
push @working_tree, $dst_path;
$wtindex .= "$rmode $wt_sha1\t$dst_path\0";
@@ -203,27 +193,27 @@ EOF
my ($inpipe, $ctx);
$ENV{GIT_INDEX_FILE} = "$tmpdir/lindex";
($inpipe, $ctx) =
- $repo->command_input_pipe(qw(update-index -z --index-info));
+ Git::command_input_pipe('update-index', '-z', '--index-info');
print($inpipe $lindex);
- $repo->command_close_pipe($inpipe, $ctx);
+ Git::command_close_pipe($inpipe, $ctx);
my $rc = system('git', 'checkout-index', '--all', "--prefix=$ldir/");
exit_cleanup($tmpdir, $rc) if $rc != 0;
$ENV{GIT_INDEX_FILE} = "$tmpdir/rindex";
($inpipe, $ctx) =
- $repo->command_input_pipe(qw(update-index -z --index-info));
+ Git::command_input_pipe('update-index', '-z', '--index-info');
print($inpipe $rindex);
- $repo->command_close_pipe($inpipe, $ctx);
+ Git::command_close_pipe($inpipe, $ctx);
$rc = system('git', 'checkout-index', '--all', "--prefix=$rdir/");
exit_cleanup($tmpdir, $rc) if $rc != 0;
$ENV{GIT_INDEX_FILE} = "$tmpdir/wtindex";
($inpipe, $ctx) =
- $repo->command_input_pipe(qw(update-index --info-only -z --index-info));
+ Git::command_input_pipe('update-index', '--info-only', '-z', '--index-info');
print($inpipe $wtindex);
- $repo->command_close_pipe($inpipe, $ctx);
+ Git::command_close_pipe($inpipe, $ctx);
# If $GIT_DIR was explicitly set just for the update/checkout
# commands, then it should be unset before continuing.
@@ -393,9 +383,9 @@ sub dir_diff
my $rc;
my $error = 0;
my $repo = Git->repository();
- my $workdir = find_worktree();
- my ($a, $b, $tmpdir, @worktree) =
- setup_dir_diff($repo, $workdir, $symlinks);
+ my $repo_path = $repo->repo_path();
+ my $workdir = $repo->wc_path();
+ my ($a, $b, $tmpdir, @worktree) = setup_dir_diff($workdir, $symlinks);
if (defined($extcmd)) {
$rc = system($extcmd, $a, $b);
@@ -421,10 +411,10 @@ sub dir_diff
next if ! -f "$b/$file";
if (!$indices_loaded) {
- %wt_modified = changed_files($repo->repo_path(),
- "$tmpdir/wtindex", "$workdir");
- %tmp_modified = changed_files($repo->repo_path(),
- "$tmpdir/wtindex", "$b");
+ %wt_modified = changed_files(
+ $repo_path, "$tmpdir/wtindex", $workdir);
+ %tmp_modified = changed_files(
+ $repo_path, "$tmpdir/wtindex", $b);
$indices_loaded = 1;
}