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-rw-r--r--Documentation/git-difftool.txt14
-rwxr-xr-xgit-difftool--helper.sh9
-rwxr-xr-xgit-difftool.perl12
-rwxr-xr-xt/t7800-difftool.sh51
4 files changed, 85 insertions, 1 deletions
diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index 11887e63a0..333cf6ff91 100644
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -91,6 +91,15 @@ instead. `--no-symlinks` is the default on Windows.
the default diff tool will be read from the configured
`diff.guitool` variable instead of `diff.tool`.
+--[no-]trust-exit-code::
+ 'git-difftool' invokes a diff tool individually on each file.
+ Errors reported by the diff tool are ignored by default.
+ Use `--trust-exit-code` to make 'git-difftool' exit when an
+ invoked diff tool returns a non-zero exit code.
++
+'git-difftool' will forward the exit code of the invoked tool when
+'--trust-exit-code' is used.
+
See linkgit:git-diff[1] for the full list of supported options.
CONFIG VARIABLES
@@ -116,6 +125,11 @@ See the `--tool=<tool>` option above for more details.
difftool.prompt::
Prompt before each invocation of the diff tool.
+difftool.trustExitCode::
+ Exit difftool if the invoked diff tool returns a non-zero exit status.
++
+See the `--trust-exit-code` option above for more details.
+
SEE ALSO
--------
linkgit:git-diff[1]::
diff --git a/git-difftool--helper.sh b/git-difftool--helper.sh
index 7ef36b9482..d4fb6dfe13 100755
--- a/git-difftool--helper.sh
+++ b/git-difftool--helper.sh
@@ -49,7 +49,8 @@ launch_merge_tool () {
else
printf "Launch '%s' [Y/n]: " "$merge_tool"
fi
- if read ans && test "$ans" = n
+ read ans || return
+ if test "$ans" = n
then
return
fi
@@ -84,6 +85,12 @@ else
while test $# -gt 6
do
launch_merge_tool "$1" "$2" "$5"
+ status=$?
+ if test "$status" != 0 &&
+ test "$GIT_DIFFTOOL_TRUST_EXIT_CODE" = true
+ then
+ exit $status
+ fi
shift 7
done
fi
diff --git a/git-difftool.perl b/git-difftool.perl
index 598fcc23b9..7df7c8a9a7 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -342,6 +342,7 @@ sub main
symlinks => $^O ne 'cygwin' &&
$^O ne 'MSWin32' && $^O ne 'msys',
tool_help => undef,
+ trust_exit_code => undef,
);
GetOptions('g|gui!' => \$opts{gui},
'd|dir-diff' => \$opts{dirdiff},
@@ -352,6 +353,8 @@ sub main
'no-symlinks' => sub { $opts{symlinks} = 0; },
't|tool:s' => \$opts{difftool_cmd},
'tool-help' => \$opts{tool_help},
+ 'trust-exit-code' => \$opts{trust_exit_code},
+ 'no-trust-exit-code' => sub { $opts{trust_exit_code} = 0; },
'x|extcmd:s' => \$opts{extcmd});
if (defined($opts{help})) {
@@ -383,6 +386,15 @@ sub main
}
}
+ if (!defined $opts{trust_exit_code}) {
+ $opts{trust_exit_code} = Git::config_bool('difftool.trustExitCode');
+ }
+ if ($opts{trust_exit_code}) {
+ $ENV{GIT_DIFFTOOL_TRUST_EXIT_CODE} = 'true';
+ } else {
+ $ENV{GIT_DIFFTOOL_TRUST_EXIT_CODE} = 'false';
+ }
+
# 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
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index dc30a514bf..69bde7aa28 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -76,6 +76,49 @@ test_expect_success PERL 'difftool forwards arguments to diff' '
rm for-diff
'
+test_expect_success PERL 'difftool ignores exit code' '
+ test_config difftool.error.cmd false &&
+ git difftool -y -t error branch
+'
+
+test_expect_success PERL 'difftool forwards exit code with --trust-exit-code' '
+ test_config difftool.error.cmd false &&
+ test_must_fail git difftool -y --trust-exit-code -t error branch
+'
+
+test_expect_success PERL 'difftool honors difftool.trustExitCode = true' '
+ test_config difftool.error.cmd false &&
+ test_config difftool.trustExitCode true &&
+ test_must_fail git difftool -y -t error branch
+'
+
+test_expect_success PERL 'difftool honors difftool.trustExitCode = false' '
+ test_config difftool.error.cmd false &&
+ test_config difftool.trustExitCode false &&
+ git difftool -y -t error branch
+'
+
+test_expect_success PERL 'difftool ignores exit code with --no-trust-exit-code' '
+ test_config difftool.error.cmd false &&
+ test_config difftool.trustExitCode true &&
+ git difftool -y --no-trust-exit-code -t error branch
+'
+
+test_expect_success PERL 'difftool stops on error with --trust-exit-code' '
+ test_when_finished "rm -f for-diff .git/fail-right-file" &&
+ test_when_finished "git reset -- for-diff" &&
+ write_script .git/fail-right-file <<-\EOF &&
+ echo "$2"
+ exit 1
+ EOF
+ >for-diff &&
+ git add for-diff &&
+ echo file >expect &&
+ test_must_fail git difftool -y --trust-exit-code \
+ --extcmd .git/fail-right-file branch >actual &&
+ test_cmp expect actual
+'
+
test_expect_success PERL 'difftool honors --gui' '
difftool_test_setup &&
test_config merge.tool bogus-tool &&
@@ -301,6 +344,14 @@ test_expect_success PERL 'say no to the second file' '
! grep br2 output
'
+test_expect_success PERL 'ending prompt input with EOF' '
+ git difftool -x cat branch </dev/null >output &&
+ ! grep master output &&
+ ! grep branch output &&
+ ! grep m2 output &&
+ ! grep br2 output
+'
+
test_expect_success PERL 'difftool --tool-help' '
git difftool --tool-help >output &&
grep tool output