Commit bde42f08 authored by Junio C Hamano's avatar Junio C Hamano

Merge branch 'jk/difftool-command-not-found' into maint

"git difftool" by default ignores the error exit from the backend
commands it spawns, because often they signal that they found
differences by exiting with a non-zero status code just like "diff"
does; the exit status codes 126 and above however are special in
that they are used to signal that the command is not executable,
does not exist, or killed by a signal.  "git difftool" has been
taught to notice these exit status codes.

* jk/difftool-command-not-found:
  difftool: always honor fatal error exit codes
parents 7c964719 45a4f5d9
......@@ -86,6 +86,13 @@ else
launch_merge_tool "$1" "$2" "$5"
if test $status -ge 126
# Command not found (127), not executable (126) or
# exited via a signal (>= 128).
exit $status
if test "$status" != 0 &&
......@@ -124,6 +124,12 @@ test_expect_success PERL 'difftool stops on error with --trust-exit-code' '
test_cmp expect actual
test_expect_success PERL 'difftool honors exit status if command not found' '
test_config difftool.nonexistent.cmd i-dont-exist &&
test_config difftool.trustExitCode false &&
test_must_fail git difftool -y -t nonexistent branch
test_expect_success PERL 'difftool honors --gui' '
difftool_test_setup &&
test_config merge.tool bogus-tool &&
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