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authorJunio C Hamano <gitster@pobox.com>2013-12-27 22:58:17 (GMT)
committerJunio C Hamano <gitster@pobox.com>2013-12-27 22:58:17 (GMT)
commit73b063130befa7475316a142343de87da61f31e3 (patch)
tree3079b4e1f628ff89bcc0a4e5dbb42985e2c7b3a0 /builtin/diff.c
parent6904f9aa5ba7666cdb5390733225e123fe25526b (diff)
parentaad90e85f8e6368533aa30c072b8e2bd7adafa53 (diff)
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Merge branch 'tg/diff-no-index-refactor'
"git diff ../else/where/A ../else/where/B" when ../else/where is clearly outside the repository, and "git diff --no-index A B", do not have to look at the index at all, but we used to read the index unconditionally. * tg/diff-no-index-refactor: diff: avoid some nesting diff: add test for --no-index executed outside repo diff: don't read index when --no-index is given diff: move no-index detection to builtin/diff.c
Diffstat (limited to 'builtin/diff.c')
-rw-r--r--builtin/diff.c58
1 files changed, 53 insertions, 5 deletions
diff --git a/builtin/diff.c b/builtin/diff.c
index fe0cc7f..0f247d2 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -16,6 +16,9 @@
#include "submodule.h"
#include "sha1-array.h"
+#define DIFF_NO_INDEX_EXPLICIT 1
+#define DIFF_NO_INDEX_IMPLICIT 2
+
struct blobinfo {
unsigned char sha1[20];
const char *name;
@@ -259,7 +262,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
struct object_array ent = OBJECT_ARRAY_INIT;
int blobs = 0, paths = 0;
struct blobinfo blob[2];
- int nongit;
+ int nongit = 0, no_index = 0;
int result = 0;
/*
@@ -285,14 +288,59 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
* Other cases are errors.
*/
- prefix = setup_git_directory_gently(&nongit);
- gitmodules_config();
+ /* Were we asked to do --no-index explicitly? */
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "--")) {
+ i++;
+ break;
+ }
+ if (!strcmp(argv[i], "--no-index"))
+ no_index = DIFF_NO_INDEX_EXPLICIT;
+ if (argv[i][0] != '-')
+ break;
+ }
+
+ if (!no_index)
+ prefix = setup_git_directory_gently(&nongit);
+
+ /*
+ * Treat git diff with at least one path outside of the
+ * repo the same as if the command would have been executed
+ * outside of a git repository. In this case it behaves
+ * the same way as "git diff --no-index <a> <b>", which acts
+ * as a colourful "diff" replacement.
+ */
+ if (nongit || ((argc == i + 2) &&
+ (!path_inside_repo(prefix, argv[i]) ||
+ !path_inside_repo(prefix, argv[i + 1]))))
+ no_index = DIFF_NO_INDEX_IMPLICIT;
+
+ if (!no_index)
+ gitmodules_config();
git_config(git_diff_ui_config, NULL);
init_revisions(&rev, prefix);
- /* If this is a no-index diff, just run it and exit there. */
- diff_no_index(&rev, argc, argv, nongit, prefix);
+ if (no_index && argc != i + 2) {
+ if (no_index == DIFF_NO_INDEX_IMPLICIT) {
+ /*
+ * There was no --no-index and there were not two
+ * paths. It is possible that the user intended
+ * to do an inside-repository operation.
+ */
+ fprintf(stderr, "Not a git repository\n");
+ fprintf(stderr,
+ "To compare two paths outside a working tree:\n");
+ }
+ /* Give the usage message for non-repository usage and exit. */
+ usagef("git diff %s <path> <path>",
+ no_index == DIFF_NO_INDEX_EXPLICIT ?
+ "--no-index" : "[--no-index]");
+
+ }
+ if (no_index)
+ /* If this is a no-index diff, just run it and exit there. */
+ diff_no_index(&rev, argc, argv, prefix);
/* Otherwise, we are doing the usual "git" diff */
rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;