diff options
Diffstat (limited to 'builtin/diff.c')
| -rw-r--r-- | builtin/diff.c | 75 |
1 files changed, 60 insertions, 15 deletions
diff --git a/builtin/diff.c b/builtin/diff.c index adb93a9efa..0f247d2400 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; @@ -64,15 +67,18 @@ static void stuff_change(struct diff_options *opt, static int builtin_diff_b_f(struct rev_info *revs, int argc, const char **argv, - struct blobinfo *blob, - const char *path) + struct blobinfo *blob) { /* Blob vs file in the working tree*/ struct stat st; + const char *path; if (argc > 1) usage(builtin_diff_usage); + GUARD_PATHSPEC(&revs->prune_data, PATHSPEC_FROMTOP | PATHSPEC_LITERAL); + path = revs->prune_data.items[0].match; + if (lstat(path, &st)) die_errno(_("failed to stat '%s'"), path); if (!(S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) @@ -255,9 +261,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix) struct rev_info rev; struct object_array ent = OBJECT_ARRAY_INIT; int blobs = 0, paths = 0; - const char *path = NULL; struct blobinfo blob[2]; - int nongit; + int nongit = 0, no_index = 0; int result = 0; /* @@ -283,14 +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; @@ -366,13 +416,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix) die(_("unhandled object '%s' given."), name); } } - if (rev.prune_data.nr) { - /* builtin_diff_b_f() */ - GUARD_PATHSPEC(&rev.prune_data, PATHSPEC_FROMTOP | PATHSPEC_LITERAL); - if (!path) - path = rev.prune_data.items[0].match; + if (rev.prune_data.nr) paths += rev.prune_data.nr; - } /* * Now, do the arguments look reasonable? @@ -385,7 +430,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix) case 1: if (paths != 1) usage(builtin_diff_usage); - result = builtin_diff_b_f(&rev, argc, argv, blob, path); + result = builtin_diff_b_f(&rev, argc, argv, blob); break; case 2: if (paths) |