diff options
| -rw-r--r-- | builtin/diff.c | 58 | ||||
| -rw-r--r-- | diff-no-index.c | 44 | ||||
| -rw-r--r-- | diff.h | 2 | ||||
| -rwxr-xr-x | t/perf/p4001-diff-no-index.sh | 22 | ||||
| -rwxr-xr-x | t/t4053-diff-no-index.sh | 26 |
5 files changed, 103 insertions, 49 deletions
diff --git a/builtin/diff.c b/builtin/diff.c index fe0cc7f1b5..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; @@ -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; diff --git a/diff-no-index.c b/diff-no-index.c index 00a8eefde9..33e5982a1c 100644 --- a/diff-no-index.c +++ b/diff-no-index.c @@ -183,54 +183,12 @@ static int queue_diff(struct diff_options *o, void diff_no_index(struct rev_info *revs, int argc, const char **argv, - int nongit, const char *prefix) + const char *prefix) { int i, prefixlen; - int no_index = 0; unsigned deprecated_show_diff_q_option_used = 0; const char *paths[2]; - /* 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 = 1; - if (argv[i][0] != '-') - break; - } - - if (!no_index && !nongit) { - /* - * Inside a git repository, without --no-index. Only - * when a path outside the repository is given, - * e.g. "git diff /var/tmp/[12]", or "git diff - * Makefile /var/tmp/Makefile", allow it to be used as - * a colourful "diff" replacement. - */ - if ((argc != i + 2) || - (path_inside_repo(prefix, argv[i]) && - path_inside_repo(prefix, argv[i+1]))) - return; - } - if (argc != i + 2) { - if (!no_index) { - /* - * 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 ? "--no-index" : "[--no-index]"); - } - diff_setup(&revs->diffopt); for (i = 1; i < argc - 2; ) { int j; @@ -332,7 +332,7 @@ extern int diff_flush_patch_id(struct diff_options *, unsigned char *); extern int diff_result_code(struct diff_options *, int); -extern void diff_no_index(struct rev_info *, int, const char **, int, const char *); +extern void diff_no_index(struct rev_info *, int, const char **, const char *); extern int index_differs_from(const char *def, int diff_flags); diff --git a/t/perf/p4001-diff-no-index.sh b/t/perf/p4001-diff-no-index.sh new file mode 100755 index 0000000000..683be6984f --- /dev/null +++ b/t/perf/p4001-diff-no-index.sh @@ -0,0 +1,22 @@ +#!/bin/sh + +test_description="Test diff --no-index performance" + +. ./perf-lib.sh + +test_perf_large_repo +test_checkout_worktree + +file1=$(git ls-files | tail -n 2 | head -1) +file2=$(git ls-files | tail -n 1 | head -1) + +test_expect_success "empty files, so they take no time to diff" " + echo >$file1 && + echo >$file2 +" + +test_perf "diff --no-index" " + git diff --no-index $file1 $file2 >/dev/null +" + +test_done diff --git a/t/t4053-diff-no-index.sh b/t/t4053-diff-no-index.sh index 979e98398b..2ab3c48734 100755 --- a/t/t4053-diff-no-index.sh +++ b/t/t4053-diff-no-index.sh @@ -29,4 +29,30 @@ test_expect_success 'git diff --no-index relative path outside repo' ' ) ' +test_expect_success 'git diff --no-index with broken index' ' + ( + cd repo && + echo broken >.git/index && + git diff --no-index a ../non/git/a + ) +' + +test_expect_success 'git diff outside repo with broken index' ' + ( + cd repo && + git diff ../non/git/a ../non/git/b + ) +' + +test_expect_success 'git diff --no-index executed outside repo gives correct error message' ' + ( + GIT_CEILING_DIRECTORIES=$TRASH_DIRECTORY/non && + export GIT_CEILING_DIRECTORIES && + cd non/git && + test_must_fail git diff --no-index a 2>actual.err && + echo "usage: git diff --no-index <path> <path>" >expect.err && + test_cmp expect.err actual.err + ) +' + test_done |