From 75f3ff2eeaba820b37016f464b6d1078cb6260e2 Mon Sep 17 00:00:00 2001 From: Stephan Beyer Date: Tue, 10 Feb 2009 15:30:35 +0100 Subject: [PATCH] Generalize and libify index_is_dirty() to index_differs_from(...) index_is_dirty() in builtin-revert.c checks if the index is dirty. This patch generalizes this function to check if the index differs from a revision, i.e. the former index_is_dirty() behavior can now be achieved by index_differs_from("HEAD", 0). The second argument "diff_flags" allows to set further diff option flags like DIFF_OPT_IGNORE_SUBMODULES. See DIFF_OPT_* macros in diff.h for a list. index_differs_from() seems to be useful for more than builtin-revert.c, so it is moved into diff-lib.c and also used in builtin-commit.c. Yet to mention: - "rev.abbrev = 0;" can be safely removed. This has no impact on performance or functioning of neither setup_revisions() nor run_diff_index(). - rev.pending.objects is free()d because this fixes a leak. (Also see 295dd2ad "Fix memory leak in traverse_commit_list") Mentored-by: Daniel Barkalow Mentored-by: Christian Couder Signed-off-by: Stephan Beyer Signed-off-by: Junio C Hamano --- builtin-commit.c | 13 ++----------- builtin-revert.c | 13 +------------ diff-lib.c | 15 +++++++++++++++ diff.h | 2 ++ 4 files changed, 20 insertions(+), 23 deletions(-) diff --git a/builtin-commit.c b/builtin-commit.c index d6a3a6203..46e649cd7 100644 --- a/builtin-commit.c +++ b/builtin-commit.c @@ -561,7 +561,6 @@ static int prepare_to_commit(const char *index_file, const char *prefix) commitable = run_status(fp, index_file, prefix, 1); wt_status_use_color = saved_color_setting; } else { - struct rev_info rev; unsigned char sha1[20]; const char *parent = "HEAD"; @@ -573,16 +572,8 @@ static int prepare_to_commit(const char *index_file, const char *prefix) if (get_sha1(parent, sha1)) commitable = !!active_nr; - else { - init_revisions(&rev, ""); - rev.abbrev = 0; - setup_revisions(0, NULL, &rev, parent); - DIFF_OPT_SET(&rev.diffopt, QUIET); - DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS); - run_diff_index(&rev, 1 /* cached */); - - commitable = !!DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES); - } + else + commitable = index_differs_from(parent, 0); } fclose(fp); diff --git a/builtin-revert.c b/builtin-revert.c index d48313c74..d21015067 100644 --- a/builtin-revert.c +++ b/builtin-revert.c @@ -223,17 +223,6 @@ static char *help_msg(const unsigned char *sha1) return helpbuf; } -static int index_is_dirty(void) -{ - struct rev_info rev; - init_revisions(&rev, NULL); - setup_revisions(0, NULL, &rev, "HEAD"); - DIFF_OPT_SET(&rev.diffopt, QUIET); - DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS); - run_diff_index(&rev, 1); - return !!DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES); -} - static struct tree *empty_tree(void) { struct tree *tree = xcalloc(1, sizeof(struct tree)); @@ -279,7 +268,7 @@ static int revert_or_cherry_pick(int argc, const char **argv) } else { if (get_sha1("HEAD", head)) die ("You do not have a valid HEAD"); - if (index_is_dirty()) + if (index_differs_from("HEAD", 0)) die ("Dirty index: cannot %s", me); } discard_cache(); diff --git a/diff-lib.c b/diff-lib.c index a41e1ec07..79d060683 100644 --- a/diff-lib.c +++ b/diff-lib.c @@ -513,3 +513,18 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt) exit(128); return 0; } + +int index_differs_from(const char *def, int diff_flags) +{ + struct rev_info rev; + + init_revisions(&rev, NULL); + setup_revisions(0, NULL, &rev, def); + DIFF_OPT_SET(&rev.diffopt, QUIET); + DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS); + rev.diffopt.flags |= diff_flags; + run_diff_index(&rev, 1); + if (rev.pending.alloc) + free(rev.pending.objects); + return (DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES) != 0); +} diff --git a/diff.h b/diff.h index 23cd90c2e..6703a4fb4 100644 --- a/diff.h +++ b/diff.h @@ -265,4 +265,6 @@ extern int diff_result_code(struct diff_options *, int); extern void diff_no_index(struct rev_info *, int, const char **, int, const char *); +extern int index_differs_from(const char *def, int diff_flags); + #endif /* DIFF_H */ -- 2.26.2