[PATCH v2] Generalize and libify index_is_dirty() to index_differs_from(...)
From: Stephan Beyer <hidden>
Date: 2016-06-15 22:46:08
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 [off-list ref]
Mentored-by: Christian Couder [off-list ref]
Signed-off-by: Stephan Beyer <redacted>
---
Err, this didn't get to the list, did it?
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 d6a3a62..46e649c 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 d48313c..d210150 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 a41e1ec..79d0606 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 23cd90c..6703a4f 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 */
--
1.6.2.rc0.464.g3ec3