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authorJunio C Hamano <gitster@pobox.com>2013-06-07 10:35:54 -0700
committerJunio C Hamano <gitster@pobox.com>2013-06-11 15:15:21 -0700
commit81c6b38b67019eff48e8e5c324bb77f6c796c0b5 (patch)
treedf64e27cad14932b531c7e28a4638c885739ac52 /commit.c
parentda24b1044f7dc85cda52d6423f5a794a7074fbf8 (diff)
downloadgit-81c6b38b67019eff48e8e5c324bb77f6c796c0b5.tar.gz
log: --author-date-order
Sometimes people would want to view the commits in parallel histories in the order of author dates, not committer dates. Teach "topo-order" sort machinery to do so, using a commit-info slab to record the author dates of each commit, and prio-queue to sort them. Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'commit.c')
-rw-r--r--commit.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/commit.c b/commit.c
index 8b84ebf2b7..076c1fa606 100644
--- a/commit.c
+++ b/commit.c
@@ -510,6 +510,68 @@ struct commit *pop_commit(struct commit_list **stack)
/* count number of children that have not been emitted */
define_commit_slab(indegree_slab, int);
+/* record author-date for each commit object */
+define_commit_slab(author_date_slab, unsigned long);
+
+static void record_author_date(struct author_date_slab *author_date,
+ struct commit *commit)
+{
+ const char *buf, *line_end;
+ char *buffer = NULL;
+ struct ident_split ident;
+ char *date_end;
+ unsigned long date;
+
+ if (!commit->buffer) {
+ unsigned long size;
+ enum object_type type;
+ buffer = read_sha1_file(commit->object.sha1, &type, &size);
+ if (!buffer)
+ return;
+ }
+
+ for (buf = commit->buffer ? commit->buffer : buffer;
+ buf;
+ buf = line_end + 1) {
+ line_end = strchrnul(buf, '\n');
+ if (prefixcmp(buf, "author ")) {
+ if (!line_end[0] || line_end[1] == '\n')
+ return; /* end of header */
+ continue;
+ }
+ if (split_ident_line(&ident,
+ buf + strlen("author "),
+ line_end - (buf + strlen("author "))) ||
+ !ident.date_begin || !ident.date_end)
+ goto fail_exit; /* malformed "author" line */
+ break;
+ }
+
+ date = strtoul(ident.date_begin, &date_end, 10);
+ if (date_end != ident.date_end)
+ goto fail_exit; /* malformed date */
+ *(author_date_slab_at(author_date, commit)) = date;
+
+fail_exit:
+ free(buffer);
+}
+
+static int compare_commits_by_author_date(const void *a_, const void *b_,
+ void *cb_data)
+{
+ const struct commit *a = a_, *b = b_;
+ struct author_date_slab *author_date = cb_data;
+ unsigned long a_date = *(author_date_slab_at(author_date, a));
+ unsigned long b_date = *(author_date_slab_at(author_date, b));
+
+ /* newer commits with larger date first */
+ if (a_date < b_date)
+ return 1;
+ else if (a_date > b_date)
+ return -1;
+ return 0;
+}
+
static int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused)
{
const struct commit *a = a_, *b = b_;
@@ -531,6 +593,7 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
struct indegree_slab indegree;
struct prio_queue queue;
struct commit *commit;
+ struct author_date_slab author_date;
if (!orig)
return;
@@ -538,6 +601,7 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
init_indegree_slab(&indegree);
memset(&queue, '\0', sizeof(queue));
+
switch (sort_order) {
default: /* REV_SORT_IN_GRAPH_ORDER */
queue.compare = NULL;
@@ -545,12 +609,20 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
case REV_SORT_BY_COMMIT_DATE:
queue.compare = compare_commits_by_commit_date;
break;
+ case REV_SORT_BY_AUTHOR_DATE:
+ init_author_date_slab(&author_date);
+ queue.compare = compare_commits_by_author_date;
+ queue.cb_data = &author_date;
+ break;
}
/* Mark them and clear the indegree */
for (next = orig; next; next = next->next) {
struct commit *commit = next->item;
*(indegree_slab_at(&indegree, commit)) = 1;
+ /* also record the author dates, if needed */
+ if (sort_order == REV_SORT_BY_AUTHOR_DATE)
+ record_author_date(&author_date, commit);
}
/* update the indegree */
@@ -621,6 +693,8 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
clear_indegree_slab(&indegree);
clear_prio_queue(&queue);
+ if (sort_order == REV_SORT_BY_AUTHOR_DATE)
+ clear_author_date_slab(&author_date);
}
/* merge-base stuff */