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 commit-queue to sort
them.
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
Documentation/rev-list-options.txt | 4 +++
commit.c | 59 ++++++++++++++++++++++++++++++++++++++
commit.h | 3 +-
revision.c | 3 ++
4 files changed, 68 insertions(+), 1 deletion(-)
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 3bdbf5e..8302402 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -617,6 +617,10 @@ By default, the commits are shown in reverse chronological order.
Show no parents before all of its children are shown, but
otherwise show commits in the commit timestamp order.
+--author-date-order::
+ Show no parents before all of its children are shown, but
+ otherwise show commits in the author timestamp order.
+
--topo-order::
Show no parents before all of its children are shown, and
avoid showing commits on multiple lines of history
diff --git a/commit.c b/commit.c
index cc6d385..f3a2f09 100644
--- a/commit.c
+++ b/commit.c
@@ -510,6 +510,53 @@ 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;
+ struct ident_split ident;
+ char *date_end;
+ unsigned long date;
+
+ for (buf = commit->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)
+ return; /* malformed "author" line */
+ break;
+ }
+
+ date = strtoul(ident.date_begin, &date_end, 10);
+ if (date_end != ident.date_end)
+ return; /* malformed date */
+ *(author_date_slab_at(author_date, commit)) = date;
+}
+
+static int compare_commits_by_author_date(struct commit *a, struct commit *b,
+ void *cb_data)
+{
+ 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(struct commit *a, struct commit *b, void *unused)
{
/* newer commits with larger date first */
@@ -530,6 +577,7 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
struct indegree_slab indegree;
struct commit_queue queue;
struct commit *commit;
+ struct author_date_slab author_date;
if (!orig)
return;
@@ -537,6 +585,7 @@ 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;
@@ -544,12 +593,20 @@ 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 */
@@ -620,6 +677,8 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
clear_indegree_slab(&indegree);
clear_commit_queue(&queue);
+ if (sort_order == REV_SORT_BY_AUTHOR_DATE)
+ clear_author_date_slab(&author_date);
}
/* merge-base stuff */
diff --git a/commit.h b/commit.h
index 247e474..e43dfd0 100644
--- a/commit.h
+++ b/commit.h
@@ -142,7 +142,8 @@ void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark);
enum rev_sort_order {
REV_SORT_IN_GRAPH_ORDER = 0,
- REV_SORT_BY_COMMIT_DATE
+ REV_SORT_BY_COMMIT_DATE,
+ REV_SORT_BY_AUTHOR_DATE
};
/*
diff --git a/revision.c b/revision.c
index 966ebbc..12d9b64 100644
--- a/revision.c
+++ b/revision.c
@@ -1393,6 +1393,9 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
} else if (!strcmp(arg, "--date-order")) {
revs->sort_order = REV_SORT_BY_COMMIT_DATE;
revs->topo_order = 1;
+ } else if (!strcmp(arg, "--author-date-order")) {
+ revs->sort_order = REV_SORT_BY_AUTHOR_DATE;
+ revs->topo_order = 1;
} else if (!prefixcmp(arg, "--early-output")) {
int count = 100;
switch (arg[14]) {
--
1.8.3-451-gb703ddf
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