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commit/revisions: bookkeeping before refactoring

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There are a few things that need to move around a little before
making a big refactoring in the topo-order logic:

1. We need access to record_author_date() and
   compare_commits_by_author_date() in revision.c. These are used
   currently by sort_in_topological_order() in commit.c.

2. Moving these methods to commit.h requires adding an author_date_slab
   declaration to commit.h. Consumers will need their own implementation.

3. The add_parents_to_list() method in revision.c performs logic
   around the UNINTERESTING flag and other special cases depending
   on the struct rev_info. Allow this method to ignore a NULL 'list'
   parameter, as we will not be populating the list for our walk.
   Also rename the method to the slightly more generic name
   process_parents() to make clear that this method does more than
   add to a list (and no list is required anymore).

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2018-11-01 13:46:21 +00:00
committed by Junio C Hamano
parent f0d9cc4196
commit 5284fc5cc9
3 changed files with 21 additions and 13 deletions
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9
commit.c
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@ -655,11 +655,10 @@ 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, timestamp_t);
static void record_author_date(struct author_date_slab *author_date,
struct commit *commit)
void record_author_date(struct author_date_slab *author_date,
struct commit *commit)
{
const char *buffer = get_commit_buffer(commit, NULL);
struct ident_split ident;
@ -684,8 +683,8 @@ fail_exit:
unuse_commit_buffer(commit, buffer);
}
static int compare_commits_by_author_date(const void *a_, const void *b_,
void *cb_data)
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;