[PATCH v4 09/11] commit-graph: extract count_distinct_commits()

[Derrick Stolee via GitGitGadget]

From: Derrick Stolee <dsto...@microsoft.com>

The write_commit_graph() method is too complex, so we are
extracting methods one by one.

Extract count_distinct_commits(), which sorts the oids list, then
iterates through to find duplicates.

Signed-off-by: Derrick Stolee <dsto...@microsoft.com>
---
 commit-graph.c | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)

diff --git a/commit-graph.c b/commit-graph.c
index 730d529815..f7419c919b 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -963,6 +963,27 @@ static void fill_oids_from_all_packs(struct 
write_commit_graph_context *ctx)
        stop_progress(&ctx->progress);
 }
 
+static uint32_t count_distinct_commits(struct write_commit_graph_context *ctx)
+{
+       uint32_t i, count_distinct = 1;
+
+       if (ctx->report_progress)
+               ctx->progress = start_delayed_progress(
+                       _("Counting distinct commits in commit graph"),
+                       ctx->oids.nr);
+       display_progress(ctx->progress, 0); /* TODO: Measure QSORT() progress */
+       QSORT(ctx->oids.list, ctx->oids.nr, commit_compare);
+
+       for (i = 1; i < ctx->oids.nr; i++) {
+               display_progress(ctx->progress, i + 1);
+               if (!oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i]))
+                       count_distinct++;
+       }
+       stop_progress(&ctx->progress);
+
+       return count_distinct;
+}
+
 int write_commit_graph(const char *obj_dir,
                       struct string_list *pack_indexes,
                       struct string_list *commit_hex,
@@ -1024,19 +1045,7 @@ int write_commit_graph(const char *obj_dir,
 
        close_reachable(ctx);
 
-       if (ctx->report_progress)
-               ctx->progress = start_delayed_progress(
-                       _("Counting distinct commits in commit graph"),
-                       ctx->oids.nr);
-       display_progress(ctx->progress, 0); /* TODO: Measure QSORT() progress */
-       QSORT(ctx->oids.list, ctx->oids.nr, commit_compare);
-       count_distinct = 1;
-       for (i = 1; i < ctx->oids.nr; i++) {
-               display_progress(ctx->progress, i + 1);
-               if (!oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i]))
-                       count_distinct++;
-       }
-       stop_progress(&ctx->progress);
+       count_distinct = count_distinct_commits(ctx);
 
        if (count_distinct >= GRAPH_EDGE_LAST_MASK) {
                error(_("the commit graph format cannot write %d commits"), 
count_distinct);
-- 
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