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commit-graph.c: extract verify_one_commit_graph()

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When the `verify_commit_graph()` function was extended to support
commit-graph chains via 3da4b609bb1 (commit-graph: verify chains with
--shallow mode, 2019-06-18), it did so by recursively calling itself on
each layer of the commit-graph chain.

In practice this poses no issues, since commit-graph chains do not loop,
and there are few enough of them that adding additional frames to the
stack is not a problem.

A future commit will consolidate the progress output from `git
commit-graph verify` when verifying chained commit-graphs to print a
single line instead of one progress meter per commit-graph layer.
Prepare for this by extracting a routine to verify a single layer of a
commit-graph.

Note that `verify_commit_graph()` is still recursive after this patch,
but this will change in the subsequent patch.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau 2023-07-07 20:31:36 -04:00 committed by Junio C Hamano
parent 39bdd30377
commit eb319d6771
1 changed files with 16 additions and 8 deletions
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24
commit-graph.c
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@ -2543,18 +2543,14 @@ static int commit_graph_checksum_valid(struct commit_graph *g)
return hashfile_checksum_valid(g->data, g->data_len);
}
int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags)
static int verify_one_commit_graph(struct repository *r,
struct commit_graph *g,
int flags)
{
uint32_t i, cur_fanout_pos = 0;
struct object_id prev_oid, cur_oid;
int generation_zero = 0;
struct progress *progress = NULL;
int local_error = 0;
if (!g) {
graph_report("no commit-graph file loaded");
return 1;
}
verify_commit_graph_error = verify_commit_graph_lite(g);
if (verify_commit_graph_error)
@ -2700,7 +2696,19 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags)
}
stop_progress(&progress);
local_error = verify_commit_graph_error;
return verify_commit_graph_error;
}
int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags)
{
int local_error = 0;
if (!g) {
graph_report("no commit-graph file loaded");
return 1;
}
local_error = verify_one_commit_graph(r, g, flags);
if (!(flags & COMMIT_GRAPH_VERIFY_SHALLOW) && g->base_graph)
local_error |= verify_commit_graph(r, g->base_graph, flags);