During a run of 'git commit-graph check', list the issues with the
header information in the commit-graph file. Some of this information
is inferred from the loaded 'struct commit_graph'.
Signed-off-by: Derrick Stolee <dsto...@microsoft.com>
---
commit-graph.c | 29 ++++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)
diff --git a/commit-graph.c b/commit-graph.c
index cd0634bba0..c5e5a0f860 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -820,7 +820,34 @@ void write_commit_graph(const char *obj_dir,
oids.nr = 0;
}
+static int check_commit_graph_error;
+#define graph_report(...) { check_commit_graph_error = 1; printf(__VA_ARGS__);
}
+
int check_commit_graph(struct commit_graph *g)
{
- return !g;
+ if (!g) {
+ graph_report(_("no commit-graph file loaded"));
+ return 1;
+ }
+
+ check_commit_graph_error = 0;
+
+ if (get_be32(g->data) != GRAPH_SIGNATURE)
+ graph_report(_("commit-graph file has incorrect header"));
+
+ if (*(g->data + 4) != 1)
+ graph_report(_("commit-graph file version is not 1"));
+ if (*(g->data + 5) != GRAPH_OID_VERSION)
+ graph_report(_("commit-graph OID version is not 1 (SHA1)"));
+
+ if (!g->chunk_oid_fanout)
+ graph_report(_("commit-graph is missing the OID Fanout chunk"));
+ if (!g->chunk_oid_lookup)
+ graph_report(_("commit-graph is missing the OID Lookup chunk"));
+ if (!g->chunk_commit_data)
+ graph_report(_("commit-graph is missing the Commit Data
chunk"));
+ if (g->hash_len != GRAPH_OID_LEN)
+ graph_report(_("commit-graph has incorrect hash length: %d"),
g->hash_len);
+
+ return check_commit_graph_error;
}
--
2.17.0.39.g685157f7fb
