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authorDerrick Stolee <dstolee@microsoft.com>2018-06-27 13:24:43 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-06-27 17:29:10 (GMT)
commite0fd51e1d7d3877d4b0b4133c763d46b65d46f7a (patch)
treef804641d825b6c1a4573c50ed27cf113b7441a87
parent41df0e307fede8ad01799322af41d8b59d2f6edf (diff)
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fsck: verify commit-graph
If core.commitGraph is true, verify the contents of the commit-graph during 'git fsck' using the 'git commit-graph verify' subcommand. Run this check on all alternates, as well. We use a new process for two reasons: 1. The subcommand decouples the details of loading and verifying a commit-graph file from the other fsck details. 2. The commit-graph verification requires the commits to be loaded in a specific order to guarantee we parse from the commit-graph file for some objects and from the object database for others. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-fsck.txt3
-rw-r--r--builtin/fsck.c21
-rwxr-xr-xt/t5318-commit-graph.sh8
3 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/git-fsck.txt b/Documentation/git-fsck.txt
index b9f060e..ab9a93f 100644
--- a/Documentation/git-fsck.txt
+++ b/Documentation/git-fsck.txt
@@ -110,6 +110,9 @@ Any corrupt objects you will have to find in backups or other archives
(i.e., you can just remove them and do an 'rsync' with some other site in
the hopes that somebody else has the object you have corrupted).
+If core.commitGraph is true, the commit-graph file will also be inspected
+using 'git commit-graph verify'. See linkgit:git-commit-graph[1].
+
Extracted Diagnostics
---------------------
diff --git a/builtin/fsck.c b/builtin/fsck.c
index 3ad4f16..eca7900 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -18,6 +18,7 @@
#include "decorate.h"
#include "packfile.h"
#include "object-store.h"
+#include "run-command.h"
#define REACHABLE 0x0001
#define SEEN 0x0002
@@ -47,6 +48,7 @@ static int name_objects;
#define ERROR_REACHABLE 02
#define ERROR_PACK 04
#define ERROR_REFS 010
+#define ERROR_COMMIT_GRAPH 020
static const char *describe_object(struct object *obj)
{
@@ -822,5 +824,24 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
}
check_connectivity();
+
+ if (core_commit_graph) {
+ struct child_process commit_graph_verify = CHILD_PROCESS_INIT;
+ const char *verify_argv[] = { "commit-graph", "verify", NULL, NULL, NULL };
+
+ commit_graph_verify.argv = verify_argv;
+ commit_graph_verify.git_cmd = 1;
+ if (run_command(&commit_graph_verify))
+ errors_found |= ERROR_COMMIT_GRAPH;
+
+ prepare_alt_odb(the_repository);
+ for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
+ verify_argv[2] = "--object-dir";
+ verify_argv[3] = alt->path;
+ if (run_command(&commit_graph_verify))
+ errors_found |= ERROR_COMMIT_GRAPH;
+ }
+ }
+
return errors_found;
}
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index fed05e2..a9e8c77 100755
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -399,4 +399,12 @@ test_expect_success 'detect invalid checksum hash' '
"incorrect checksum"
'
+test_expect_success 'git fsck (checks commit-graph)' '
+ cd "$TRASH_DIRECTORY/full" &&
+ git fsck &&
+ corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
+ "incorrect checksum" &&
+ test_must_fail git fsck
+'
+
test_done