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| author |  Derrick Stolee <dstolee@microsoft.com> | 2018-06-27 09:24:42 -0400 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2018-06-27 10:29:10 -0700 |
| commit | 41df0e307fede8ad01799322af41d8b59d2f6edf (patch) | |
| tree | a512e999d6f91bf2800bf44e7468a22f37defac3 /t | |
| parent | commit-graph: test for corrupted octopus edge (diff) | |
| download | tgif-41df0e307fede8ad01799322af41d8b59d2f6edf.tar.xz | |
commit-graph: verify contents match checksum
The commit-graph file ends with a SHA1 hash of the previous contents. If
a commit-graph file has errors but the checksum hash is correct, then we
know that the problem is a bug in Git and not simply file corruption
after-the-fact.
Compute the checksum right away so it is the first error that appears,
and make the message translatable since this error can be "corrected" by
a user by simply deleting the file and recomputing. The rest of the
errors are useful only to developers.
Be sure to continue checking the rest of the file data if the checksum
is wrong. This is important for our tests, as we break the checksum as
we modify bytes of the commit-graph file.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't')
| -rwxr-xr-x | t/t5318-commit-graph.sh | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh index a0cf1f66de..fed05e2f12 100755 --- a/t/t5318-commit-graph.sh +++ b/t/t5318-commit-graph.sh @@ -279,6 +279,7 @@ GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16)) GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \ $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS)) GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4)) +GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES)) # usage: corrupt_graph_and_verify <position> <data> <string> # Manipulates the commit-graph file at the position @@ -393,4 +394,9 @@ test_expect_success 'detect incorrect parent for octopus merge' ' "invalid parent" ' +test_expect_success 'detect invalid checksum hash' ' + corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \ + "incorrect checksum" +' + test_done |