Jeff King wrote:
> We do not have many tests for handling corrupt objects. This
> new test at least checks that we detect a byte error in a
> corrupt blob object while streaming it out with cat-file.
Thanks.
[...]
> +# convert "1234abcd" to ".git/objects/12/34abcd"
> +obj_to_file() {
> + echo "$(git rev-parse --git-dir)/objects/$(git rev-parse "$1" | sed
> 's,..,&/,')"
> +}
Maybe this would be clearer in multiple lines?
commit=$(git rev-parse --verify "$1") &&
git_dir=$(git rev-parse --git-dir) &&
tail=${commit#??} &&
echo "$git_dir/objects/${commit%$tail}/$tail"
> +
> +# Convert byte at offset "$2" of object "$1" into '\0'
> +corrupt_byte() {
> + obj_file=$(obj_to_file "$1") &&
> + chmod +w "$obj_file" &&
> + printf '\0' | dd of="$obj_file" bs=1 seek="$2"
Some other tests such as t4205 also rely on "printf" being
binary-safe. Phew.
> +}
> +
> +test_expect_success 'setup corrupt repo' '
> + git init bit-error &&
> + (
> + cd bit-error &&
> + test_commit content &&
> + corrupt_byte HEAD:content.t 10
> + )
> +'
> +
> +test_expect_success 'streaming a corrupt blob fails' '
"fails gracefully", maybe, to be more precise.
With or without the two changes suggested above,
Reviewed-by: Jonathan Nieder <[email protected]>
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