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authorJeff King <peff@peff.net>2016-09-27 20:59:50 (GMT)
committerJunio C Hamano <gitster@pobox.com>2016-09-27 21:08:30 (GMT)
commit2edffef2337eae691a454a072e0f9b9538725317 (patch)
treeca5acc195c62c4983c01e1049637fc3b08f3e85c
parent6fe1b1407ed91823daa5d487abe457ff37463349 (diff)
downloadgit-2edffef2337eae691a454a072e0f9b9538725317.zip
git-2edffef2337eae691a454a072e0f9b9538725317.tar.gz
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tree-walk: be more specific about corrupt tree errors
When the tree-walker runs into an error, it just calls die(), and the message is always "corrupt tree file". However, we are actually covering several cases here; let's give the user a hint about what happened. Let's also avoid using the word "corrupt", which makes it seem like the data bit-rotted on disk. Our sha1 check would already have found that. These errors are ones of data that is malformed in the first place. Signed-off-by: David Turner <dturner@twosigma.com> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rwxr-xr-xt/t1007-hash-object.sh25
-rw-r--r--tree-walk.c12
2 files changed, 30 insertions, 7 deletions
diff --git a/t/t1007-hash-object.sh b/t/t1007-hash-object.sh
index acca9ac..c5245c5 100755
--- a/t/t1007-hash-object.sh
+++ b/t/t1007-hash-object.sh
@@ -183,9 +183,30 @@ for args in "-w --stdin-paths" "--stdin-paths -w"; do
pop_repo
done
-test_expect_success 'corrupt tree' '
+test_expect_success 'too-short tree' '
echo abc >malformed-tree &&
- test_must_fail git hash-object -t tree malformed-tree
+ test_must_fail git hash-object -t tree malformed-tree 2>err &&
+ test_i18ngrep "too-short tree object" err
+'
+
+hex2oct() {
+ perl -ne 'printf "\\%03o", hex for /../g'
+}
+
+test_expect_success 'malformed mode in tree' '
+ hex_sha1=$(echo foo | git hash-object --stdin -w) &&
+ bin_sha1=$(echo $hex_sha1 | hex2oct) &&
+ printf "9100644 \0$bin_sha1" >tree-with-malformed-mode &&
+ test_must_fail git hash-object -t tree tree-with-malformed-mode 2>err &&
+ test_i18ngrep "malformed mode in tree entry" err
+'
+
+test_expect_success 'empty filename in tree' '
+ hex_sha1=$(echo foo | git hash-object --stdin -w) &&
+ bin_sha1=$(echo $hex_sha1 | hex2oct) &&
+ printf "100644 \0$bin_sha1" >tree-with-empty-filename &&
+ test_must_fail git hash-object -t tree tree-with-empty-filename 2>err &&
+ test_i18ngrep "empty filename in tree entry" err
'
test_expect_success 'corrupt commit' '
diff --git a/tree-walk.c b/tree-walk.c
index ce27842..24f9a0f 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -27,12 +27,14 @@ static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned
const char *path;
unsigned int mode, len;
- if (size < 24 || buf[size - 21])
- die("corrupt tree file");
+ if (size < 23 || buf[size - 21])
+ die(_("too-short tree object"));
path = get_mode(buf, &mode);
- if (!path || !*path)
- die("corrupt tree file");
+ if (!path)
+ die(_("malformed mode in tree entry for tree"));
+ if (!*path)
+ die(_("empty filename in tree entry for tree"));
len = strlen(path) + 1;
/* Initialize the descriptor entry */
@@ -81,7 +83,7 @@ void update_tree_entry(struct tree_desc *desc)
unsigned long len = end - (const unsigned char *)buf;
if (size < len)
- die("corrupt tree file");
+ die(_("too-short tree file"));
buf = end;
size -= len;
desc->buffer = buf;