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Merge branch 'jh/fast-import-notes' into maint

* jh/fast-import-notes:
  fast-import: Fix incorrect fanout level when modifying existing notes refs
  t9301: Add 2nd testcase exposing bugs in fast-import's notes fanout handling
  t9301: Fix testcase covering up a bug in fast-import's notes fanout handling
This commit is contained in:
Junio C Hamano 2011-12-28 11:32:35 -08:00
commit 9ddb7ead52
2 changed files with 83 additions and 8 deletions

View file

@ -2173,6 +2173,11 @@ static uintmax_t do_change_note_fanout(
if (tmp_hex_sha1_len == 40 && !get_sha1_hex(hex_sha1, sha1)) {
/* This is a note entry */
if (fanout == 0xff) {
/* Counting mode, no rename */
num_notes++;
continue;
}
construct_path_with_fanout(hex_sha1, fanout, realpath);
if (!strcmp(fullpath, realpath)) {
/* Note entry is in correct location */
@ -2379,7 +2384,7 @@ static void file_change_cr(struct branch *b, int rename)
leaf.tree);
}
static void note_change_n(struct branch *b, unsigned char old_fanout)
static void note_change_n(struct branch *b, unsigned char *old_fanout)
{
const char *p = command_buf.buf + 2;
static struct strbuf uq = STRBUF_INIT;
@ -2390,6 +2395,23 @@ static void note_change_n(struct branch *b, unsigned char old_fanout)
uint16_t inline_data = 0;
unsigned char new_fanout;
/*
* When loading a branch, we don't traverse its tree to count the real
* number of notes (too expensive to do this for all non-note refs).
* This means that recently loaded notes refs might incorrectly have
* b->num_notes == 0, and consequently, old_fanout might be wrong.
*
* Fix this by traversing the tree and counting the number of notes
* when b->num_notes == 0. If the notes tree is truly empty, the
* calculation should not take long.
*/
if (b->num_notes == 0 && *old_fanout == 0) {
/* Invoke change_note_fanout() in "counting mode". */
b->num_notes = change_note_fanout(&b->branch_tree, 0xff);
*old_fanout = convert_num_notes_to_fanout(b->num_notes);
}
/* Now parse the notemodify command. */
/* <dataref> or 'inline' */
if (*p == ':') {
char *x;
@ -2450,7 +2472,7 @@ static void note_change_n(struct branch *b, unsigned char old_fanout)
typename(type), command_buf.buf);
}
construct_path_with_fanout(sha1_to_hex(commit_sha1), old_fanout, path);
construct_path_with_fanout(sha1_to_hex(commit_sha1), *old_fanout, path);
if (tree_content_remove(&b->branch_tree, path, NULL))
b->num_notes--;
@ -2637,7 +2659,7 @@ static void parse_new_commit(void)
else if (!prefixcmp(command_buf.buf, "C "))
file_change_cr(b, 0);
else if (!prefixcmp(command_buf.buf, "N "))
note_change_n(b, prev_fanout);
note_change_n(b, &prev_fanout);
else if (!strcmp("deleteall", command_buf.buf))
file_change_deleteall(b);
else if (!prefixcmp(command_buf.buf, "ls "))

View file

@ -505,9 +505,63 @@ test_expect_success 'verify that non-notes are untouched by a fanout change' '
test_cmp expect_non-note3 actual
'
# Change the notes for the three top commits
test_tick
cat >input <<INPUT_END
commit refs/notes/many_notes
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
changing notes for the top three commits
COMMIT
from refs/notes/many_notes^0
INPUT_END
rm expect
i=$num_commits
j=0
while test $j -lt 3
do
cat >>input <<INPUT_END
N inline refs/heads/many_commits~$j
data <<EOF
changed note for commit #$i
EOF
INPUT_END
cat >>expect <<EXPECT_END
commit #$i
changed note for commit #$i
EXPECT_END
i=$(($i - 1))
j=$(($j + 1))
done
test_expect_success 'change a few existing notes' '
git fast-import <input &&
GIT_NOTES_REF=refs/notes/many_notes git log -n3 refs/heads/many_commits |
grep "^ " > actual &&
test_cmp expect actual
'
test_expect_success 'verify that changing notes respect existing fanout' '
# None of the entries in the top-level notes tree should be a full SHA1
git ls-tree --name-only refs/notes/many_notes |
while read path
do
if test $(expr length "$path") -ge 40
then
return 1
fi
done
'
remaining_notes=10
test_tick
cat >>input <<INPUT_END
cat >input <<INPUT_END
commit refs/notes/many_notes
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
@ -516,12 +570,11 @@ COMMIT
from refs/notes/many_notes^0
INPUT_END
i=$remaining_notes
while test $i -lt $num_commits
i=$(($num_commits - $remaining_notes))
for sha1 in $(git rev-list -n $i refs/heads/many_commits)
do
i=$(($i + 1))
cat >>input <<INPUT_END
N 0000000000000000000000000000000000000000 :$i
N 0000000000000000000000000000000000000000 $sha1
INPUT_END
done