Until M 040000 <tree> "" syntax was introduced in commit 2794ad5
(fast-import: Allow filemodify to set the root, 2010-10-10), it
was impossible for the root entry to refer to an unloaded tree.
Update various functions to take that possibility into account.
Otherwise
M 040000 <tree> ""
M 100644 :1 "foo"
and similar commands (using D, C, or R after resetting the root
tree) segfault.
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
---
fast-import.c | 20 ++++++++++++++++----
t/t9300-fast-import.sh | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 4 deletions(-)
diff --git a/fast-import.c b/fast-import.c
index 8f68a89..aaf47c5 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1444,7 +1444,7 @@ static int tree_content_set(
const uint16_t mode,
struct tree_content *subtree)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
const char *slash1;
unsigned int i, n;
struct tree_entry *e;
@@ -1468,6 +1468,9 @@ static int tree_content_set(
if (!slash1 && !S_ISDIR(mode) && subtree)
die("Non-directories cannot have subtrees");
+ if (!root->tree)
+ load_tree(root);
+ t = root->tree;
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
@@ -1523,7 +1526,7 @@ static int tree_content_remove(
const char *p,
struct tree_entry *backup_leaf)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
const char *slash1;
unsigned int i, n;
struct tree_entry *e;
@@ -1534,6 +1537,9 @@ static int tree_content_remove(
else
n = strlen(p);
+ if (!root->tree)
+ load_tree(root);
+ t = root->tree;
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
@@ -1581,7 +1587,7 @@ static int tree_content_get(
const char *p,
struct tree_entry *leaf)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
const char *slash1;
unsigned int i, n;
struct tree_entry *e;
@@ -1592,6 +1598,9 @@ static int tree_content_get(
else
n = strlen(p);
+ if (!root->tree)
+ load_tree(root);
+ t = root->tree;
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
@@ -2056,13 +2065,16 @@ static uintmax_t do_change_note_fanout(
char *fullpath, unsigned int fullpath_len,
unsigned char fanout)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
struct tree_entry *e, leaf;
unsigned int i, tmp_hex_sha1_len, tmp_fullpath_len;
uintmax_t num_notes = 0;
unsigned char sha1[20];
char realpath[60];
+ if (!root->tree);
+ load_tree(root);
+ t = root->tree;
for (i = 0; t && i < t->entry_count; i++) {
e = t->entries[i];
tmp_hex_sha1_len = hex_sha1_len + e->name->str_len;
diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 3c0cf05..de95a6e 100755
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -928,6 +928,43 @@ test_expect_success \
git diff-tree -C --find-copies-harder -r N5^^ N5 >actual &&
compare_diff_raw expect actual'
+test_expect_success \
+ 'N: copy to root by id and modify' \
+ 'echo "hello, world" >expect.foo &&
+ echo hello >expect.bar &&
+ git fast-import <<-SETUP_END &&
+ commit refs/heads/N7
+ committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+ data <<COMMIT
+ hello, tree
+ COMMIT
+
+ deleteall
+ M 644 inline foo/bar
+ data <<EOF
+ hello
+ EOF
+ SETUP_END
+
+ tree=$(git rev-parse --verify N7:) &&
+ git fast-import <<-INPUT_END &&
+ commit refs/heads/N8
+ committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+ data <<COMMIT
+ copy to root by id and modify
+ COMMIT
+
+ M 040000 $tree ""
+ M 644 inline foo/foo
+ data <<EOF
+ hello, world
+ EOF
+ INPUT_END
+ git show N8:foo/foo >actual.foo &&
+ git show N8:foo/bar >actual.bar &&
+ test_cmp expect.foo actual.foo &&
+ test_cmp expect.bar actual.bar'
+
###
### series O
###
--
1.7.2.3
--
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