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-rw-r--r--unpack-trees.c162
1 files changed, 102 insertions, 60 deletions
diff --git a/unpack-trees.c b/unpack-trees.c
index 89dd279f89..ccfeb6e245 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -5,41 +5,30 @@
#include "cache-tree.h"
#include "unpack-trees.h"
#include "progress.h"
+#include "refs.h"
#define DBRT_DEBUG 1
struct tree_entry_list {
struct tree_entry_list *next;
- unsigned directory : 1;
- unsigned executable : 1;
- unsigned symlink : 1;
unsigned int mode;
const char *name;
const unsigned char *sha1;
};
-static struct tree_entry_list *create_tree_entry_list(struct tree *tree)
+static struct tree_entry_list *create_tree_entry_list(struct tree_desc *desc)
{
- struct tree_desc desc;
struct name_entry one;
struct tree_entry_list *ret = NULL;
struct tree_entry_list **list_p = &ret;
- if (!tree->object.parsed)
- parse_tree(tree);
-
- init_tree_desc(&desc, tree->buffer, tree->size);
-
- while (tree_entry(&desc, &one)) {
+ while (tree_entry(desc, &one)) {
struct tree_entry_list *entry;
entry = xmalloc(sizeof(struct tree_entry_list));
entry->name = one.path;
entry->sha1 = one.sha1;
entry->mode = one.mode;
- entry->directory = S_ISDIR(one.mode) != 0;
- entry->executable = (one.mode & S_IXUSR) != 0;
- entry->symlink = S_ISLNK(one.mode) != 0;
entry->next = NULL;
*list_p = entry;
@@ -69,10 +58,17 @@ static int entcmp(const char *name1, int dir1, const char *name2, int dir2)
return ret;
}
+static inline void remove_entry(int remove)
+{
+ if (remove >= 0)
+ remove_cache_entry_at(remove);
+}
+
static int unpack_trees_rec(struct tree_entry_list **posns, int len,
const char *base, struct unpack_trees_options *o,
struct tree_entry_list *df_conflict_list)
{
+ int remove;
int baselen = strlen(base);
int src_size = len + 1;
int i_stk = i_stk;
@@ -140,9 +136,9 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
#endif
if (!first || entcmp(first, firstdir,
posns[i]->name,
- posns[i]->directory) > 0) {
+ S_ISDIR(posns[i]->mode)) > 0) {
first = posns[i]->name;
- firstdir = posns[i]->directory;
+ firstdir = S_ISDIR(posns[i]->mode);
}
}
/* No name means we're done */
@@ -156,10 +152,11 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
subposns = xcalloc(len, sizeof(struct tree_list_entry *));
+ remove = -1;
if (cache_name && !strcmp(cache_name, first)) {
any_files = 1;
src[0] = active_cache[o->pos];
- remove_cache_entry_at(o->pos);
+ remove = o->pos;
}
for (i = 0; i < len; i++) {
@@ -176,11 +173,13 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
continue;
}
- if (posns[i]->directory) {
+ if (S_ISDIR(posns[i]->mode)) {
struct tree *tree = lookup_tree(posns[i]->sha1);
+ struct tree_desc t;
any_dirs = 1;
parse_tree(tree);
- subposns[i] = create_tree_entry_list(tree);
+ init_tree_desc(&t, tree->buffer, tree->size);
+ subposns[i] = create_tree_entry_list(&t);
posns[i] = posns[i]->next;
src[i + o->merge] = o->df_conflict_entry;
continue;
@@ -223,13 +222,14 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
printf("\n");
}
#endif
- ret = o->fn(src, o);
+ ret = o->fn(src, o, remove);
#if DBRT_DEBUG > 1
printf("Added %d entries\n", ret);
#endif
o->pos += ret;
} else {
+ remove_entry(remove);
for (i = 0; i < src_size; i++) {
if (src[i]) {
add_cache_entry(src[i], ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
@@ -336,12 +336,10 @@ static void check_updates(struct cache_entry **src, int nr,
stop_progress(&progress);;
}
-int unpack_trees(struct object_list *trees, struct unpack_trees_options *o)
+int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o)
{
- unsigned len = object_list_length(trees);
struct tree_entry_list **posns;
int i;
- struct object_list *posn = trees;
struct tree_entry_list df_conflict_list;
static struct cache_entry *dfc;
@@ -361,10 +359,9 @@ int unpack_trees(struct object_list *trees, struct unpack_trees_options *o)
if (len) {
posns = xmalloc(len * sizeof(struct tree_entry_list *));
- for (i = 0; i < len; i++) {
- posns[i] = create_tree_entry_list((struct tree *) posn->item);
- posn = posn->next;
- }
+ for (i = 0; i < len; i++)
+ posns[i] = create_tree_entry_list(t+i);
+
if (unpack_trees_rec(posns, len, o->prefix ? o->prefix : "",
o, &df_conflict_list))
return -1;
@@ -412,6 +409,15 @@ static void verify_uptodate(struct cache_entry *ce,
unsigned changed = ce_match_stat(ce, &st, 1);
if (!changed)
return;
+ /*
+ * NEEDSWORK: the current default policy is to allow
+ * submodule to be out of sync wrt the supermodule
+ * index. This needs to be tightened later for
+ * submodules that are marked to be automatically
+ * checked out.
+ */
+ if (S_ISGITLINK(ntohl(ce->ce_mode)))
+ return;
errno = 0;
}
if (errno == ENOENT)
@@ -425,11 +431,24 @@ static void invalidate_ce_path(struct cache_entry *ce)
cache_tree_invalidate_path(active_cache_tree, ce->name);
}
-static int verify_clean_subdirectory(const char *path, const char *action,
+/*
+ * Check that checking out ce->sha1 in subdir ce->name is not
+ * going to overwrite any working files.
+ *
+ * Currently, git does not checkout subprojects during a superproject
+ * checkout, so it is not going to overwrite anything.
+ */
+static int verify_clean_submodule(struct cache_entry *ce, const char *action,
+ struct unpack_trees_options *o)
+{
+ return 0;
+}
+
+static int verify_clean_subdirectory(struct cache_entry *ce, const char *action,
struct unpack_trees_options *o)
{
/*
- * we are about to extract "path"; we would not want to lose
+ * we are about to extract "ce->name"; we would not want to lose
* anything in the existing directory there.
*/
int namelen;
@@ -437,13 +456,24 @@ static int verify_clean_subdirectory(const char *path, const char *action,
struct dir_struct d;
char *pathbuf;
int cnt = 0;
+ unsigned char sha1[20];
+
+ if (S_ISGITLINK(ntohl(ce->ce_mode)) &&
+ resolve_gitlink_ref(ce->name, "HEAD", sha1) == 0) {
+ /* If we are not going to update the submodule, then
+ * we don't care.
+ */
+ if (!hashcmp(sha1, ce->sha1))
+ return 0;
+ return verify_clean_submodule(ce, action, o);
+ }
/*
* First let's make sure we do not have a local modification
* in that directory.
*/
- namelen = strlen(path);
- pos = cache_name_pos(path, namelen);
+ namelen = strlen(ce->name);
+ pos = cache_name_pos(ce->name, namelen);
if (0 <= pos)
return cnt; /* we have it as nondirectory */
pos = -pos - 1;
@@ -451,7 +481,7 @@ static int verify_clean_subdirectory(const char *path, const char *action,
struct cache_entry *ce = active_cache[i];
int len = ce_namelen(ce);
if (len < namelen ||
- strncmp(path, ce->name, namelen) ||
+ strncmp(ce->name, ce->name, namelen) ||
ce->name[namelen] != '/')
break;
/*
@@ -469,16 +499,16 @@ static int verify_clean_subdirectory(const char *path, const char *action,
* present file that is not ignored.
*/
pathbuf = xmalloc(namelen + 2);
- memcpy(pathbuf, path, namelen);
+ memcpy(pathbuf, ce->name, namelen);
strcpy(pathbuf+namelen, "/");
memset(&d, 0, sizeof(d));
if (o->dir)
d.exclude_per_dir = o->dir->exclude_per_dir;
- i = read_directory(&d, path, pathbuf, namelen+1, NULL);
+ i = read_directory(&d, ce->name, pathbuf, namelen+1, NULL);
if (i)
die("Updating '%s' would lose untracked files in it",
- path);
+ ce->name);
free(pathbuf);
return cnt;
}
@@ -487,7 +517,7 @@ static int verify_clean_subdirectory(const char *path, const char *action,
* We do not want to remove or overwrite a working tree file that
* is not tracked, unless it is ignored.
*/
-static void verify_absent(const char *path, const char *action,
+static void verify_absent(struct cache_entry *ce, const char *action,
struct unpack_trees_options *o)
{
struct stat st;
@@ -495,15 +525,15 @@ static void verify_absent(const char *path, const char *action,
if (o->index_only || o->reset || !o->update)
return;
- if (has_symlink_leading_path(path, NULL))
+ if (has_symlink_leading_path(ce->name, NULL))
return;
- if (!lstat(path, &st)) {
+ if (!lstat(ce->name, &st)) {
int cnt;
- if (o->dir && excluded(o->dir, path))
+ if (o->dir && excluded(o->dir, ce->name))
/*
- * path is explicitly excluded, so it is Ok to
+ * ce->name is explicitly excluded, so it is Ok to
* overwrite it.
*/
return;
@@ -515,7 +545,7 @@ static void verify_absent(const char *path, const char *action,
* files that are in "foo/" we would lose
* it.
*/
- cnt = verify_clean_subdirectory(path, action, o);
+ cnt = verify_clean_subdirectory(ce, action, o);
/*
* If this removed entries from the index,
@@ -543,7 +573,7 @@ static void verify_absent(const char *path, const char *action,
* delete this path, which is in a subdirectory that
* is being replaced with a blob.
*/
- cnt = cache_name_pos(path, strlen(path));
+ cnt = cache_name_pos(ce->name, strlen(ce->name));
if (0 <= cnt) {
struct cache_entry *ce = active_cache[cnt];
if (!ce_stage(ce) && !ce->ce_mode)
@@ -551,7 +581,7 @@ static void verify_absent(const char *path, const char *action,
}
die("Untracked working tree file '%s' "
- "would be %s by merge.", path, action);
+ "would be %s by merge.", ce->name, action);
}
}
@@ -575,7 +605,7 @@ static int merged_entry(struct cache_entry *merge, struct cache_entry *old,
}
}
else {
- verify_absent(merge->name, "overwritten", o);
+ verify_absent(merge, "overwritten", o);
invalidate_ce_path(merge);
}
@@ -590,7 +620,7 @@ static int deleted_entry(struct cache_entry *ce, struct cache_entry *old,
if (old)
verify_uptodate(old, o);
else
- verify_absent(ce->name, "removed", o);
+ verify_absent(ce, "removed", o);
ce->ce_mode = 0;
add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
invalidate_ce_path(ce);
@@ -620,7 +650,8 @@ static void show_stage_entry(FILE *o,
#endif
int threeway_merge(struct cache_entry **stages,
- struct unpack_trees_options *o)
+ struct unpack_trees_options *o,
+ int remove)
{
struct cache_entry *index;
struct cache_entry *head;
@@ -698,8 +729,10 @@ int threeway_merge(struct cache_entry **stages,
}
/* #1 */
- if (!head && !remote && any_anc_missing)
+ if (!head && !remote && any_anc_missing) {
+ remove_entry(remove);
return 0;
+ }
/* Under the new "aggressive" rule, we resolve mostly trivial
* cases that we historically had git-merge-one-file resolve.
@@ -707,18 +740,18 @@ int threeway_merge(struct cache_entry **stages,
if (o->aggressive) {
int head_deleted = !head && !df_conflict_head;
int remote_deleted = !remote && !df_conflict_remote;
- const char *path = NULL;
+ struct cache_entry *ce = NULL;
if (index)
- path = index->name;
+ ce = index;
else if (head)
- path = head->name;
+ ce = head;
else if (remote)
- path = remote->name;
+ ce = remote;
else {
for (i = 1; i < o->head_idx; i++) {
if (stages[i] && stages[i] != o->df_conflict_entry) {
- path = stages[i]->name;
+ ce = stages[i];
break;
}
}
@@ -731,10 +764,11 @@ int threeway_merge(struct cache_entry **stages,
if ((head_deleted && remote_deleted) ||
(head_deleted && remote && remote_match) ||
(remote_deleted && head && head_match)) {
+ remove_entry(remove);
if (index)
return deleted_entry(index, index, o);
- else if (path && !head_deleted)
- verify_absent(path, "removed", o);
+ else if (ce && !head_deleted)
+ verify_absent(ce, "removed", o);
return 0;
}
/*
@@ -753,6 +787,7 @@ int threeway_merge(struct cache_entry **stages,
verify_uptodate(index, o);
}
+ remove_entry(remove);
o->nontrivial_merge = 1;
/* #2, #3, #4, #6, #7, #9, #10, #11. */
@@ -788,7 +823,8 @@ int threeway_merge(struct cache_entry **stages,
*
*/
int twoway_merge(struct cache_entry **src,
- struct unpack_trees_options *o)
+ struct unpack_trees_options *o,
+ int remove)
{
struct cache_entry *current = src[0];
struct cache_entry *oldtree = src[1];
@@ -816,6 +852,7 @@ int twoway_merge(struct cache_entry **src,
}
else if (oldtree && !newtree && same(current, oldtree)) {
/* 10 or 11 */
+ remove_entry(remove);
return deleted_entry(oldtree, current, o);
}
else if (oldtree && newtree &&
@@ -825,6 +862,7 @@ int twoway_merge(struct cache_entry **src,
}
else {
/* all other failures */
+ remove_entry(remove);
if (oldtree)
reject_merge(oldtree);
if (current)
@@ -836,8 +874,8 @@ int twoway_merge(struct cache_entry **src,
}
else if (newtree)
return merged_entry(newtree, current, o);
- else
- return deleted_entry(oldtree, current, o);
+ remove_entry(remove);
+ return deleted_entry(oldtree, current, o);
}
/*
@@ -847,7 +885,8 @@ int twoway_merge(struct cache_entry **src,
* stage0 does not have anything there.
*/
int bind_merge(struct cache_entry **src,
- struct unpack_trees_options *o)
+ struct unpack_trees_options *o,
+ int remove)
{
struct cache_entry *old = src[0];
struct cache_entry *a = src[1];
@@ -870,7 +909,8 @@ int bind_merge(struct cache_entry **src,
* - take the stat information from stage0, take the data from stage1
*/
int oneway_merge(struct cache_entry **src,
- struct unpack_trees_options *o)
+ struct unpack_trees_options *o,
+ int remove)
{
struct cache_entry *old = src[0];
struct cache_entry *a = src[1];
@@ -879,8 +919,10 @@ int oneway_merge(struct cache_entry **src,
return error("Cannot do a oneway merge of %d trees",
o->merge_size);
- if (!a)
+ if (!a) {
+ remove_entry(remove);
return deleted_entry(old, old, o);
+ }
if (old && same(old, a)) {
if (o->reset) {
struct stat st;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 05:12:48 +0000