summaryrefslogtreecommitdiff
path: root/unpack-trees.c
diff options
context:
space:
mode:
Diffstat (limited to 'unpack-trees.c')
-rw-r--r--unpack-trees.c221
1 files changed, 209 insertions, 12 deletions
diff --git a/unpack-trees.c b/unpack-trees.c
index 82a83db..01c2175 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -294,7 +294,7 @@ static void load_gitmodules_file(struct index_state *index,
repo_read_gitmodules(the_repository);
} else if (state && (ce->ce_flags & CE_UPDATE)) {
submodule_free(the_repository);
- checkout_entry(ce, state, NULL);
+ checkout_entry(ce, state, NULL, NULL);
repo_read_gitmodules(the_repository);
}
}
@@ -336,20 +336,64 @@ static struct progress *get_progress(struct unpack_trees_options *o)
return start_delayed_progress(_("Checking out files"), total);
}
+static void setup_collided_checkout_detection(struct checkout *state,
+ struct index_state *index)
+{
+ int i;
+
+ state->clone = 1;
+ for (i = 0; i < index->cache_nr; i++)
+ index->cache[i]->ce_flags &= ~CE_MATCHED;
+}
+
+static void report_collided_checkout(struct index_state *index)
+{
+ struct string_list list = STRING_LIST_INIT_NODUP;
+ int i;
+
+ for (i = 0; i < index->cache_nr; i++) {
+ struct cache_entry *ce = index->cache[i];
+
+ if (!(ce->ce_flags & CE_MATCHED))
+ continue;
+
+ string_list_append(&list, ce->name);
+ ce->ce_flags &= ~CE_MATCHED;
+ }
+
+ list.cmp = fspathcmp;
+ string_list_sort(&list);
+
+ if (list.nr) {
+ warning(_("the following paths have collided (e.g. case-sensitive paths\n"
+ "on a case-insensitive filesystem) and only one from the same\n"
+ "colliding group is in the working tree:\n"));
+
+ for (i = 0; i < list.nr; i++)
+ fprintf(stderr, " '%s'\n", list.items[i].string);
+ }
+
+ string_list_clear(&list, 0);
+}
+
static int check_updates(struct unpack_trees_options *o)
{
unsigned cnt = 0;
int errs = 0;
- struct progress *progress = NULL;
+ struct progress *progress;
struct index_state *index = &o->result;
struct checkout state = CHECKOUT_INIT;
int i;
+ trace_performance_enter();
state.force = 1;
state.quiet = 1;
state.refresh_cache = 1;
state.istate = index;
+ if (o->clone)
+ setup_collided_checkout_detection(&state, index);
+
progress = get_progress(o);
if (o->update)
@@ -406,14 +450,19 @@ static int check_updates(struct unpack_trees_options *o)
display_progress(progress, ++cnt);
ce->ce_flags &= ~CE_UPDATE;
if (o->update && !o->dry_run) {
- errs |= checkout_entry(ce, &state, NULL);
+ errs |= checkout_entry(ce, &state, NULL, NULL);
}
}
}
stop_progress(&progress);
- errs |= finish_delayed_checkout(&state);
+ errs |= finish_delayed_checkout(&state, NULL);
if (o->update)
git_attr_set_direction(GIT_ATTR_CHECKIN);
+
+ if (o->clone)
+ report_collided_checkout(index);
+
+ trace_performance_leave("check_updates");
return errs != 0;
}
@@ -630,7 +679,114 @@ static int switch_cache_bottom(struct traverse_info *info)
static inline int are_same_oid(struct name_entry *name_j, struct name_entry *name_k)
{
- return name_j->oid && name_k->oid && !oidcmp(name_j->oid, name_k->oid);
+ return !is_null_oid(&name_j->oid) && !is_null_oid(&name_k->oid) && oideq(&name_j->oid, &name_k->oid);
+}
+
+static int all_trees_same_as_cache_tree(int n, unsigned long dirmask,
+ struct name_entry *names,
+ struct traverse_info *info)
+{
+ struct unpack_trees_options *o = info->data;
+ int i;
+
+ if (!o->merge || dirmask != ((1 << n) - 1))
+ return 0;
+
+ for (i = 1; i < n; i++)
+ if (!are_same_oid(names, names + i))
+ return 0;
+
+ return cache_tree_matches_traversal(o->src_index->cache_tree, names, info);
+}
+
+static int index_pos_by_traverse_info(struct name_entry *names,
+ struct traverse_info *info)
+{
+ struct unpack_trees_options *o = info->data;
+ int len = traverse_path_len(info, names);
+ char *name = xmalloc(len + 1 /* slash */ + 1 /* NUL */);
+ int pos;
+
+ make_traverse_path(name, info, names);
+ name[len++] = '/';
+ name[len] = '\0';
+ pos = index_name_pos(o->src_index, name, len);
+ if (pos >= 0)
+ BUG("This is a directory and should not exist in index");
+ pos = -pos - 1;
+ if (!starts_with(o->src_index->cache[pos]->name, name) ||
+ (pos > 0 && starts_with(o->src_index->cache[pos-1]->name, name)))
+ BUG("pos must point at the first entry in this directory");
+ free(name);
+ return pos;
+}
+
+/*
+ * Fast path if we detect that all trees are the same as cache-tree at this
+ * path. We'll walk these trees in an iterative loop using cache-tree/index
+ * instead of ODB since we already know what these trees contain.
+ */
+static int traverse_by_cache_tree(int pos, int nr_entries, int nr_names,
+ struct name_entry *names,
+ struct traverse_info *info)
+{
+ struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, };
+ struct unpack_trees_options *o = info->data;
+ struct cache_entry *tree_ce = NULL;
+ int ce_len = 0;
+ int i, d;
+
+ if (!o->merge)
+ BUG("We need cache-tree to do this optimization");
+
+ /*
+ * Do what unpack_callback() and unpack_nondirectories() normally
+ * do. But we walk all paths in an iterative loop instead.
+ *
+ * D/F conflicts and higher stage entries are not a concern
+ * because cache-tree would be invalidated and we would never
+ * get here in the first place.
+ */
+ for (i = 0; i < nr_entries; i++) {
+ int new_ce_len, len, rc;
+
+ src[0] = o->src_index->cache[pos + i];
+
+ len = ce_namelen(src[0]);
+ new_ce_len = cache_entry_size(len);
+
+ if (new_ce_len > ce_len) {
+ new_ce_len <<= 1;
+ tree_ce = xrealloc(tree_ce, new_ce_len);
+ memset(tree_ce, 0, new_ce_len);
+ ce_len = new_ce_len;
+
+ tree_ce->ce_flags = create_ce_flags(0);
+
+ for (d = 1; d <= nr_names; d++)
+ src[d] = tree_ce;
+ }
+
+ tree_ce->ce_mode = src[0]->ce_mode;
+ tree_ce->ce_namelen = len;
+ oidcpy(&tree_ce->oid, &src[0]->oid);
+ memcpy(tree_ce->name, src[0]->name, len + 1);
+
+ rc = call_unpack_fn((const struct cache_entry * const *)src, o);
+ if (rc < 0) {
+ free(tree_ce);
+ return rc;
+ }
+
+ mark_ce_used(src[0], o);
+ }
+ free(tree_ce);
+ if (o->debug_unpack)
+ printf("Unpacked %d entries from %s to %s using cache-tree\n",
+ nr_entries,
+ o->src_index->cache[pos]->name,
+ o->src_index->cache[pos + nr_entries - 1]->name);
+ return 0;
}
static int traverse_trees_recursive(int n, unsigned long dirmask,
@@ -638,12 +794,33 @@ static int traverse_trees_recursive(int n, unsigned long dirmask,
struct name_entry *names,
struct traverse_info *info)
{
+ struct unpack_trees_options *o = info->data;
int i, ret, bottom;
int nr_buf = 0;
struct tree_desc t[MAX_UNPACK_TREES];
void *buf[MAX_UNPACK_TREES];
struct traverse_info newinfo;
struct name_entry *p;
+ int nr_entries;
+
+ nr_entries = all_trees_same_as_cache_tree(n, dirmask, names, info);
+ if (nr_entries > 0) {
+ int pos = index_pos_by_traverse_info(names, info);
+
+ if (!o->merge || df_conflicts)
+ BUG("Wrong condition to get here buddy");
+
+ /*
+ * All entries up to 'pos' must have been processed
+ * (i.e. marked CE_UNPACKED) at this point. But to be safe,
+ * save and restore cache_bottom anyway to not miss
+ * unprocessed entries before 'pos'.
+ */
+ bottom = o->cache_bottom;
+ ret = traverse_by_cache_tree(pos, nr_entries, n, names, info);
+ o->cache_bottom = bottom;
+ return ret;
+ }
p = names;
while (!p->mode)
@@ -680,13 +857,13 @@ static int traverse_trees_recursive(int n, unsigned long dirmask,
else {
const struct object_id *oid = NULL;
if (dirmask & 1)
- oid = names[i].oid;
+ oid = &names[i].oid;
buf[nr_buf++] = fill_tree_descriptor(t + i, oid);
}
}
bottom = switch_cache_bottom(&newinfo);
- ret = traverse_trees(n, t, &newinfo);
+ ret = traverse_trees(o->src_index, n, t, &newinfo);
restore_cache_bottom(&newinfo, bottom);
for (i = 0; i < nr_buf; i++)
@@ -804,12 +981,17 @@ static struct cache_entry *create_ce_entry(const struct traverse_info *info,
ce->ce_mode = create_ce_mode(n->mode);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = len;
- oidcpy(&ce->oid, n->oid);
+ oidcpy(&ce->oid, &n->oid);
make_traverse_path(ce->name, info, n);
return ce;
}
+/*
+ * Note that traverse_by_cache_tree() duplicates some logic in this function
+ * without actually calling it. If you change the logic here you may need to
+ * check and change there as well.
+ */
static int unpack_nondirectories(int n, unsigned long mask,
unsigned long dirmask,
struct cache_entry **src,
@@ -1002,6 +1184,11 @@ static void debug_unpack_callback(int n,
debug_name_entry(i, names + i);
}
+/*
+ * Note that traverse_by_cache_tree() duplicates some logic in this function
+ * without actually calling it. If you change the logic here you may need to
+ * check and change there as well.
+ */
static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *names, struct traverse_info *info)
{
struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, };
@@ -1289,6 +1476,7 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
if (len > MAX_UNPACK_TREES)
die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES);
+ trace_performance_enter();
memset(&el, 0, sizeof(el));
if (!core_apply_sparse_checkout || !o->update)
o->skip_sparse_checkout = 1;
@@ -1361,7 +1549,10 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
}
}
- if (traverse_trees(len, t, &info) < 0)
+ trace_performance_enter();
+ ret = traverse_trees(o->src_index, len, t, &info);
+ trace_performance_leave("traverse_trees");
+ if (ret < 0)
goto return_failed;
}
@@ -1436,7 +1627,10 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
ret = check_updates(o) ? (-2) : 0;
if (o->dst_index) {
+ move_index_extensions(&o->result, o->src_index);
if (!ret) {
+ if (git_env_bool("GIT_TEST_CHECK_CACHE_TREE", 0))
+ cache_tree_verify(the_repository, &o->result);
if (!o->result.cache_tree)
o->result.cache_tree = cache_tree();
if (!cache_tree_fully_valid(o->result.cache_tree))
@@ -1444,7 +1638,6 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
WRITE_TREE_SILENT |
WRITE_TREE_REPAIR);
}
- move_index_extensions(&o->result, o->src_index);
discard_index(o->dst_index);
*o->dst_index = o->result;
} else {
@@ -1453,6 +1646,7 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
o->src_index = NULL;
done:
+ trace_performance_leave("unpack_trees");
clear_exclude_list(&el);
return ret;
@@ -1484,7 +1678,7 @@ static int same(const struct cache_entry *a, const struct cache_entry *b)
if ((a->ce_flags | b->ce_flags) & CE_CONFLICTED)
return 0;
return a->ce_mode == b->ce_mode &&
- !oidcmp(&a->oid, &b->oid);
+ oideq(&a->oid, &b->oid);
}
@@ -1616,7 +1810,7 @@ static int verify_clean_subdirectory(const struct cache_entry *ce,
* If we are not going to update the submodule, then
* we don't care.
*/
- if (!sub_head && !oidcmp(&oid, &ce->oid))
+ if (!sub_head && oideq(&oid, &ce->oid))
return 0;
return verify_clean_submodule(sub_head ? NULL : oid_to_hex(&oid),
ce, error_type, o);
@@ -1644,6 +1838,7 @@ static int verify_clean_subdirectory(const struct cache_entry *ce,
if (verify_uptodate(ce2, o))
return -1;
add_entry(o, ce2, CE_REMOVE, 0);
+ invalidate_ce_path(ce, o);
mark_ce_used(ce2, o);
}
cnt++;
@@ -1903,6 +2098,8 @@ static int keep_entry(const struct cache_entry *ce,
struct unpack_trees_options *o)
{
add_entry(o, ce, 0, 0);
+ if (ce_stage(ce))
+ invalidate_ce_path(ce, o);
return 1;
}