diff options
Diffstat (limited to 'unpack-trees.c')
-rw-r--r-- | unpack-trees.c | 207 |
1 files changed, 202 insertions, 5 deletions
diff --git a/unpack-trees.c b/unpack-trees.c index 82a83dbc67..51bfac6aa0 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -336,6 +336,46 @@ 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; @@ -345,11 +385,15 @@ static int check_updates(struct unpack_trees_options *o) 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) @@ -414,6 +458,11 @@ static int check_updates(struct unpack_trees_options *o) errs |= finish_delayed_checkout(&state); 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 name_j->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, @@ -644,6 +800,27 @@ static int traverse_trees_recursive(int n, unsigned long dirmask, 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) { + struct unpack_trees_options *o = info->data; + 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) @@ -810,6 +987,11 @@ static struct cache_entry *create_ce_entry(const struct traverse_info *info, 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(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(&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; } |