X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=rev-list.c;h=67d2a483fce79e23433ef21f209e55f7ff7a171d;hb=c401cb48e77459a4ccad76888ad31bef252facc5;hp=e17f928061250c24465e1b96f89a18acb98a748c;hpb=93dcab2937624ebb97f91807576cddb242a55a46;p=git.git

diff --git a/rev-list.c b/rev-list.c
index e17f9280..67d2a483 100644
--- a/rev-list.c
+++ b/rev-list.c
@@ -12,6 +12,7 @@
 #define COUNTED		(1u << 2)
 #define SHOWN		(1u << 3)
 #define TREECHANGE	(1u << 4)
+#define TMP_MARK	(1u << 5) /* for isolated cases; clean after use */
 
 static const char rev_list_usage[] =
 "git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
@@ -21,15 +22,18 @@ static const char rev_list_usage[] =
 "    --min-age=epoch\n"
 "    --sparse\n"
 "    --no-merges\n"
+"    --remove-empty\n"
 "    --all\n"
 "  ordering output:\n"
 "    --merge-order [ --show-breaks ]\n"
 "    --topo-order\n"
+"    --date-order\n"
 "  formatting output:\n"
 "    --parents\n"
-"    --objects\n"
+"    --objects | --objects-edge\n"
 "    --unpacked\n"
 "    --header | --pretty\n"
+"    --abbrev=nr | --no-abbrev\n"
 "  special purpose:\n"
 "    --bisect"
 ;
@@ -40,7 +44,9 @@ static int bisect_list = 0;
 static int tag_objects = 0;
 static int tree_objects = 0;
 static int blob_objects = 0;
+static int edge_hint = 0;
 static int verbose_header = 0;
+static int abbrev = DEFAULT_ABBREV;
 static int show_parents = 0;
 static int hdr_termination = 0;
 static const char *commit_prefix = "";
@@ -52,8 +58,40 @@ static int merge_order = 0;
 static int show_breaks = 0;
 static int stop_traversal = 0;
 static int topo_order = 0;
+static int lifo = 1;
 static int no_merges = 0;
 static const char **paths = NULL;
+static int remove_empty_trees = 0;
+
+struct name_path {
+	struct name_path *up;
+	int elem_len;
+	const char *elem;
+};
+
+static char *path_name(struct name_path *path, const char *name)
+{
+	struct name_path *p;
+	char *n, *m;
+	int nlen = strlen(name);
+	int len = nlen + 1;
+
+	for (p = path; p; p = p->up) {
+		if (p->elem_len)
+			len += p->elem_len + 1;
+	}
+	n = xmalloc(len);
+	m = n + len - (nlen + 1);
+	strcpy(m, name);
+	for (p = path; p; p = p->up) {
+		if (p->elem_len) {
+			m -= p->elem_len + 1;
+			memcpy(m, p->elem, p->elem_len);
+			m[p->elem_len] = '/';
+		}
+	}
+	return n;
+}
 
 static void show_commit(struct commit *commit)
 {
@@ -70,9 +108,21 @@ static void show_commit(struct commit *commit)
 	if (show_parents) {
 		struct commit_list *parents = commit->parents;
 		while (parents) {
-			printf(" %s", sha1_to_hex(parents->item->object.sha1));
+			struct object *o = &(parents->item->object);
 			parents = parents->next;
+			if (o->flags & TMP_MARK)
+				continue;
+			printf(" %s", sha1_to_hex(o->sha1));
+			o->flags |= TMP_MARK;
 		}
+		/* TMP_MARK is a general purpose flag that can
+		 * be used locally, but the user should clean
+		 * things up after it is done with them.
+		 */
+		for (parents = commit->parents;
+		     parents;
+		     parents = parents->next)
+			parents->item->object.flags &= ~TMP_MARK;
 	}
 	if (commit_format == CMIT_FMT_ONELINE)
 		putchar(' ');
@@ -81,7 +131,7 @@ static void show_commit(struct commit *commit)
 
 	if (verbose_header) {
 		static char pretty_header[16384];
-		pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
+		pretty_print_commit(commit_format, commit, ~0, pretty_header, sizeof(pretty_header), abbrev);
 		printf("%s%c", pretty_header, hdr_termination);
 	}
 	fflush(stdout);
@@ -154,17 +204,23 @@ static int process_commit(struct commit * commit)
 	return CONTINUE;
 }
 
-static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name)
+static struct object_list **add_object(struct object *obj,
+				       struct object_list **p,
+				       struct name_path *path,
+				       const char *name)
 {
 	struct object_list *entry = xmalloc(sizeof(*entry));
 	entry->item = obj;
 	entry->next = *p;
-	entry->name = name;
+	entry->name = path_name(path, name);
 	*p = entry;
 	return &entry->next;
 }
 
-static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name)
+static struct object_list **process_blob(struct blob *blob,
+					 struct object_list **p,
+					 struct name_path *path,
+					 const char *name)
 {
 	struct object *obj = &blob->object;
 
@@ -173,13 +229,17 @@ static struct object_list **process_blob(struct blob *blob, struct object_list *
 	if (obj->flags & (UNINTERESTING | SEEN))
 		return p;
 	obj->flags |= SEEN;
-	return add_object(obj, p, name);
+	return add_object(obj, p, path, name);
 }
 
-static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name)
+static struct object_list **process_tree(struct tree *tree,
+					 struct object_list **p,
+					 struct name_path *path,
+					 const char *name)
 {
 	struct object *obj = &tree->object;
 	struct tree_entry_list *entry;
+	struct name_path me;
 
 	if (!tree_objects)
 		return p;
@@ -188,15 +248,18 @@ static struct object_list **process_tree(struct tree *tree, struct object_list *
 	if (parse_tree(tree) < 0)
 		die("bad tree object %s", sha1_to_hex(obj->sha1));
 	obj->flags |= SEEN;
-	p = add_object(obj, p, name);
+	p = add_object(obj, p, path, name);
+	me.up = path;
+	me.elem = name;
+	me.elem_len = strlen(name);
 	entry = tree->entries;
 	tree->entries = NULL;
 	while (entry) {
 		struct tree_entry_list *next = entry->next;
 		if (entry->directory)
-			p = process_tree(entry->item.tree, p, entry->name);
+			p = process_tree(entry->item.tree, p, &me, entry->name);
 		else
-			p = process_blob(entry->item.blob, p, entry->name);
+			p = process_blob(entry->item.blob, p, &me, entry->name);
 		free(entry);
 		entry = next;
 	}
@@ -211,7 +274,7 @@ static void show_commit_list(struct commit_list *list)
 	while (list) {
 		struct commit *commit = pop_most_recent_commit(&list, SEEN);
 
-		p = process_tree(commit->tree, p, "");
+		p = process_tree(commit->tree, p, NULL, "");
 		if (process_commit(commit) == STOP)
 			break;
 	}
@@ -222,22 +285,22 @@ static void show_commit_list(struct commit_list *list)
 			continue;
 		if (obj->type == tag_type) {
 			obj->flags |= SEEN;
-			p = add_object(obj, p, name);
+			p = add_object(obj, p, NULL, name);
 			continue;
 		}
 		if (obj->type == tree_type) {
-			p = process_tree((struct tree *)obj, p, name);
+			p = process_tree((struct tree *)obj, p, NULL, name);
 			continue;
 		}
 		if (obj->type == blob_type) {
-			p = process_blob((struct blob *)obj, p, name);
+			p = process_blob((struct blob *)obj, p, NULL, name);
 			continue;
 		}
 		die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
 	}
 	while (objects) {
-		/* An object with name "foo\n0000000000000000000000000000000000000000"
-		 * can be used confuse downstream git-pack-objects very badly.
+		/* An object with name "foo\n0000000..." can be used to
+		 * confuse downstream git-pack-objects very badly.
 		 */
 		const char *ep = strchr(objects->name, '\n');
 		if (ep) {
@@ -350,7 +413,8 @@ static int count_distance(struct commit_list *entry)
 
 		if (commit->object.flags & (UNINTERESTING | COUNTED))
 			break;
-		nr++;
+		if (!paths || (commit->object.flags & TREECHANGE))
+			nr++;
 		commit->object.flags |= COUNTED;
 		p = commit->parents;
 		entry = p;
@@ -362,6 +426,7 @@ static int count_distance(struct commit_list *entry)
 			}
 		}
 	}
+
 	return nr;
 }
 
@@ -382,15 +447,20 @@ static struct commit_list *find_bisection(struct commit_list *list)
 	nr = 0;
 	p = list;
 	while (p) {
-		nr++;
+		if (!paths || (p->item->object.flags & TREECHANGE))
+			nr++;
 		p = p->next;
 	}
 	closest = 0;
 	best = list;
 
-	p = list;
-	while (p) {
-		int distance = count_distance(p);
+	for (p = list; p; p = p->next) {
+		int distance;
+
+		if (paths && !(p->item->object.flags & TREECHANGE))
+			continue;
+
+		distance = count_distance(p);
 		clear_distance(list);
 		if (nr - distance < distance)
 			distance = nr - distance;
@@ -398,34 +468,68 @@ static struct commit_list *find_bisection(struct commit_list *list)
 			best = p;
 			closest = distance;
 		}
-		p = p->next;
 	}
 	if (best)
 		best->next = NULL;
 	return best;
 }
 
+static void mark_edge_parents_uninteresting(struct commit *commit)
+{
+	struct commit_list *parents;
+
+	for (parents = commit->parents; parents; parents = parents->next) {
+		struct commit *parent = parents->item;
+		if (!(parent->object.flags & UNINTERESTING))
+			continue;
+		mark_tree_uninteresting(parent->tree);
+		if (edge_hint && !(parent->object.flags & SHOWN)) {
+			parent->object.flags |= SHOWN;
+			printf("-%s\n", sha1_to_hex(parent->object.sha1));
+		}
+	}
+}
+
 static void mark_edges_uninteresting(struct commit_list *list)
 {
 	for ( ; list; list = list->next) {
-		struct commit_list *parents = list->item->parents;
+		struct commit *commit = list->item;
 
-		for ( ; parents; parents = parents->next) {
-			struct commit *commit = parents->item;
-			if (commit->object.flags & UNINTERESTING)
-				mark_tree_uninteresting(commit->tree);
+		if (commit->object.flags & UNINTERESTING) {
+			mark_tree_uninteresting(commit->tree);
+			continue;
 		}
+		mark_edge_parents_uninteresting(commit);
 	}
 }
 
-static int is_different = 0;
+#define TREE_SAME	0
+#define TREE_NEW	1
+#define TREE_DIFFERENT	2
+static int tree_difference = TREE_SAME;
 
 static void file_add_remove(struct diff_options *options,
 		    int addremove, unsigned mode,
 		    const unsigned char *sha1,
 		    const char *base, const char *path)
 {
-	is_different = 1;
+	int diff = TREE_DIFFERENT;
+
+	/*
+	 * Is it an add of a new file? It means that
+	 * the old tree didn't have it at all, so we
+	 * will turn "TREE_SAME" -> "TREE_NEW", but
+	 * leave any "TREE_DIFFERENT" alone (and if
+	 * it already was "TREE_NEW", we'll keep it
+	 * "TREE_NEW" of course).
+	 */
+	if (addremove == '+') {
+		diff = tree_difference;
+		if (diff != TREE_SAME)
+			return;
+		diff = TREE_NEW;
+	}
+	tree_difference = diff;
 }
 
 static void file_change(struct diff_options *options,
@@ -434,7 +538,7 @@ static void file_change(struct diff_options *options,
 		 const unsigned char *new_sha1,
 		 const char *base, const char *path)
 {
-	is_different = 1;
+	tree_difference = TREE_DIFFERENT;
 }
 
 static struct diff_options diff_opt = {
@@ -443,12 +547,16 @@ static struct diff_options diff_opt = {
 	.change = file_change,
 };
 
-static int same_tree(struct tree *t1, struct tree *t2)
+static int compare_tree(struct tree *t1, struct tree *t2)
 {
-	is_different = 0;
+	if (!t1)
+		return TREE_NEW;
+	if (!t2)
+		return TREE_DIFFERENT;
+	tree_difference = TREE_SAME;
 	if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0)
-		return 0;
-	return !is_different;
+		return TREE_DIFFERENT;
+	return tree_difference;
 }
 
 static int same_tree_as_empty(struct tree *t1)
@@ -468,28 +576,55 @@ static int same_tree_as_empty(struct tree *t1)
 	empty.buf = "";
 	empty.size = 0;
 
-	is_different = 0;
+	tree_difference = 0;
 	retval = diff_tree(&empty, &real, "", &diff_opt);
 	free(tree);
 
-	return retval >= 0 && !is_different;
+	return retval >= 0 && !tree_difference;
 }
 
-static struct commit *try_to_simplify_merge(struct commit *commit, struct commit_list *parent)
+static void try_to_simplify_commit(struct commit *commit)
 {
+	struct commit_list **pp, *parent;
+
 	if (!commit->tree)
-		return NULL;
+		return;
 
-	while (parent) {
+	if (!commit->parents) {
+		if (!same_tree_as_empty(commit->tree))
+			commit->object.flags |= TREECHANGE;
+		return;
+	}
+
+	pp = &commit->parents;
+	while ((parent = *pp) != NULL) {
 		struct commit *p = parent->item;
-		parent = parent->next;
+
+		if (p->object.flags & UNINTERESTING) {
+			pp = &parent->next;
+			continue;
+		}
+
 		parse_commit(p);
-		if (!p->tree)
+		switch (compare_tree(p->tree, commit->tree)) {
+		case TREE_SAME:
+			parent->next = NULL;
+			commit->parents = parent;
+			return;
+
+		case TREE_NEW:
+			if (remove_empty_trees && same_tree_as_empty(p->tree)) {
+				*pp = parent->next;
+				continue;
+			}
+		/* fallthrough */
+		case TREE_DIFFERENT:
+			pp = &parent->next;
 			continue;
-		if (same_tree(commit->tree, p->tree))
-			return p;
+		}
+		die("bad tree compare for commit %s", sha1_to_hex(commit->object.sha1));
 	}
-	return NULL;
+	commit->object.flags |= TREECHANGE;
 }
 
 static void add_parents_to_list(struct commit *commit, struct commit_list **list)
@@ -525,20 +660,14 @@ static void add_parents_to_list(struct commit *commit, struct commit_list **list
 	}
 
 	/*
-	 * Ok, the commit wasn't uninteresting. If it
-	 * is a merge, try to find the parent that has
-	 * no differences in the path set if one exists.
+	 * Ok, the commit wasn't uninteresting. Try to
+	 * simplify the commit history and find the parent
+	 * that has no differences in the path set if one exists.
 	 */
-	if (paths && parent && parent->next) {
-		struct commit *preferred;
-
-		preferred = try_to_simplify_merge(commit, parent);
-		if (preferred) {
-			parent->item = preferred;
-			parent->next = NULL;
-		}
-	}
+	if (paths)
+		try_to_simplify_commit(commit);
 
+	parent = commit->parents;
 	while (parent) {
 		struct commit *p = parent->item;
 
@@ -552,33 +681,6 @@ static void add_parents_to_list(struct commit *commit, struct commit_list **list
 	}
 }
 
-static void compress_list(struct commit_list *list)
-{
-	while (list) {
-		struct commit *commit = list->item;
-		struct commit_list *parent = commit->parents;
-		list = list->next;
-
-		if (!parent) {
-			if (!same_tree_as_empty(commit->tree))
-				commit->object.flags |= TREECHANGE;
-			continue;
-		}
-
-		/*
-		 * Exactly one parent? Check if it leaves the tree
-		 * unchanged
-		 */
-		if (!parent->next) {
-			struct tree *t1 = commit->tree;
-			struct tree *t2 = parent->item->tree;
-			if (!t1 || !t2 || same_tree(t1, t2))
-				continue;
-		}
-		commit->object.flags |= TREECHANGE;
-	}
-}
-
 static struct commit_list *limit_list(struct commit_list *list)
 {
 	struct commit_list *newlist = NULL;
@@ -608,8 +710,6 @@ static struct commit_list *limit_list(struct commit_list *list)
 	}
 	if (tree_objects)
 		mark_edges_uninteresting(newlist);
-	if (paths && dense)
-		compress_list(newlist);
 	if (bisect_list)
 		newlist = find_bisection(newlist);
 	return newlist;
@@ -617,7 +717,7 @@ static struct commit_list *limit_list(struct commit_list *list)
 
 static void add_pending_object(struct object *obj, const char *name)
 {
-	add_object(obj, &pending_objects, name);
+	add_object(obj, &pending_objects, NULL, name);
 }
 
 static struct commit *get_commit_reference(const char *name, const unsigned char *sha1, unsigned int flags)
@@ -726,6 +826,21 @@ int main(int argc, const char **argv)
 		struct commit *commit;
 		unsigned char sha1[20];
 
+		/* accept -<digit>, like traditilnal "head" */
+		if ((*arg == '-') && isdigit(arg[1])) {
+			max_count = atoi(arg + 1);
+			continue;
+		}
+		if (!strcmp(arg, "-n")) {
+			if (++i >= argc)
+				die("-n requires an argument");
+			max_count = atoi(argv[i]);
+			continue;
+		}
+		if (!strncmp(arg,"-n",2)) {
+			max_count = atoi(arg + 2);
+			continue;
+		}
 		if (!strncmp(arg, "--max-count=", 12)) {
 			max_count = atoi(arg + 12);
 			continue;
@@ -744,6 +859,18 @@ int main(int argc, const char **argv)
 			verbose_header = 1;
 			continue;
 		}
+		if (!strcmp(arg, "--no-abbrev")) {
+			abbrev = 0;
+			continue;
+		}
+		if (!strncmp(arg, "--abbrev=", 9)) {
+			abbrev = strtoul(arg + 9, NULL, 10);
+			if (abbrev && abbrev < MINIMUM_ABBREV)
+				abbrev = MINIMUM_ABBREV;
+			else if (40 < abbrev)
+				abbrev = 40;
+			continue;
+		}
 		if (!strncmp(arg, "--pretty", 8)) {
 			commit_format = get_commit_format(arg+8);
 			verbose_header = 1;
@@ -776,6 +903,13 @@ int main(int argc, const char **argv)
 			blob_objects = 1;
 			continue;
 		}
+		if (!strcmp(arg, "--objects-edge")) {
+			tag_objects = 1;
+			tree_objects = 1;
+			blob_objects = 1;
+			edge_hint = 1;
+			continue;
+		}
 		if (!strcmp(arg, "--unpacked")) {
 			unpacked = 1;
 			limited = 1;
@@ -791,6 +925,13 @@ int main(int argc, const char **argv)
 		}
 		if (!strcmp(arg, "--topo-order")) {
 		        topo_order = 1;
+			lifo = 1;
+		        limited = 1;
+			continue;
+		}
+		if (!strcmp(arg, "--date-order")) {
+		        topo_order = 1;
+			lifo = 0;
 		        limited = 1;
 			continue;
 		}
@@ -802,6 +943,10 @@ int main(int argc, const char **argv)
 			dense = 0;
 			continue;
 		}
+		if (!strcmp(arg, "--remove-empty")) {
+			remove_empty_trees = 1;
+			continue;
+		}
 		if (!strcmp(arg, "--")) {
 			i++;
 			break;
@@ -838,13 +983,18 @@ int main(int argc, const char **argv)
 			arg++;
 			limited = 1;
 		}
-		if (get_sha1(arg, sha1) < 0)
+		if (get_sha1(arg, sha1) < 0) {
+			struct stat st;
+			if (lstat(arg, &st) < 0)
+				die("'%s': %s", arg, strerror(errno));
 			break;
+		}
 		commit = get_commit_reference(arg, sha1, flags);
 		handle_one_commit(commit, &list);
 	}
 
-	if (!list)
+	if (!list &&
+	    (!(tag_objects||tree_objects||blob_objects) && !pending_objects))
 		usage(rev_list_usage);
 
 	paths = get_pathspec(prefix, argv + i);
@@ -866,7 +1016,7 @@ int main(int argc, const char **argv)
 	        if (limited)
 			list = limit_list(list);
 		if (topo_order)
-			sort_in_topological_order(&list);
+			sort_in_topological_order(&list, lifo);
 		show_commit_list(list);
 	} else {
 #ifndef NO_OPENSSL