X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=fetch.c;h=aeb6bf2639cc75b6f738348bcc267179a8a0da65;hb=640ce1052bbd6a8f1dd4d58beaa521d7592a0f02;hp=6ee61616dcd127cb97c1c39c401cdb51b953bddd;hpb=d0ac30f20ca1dd1d28a1b84bf13687f09cf535ae;p=git.git

diff --git a/fetch.c b/fetch.c
index 6ee61616d..aeb6bf263 100644
--- a/fetch.c
+++ b/fetch.c
@@ -3,18 +3,17 @@
 #include "cache.h"
 #include "commit.h"
 #include "tree.h"
+#include "tree-walk.h"
 #include "tag.h"
 #include "blob.h"
 #include "refs.h"
-
-const char *write_ref = NULL;
-
-const unsigned char *current_ref = NULL;
+#include "strbuf.h"
 
 int get_tree = 0;
 int get_history = 0;
 int get_all = 0;
 int get_verbosely = 0;
+int get_recover = 0;
 static unsigned char current_commit_sha1[20];
 
 void pull_say(const char *fmt, const char *hex) 
@@ -33,36 +32,44 @@ static void report_missing(const char *what, const unsigned char *missing)
 		what, missing_hex, sha1_to_hex(current_commit_sha1));
 }
 
-static int make_sure_we_have_it(const char *what, unsigned char *sha1)
-{
-	int status = 0;
-
-	if (!has_sha1_file(sha1)) {
-		status = fetch(sha1);
-		if (status && what)
-			report_missing(what, sha1);
-	}
-	return status;
-}
-
-static int process(unsigned char *sha1, const char *type);
+static int process(struct object *obj);
 
 static int process_tree(struct tree *tree)
 {
-	struct tree_entry_list *entries;
+	struct tree_desc desc;
+	struct name_entry entry;
 
 	if (parse_tree(tree))
 		return -1;
 
-	for (entries = tree->entries; entries; entries = entries->next) {
-		if (process(entries->item.any->sha1,
-			    entries->directory ? tree_type : blob_type))
+	desc.buf = tree->buffer;
+	desc.size = tree->size;
+	while (tree_entry(&desc, &entry)) {
+		struct object *obj = NULL;
+
+		if (S_ISDIR(entry.mode)) {
+			struct tree *tree = lookup_tree(entry.sha1);
+			if (tree)
+				obj = &tree->object;
+		}
+		else {
+			struct blob *blob = lookup_blob(entry.sha1);
+			if (blob)
+				obj = &blob->object;
+		}
+		if (!obj || process(obj))
 			return -1;
 	}
+	free(tree->buffer);
+	tree->buffer = NULL;
+	tree->size = 0;
 	return 0;
 }
 
-#define COMPLETE	1U
+#define COMPLETE	(1U << 0)
+#define SEEN		(1U << 1)
+#define TO_SCAN		(1U << 2)
+
 static struct commit_list *complete = NULL;
 
 static int process_commit(struct commit *commit)
@@ -73,15 +80,16 @@ static int process_commit(struct commit *commit)
 	while (complete && complete->item->date >= commit->date) {
 		pop_most_recent_commit(&complete, COMPLETE);
 	}
-		
 
 	if (commit->object.flags & COMPLETE)
 		return 0;
 
 	memcpy(current_commit_sha1, commit->object.sha1, 20);
 
+	pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
+
 	if (get_tree) {
-		if (process(commit->tree->object.sha1, tree_type))
+		if (process(&commit->tree->object))
 			return -1;
 		if (!get_all)
 			get_tree = 0;
@@ -89,8 +97,7 @@ static int process_commit(struct commit *commit)
 	if (get_history) {
 		struct commit_list *parents = commit->parents;
 		for (; parents; parents = parents->next) {
-			if (process(parents->item->object.sha1,
-				    commit_type))
+			if (process(&parents->item->object))
 				return -1;
 		}
 	}
@@ -101,7 +108,7 @@ static int process_tag(struct tag *tag)
 {
 	if (parse_tag(tag))
 		return -1;
-	return process(tag->tagged->sha1, NULL);
+	return process(tag->tagged);
 }
 
 static struct object_list *process_queue = NULL;
@@ -109,66 +116,71 @@ static struct object_list **process_queue_end = &process_queue;
 
 static int process_object(struct object *obj)
 {
-	if (obj->type == commit_type) {
+	if (obj->type == OBJ_COMMIT) {
 		if (process_commit((struct commit *)obj))
 			return -1;
 		return 0;
 	}
-	if (obj->type == tree_type) {
+	if (obj->type == OBJ_TREE) {
 		if (process_tree((struct tree *)obj))
 			return -1;
 		return 0;
 	}
-	if (obj->type == blob_type) {
+	if (obj->type == OBJ_BLOB) {
 		return 0;
 	}
-	if (obj->type == tag_type) {
+	if (obj->type == OBJ_TAG) {
 		if (process_tag((struct tag *)obj))
 			return -1;
 		return 0;
 	}
 	return error("Unable to determine requirements "
 		     "of type %s for %s",
-		     obj->type, sha1_to_hex(obj->sha1));
+		     typename(obj->type), sha1_to_hex(obj->sha1));
 }
 
-static int process(unsigned char *sha1, const char *type)
+static int process(struct object *obj)
 {
-	struct object *obj = lookup_object_type(sha1, type);
+	if (obj->flags & SEEN)
+		return 0;
+	obj->flags |= SEEN;
 
-	if (has_sha1_file(sha1)) {
-		parse_object(sha1);
+	if (has_sha1_file(obj->sha1)) {
 		/* We already have it, so we should scan it now. */
-		return process_object(obj);
+		obj->flags |= TO_SCAN;
 	}
-	if (object_list_contains(process_queue, obj))
-		return 0;
+	else {
+		if (obj->flags & COMPLETE)
+			return 0;
+		prefetch(obj->sha1);
+	}
+		
 	object_list_insert(obj, process_queue_end);
 	process_queue_end = &(*process_queue_end)->next;
-
-	//fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1));
-	prefetch(sha1);
-		
 	return 0;
 }
 
 static int loop(void)
 {
+	struct object_list *elem;
+
 	while (process_queue) {
 		struct object *obj = process_queue->item;
-		/*
-		fprintf(stderr, "%d objects to pull\n", 
-			object_list_length(process_queue));
-		*/
-		process_queue = process_queue->next;
+		elem = process_queue;
+		process_queue = elem->next;
+		free(elem);
 		if (!process_queue)
 			process_queue_end = &process_queue;
 
-		//fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1));
-		
-		if (make_sure_we_have_it(obj->type ? obj->type : "object", 
-					 obj->sha1))
-			return -1;
+		/* If we are not scanning this object, we placed it in
+		 * the queue because we needed to fetch it first.
+		 */
+		if (! (obj->flags & TO_SCAN)) {
+			if (fetch(obj->sha1)) {
+				report_missing(typename(obj->type), obj->sha1);
+				return -1;
+			}
+		}
 		if (!obj->type)
 			parse_object(obj->sha1);
 		if (process_object(obj))
@@ -199,34 +211,106 @@ static int mark_complete(const char *path, const unsigned char *sha1)
 	return 0;
 }
 
-int pull(char *target)
+int pull_targets_stdin(char ***target, const char ***write_ref)
 {
-	unsigned char sha1[20];
-	int fd = -1;
+	int targets = 0, targets_alloc = 0;
+	struct strbuf buf;
+	*target = NULL; *write_ref = NULL;
+	strbuf_init(&buf);
+	while (1) {
+		char *rf_one = NULL;
+		char *tg_one;
+
+		read_line(&buf, stdin, '\n');
+		if (buf.eof)
+			break;
+		tg_one = buf.buf;
+		rf_one = strchr(tg_one, '\t');
+		if (rf_one)
+			*rf_one++ = 0;
+
+		if (targets >= targets_alloc) {
+			targets_alloc = targets_alloc ? targets_alloc * 2 : 64;
+			*target = xrealloc(*target, targets_alloc * sizeof(**target));
+			*write_ref = xrealloc(*write_ref, targets_alloc * sizeof(**write_ref));
+		}
+		(*target)[targets] = strdup(tg_one);
+		(*write_ref)[targets] = rf_one ? strdup(rf_one) : NULL;
+		targets++;
+	}
+	return targets;
+}
+
+void pull_targets_free(int targets, char **target, const char **write_ref)
+{
+	while (targets--) {
+		free(target[targets]);
+		if (write_ref && write_ref[targets])
+			free((char *) write_ref[targets]);
+	}
+}
+
+int pull(int targets, char **target, const char **write_ref,
+         const char *write_ref_log_details)
+{
+	struct ref_lock **lock = xcalloc(targets, sizeof(struct ref_lock *));
+	unsigned char *sha1 = xmalloc(targets * 20);
+	char *msg;
+	int ret;
+	int i;
 
 	save_commit_buffer = 0;
-	if (write_ref && current_ref) {
-		fd = lock_ref_sha1(write_ref, current_ref);
-		if (fd < 0)
-			return -1;
+	track_object_refs = 0;
+
+	for (i = 0; i < targets; i++) {
+		if (!write_ref || !write_ref[i])
+			continue;
+
+		lock[i] = lock_ref_sha1(write_ref[i], NULL, 0);
+		if (!lock[i]) {
+			error("Can't lock ref %s", write_ref[i]);
+			goto unlock_and_fail;
+		}
 	}
 
-	for_each_ref(mark_complete);
+	if (!get_recover)
+		for_each_ref(mark_complete);
 
-	if (interpret_target(target, sha1))
-		return error("Could not interpret %s as something to pull",
-			     target);
-	if (process(sha1, NULL))
-		return -1;
-	if (loop())
-		return -1;
-	
-	if (write_ref) {
-		if (current_ref) {
-			write_ref_sha1(write_ref, fd, sha1);
-		} else {
-			write_ref_sha1_unlocked(write_ref, sha1);
+	for (i = 0; i < targets; i++) {
+		if (interpret_target(target[i], &sha1[20 * i])) {
+			error("Could not interpret %s as something to pull", target[i]);
+			goto unlock_and_fail;
 		}
+		if (process(lookup_unknown_object(&sha1[20 * i])))
+			goto unlock_and_fail;
+	}
+
+	if (loop())
+		goto unlock_and_fail;
+
+	if (write_ref_log_details) {
+		msg = xmalloc(strlen(write_ref_log_details) + 12);
+		sprintf(msg, "fetch from %s", write_ref_log_details);
+	} else {
+		msg = NULL;
+	}
+	for (i = 0; i < targets; i++) {
+		if (!write_ref || !write_ref[i])
+			continue;
+		ret = write_ref_sha1(lock[i], &sha1[20 * i], msg ? msg : "fetch (unknown)");
+		lock[i] = NULL;
+		if (ret)
+			goto unlock_and_fail;
 	}
+	if (msg)
+		free(msg);
+
 	return 0;
+
+
+unlock_and_fail:
+	for (i = 0; i < targets; i++)
+		if (lock[i])
+			unlock_ref(lock[i]);
+	return -1;
 }