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authorDaniel Barkalow <barkalow@iabervon.org>2007-09-11 03:02:45 (GMT)
committerJunio C Hamano <gitster@pobox.com>2007-09-19 10:22:30 (GMT)
commit30ae764b1e11f10b5fca723a876a0f3de3ca11ab (patch)
treeb947d1e54e9bb87327e45395f28d4356821988c9 /fetch.c
parentfbdeef948bbc085124f9634d5108940dce5fc688 (diff)
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Modularize commit-walker
This turns the extern functions to be provided by the backend into a struct of pointers, renames the functions to be more namespace-friendly, and updates http-fetch to this interface. It removes the unused include from http-push.c. It makes git-http-fetch a builtin (with the implementation a separate file, accessible directly). Signed-off-by: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'fetch.c')
-rw-r--r--fetch.c317
1 files changed, 0 insertions, 317 deletions
diff --git a/fetch.c b/fetch.c
deleted file mode 100644
index 811be87..0000000
--- a/fetch.c
+++ /dev/null
@@ -1,317 +0,0 @@
-#include "cache.h"
-#include "fetch.h"
-#include "commit.h"
-#include "tree.h"
-#include "tree-walk.h"
-#include "tag.h"
-#include "blob.h"
-#include "refs.h"
-#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)
-{
- if (get_verbosely)
- fprintf(stderr, fmt, hex);
-}
-
-static void report_missing(const struct object *obj)
-{
- char missing_hex[41];
- strcpy(missing_hex, sha1_to_hex(obj->sha1));;
- fprintf(stderr, "Cannot obtain needed %s %s\n",
- obj->type ? typename(obj->type): "object", missing_hex);
- if (!is_null_sha1(current_commit_sha1))
- fprintf(stderr, "while processing commit %s.\n",
- sha1_to_hex(current_commit_sha1));
-}
-
-static int process(struct object *obj);
-
-static int process_tree(struct tree *tree)
-{
- struct tree_desc desc;
- struct name_entry entry;
-
- if (parse_tree(tree))
- return -1;
-
- init_tree_desc(&desc, tree->buffer, tree->size);
- while (tree_entry(&desc, &entry)) {
- struct object *obj = NULL;
-
- /* submodule commits are not stored in the superproject */
- if (S_ISGITLINK(entry.mode))
- continue;
- 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 << 0)
-#define SEEN (1U << 1)
-#define TO_SCAN (1U << 2)
-
-static struct commit_list *complete = NULL;
-
-static int process_commit(struct commit *commit)
-{
- if (parse_commit(commit))
- return -1;
-
- while (complete && complete->item->date >= commit->date) {
- pop_most_recent_commit(&complete, COMPLETE);
- }
-
- if (commit->object.flags & COMPLETE)
- return 0;
-
- hashcpy(current_commit_sha1, commit->object.sha1);
-
- pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
-
- if (get_tree) {
- if (process(&commit->tree->object))
- return -1;
- if (!get_all)
- get_tree = 0;
- }
- if (get_history) {
- struct commit_list *parents = commit->parents;
- for (; parents; parents = parents->next) {
- if (process(&parents->item->object))
- return -1;
- }
- }
- return 0;
-}
-
-static int process_tag(struct tag *tag)
-{
- if (parse_tag(tag))
- return -1;
- return process(tag->tagged);
-}
-
-static struct object_list *process_queue = NULL;
-static struct object_list **process_queue_end = &process_queue;
-
-static int process_object(struct object *obj)
-{
- if (obj->type == OBJ_COMMIT) {
- if (process_commit((struct commit *)obj))
- return -1;
- return 0;
- }
- if (obj->type == OBJ_TREE) {
- if (process_tree((struct tree *)obj))
- return -1;
- return 0;
- }
- if (obj->type == OBJ_BLOB) {
- return 0;
- }
- 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",
- typename(obj->type), sha1_to_hex(obj->sha1));
-}
-
-static int process(struct object *obj)
-{
- if (obj->flags & SEEN)
- return 0;
- obj->flags |= SEEN;
-
- if (has_sha1_file(obj->sha1)) {
- /* We already have it, so we should scan it now. */
- obj->flags |= TO_SCAN;
- }
- else {
- if (obj->flags & COMPLETE)
- return 0;
- prefetch(obj->sha1);
- }
-
- object_list_insert(obj, process_queue_end);
- process_queue_end = &(*process_queue_end)->next;
- return 0;
-}
-
-static int loop(void)
-{
- struct object_list *elem;
-
- while (process_queue) {
- struct object *obj = process_queue->item;
- elem = process_queue;
- process_queue = elem->next;
- free(elem);
- if (!process_queue)
- process_queue_end = &process_queue;
-
- /* 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(obj);
- return -1;
- }
- }
- if (!obj->type)
- parse_object(obj->sha1);
- if (process_object(obj))
- return -1;
- }
- return 0;
-}
-
-static int interpret_target(char *target, unsigned char *sha1)
-{
- if (!get_sha1_hex(target, sha1))
- return 0;
- if (!check_ref_format(target)) {
- if (!fetch_ref(target, sha1)) {
- return 0;
- }
- }
- return -1;
-}
-
-static int mark_complete(const char *path, const unsigned char *sha1, int flag, void *cb_data)
-{
- struct commit *commit = lookup_commit_reference_gently(sha1, 1);
- if (commit) {
- commit->object.flags |= COMPLETE;
- insert_by_date(commit, &complete);
- }
- return 0;
-}
-
-int pull_targets_stdin(char ***target, const char ***write_ref)
-{
- 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] = xstrdup(tg_one);
- (*write_ref)[targets] = rf_one ? xstrdup(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;
- 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);
- if (!lock[i]) {
- error("Can't lock ref %s", write_ref[i]);
- goto unlock_and_fail;
- }
- }
-
- if (!get_recover)
- for_each_ref(mark_complete, NULL);
-
- 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;
- }
- free(msg);
-
- return 0;
-
-
-unlock_and_fail:
- for (i = 0; i < targets; i++)
- if (lock[i])
- unlock_ref(lock[i]);
- return -1;
-}