#include "cache.h"
#include "commit.h"
#include "tree.h"
+#include "tag.h"
+#include "blob.h"
+#include "refs.h"
+
+const char *write_ref = NULL;
+
+const unsigned char *current_ref = NULL;
int get_tree = 0;
int get_history = 0;
int get_all = 0;
+int get_verbosely = 0;
+static unsigned char current_commit_sha1[20];
+
+static const char commitS[] = "commit";
+static const char treeS[] = "tree";
+static const char blobS[] = "blob";
+
+void pull_say(const char *fmt, const char *hex) {
+ if (get_verbosely)
+ fprintf(stderr, fmt, hex);
+}
-static int make_sure_we_have_it(unsigned char *sha1)
+static void report_missing(const char *what, const unsigned char *missing)
{
- if (has_sha1_file(sha1))
- return 0;
- return fetch(sha1);
+ char missing_hex[41];
+
+ strcpy(missing_hex, sha1_to_hex(missing));;
+ fprintf(stderr,
+ "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
+ 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_unknown(unsigned char *sha1);
+
static int process_tree(unsigned char *sha1)
{
struct tree *tree = lookup_tree(sha1);
return -1;
for (entries = tree->entries; entries; entries = entries->next) {
- if (make_sure_we_have_it(entries->item.tree->object.sha1))
+ const char *what = entries->directory ? treeS : blobS;
+ if (make_sure_we_have_it(what, entries->item.tree->object.sha1))
return -1;
if (entries->directory) {
if (process_tree(entries->item.tree->object.sha1))
{
struct commit *obj = lookup_commit(sha1);
- if (make_sure_we_have_it(sha1))
+ if (make_sure_we_have_it(commitS, sha1))
return -1;
if (parse_commit(obj))
return -1;
if (get_tree) {
- if (make_sure_we_have_it(obj->tree->object.sha1))
+ if (make_sure_we_have_it(treeS, obj->tree->object.sha1))
return -1;
if (process_tree(obj->tree->object.sha1))
return -1;
for (; parents; parents = parents->next) {
if (has_sha1_file(parents->item->object.sha1))
continue;
- if (make_sure_we_have_it(parents->item->object.sha1)) {
+ if (make_sure_we_have_it(NULL,
+ parents->item->object.sha1)) {
/* The server might not have it, and
* we don't mind.
*/
}
if (process_commit(parents->item->object.sha1))
return -1;
+ memcpy(current_commit_sha1, sha1, 20);
}
}
return 0;
}
+static int process_tag(unsigned char *sha1)
+{
+ struct tag *obj = lookup_tag(sha1);
+
+ if (parse_tag(obj))
+ return -1;
+ return process_unknown(obj->tagged->sha1);
+}
+
+static int process_unknown(unsigned char *sha1)
+{
+ struct object *obj;
+ if (make_sure_we_have_it("object", sha1))
+ return -1;
+ obj = parse_object(sha1);
+ if (!obj)
+ return error("Unable to parse object %s", sha1_to_hex(sha1));
+ if (obj->type == commit_type)
+ return process_commit(sha1);
+ if (obj->type == tree_type)
+ return process_tree(sha1);
+ if (obj->type == blob_type)
+ return 0;
+ if (obj->type == tag_type)
+ return process_tag(sha1);
+ return error("Unable to determine requirement of type %s for %s",
+ obj->type, sha1_to_hex(sha1));
+}
+
+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;
+}
+
+
int pull(char *target)
{
- int retval;
unsigned char sha1[20];
- retval = get_sha1_hex(target, sha1);
- if (retval)
- return retval;
- retval = make_sure_we_have_it(sha1);
- if (retval)
- return retval;
- return process_commit(sha1);
+ int fd = -1;
+
+ if (write_ref && current_ref) {
+ fd = lock_ref_sha1(write_ref, current_ref);
+ if (fd < 0)
+ return -1;
+ }
+
+ if (interpret_target(target, sha1))
+ return error("Could not interpret %s as something to pull",
+ target);
+ if (process_unknown(sha1))
+ return -1;
+
+ if (write_ref) {
+ if (current_ref) {
+ write_ref_sha1(write_ref, fd, sha1);
+ } else {
+ write_ref_sha1_unlocked(write_ref, sha1);
+ }
+ }
+ return 0;
}