Merge branch 'bc/http-keep-memory-given-to-curl' into maint

[git-core/git.git] / fetch-pack.c

diff --git a/fetch-pack.c b/fetch-pack.c
index f156dd4..6b5467c 100644 (file)
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -20,6 +20,8 @@ static int no_done;
 static int fetch_fsck_objects = -1;
 static int transfer_fsck_objects = -1;
 static int agent_supported;
+static struct lock_file shallow_lock;
+static const char *alternate_shallow_file;
 
 #define COMPLETE       (1U << 0)
 #define COMMON         (1U << 1)
@@ -683,7 +685,7 @@ static int get_pack(struct fetch_pack_args *args,
                    int xd[2], char **pack_lockfile)
 {
        struct async demux;
-       const char *argv[20];
+       const char *argv[22];
        char keep_arg[256];
        char hdr_arg[256];
        const char **av;
@@ -724,6 +726,11 @@ static int get_pack(struct fetch_pack_args *args,
                        do_keep = 1;
        }
 
+       if (alternate_shallow_file) {
+               *av++ = "--shallow-file";
+               *av++ = alternate_shallow_file;
+       }
+
        if (do_keep) {
                if (pack_lockfile)
                        cmd.out = -1;
@@ -779,6 +786,27 @@ static int cmp_ref_by_name(const void *a_, const void *b_)
        return strcmp(a->name, b->name);
 }
 
+static void setup_alternate_shallow(void)
+{
+       struct strbuf sb = STRBUF_INIT;
+       int fd;
+
+       check_shallow_file_for_update();
+       fd = hold_lock_file_for_update(&shallow_lock, git_path("shallow"),
+                                      LOCK_DIE_ON_ERROR);
+       if (write_shallow_commits(&sb, 0)) {
+               if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+                       die_errno("failed to write to %s", shallow_lock.filename);
+               alternate_shallow_file = shallow_lock.filename;
+       } else
+               /*
+                * is_repository_shallow() sees empty string as "no
+                * shallow file".
+                */
+               alternate_shallow_file = "";
+       strbuf_release(&sb);
+}
+
 static struct ref *do_fetch_pack(struct fetch_pack_args *args,
                                 int fd[2],
                                 const struct ref *orig_ref,
@@ -858,6 +886,8 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 
        if (args->stateless_rpc)
                packet_flush(fd[1]);
+       if (args->depth > 0)
+               setup_alternate_shallow();
        if (get_pack(args, fd, pack_lockfile))
                die("git fetch-pack: fetch failed.");
 
@@ -936,15 +966,9 @@ struct ref *fetch_pack(struct fetch_pack_args *args,
                       struct ref **sought, int nr_sought,
                       char **pack_lockfile)
 {
-       struct stat st;
        struct ref *ref_cpy;
 
        fetch_pack_setup();
-       if (args->depth > 0) {
-               if (stat(git_path("shallow"), &st))
-                       st.st_mtime = 0;
-       }
-
        if (nr_sought)
                nr_sought = remove_duplicates_in_refs(sought, nr_sought);
 
@@ -954,35 +978,12 @@ struct ref *fetch_pack(struct fetch_pack_args *args,
        }
        ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, pack_lockfile);
 
-       if (args->depth > 0) {
-               static struct lock_file lock;
-               struct cache_time mtime;
-               struct strbuf sb = STRBUF_INIT;
-               char *shallow = git_path("shallow");
-               int fd;
-
-               mtime.sec = st.st_mtime;
-               mtime.nsec = ST_MTIME_NSEC(st);
-               if (stat(shallow, &st)) {
-                       if (mtime.sec)
-                               die("shallow file was removed during fetch");
-               } else if (st.st_mtime != mtime.sec
-#ifdef USE_NSEC
-                               || ST_MTIME_NSEC(st) != mtime.nsec
-#endif
-                         )
-                       die("shallow file was changed during fetch");
-
-               fd = hold_lock_file_for_update(&lock, shallow,
-                                              LOCK_DIE_ON_ERROR);
-               if (!write_shallow_commits(&sb, 0)
-                || write_in_full(fd, sb.buf, sb.len) != sb.len) {
-                       unlink_or_warn(shallow);
-                       rollback_lock_file(&lock);
-               } else {
-                       commit_lock_file(&lock);
-               }
-               strbuf_release(&sb);
+       if (alternate_shallow_file) {
+               if (*alternate_shallow_file == '\0') { /* --unshallow */
+                       unlink_or_warn(git_path("shallow"));
+                       rollback_lock_file(&shallow_lock);
+               } else
+                       commit_lock_file(&shallow_lock);
        }
 
        reprepare_packed_git();