git-fetch: use fetch--tool pick-rref to avoid local fetch from alternate
[gitweb.git] / fetch-pack.c
index c527bf9e9621519f72e1039313666a03ee12c586..06f4aeced439312c43f2736a1684f9e22218899b 100644 (file)
@@ -4,16 +4,21 @@
 #include "commit.h"
 #include "tag.h"
 #include "exec_cmd.h"
+#include "pack.h"
 #include "sideband.h"
 
 static int keep_pack;
+static int transfer_unpack_limit = -1;
+static int fetch_unpack_limit = -1;
+static int unpack_limit = 100;
 static int quiet;
 static int verbose;
 static int fetch_all;
 static int depth;
+static int no_progress;
 static const char fetch_pack_usage[] =
-"git-fetch-pack [--all] [-q] [-v] [-k] [--thin] [--exec=upload-pack] [--depth=<n>] [host:]directory <refs>...";
-static const char *exec = "git-upload-pack";
+"git-fetch-pack [--all] [--quiet|-q] [--keep|-k] [--thin] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]";
+static const char *uploadpack = "git-upload-pack";
 
 #define COMPLETE       (1U << 0)
 #define COMMON         (1U << 1)
@@ -169,12 +174,13 @@ static int find_common(int fd[2], unsigned char *result_sha1,
                }
 
                if (!fetching)
-                       packet_write(fd[1], "want %s%s%s%s%s%s\n",
+                       packet_write(fd[1], "want %s%s%s%s%s%s%s\n",
                                     sha1_to_hex(remote),
                                     (multi_ack ? " multi_ack" : ""),
                                     (use_sideband == 2 ? " side-band-64k" : ""),
                                     (use_sideband == 1 ? " side-band" : ""),
                                     (use_thin_pack ? " thin-pack" : ""),
+                                    (no_progress ? " no-progress" : ""),
                                     " ofs-delta");
                else
                        packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
@@ -194,13 +200,13 @@ static int find_common(int fd[2], unsigned char *result_sha1,
                int len;
 
                while ((len = packet_read_line(fd[0], line, sizeof(line)))) {
-                       if (!strncmp("shallow ", line, 8)) {
+                       if (!prefixcmp(line, "shallow ")) {
                                if (get_sha1_hex(line + 8, sha1))
                                        die("invalid shallow line: %s", line);
                                register_shallow(sha1);
                                continue;
                        }
-                       if (!strncmp("unshallow ", line, 10)) {
+                       if (!prefixcmp(line, "unshallow ")) {
                                if (get_sha1_hex(line + 10, sha1))
                                        die("invalid unshallow line: %s", line);
                                if (!lookup_object(sha1))
@@ -342,7 +348,7 @@ static void filter_refs(struct ref **refs, int nr_match, char **match)
                    check_ref_format(ref->name + 5))
                        ; /* trash */
                else if (fetch_all &&
-                        (!depth || strncmp(ref->name, "refs/tags/", 10) )) {
+                        (!depth || prefixcmp(ref->name, "refs/tags/") )) {
                        *newtail = ref;
                        ref->next = NULL;
                        newtail = &ref->next;
@@ -486,13 +492,58 @@ static pid_t setup_sideband(int fd[2], int xd[2])
        return side_pid;
 }
 
-static int get_pack(int xd[2], const char **argv)
+static int get_pack(int xd[2])
 {
        int status;
        pid_t pid, side_pid;
        int fd[2];
+       const char *argv[20];
+       char keep_arg[256];
+       char hdr_arg[256];
+       const char **av;
+       int do_keep = keep_pack;
 
        side_pid = setup_sideband(fd, xd);
+
+       av = argv;
+       *hdr_arg = 0;
+       if (unpack_limit) {
+               struct pack_header header;
+
+               if (read_pack_header(fd[0], &header))
+                       die("protocol error: bad pack header");
+               snprintf(hdr_arg, sizeof(hdr_arg), "--pack_header=%u,%u",
+                        ntohl(header.hdr_version), ntohl(header.hdr_entries));
+               if (ntohl(header.hdr_entries) < unpack_limit)
+                       do_keep = 0;
+               else
+                       do_keep = 1;
+       }
+
+       if (do_keep) {
+               *av++ = "index-pack";
+               *av++ = "--stdin";
+               if (!quiet && !no_progress)
+                       *av++ = "-v";
+               if (use_thin_pack)
+                       *av++ = "--fix-thin";
+               if (keep_pack > 1 || unpack_limit) {
+                       int s = sprintf(keep_arg,
+                                       "--keep=fetch-pack %d on ", getpid());
+                       if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
+                               strcpy(keep_arg + s, "localhost");
+                       *av++ = keep_arg;
+               }
+       }
+       else {
+               *av++ = "unpack-objects";
+               if (quiet)
+                       *av++ = "-q";
+       }
+       if (*hdr_arg)
+               *av++ = hdr_arg;
+       *av++ = NULL;
+
        pid = fork();
        if (pid < 0)
                die("fetch-pack: unable to fork off %s", argv[0]);
@@ -522,39 +573,10 @@ static int get_pack(int xd[2], const char **argv)
        die("%s died of unnatural causes %d", argv[0], status);
 }
 
-static int explode_rx_pack(int xd[2])
-{
-       const char *argv[3] = { "unpack-objects", quiet ? "-q" : NULL, NULL };
-       return get_pack(xd, argv);
-}
-
-static int keep_rx_pack(int xd[2])
-{
-       const char *argv[6];
-       char keep_arg[256];
-       int n = 0;
-
-       argv[n++] = "index-pack";
-       argv[n++] = "--stdin";
-       if (!quiet)
-               argv[n++] = "-v";
-       if (use_thin_pack)
-               argv[n++] = "--fix-thin";
-       if (keep_pack > 1) {
-               int s = sprintf(keep_arg, "--keep=fetch-pack %i on ", getpid());
-               if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
-                       strcpy(keep_arg + s, "localhost");
-               argv[n++] = keep_arg;
-       }
-       argv[n] = NULL;
-       return get_pack(xd, argv);
-}
-
 static int fetch_pack(int fd[2], int nr_match, char **match)
 {
        struct ref *ref;
        unsigned char sha1[20];
-       int status;
 
        get_remote_heads(fd[0], &ref, 0, NULL, 0);
        if (is_repository_shallow() && !server_supports("shallow"))
@@ -589,8 +611,7 @@ static int fetch_pack(int fd[2], int nr_match, char **match)
                         */
                        fprintf(stderr, "warning: no common commits\n");
 
-       status = (keep_pack) ? keep_rx_pack(fd) : explode_rx_pack(fd);
-       if (status)
+       if (get_pack(fd))
                die("git-fetch-pack: fetch failed.");
 
  all_done:
@@ -625,6 +646,23 @@ static int remove_duplicates(int nr_heads, char **heads)
        return dst;
 }
 
+static int fetch_pack_config(const char *var, const char *value)
+{
+       if (strcmp(var, "fetch.unpacklimit") == 0) {
+               fetch_unpack_limit = git_config_int(var, value);
+               return 0;
+       }
+
+       if (strcmp(var, "transfer.unpacklimit") == 0) {
+               transfer_unpack_limit = git_config_int(var, value);
+               return 0;
+       }
+
+       return git_default_config(var, value);
+}
+
+static struct lock_file lock;
+
 int main(int argc, char **argv)
 {
        int i, ret, nr_heads;
@@ -632,9 +670,14 @@ int main(int argc, char **argv)
        int fd[2];
        pid_t pid;
        struct stat st;
-       struct lock_file lock;
 
        setup_git_directory();
+       git_config(fetch_pack_config);
+
+       if (0 <= transfer_unpack_limit)
+               unpack_limit = transfer_unpack_limit;
+       else if (0 <= fetch_unpack_limit)
+               unpack_limit = fetch_unpack_limit;
 
        nr_heads = 0;
        heads = NULL;
@@ -642,8 +685,12 @@ int main(int argc, char **argv)
                char *arg = argv[i];
 
                if (*arg == '-') {
-                       if (!strncmp("--exec=", arg, 7)) {
-                               exec = arg + 7;
+                       if (!prefixcmp(arg, "--upload-pack=")) {
+                               uploadpack = arg + 14;
+                               continue;
+                       }
+                       if (!prefixcmp(arg, "--exec=")) {
+                               uploadpack = arg + 7;
                                continue;
                        }
                        if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
@@ -652,6 +699,7 @@ int main(int argc, char **argv)
                        }
                        if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
                                keep_pack++;
+                               unpack_limit = 0;
                                continue;
                        }
                        if (!strcmp("--thin", arg)) {
@@ -666,12 +714,16 @@ int main(int argc, char **argv)
                                verbose = 1;
                                continue;
                        }
-                       if (!strncmp("--depth=", arg, 8)) {
+                       if (!prefixcmp(arg, "--depth=")) {
                                depth = strtol(arg + 8, NULL, 0);
                                if (stat(git_path("shallow"), &st))
                                        st.st_mtime = 0;
                                continue;
                        }
+                       if (!strcmp("--no-progress", arg)) {
+                               no_progress = 1;
+                               continue;
+                       }
                        usage(fetch_pack_usage);
                }
                dest = arg;
@@ -681,7 +733,7 @@ int main(int argc, char **argv)
        }
        if (!dest)
                usage(fetch_pack_usage);
-       pid = git_connect(fd, dest, exec);
+       pid = git_connect(fd, dest, uploadpack);
        if (pid < 0)
                return 1;
        if (heads && nr_heads)