git fetch-pack: add --diag-url

The main purpose is to trace the URL parser called by git_connect() in
connect.c

The main features of the parser can be listed as this:

- parse out host and path for URLs with a scheme (git:// file:// ssh://)
- parse host names embedded by [] correctly
- extract the port number, if present
- separate URLs like "file" (which are local)
  from URLs like "host:repo" which should use ssh

Add the new parameter "--diag-url" to "git fetch-pack", which prints
the value for protocol, host and path to stderr and exits.

Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index c8e858232a8e7a3536ef4d296efdc618e034c36e..758b5acd55aadcb43b6d11b02f0555a214b35744 100644 (file)
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -7,7 +7,7 @@
 static const char fetch_pack_usage[] =
 "git fetch-pack [--all] [--stdin] [--quiet|-q] [--keep|-k] [--thin] "
 "[--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] "
-"[--no-progress] [-v] [<host>:]<directory> [<refs>...]";
+"[--no-progress] [--diag-url] [-v] [<host>:]<directory> [<refs>...]";
 
 static void add_sought_entry_mem(struct ref ***sought, int *nr, int *alloc,
                                 const char *name, int namelen)
@@ -81,6 +81,10 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
                        args.stdin_refs = 1;
                        continue;
                }
+               if (!strcmp("--diag-url", arg)) {
+                       args.diag_url = 1;
+                       continue;
+               }
                if (!strcmp("-v", arg)) {
                        args.verbose = 1;
                        continue;
@@ -146,10 +150,14 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
                fd[0] = 0;
                fd[1] = 1;
        } else {
+               int flags = args.verbose ? CONNECT_VERBOSE : 0;
+               if (args.diag_url)
+                       flags |= CONNECT_DIAG_URL;
                conn = git_connect(fd, dest, args.uploadpack,
-                                  args.verbose ? CONNECT_VERBOSE : 0);
+                                  flags);
+               if (!conn)
+                       return args.diag_url ? 0 : 1;
        }
-
        get_remote_heads(fd[0], NULL, 0, &ref, 0, NULL);
 
        ref = fetch_pack(&args, fd, conn, ref, dest,

diff --git a/connect.c b/connect.c
index a6cf3454a2d4abc765c830bad7d8ffb419564b83..a16bdaf0b77a3e8de97cf15b6d198351950b7143 100644 (file)
--- a/connect.c
+++ b/connect.c
@@ -236,6 +236,20 @@ enum protocol {
        PROTO_GIT
 };
 
+static const char *prot_name(enum protocol protocol)
+{
+       switch (protocol) {
+               case PROTO_LOCAL:
+                       return "file";
+               case PROTO_SSH:
+                       return "ssh";
+               case PROTO_GIT:
+                       return "git";
+               default:
+                       return "unkown protocol";
+       }
+}
+
 static enum protocol get_protocol(const char *name)
 {
        if (!strcmp(name, "ssh"))
@@ -670,6 +684,20 @@ struct child_process *git_connect(int fd[2], const char *url,
        signal(SIGCHLD, SIG_DFL);
 
        protocol = parse_connect_url(url, &host, &port, &path);
+       if (flags & CONNECT_DIAG_URL) {
+               printf("Diag: url=%s\n", url ? url : "NULL");
+               printf("Diag: protocol=%s\n", prot_name(protocol));
+               printf("Diag: hostandport=%s", host ? host : "NULL");
+               if (port)
+                       printf(":%s\n", port);
+               else
+                       printf("\n");
+               printf("Diag: path=%s\n", path ? path : "NULL");
+               free(host);
+               free(port);
+               free(path);
+               return NULL;
+       }
 
        if (protocol == PROTO_GIT) {
                /* These underlying connection commands die() if they

diff --git a/connect.h b/connect.h
index 64fb7dbbee8714c034c5e018b3b1b4f8c29f0ea7..527d58a3b3cc6675e913190157984203c1895073 100644 (file)
--- a/connect.h
+++ b/connect.h
@@ -2,6 +2,7 @@
 #define CONNECT_H
 
 #define CONNECT_VERBOSE       (1u << 0)
+#define CONNECT_DIAG_URL      (1u << 1)
 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 extern int finish_connect(struct child_process *conn);
 extern int git_connection_is_socket(struct child_process *conn);

diff --git a/fetch-pack.h b/fetch-pack.h
index 461cbf39b2affa71e27dd1a95c24d6c65a938d62..20ccc12e57b9499b0716c8295b4adea38d8d2a86 100644 (file)
--- a/fetch-pack.h
+++ b/fetch-pack.h
@@ -14,6 +14,7 @@ struct fetch_pack_args {
                use_thin_pack:1,
                fetch_all:1,
                stdin_refs:1,
+               diag_url:1,
                verbose:1,
                no_progress:1,
                include_tag:1,