remote-helpers: export GIT_DIR variable to helpers

The gitdir capability is recognized by git and can be used to tell
the helper where the .git directory is. But it is not mentioned in
the documentation and considered worse than if gitdir was passed
via GIT_DIR environment variable.

Remove support for the gitdir capability and export GIT_DIR instead.
Teach testgit to use env instead of the now-removed gitdir command.

[sr: fixed up documentation]

Signed-off-by: Dmitry Ivankov <divanorama@gmail.com>
Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-remote-helpers.txt b/Documentation/git-remote-helpers.txt
index 58f6ad4994dae770b1898888d3073fca777743af..18b8341f24b74ffba0dc6074255c01b4ab37f655 100644 (file)
--- a/Documentation/git-remote-helpers.txt
+++ b/Documentation/git-remote-helpers.txt
@@ -47,6 +47,9 @@ arguments. The first argument specifies a remote repository as in git;
 it is either the name of a configured remote or a URL. The second
 argument specifies a URL; it is usually of the form
 '<transport>://<address>', but any arbitrary string is possible.
+The 'GIT_DIR' environment variable is set up for the remote helper
+and can be used to determine where to store additional data or from
+which directory to invoke auxiliary git commands.
 
 When git encounters a URL of the form '<transport>://<address>', where
 '<transport>' is a protocol that it cannot handle natively, it

diff --git a/git-remote-testgit.py b/git-remote-testgit.py
index e4a99a33eff4affccb32ceac08296decf02cc8ec..b0c1e9b273a2763300eba3431eb001aa9cd75263 100644 (file)
--- a/git-remote-testgit.py
+++ b/git-remote-testgit.py
@@ -35,7 +35,7 @@ def get_repo(alias, url):
     prefix = 'refs/testgit/%s/' % alias
     debug("prefix: '%s'", prefix)
 
-    repo.gitdir = ""
+    repo.gitdir = os.environ["GIT_DIR"]
     repo.alias = alias
     repo.prefix = prefix
 
@@ -70,7 +70,6 @@ def do_capabilities(repo, args):
 
     print "import"
     print "export"
-    print "gitdir"
     print "refspec refs/heads/*:%s*" % repo.prefix
 
     print # end capabilities
@@ -150,22 +149,11 @@ def do_export(repo, args):
     repo.non_local.push(repo.gitdir)
 
 
-def do_gitdir(repo, args):
-    """Stores the location of the gitdir.
-    """
-
-    if not args:
-        die("gitdir needs an argument")
-
-    repo.gitdir = ' '.join(args)
-
-
 COMMANDS = {
     'capabilities': do_capabilities,
     'list': do_list,
     'import': do_import,
     'export': do_export,
-    'gitdir': do_gitdir,
 }
 
 

diff --git a/transport-helper.c b/transport-helper.c
index 34d18aaedaa084cfa4fb71fa0a1498d02a5149c7..6cccb20f8db98bdd040698e674dd3cec01021d65 100644 (file)
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -105,6 +105,12 @@ static struct child_process *get_helper(struct transport *transport)
        int refspec_alloc = 0;
        int duped;
        int code;
+       char git_dir_buf[sizeof(GIT_DIR_ENVIRONMENT) + PATH_MAX + 1];
+       const char *helper_env[] = {
+               git_dir_buf,
+               NULL
+       };
+
 
        if (data->helper)
                return data->helper;
@@ -120,6 +126,10 @@ static struct child_process *get_helper(struct transport *transport)
        helper->argv[2] = remove_ext_force(transport->url);
        helper->git_cmd = 0;
        helper->silent_exec_failure = 1;
+
+       snprintf(git_dir_buf, sizeof(git_dir_buf), "%s=%s", GIT_DIR_ENVIRONMENT, get_git_dir());
+       helper->env = helper_env;
+
        code = start_command(helper);
        if (code < 0 && errno == ENOENT)
                die("Unable to find remote helper for '%s'", data->name);
@@ -174,11 +184,6 @@ static struct child_process *get_helper(struct transport *transport)
                        refspecs[refspec_nr++] = strdup(buf.buf + strlen("refspec "));
                } else if (!strcmp(capname, "connect")) {
                        data->connect = 1;
-               } else if (!strcmp(buf.buf, "gitdir")) {
-                       struct strbuf gitdir = STRBUF_INIT;
-                       strbuf_addf(&gitdir, "gitdir %s\n", get_git_dir());
-                       sendline(data, &gitdir);
-                       strbuf_release(&gitdir);
                } else if (mandatory) {
                        die("Unknown mandatory capability %s. This remote "
                            "helper probably needs newer version of Git.\n",