IDEA: other repository sync methods

[Matt Mackall]

On Sat, Jun 11, 2005 at 01:42:08AM -0400, Andrew Thompson wrote:
> I was thinking that it might be useful to have a non-http based pull 
> mechanism. Digging in hg.py, I found that class remoterepository only 
> needs a few tweaks to be able to support this.
> 
> What I've done so far was easy, now I just have to figure out how to 
> reimplement the client/server communications. I was thinking of using 
> ssh to call a program that would accept a request and spit back a changeset.

My plan currently is to do http over other types of pipes.

The one I'm very close to implementing is the moral equivalent of:

ssh user at remotehost -L <rnd>:localhost:<rnd> 'cd <path>;hg serve -p
<rnd>' && hg pull http://localhost:<rnd>/

> First step patch attached.
> 
> Please let me know if this interests anyone else.

> # HG changeset patch
> # User Andrew Thompson <andrewkt at aktzero.com>
> # Node ID ab2705c8e42bc2f572e2d316f52635d401825e84
> # Parent  273f6a01d18b3459bbb24b1f393ccfd71900cf0b
> 
> Turn remoterepository into a base class. Create subclass httprepository using the do_cmds that was originally in remoterepository.
> 
> --- a/mercurial/hg.py	Fri Jun 10 22:10:07 2005
> +++ b/mercurial/hg.py	Sat Jun 11 04:34:07 2005
> @@ -1223,12 +1223,7 @@
>          self.ui = ui
>  
>      def do_cmd(self, cmd, **args):
> -        self.ui.debug("sending %s command\n" % cmd)
> -        q = {"cmd": cmd}
> -        q.update(args)
> -        qs = urllib.urlencode(q)
> -        cu = "%s?%s" % (self.url, qs)
> -        return urllib.urlopen(cu)
> +        raise NotImplementedError, "must be implemented in subclass"
>  
>      def heads(self):
>          d = self.do_cmd("heads").read()
> @@ -1272,11 +1267,20 @@
>              yield zd.decompress(d)
>          self.ui.note("%d bytes of data transfered\n" % bytes)
>  
> +class httprepository(remoterepository):
> +    def do_cmd(self, cmd, **args):
> +        self.ui.debug("sending %s command\n" % cmd)
> +        q = {"cmd": cmd}
> +        q.update(args)
> +        qs = urllib.urlencode(q)
> +        cu = "%s?%s" % (self.url, qs)
> +        return urllib.urlopen(cu)
> +
>  def repository(ui, path=None, create=0):
>      if path and path[:7] == "http://":
> -        return remoterepository(ui, path)
> +        return httprepository(ui, path)
>      if path and path[:5] == "hg://":
> -        return remoterepository(ui, path.replace("hg://", "http://"))
> +        return httprepository(ui, path.replace("hg://", "http://"))
>      if path and path[:11] == "old-http://":
>          return localrepository(ui, path.replace("old-http://", "http://"))
>      else:

Not bad, I'll think about it.

-- 
Mathematics is the supreme nostalgia of our time.