Mercurial, define my own template/keyword: hostname - mercurial

Question

I need a mercurail template/keyword "hostname" to get the name (or IP) of the computer where the repo is located. as far as i read the wiki, namely "Chapter 11. Customizing the output of Mercurial", hg help templates, and the web, I think it should be similar to the date keyword, dynamicly expanded. How can i define my own template/keyword?
Thank you verry much

Answer 1

The following extension should do the trick:
from mercurial import templatekw
testedwith = "3.5"
_ipname = None
def showipname(repo, ctx, templ, **args):
""":ipname: String. The hostname of the machine that the repository
resides on."""
import socket
global _ipname
if not _ipname:
_ipname = socket.gethostname()
return _ipname
def uisetup(ui):
templatekw.keywords["ipname"] = showipname
Then use (say):
hg log -r . -T '{node|short} at {ipname}\n'
Note that the value of socket.gethostname() may depend on your internet connectivity. If you need the value in /etc/hostname or something else that identifies your machine, use that method instead.
To use an extension, put it in a file, say ipnametempl.py somewhere, then add the following lines to your .hgrc:
[extensions]
ipnametempl=/path/to/ipnametempl.py
This can be either your user/global hgrc or the .hg/hgrc in your repository (the latter if you only want to enable it for a specific repository). See hg help hgrc to find out where the user/global hgrc files are on your system.

Answer 2

Either the repository is local to your machine (then you can get the absolute path via hg root) and query the name via the normal system tools. You can embed those also in your templates:
$ hg log -r. --template="{branch}-{rev} from $(hostname) running debian $(cat /etc/debian_version)"
trunk-22248 from MYHOSTNAME running debian 8.2
Or you know already the URL (remote path) in order to operate with it as you need to specify it as argument to hg pull/clone/outgoing/incoming
If the remote URL is not explicitly specified on the command line it is specified in your .hgrc in the [path] section. When there is a remote repository at all, then usually a default = URL is defined there.
If you need the URL printed, then install hooks for clone, pull and push (and maybe outgoing and incoming) which prints the $URL as available in those hooks - or maybe just the changegroup hook. Check http://hgbook.red-bean.com/read/handling-repository-events-with-hooks.html#sec:hook:changegroup and hg help config.