#!/usr/bin/env python
from __future__ import with_statement
'''get repository information for use in a shell prompt
Take a string, parse any special variables inside, and output the result.
Useful mostly for putting information about the current repository into
a shell prompt.
'''
import re
import os
import subprocess
from datetime import datetime, timedelta
from os import path
from mercurial import extensions, commands
from mercurial.node import hex, short
CACHE_PATH = ".hg/prompt/cache"
CACHE_TIMEOUT = timedelta(minutes=15)
def _cache_remote(repo, kind):
cache = path.join(repo.root, CACHE_PATH, kind)
c_tmp = cache + '.temp'
# This is kind of a hack and I feel a little bit dirty for doing it.
IGNORE = open('NUL:','w') if subprocess.mswindows else open('/dev/null','w')
subprocess.call(['hg', kind, '--quiet'], stdout=file(c_tmp, 'w'), stderr=IGNORE)
os.rename(c_tmp, cache)
return
def _with_groups(g, out):
if any(g) and not all(g):
print 'ERROR'
return ("%s" + out + "%s") % (g[0][:-1] if g[0] else '',
g[1][1:] if g[1] else '')
def prompt(ui, repo, fs='', **opts):
'''get repository information for use in a shell prompt
Take a string and output it for use in a shell prompt. You can use
keywords in curly braces:
$ hg prompt "currently on {branch}"
currently on default
You can also use an extended form of any keyword:
{optional text here{keyword}more optional text}
This will expand the inner {keyword} and output it along with the extra
text only if the {keyword} expands successfully. This is useful if you
have a keyword that may not always apply to the current state and you
have some text that you would like to see only if it is appropriate:
$ hg prompt "currently at {bookmark}"
currently at
$ hg prompt "{currently at {bookmark}}"
$ hg bookmark my-bookmark
$ hg prompt "{currently at {bookmark}}"
currently at my-bookmark
The following keywords are available:
- bookmark: the current bookmark (requires the bookmarks extension)
- branch: the current branch
- node: the (full) changeset hash of the current parent
- node|short: a short form of the changeset hash of the current parent
- node|merge: the (full) changeset hash of the changeset you're merging
with if you're currently merging, otherwise nothing.
- node|merge|short: a short form of the changeset hash of the changeset
you're merging with if you're currently merging, otherwise nothing
- rev: the repository-local changeset number of the current parent
- rev|merge: the repository-local changeset number of the changeset
you're merging with if you're currently merging, otherwise nothing
- root: the full path to the root of the current repository, without a
trailing slash
- root|basename: the directory name of the root of the current
repository. For example, if the repository is in '/home/u/myrepo'
then this keyword would expand to 'myrepo'.
- status: "!" if the current repository contains files that have been
modified, added, removed, or deleted, otherwise "?" if it contains
untracked (and not ignored) files, otherwise nothing.
- status|modified: "!" if the current repository contains files that
have been modified, added, removed, or deleted, otherwise nothing
- status|unknown: "?" if the current repository contains untracked
files, otherwise nothing
- status|modified|unknown: "!" if the current repository contains files
that have been modified, added, removed, or deleted, and "?" if it
contains untracked (and not ignored) files, otherwise nothing
- tags: the tags of the current parent, separated by a space
- tags|SEP: the tags of the current parent, separated by SEP
- task: the current task (requires the tasks extension)
- update: "^" if the current parent is not the tip of the current branch,
otherwise nothing. In effect, this lets you see if running
'hg update' would do something.
There are also several keywords that deal with the status of remote
repositories. They cache their results in .hg/prompt/cache/ and refresh
approximately every fifteen minutes to avoid overloading remote servers.
- incoming: this keyword prints nothing on its own. If the default
path contains incoming changesets the extra text will be expanded.
For example:
'{incoming changes{incoming}}' will expand to
'incoming changes' if there are changes, '' otherwise.
- incoming|count: the number of incoming changesets if greater than 0
- outgoing: this keyword prints nothing on its own. If the current
repository contains outgoing changesets (to default) the extra text
will be expanded. For example:
'{outgoing changes{outgoing}}' will expand to
'outgoing changes' if there are changes, '' otherwise.
- outgoing|count: the number of outgoing changesets if greater than 0
'''
def _branch(m):
branch = repo.dirstate.branch()
return _with_groups(m.groups(), branch) if branch else ''
def _status(m):
g = m.groups()
out_g = (g[0],) + (g[-1],)
st = repo.status(unknown=True)[:5]
modified = any(st[:4])
unknown = len(st[-1]) > 0
flag = ''
if '|modified' not in g and '|unknown' not in g:
flag = '!' if modified else '?' if unknown else ''
else:
if '|modified' in g:
flag += '!' if modified else ''
if '|unknown' in g:
flag += '?' if unknown else ''
return _with_groups(out_g, flag) if flag else ''
def _bookmark(m):
try:
book = extensions.find('bookmarks').current(repo)
return _with_groups(m.groups(), book) if book else ''
except KeyError:
return ''
def _tags(m):
g = m.groups()
out_g = (g[0],) + (g[-1],)
sep = g[1][1:] if g[1] else ' '
tags = repo[None].tags()
return _with_groups(out_g, sep.join(tags)) if tags else ''
def _task(m):
try:
task = extensions.find('tasks').current(repo)
return _with_groups(m.groups(), task) if task else ''
except KeyError:
return ''
def _root(m):
return _with_groups(m.groups(), repo.root) if repo.root else ''
def _basename(m):
return _with_groups(m.groups(), path.basename(repo.root)) if repo.root else ''
def _update(m):
curr = repo[None].parents()[0]
to = repo[repo.branchtags()[curr.branch()]]
return _with_groups(m.groups(), '^') if curr != to else ''
def _rev(m):
g = m.groups()
out_g = (g[0],) + (g[-1],)
parents = repo[None].parents()
p = 0 if '|merge' not in g else 1
p = p if len(parents) > p else None
rev = parents[p].rev() if p is not None else None
return _with_groups(out_g, str(rev)) if rev else ''
def _node(m):
g = m.groups()
out_g = (g[0],) + (g[-1],)
parents = repo[None].parents()
p = 0 if '|merge' not in g else 1
p = p if len(parents) > p else None
format = short if '|short' in g else hex
node = format(parents[p].node()) if p is not None else None
return _with_groups(out_g, str(node)) if node else ''
def _remote(kind):
def _r(m):
g = m.groups()
out_g = (g[0],) + (g[-1],)
cache_dir = path.join(repo.root, CACHE_PATH)
cache = path.join(cache_dir, kind)
if not path.isdir(cache_dir):
os.makedirs(cache_dir)
cache_exists = path.isfile(cache)
cache_time = (datetime.fromtimestamp(os.stat(cache).st_mtime)
if cache_exists else None)
if not cache_exists or cache_time < datetime.now() - CACHE_TIMEOUT:
if not cache_exists:
open(cache, 'w').close()
subprocess.Popen(['hg', 'prompt', '--cache-%s' % kind])
if cache_exists:
with open(cache) as c:
count = len(c.readlines())
if g[1]:
return _with_groups(out_g, str(count)) if count else ''
else:
return _with_groups(out_g, '') if count else ''
else:
return ''
return _r
tag_start = r'\{([^{}]*?\{)?'
tag_end = r'(\}[^{}]*?)?\}'
patterns = {
'bookmark': _bookmark,
'branch': _branch,
'node(?:(\|short)|(\|merge))*': _node,
'rev(\|merge)?': _rev,
'root': _root,
'root\|basename': _basename,
'status(?:(\|modified)|(\|unknown))*': _status,
'tags(\|[^}]*)?': _tags,
'task': _task,
'update': _update,
'incoming(\|count)?': _remote('incoming'),
'outgoing(\|count)?': _remote('outgoing'),
}
if opts.get("cache_incoming"):
_cache_remote(repo, 'incoming')
if opts.get("cache_outgoing"):
_cache_remote(repo, 'outgoing')
for tag, repl in patterns.items():
fs = re.sub(tag_start + tag + tag_end, repl, fs)
ui.status(fs)
def _pull_with_cache(orig, ui, repo, *args, **opts):
"""Wrap the pull command to delete the incoming cache as well."""
res = orig(ui, repo, *args, **opts)
cache = path.join(repo.root, CACHE_PATH, 'incoming')
if path.isfile(cache):
os.remove(cache)
return res
def _push_with_cache(orig, ui, repo, *args, **opts):
"""Wrap the push command to delete the outgoing cache as well."""
res = orig(ui, repo, *args, **opts)
cache = path.join(repo.root, CACHE_PATH, 'outgoing')
if path.isfile(cache):
os.remove(cache)
return res
def uisetup(ui):
extensions.wrapcommand(commands.table, 'pull', _pull_with_cache)
extensions.wrapcommand(commands.table, 'push', _push_with_cache)
cmdtable = {
"prompt":
(prompt, [
('', 'cache-incoming', None, 'used internally by hg-prompt'),
('', 'cache-outgoing', None, 'used internally by hg-prompt'),
],
'hg prompt STRING')
}