view hgext/churn.py @ 8846:b30775386d40

acl: support for getting authenticated user from web server (issue298)

Previously, the acl extension just read the current system user, which
is fine for direct file system access and SSH, but will not work for
HTTP(S) as that would return the web server process user identity
rather than the authenticated user. An empty user is returned if the
user is not authenticated.

# churn.py - create a graph of revisions count grouped by template
#
# Copyright 2006 Josef "Jeff" Sipek <[e-mail]>
# Copyright 2008 Alexander Solovyov <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.

'''command to show certain statistics about revision history'''

from mercurial.i18n import _
from mercurial import patch, cmdutil, util, templater
import sys, os
import time, datetime

def maketemplater(ui, repo, tmpl):
    tmpl = templater.parsestring(tmpl, quoted=False)
    try:
        t = cmdutil.changeset_templater(ui, repo, False, None, None, False)
    except SyntaxError, inst:
        raise util.Abort(inst.args[0])
    t.use_template(tmpl)
    return t

def changedlines(ui, repo, ctx1, ctx2, fns):
    lines = 0
    fmatch = cmdutil.match(repo, pats=fns)
    diff = ''.join(patch.diff(repo, ctx1.node(), ctx2.node(), fmatch))
    for l in diff.split('\n'):
        if (l.startswith("+") and not l.startswith("+++ ") or
            l.startswith("-") and not l.startswith("--- ")):
            lines += 1
    return lines

def countrate(ui, repo, amap, *pats, **opts):
    """Calculate stats"""
    if opts.get('dateformat'):
        def getkey(ctx):
            t, tz = ctx.date()
            date = datetime.datetime(*time.gmtime(float(t) - tz)[:6])
            return date.strftime(opts['dateformat'])
    else:
        tmpl = opts.get('template', '{author|email}')
        tmpl = maketemplater(ui, repo, tmpl)
        def getkey(ctx):
            ui.pushbuffer()
            tmpl.show(ctx)
            return ui.popbuffer()

    count = pct = 0
    rate = {}
    df = False
    if opts.get('date'):
        df = util.matchdate(opts['date'])

    get = util.cachefunc(lambda r: repo[r].changeset())
    changeiter, matchfn = cmdutil.walkchangerevs(ui, repo, pats, get, opts)
    for st, rev, fns in changeiter:
        if not st == 'add':
            continue
        if df and not df(get(rev)[2][0]): # doesn't match date format
            continue

        ctx = repo[rev]
        key = getkey(ctx)
        key = amap.get(key, key) # alias remap
        if opts.get('changesets'):
            rate[key] = rate.get(key, 0) + 1
        else:
            parents = ctx.parents()
            if len(parents) > 1:
                ui.note(_('Revision %d is a merge, ignoring...\n') % (rev,))
                continue

            ctx1 = parents[0]
            lines = changedlines(ui, repo, ctx1, ctx, fns)
            rate[key] = rate.get(key, 0) + lines

        if opts.get('progress'):
            count += 1
            newpct = int(100.0 * count / max(len(repo), 1))
            if pct < newpct:
                pct = newpct
                ui.write("\r" + _("generating stats: %d%%") % pct)
                sys.stdout.flush()

    if opts.get('progress'):
        ui.write("\r")
        sys.stdout.flush()

    return rate


def churn(ui, repo, *pats, **opts):
    '''histogram of changes to the repository

    This command will display a histogram representing the number
    of changed lines or revisions, grouped according to the given
    template. The default template will group changes by author.
    The --dateformat option may be used to group the results by
    date instead.

    Statistics are based on the number of changed lines, or
    alternatively the number of matching revisions if the
    --changesets option is specified.

    Examples:

      # display count of changed lines for every committer
      hg churn -t '{author|email}'

      # display daily activity graph
      hg churn -f '%H' -s -c

      # display activity of developers by month
      hg churn -f '%Y-%m' -s -c

      # display count of lines changed in every year
      hg churn -f '%Y' -s

    It is possible to map alternate email addresses to a main address
    by providing a file using the following format:

    <alias email> <actual email>

    Such a file may be specified with the --aliases option, otherwise a
    .hgchurn file will be looked for in the working directory root.
    '''
    def pad(s, l):
        return (s + " " * l)[:l]

    amap = {}
    aliases = opts.get('aliases')
    if not aliases and os.path.exists(repo.wjoin('.hgchurn')):
        aliases = repo.wjoin('.hgchurn')
    if aliases:
        for l in open(aliases, "r"):
            l = l.strip()
            alias, actual = l.split()
            amap[alias] = actual

    rate = countrate(ui, repo, amap, *pats, **opts).items()
    if not rate:
        return

    sortfn = ((not opts.get('sort')) and (lambda a, b: cmp(b[1], a[1])) or None)
    rate.sort(sortfn)

    maxcount = float(max([v for k, v in rate]))
    maxname = max([len(k) for k, v in rate])

    ttywidth = util.termwidth()
    ui.debug(_("assuming %i character terminal\n") % ttywidth)
    width = ttywidth - maxname - 2 - 6 - 2 - 2

    for date, count in rate:
        print "%s %6d %s" % (pad(date, maxname), count,
                             "*" * int(count * width / maxcount))


cmdtable = {
    "churn":
        (churn,
         [('r', 'rev', [], _('count rate for the specified revision or range')),
          ('d', 'date', '', _('count rate for revisions matching date spec')),
          ('t', 'template', '{author|email}', _('template to group changesets')),
          ('f', 'dateformat', '',
              _('strftime-compatible format for grouping by date')),
          ('c', 'changesets', False, _('count rate by number of changesets')),
          ('s', 'sort', False, _('sort by key (default: sort by count)')),
          ('', 'aliases', '', _('file with email aliases')),
          ('', 'progress', None, _('show progress'))],
         _("hg churn [-d DATE] [-r REV] [--aliases FILE] [--progress] [FILE]")),
}