hgext/churn.py
author Patrick Mezard <pmezard@gmail.com>
Sat, 22 Mar 2008 18:01:46 +0100
changeset 6348 f8feaa665319
parent 6223 contrib/churn.py@bab6c8f2bb1a
child 6421 ecde0baee570
permissions -rw-r--r--
Make churn an official extension
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# churn.py - create a graph showing who changed the most lines
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#
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# Copyright 2006 Josef "Jeff" Sipek <jeffpc@josefsipek.net>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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#
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#
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# Aliases map file format is simple one alias per line in the following
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# format:
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#
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# <alias email> <actual email>
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from mercurial.i18n import gettext as _
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from mercurial import mdiff, cmdutil, util, node
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import os, sys
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def get_tty_width():
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    if 'COLUMNS' in os.environ:
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        try:
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            return int(os.environ['COLUMNS'])
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        except ValueError:
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            pass
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    try:
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        import termios, array, fcntl
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        for dev in (sys.stdout, sys.stdin):
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            try:
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                fd = dev.fileno()
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                if not os.isatty(fd):
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                    continue
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                arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8)
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                return array.array('h', arri)[1]
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            except ValueError:
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                pass
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    except ImportError:
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        pass
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    return 80
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def __gather(ui, repo, node1, node2):
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    def dirtywork(f, mmap1, mmap2):
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        lines = 0
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        to = mmap1 and repo.file(f).read(mmap1[f]) or None
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        tn = mmap2 and repo.file(f).read(mmap2[f]) or None
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        diff = mdiff.unidiff(to, "", tn, "", f, f).split("\n")
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        for line in diff:
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            if not line:
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                continue # skip EOF
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            if line.startswith(" "):
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                continue # context line
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            if line.startswith("--- ") or line.startswith("+++ "):
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                continue # begining of diff
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            if line.startswith("@@ "):
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                continue # info line
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            # changed lines
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            lines += 1
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        return lines
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    ##
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    lines = 0
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    changes = repo.status(node1, node2, None, util.always)[:5]
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    modified, added, removed, deleted, unknown = changes
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    who = repo.changelog.read(node2)[1]
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    who = util.email(who) # get the email of the person
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    mmap1 = repo.manifest.read(repo.changelog.read(node1)[0])
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    mmap2 = repo.manifest.read(repo.changelog.read(node2)[0])
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    for f in modified:
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        lines += dirtywork(f, mmap1, mmap2)
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    for f in added:
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        lines += dirtywork(f, None, mmap2)
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    for f in removed:
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        lines += dirtywork(f, mmap1, None)
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    for f in deleted:
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        lines += dirtywork(f, mmap1, mmap2)
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    for f in unknown:
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        lines += dirtywork(f, mmap1, mmap2)
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    return (who, lines)
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def gather_stats(ui, repo, amap, revs=None, progress=False):
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    stats = {}
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    cl    = repo.changelog
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    if not revs:
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        revs = range(0, cl.count())
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    nr_revs = len(revs)
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    cur_rev = 0
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    for rev in revs:
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        cur_rev += 1 # next revision
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        node2    = cl.node(rev)
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        node1    = cl.parents(node2)[0]
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        if cl.parents(node2)[1] != node.nullid:
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            ui.note(_('Revision %d is a merge, ignoring...\n') % (rev,))
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            continue
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        who, lines = __gather(ui, repo, node1, node2)
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        # remap the owner if possible
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        if who in amap:
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            ui.note("using '%s' alias for '%s'\n" % (amap[who], who))
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            who = amap[who]
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        if not who in stats:
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            stats[who] = 0
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        stats[who] += lines
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        ui.note("rev %d: %d lines by %s\n" % (rev, lines, who))
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        if progress:
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            nr_revs = max(nr_revs, 1)
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            if int(100.0*(cur_rev - 1)/nr_revs) < int(100.0*cur_rev/nr_revs):
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                ui.write("\rGenerating stats: %d%%" % (int(100.0*cur_rev/nr_revs),))
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                sys.stdout.flush()
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    if progress:
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        ui.write("\r")
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        sys.stdout.flush()
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    return stats
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def churn(ui, repo, **opts):
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    "Graphs the number of lines changed"
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    def pad(s, l):
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        if len(s) < l:
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            return s + " " * (l-len(s))
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        return s[0:l]
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    def graph(n, maximum, width, char):
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        maximum = max(1, maximum)
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        n = int(n * width / float(maximum))
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        return char * (n)
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    def get_aliases(f):
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        aliases = {}
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        for l in f.readlines():
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            l = l.strip()
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            alias, actual = l.split(" ")
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            aliases[alias] = actual
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        return aliases
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    amap = {}
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    aliases = opts.get('aliases')
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    if aliases:
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        try:
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            f = open(aliases,"r")
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        except OSError, e:
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            print "Error: " + e
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            return
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        amap = get_aliases(f)
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        f.close()
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    revs = [int(r) for r in cmdutil.revrange(repo, opts['rev'])]
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    revs.sort()
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    stats = gather_stats(ui, repo, amap, revs, opts.get('progress'))
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    # make a list of tuples (name, lines) and sort it in descending order
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    ordered = stats.items()
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    if not ordered:
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        return
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    ordered.sort(lambda x, y: cmp(y[1], x[1]))
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    max_churn = ordered[0][1]
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    tty_width = get_tty_width()
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    ui.note(_("assuming %i character terminal\n") % tty_width)
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    tty_width -= 1
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    max_user_width = max([len(user) for user, churn in ordered])
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    graph_width = tty_width - max_user_width - 1 - 6 - 2 - 2
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    for user, churn in ordered:
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        print "%s %6d %s" % (pad(user, max_user_width),
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                             churn,
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                             graph(churn, max_churn, graph_width, '*'))
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cmdtable = {
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    "churn":
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    (churn,
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     [('r', 'rev', [], _('limit statistics to the specified revisions')),
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      ('', 'aliases', '', _('file with email aliases')),
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      ('', 'progress', None, _('show progress'))],
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    'hg churn [-r revision range] [-a file] [--progress]'),
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}