view contrib/tmplrewrite.py @ 20275:2123d27ff75d

backout: avoid update on simple case.

Before the changeset the backout process was:
1) go to <target>
2) revert to <target> parent
3) update back to changeset we came from

The two update steps can takes a very long time to move back and forth unrelated
file change between <target> and current working directory.

The new process is just merging current working directory with the parent of
<target> using <target> as ancestor. This give the very same result but skip
the two updates. On big repo with a lot of files and changes that save a lots of
time (x20 for one week window).

The "merge" version (hg backout --merge) is still done with upgrades. We could
imagine using in memory commit to speed it up but this is another fish.

#!/usr/bin/python
import sys, os, re

IGNORE = ['.css', '.py']
oldre = re.compile('#([\w\|%]+)#')

def rewrite(fn):
    f = open(fn)
    new = open(fn + '.new', 'wb')
    for ln in f:
        new.write(oldre.sub('{\\1}', ln))
    new.close()
    f.close()
    os.rename(new.name, f.name)

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print 'usage: python tmplrewrite.py [file [file [file]]]'
    for fn in sys.argv[1:]:
        if os.path.splitext(fn) in IGNORE:
            continue
        print 'rewriting %s...' % fn
        rewrite(fn)