view convert-repo @ 249:619e775aa7f9

import and startup cleanups

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import and startup cleanups

add commands:run()
add copyright notice to commands
eliminate/reorganize imports to speed up start time:

0.5b:
$ time bash -c 'for i in `seq 100`; do ~/bin/hg > /dev/null; done'

real    0m7.718s
user    0m6.719s
sys     0m0.794s

new:

$ time bash -c 'for i in `seq 100`; do hg > /dev/null; done' 
real    0m2.171s
user    0m1.684s
sys     0m0.444s

just python:

$ time bash -c 'for i in `seq 100`; do python -c pass; done' 
real    0m0.988s
user    0m0.771s
sys     0m0.207s

Ignoring the fixed cost of loading the Python interpreter, we're 5.6
times faster. With the Python load time, we're still 3.5 times faster.

manifest hash: acce5882a55c76eb165316f5741724c8ce4ef587
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#!/usr/bin/env python
import sys, os, sha, base64, re
from mercurial import hg

ui = hg.ui()
repo = hg.repository(ui=ui)
known = {}

def encodepath(path):
    s = sha.sha(path).digest()
    s = base64.encodestring(s)[:-3]
    s = re.sub("\+", "%", s)
    s = re.sub("/", "_", s)
    return s

for i in range(repo.changelog.count()):
    n = repo.changelog.node(i)
    changes = repo.changelog.read(n)
    for f in changes[3]:
        known[f] = 1

try:
    os.mkdir(".hg/data-new")
except:
    pass

files = known.keys()
files.sort()
for f in files:
    pb = ".hg/data/" + encodepath(f)
    pn = ".hg/data-new/" + f
    print f
    try:
        file(pn+".i", "w").write(file(pb+"i").read())
    except:
        os.makedirs(os.path.dirname(pn))
        # we actually copy the files to get nice disk layout
        file(pn+".i", "w").write(file(pb+"i").read())

    file(pn+".d", "w").write(file(pb).read())

os.rename(".hg/data", ".hg/data-old")
os.rename(".hg/data-new", ".hg/data")