mimic_repo

#!/usr/bin/env python2
#emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*- 
#ex: set sts=4 ts=4 sw=4 noet:
"""
 Simple script to simulate an annex repository given a list of files.

 Not sure why I wrote it in Python, since in bash it would be more natural and shorter ;)

 COPYRIGHT: Yaroslav Halchenko 2014

 LICENSE: MIT

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
"""

__author__ = 'Yaroslav Halchenko'
__copyright__ = 'Copyright (c) 2014 Yaroslav Halchenko'
__license__ = 'MIT'

import sys, os
import commands
import fileinput

i = 0
addurl = "http://some.example.com/prefix/"

def run_command(cmd):
    global i
    st, output = commands.getstatusoutput(cmd)
    if st != 0:
        raise RuntimeError("E: run of {cmd} failed with status={st} output={output}".format(**locals()))
    return st, output

def init_git_annex(path):
    if os.path.exists(path):
        raise RuntimeError("path {path} exists already".format(**locals()))
    run_command('mkdir -p {path}; cd {path}; git init; git annex init'.format(**locals()))
    print("I: initialized in {}".format(path))

def populate_git_annex(list_, path='.'):
    count = 0
    i = 0
    for l in fileinput.FileInput(list_, openhook=fileinput.hook_compressed):
            if not l: break
            i += 1
            items = l.rstrip().split(None, 3)
            s3filename = items[-1]
            if s3filename.endswith('/'):
                continue
            if not s3filename.startswith('s3://'):
                print "ERROR: %i:  %s is not starting with s3://" % (i, s3filename)
                import pdb; pdb.set_trace()
            # create a dummy file with content being just a filename
            filename_ = s3filename[5:]
            filename = os.path.join(path, filename_)
            dirname = os.path.dirname(filename)
            if not os.path.exists(dirname):
                os.makedirs(dirname)
            with open(filename, 'w') as fout:
                fout.write(filename)
            count += 1
            if not (i % 100):
                sys.stdout.write('.')
                sys.stdout.flush()#print("D: ran {cmd}. Got output {output}".format(**locals()))
            # TODO
            if addurl:
                # we need to add a url for each file, thus first we just annex add
                run_command('cd {path}; git annex add {filename_}'.format(**locals()))
                # and then add a bogus url
                url = addurl + filename_
                run_command('cd {path}; git annex addurl --relaxed --file={filename_} {url}'.format(**locals()))
    if not addurl:
        print()
        print("I: adding to annex {count} files after processing {i} lines".format(**locals()))
        run_command('cd {path}; git annex add  *'.format(**locals()))
    print("I: committing")
    run_command('cd {path}; git commit -m "final commit"'.format(**locals()))
    print "DONE. Created {} files".format(count)

def git_repack(path):
    print("Repacking {}".format(path))
    run_command("cd {path}; git repack -a -d -f --window=100".format(path=path))

def du(path):
    st, output = commands.getstatusoutput('du -sk {path}'.format(path=path))
    print "du for {path}: {output}".format(**locals())

if __name__ == '__main__':
    list_ = sys.argv[1]
    path = sys.argv[2]
    init_git_annex(path)
    populate_git_annex(list_, path)
    du(path)
    git_repack(path)
    du(path)

    # let's now clone
    run_command("git clone --no-hardlinks  {path} {path}.cloned".format(path=path))
    du(path+".cloned")