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author | Lars Wirzenius <liw@liw.fi> | 2009-08-07 22:39:42 +0300 |
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committer | Lars Wirzenius <liw@liw.fi> | 2009-08-07 22:39:42 +0300 |
commit | 107801a5fd8adc50c11ac1f17d078358a2c9a311 (patch) | |
tree | e792af975a7dd211a4a45920c3830af2e458be8a | |
parent | 721028c921e56e3126cbf94b95a11d4f279c0fdb (diff) | |
parent | fa7ad45397845730f6c623830f98196101d815f4 (diff) | |
download | extrautils-107801a5fd8adc50c11ac1f17d078358a2c9a311.tar.gz |
Merged implementation of minimify command.
-rwxr-xr-x | minimify | 71 | ||||
-rw-r--r-- | minimify.1 | 33 |
2 files changed, 104 insertions, 0 deletions
diff --git a/minimify b/minimify new file mode 100755 index 0000000..c4985cf --- /dev/null +++ b/minimify @@ -0,0 +1,71 @@ +#!/usr/bin/python +# +# minimify -- compress file to smallest size +# Copyright (C) 2009 Lars Wirzenius +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + + +import multiprocessing +import optparse +import os +import subprocess +import tempfile + + +COMPRESSORS = ( + ('gzip', '.gz'), + ('bzip2', '.bz2'), + ('lzma', '.lzma'), +) + + +def parse_args(): + parser = optparse.OptionParser() + options, filenames = parser.parse_args() + return options, filenames + + +def run_compressor(t): + compressor, filename, suffix, options = t + input_f = file(filename) + fd, name = tempfile.mkstemp(dir=os.path.dirname(filename)) + p = subprocess.Popen([compressor], stdin=input_f, stdout=fd) + p.communicate('') + os.close(fd) + if p.returncode: + raise Exception('Compression program %s failed' % p.returncode) + os.rename(name, filename + suffix) + return os.path.getsize(filename + suffix), filename + suffix + + +def compress(filename, options): + args = [(compressor, filename, suffix, options) + for compressor, suffix in COMPRESSORS] + pool = multiprocessing.Pool() + sizes = sorted(pool.map(run_compressor, args)) + for size, pathname in sizes[1:]: + os.remove(pathname) + return sizes[0] + + +def main(): + options, filenames = parse_args() + for filename in filenames: + size, name = compress(filename, options) + print size, name + + +if __name__ == "__main__": + main() diff --git a/minimify.1 b/minimify.1 new file mode 100644 index 0000000..0e9a4b3 --- /dev/null +++ b/minimify.1 @@ -0,0 +1,33 @@ +.\" minimify.1 - manual page for the minimify command +.\" Copyright (C) 2009 Lars Wirzenius +.\" +.\" This program is free software: you can redistribute it and/or modify +.\" it under the terms of the GNU General Public License as published by +.\" the Free Software Foundation, either version 3 of the License, or +.\" (at your option) any later version. +.\" +.\" This program is distributed in the hope that it will be useful, +.\" but WITHOUT ANY WARRANTY; without even the implied warranty of +.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +.\" GNU General Public License for more details. +.\" +.\" You should have received a copy of the GNU General Public License +.\" along with this program. If not, see <http://www.gnu.org/licenses/>. +.\" +.TH MINIMIFY 1 +.SH NAME +minimify \- compress file to minimal size +.SH SYNOPSIS +.BR minimify +.IR file ... +.SH DESCRIPTION +.B minimify +compresses a file using different compression programs and picks the +smallest output. +Note that this can be extremely slow. +.PP +The following compression programs are supported: +.BR gzip , +.BR bzip2 , +and +.BR lzma . |