Added new command "patool repack".

doc/changelog.txt

@@ -5,6 +5,8 @@
   * Fix parsing of the "-v" short option.
   * Added new command "patool diff" to show differences between two
     archives.
+  * Added new command "patool repack" to repackage archives in another
+    format.
 
 0.7 "3000 Miles to Graceland" (released 8.3.2010)
 

doc/patool.1

@@ -17,7 +17,8 @@ patool - simple manager for file archives of various types
 .SH SYNOPSIS
  \fBpatool\fP (\fBextract\fP|\fBlist\fP|\fBtest\fP) [\fIoptions\fP] <\fIarchive-file\fP>...
  \fBpatool\fP \fBcreate\fP [\fIoptions\fP] <\fIarchive-file\fP> [\fIfiles\fP...]
- \fBpatool\fP \fBdiff\fP [\fIoptions\fP] <\fIarchive1\fP> <\fIarchive2\fP>
+ \fBpatool\fP \fBdiff\fP <\fIarchive1\fP> <\fIarchive2\fP>
+ \fBpatool\fP \fBrepack\fP <\fIarchive1\fP> <\fIarchive2\fP>
  \fBpatool\fP \fBformats\fP [\fIoptions\fP]
 .SH DESCRIPTION
 Various archive types can be created, extracted, tested and listed by
@@ -40,6 +41,7 @@ It relies on helper applications to handle those archive formats
   \fBpatool list package.deb\fP
   \fPpatool create --verbose myfiles.zip file1.txt dir/\fP
   \fBpatool diff release1.0.tar.gz release2.0.zip\fP
+  \fBpatool repack linux-2.6.33.tar.gz linux-2.6.33.tar.bz2\fP
 .SH COMMANDS
 Several commands and options are available.
 .SS \fBextract\fP
@@ -92,6 +94,11 @@ Show differences between two archives.
 .TP
 \fB\-\-help\fP
 Show help for this command.
+.SS \fBrepack\fP
+Repackage archive to a different format.
+.TP
+\fB\-\-help\fP
+Show help for this command.
 .SS \fBformats\fP
 Show all supported archive formats.
 .TP

doc/patool.txt

@@ -8,7 +8,8 @@ NAME
 SYNOPSIS
         patool (extract|list|test) [options] <archive-file>...
         patool create [options] <archive-file> [files...]
-        patool diff [options] <archive1> <archive2>
+        patool diff <archive1> <archive2>
+        patool repack <archive1> <archive2>
         patool formats [options]
 
 DESCRIPTION
@@ -33,6 +34,7 @@ EXAMPLES
          patool list package.deb
          patool create --verbose myfiles.zip file1.txt dir/
          patool diff release1.0.tar.gz release2.0.zip
+         patool repack linux-2.6.33.tar.gz linux-2.6.33.tar.bz2
 
 COMMANDS
        Several commands and options are available.
@@ -85,6 +87,11 @@ COMMANDS
 
        --help Show help for this command.
 
+   repack
+       Repackage archive to a different format.
+
+       --help Show help for this command.
+
    formats
        Show all supported archive formats.
 

patool

@@ -75,6 +75,11 @@ def diff (archive1, archive2):
     """Show differences between two archives."""
     return handle_archive(archive1, "diff", archive2)
 
+@baker.command
+def repack (archive1, archive2):
+    """Repackage one archive in another format."""
+    return handle_archive(archive1, "repack", archive2)
+
 @baker.command
 def formats ():
     """List supported and available archive formats."""

patoolib/__init__.py

@@ -441,6 +441,8 @@ def handle_archive (archive, command, *args, **kwargs):
     try:
         if command == "diff":
             res = _diff_archives(archive, args[0])
+        elif command == "repack":
+            res = _repack_archive(archive, args[0])
         else:
             _handle_archive(archive, command, *args, **kwargs)
             res = 0
@@ -457,15 +459,29 @@ def handle_archive (archive, command, *args, **kwargs):
 
 
 def _diff_archives (archive1, archive2):
+    """Show differences between two archives."""
     diff = util.find_program("diff")
     if not diff:
         raise util.PatoolError("diff(1) is required for showing archive differences, please install it")
     tmpdir1 = util.tmpdir()
     tmpdir2 = util.tmpdir()
     try:
-        dir1 = _handle_archive(archive1, 'extract', outdir=tmpdir1)
-        dir2 = _handle_archive(archive2, 'extract', outdir=tmpdir2)
-        return util.run([diff, "-BurN", dir1, dir2])
+        path1 = _handle_archive(archive1, 'extract', outdir=tmpdir1)
+        path2 = _handle_archive(archive2, 'extract', outdir=tmpdir2)
+        return util.run([diff, "-BurN", path1, path2])
     finally:
         shutil.rmtree(tmpdir1, onerror=util.log_error)
         shutil.rmtree(tmpdir2, onerror=util.log_error)
+
+
+def _repack_archive (archive1, archive2):
+    """Repackage an archive to a different format."""
+    tmpdir = util.tmpdir()
+    try:
+        _handle_archive(archive1, 'extract', outdir=tmpdir)
+        archive = os.path.abspath(archive2)
+        files = tuple(os.listdir(tmpdir))
+        os.chdir(tmpdir)
+        _handle_archive(archive, 'create', *files)
+    finally:
+        shutil.rmtree(tmpdir, onerror=util.log_error)

tests/__init__.py

@@ -131,6 +131,21 @@ def needs_program (program):
     return check_prog
 
 
+def needs_one_program (programs):
+    """Decorator skipping test if not one of given programs are available."""
+    def check_prog (f):
+        def newfunc (*args, **kwargs):
+            for program in programs:
+                if patoolib.util.find_program(program):
+                    break
+            else:
+                raise nose.SkipTest("None of programs %s available" % programs)
+            return f(*args, **kwargs)
+        newfunc.func_name = f.func_name
+        return newfunc
+    return check_prog
+
+
 def needs_codec (program, codec):
     """Decorator skipping test if given program codec is not available."""
     def check_prog (f):

tests/test_repack.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+# Copyright (C) 2010 Bastian Kleineidam
+#
+# 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 unittest
+import os
+import shutil
+import patoolib
+from tests import datadir, needs_program, needs_one_program
+
+class ArchiveRepackTest (unittest.TestCase):
+
+    @needs_program('diff')
+    @needs_one_program(('tar', 'star', '7z'))
+    @needs_one_program(('unzip', '7z'))
+    def test_repack (self):
+        archive1 = os.path.join(datadir, "t.tar")
+        tmpdir = patoolib.util.tmpdir()
+        try:
+            archive2 = os.path.join(tmpdir, "t.zip")
+            patoolib.handle_archive(archive1, "repack", archive2)
+            res = patoolib.handle_archive(archive1, "diff", archive2)
+        finally:
+            shutil.rmtree(tmpdir)
+        # both archives have the same data
+        self.assertEqual(res, 0)