Refactor deb helpers: introduce PkgPolicy class

Create a new 'pkg' basemodule, intended to be re-used by the upcoming
rpm package helpers. Move some deb functionality to a new pkg.PkgPolicy
class, to be used as a base for different package types. Introduces
Deb-specific deb.DebianPkgPolicy.

1 files changed, 104 insertions, 0 deletions

diff --git a/gbp/pkg/__init__.py b/gbp/pkg/__init__.py
new file mode 100644
index 0000000..a3f02bc
--- /dev/null
+++ b/gbp/pkg/__init__.py
@@ -0,0 +1,104 @@
+# vim: set fileencoding=utf-8 :
+#
+# (C) 2006,2007 Guido Guenther <agx@sigxcpu.org>
+# (C) 2012 Intel Corporation <markus.lehtonen@linux.intel.com>
+#    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 2 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, write to the Free Software
+#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+"""Common functionality of the Debian/RPM package helpers"""
+
+import os
+import re
+import glob
+
+import gbp.log
+import gbp.command_wrappers as gbpc
+from gbp.errors import GbpError
+from gbp.command_wrappers import Command
+
+# compression types, extra options and extensions
+compressor_opts = { 'gzip'  : [ '-n', 'gz' ],
+                    'bzip2' : [ '', 'bz2' ],
+                    'lzma'  : [ '', 'lzma' ],
+                    'xz'    : [ '', 'xz' ] }
+
+# Map frequently used names of compression types to the internal ones:
+compressor_aliases = { 'bz2' : 'bzip2',
+                       'gz'  : 'gzip', }
+
+class PkgPolicy(object):
+    @classmethod
+    def is_valid_packagename(cls, name):
+        "Is this a valid package name?"
+        return cls.packagename_re.match(name)
+
+    @classmethod
+    def is_valid_upstreamversion(cls, version):
+        "Is this a valid upstream version number?"
+        return cls.upstreamversion_re.match(version)
+
+    @staticmethod
+    def get_compression(orig_file):
+        """
+        Given an orig file return the compression used
+
+        >>> PkgPolicy.get_compression("abc.tar.gz")
+        'gzip'
+        >>> PkgPolicy.get_compression("abc.tar.bz2")
+        'bzip2'
+        >>> PkgPolicy.get_compression("abc.tar.foo")
+        >>> PkgPolicy.get_compression("abc")
+        """
+        try:
+            ext = orig_file.rsplit('.',1)[1]
+        except IndexError:
+            return None
+        for (c, o) in compressor_opts.iteritems():
+            if o[1] == ext:
+                return c
+        return None
+
+    @staticmethod
+    def has_orig(orig_file, dir):
+        "Check if orig tarball exists in dir"
+        try:
+            os.stat( os.path.join(dir, orig_file) )
+        except OSError:
+            return False
+        return True
+
+    @staticmethod
+    def symlink_orig(orig_file, orig_dir, output_dir, force=False):
+        """
+        symlink orig tarball from orig_dir to output_dir
+        @return: True if link was created or src == dst
+                 False in case of error or src doesn't exist
+        """
+        orig_dir = os.path.abspath(orig_dir)
+        output_dir = os.path.abspath(output_dir)
+
+        if orig_dir == output_dir:
+            return True
+
+        src = os.path.join(orig_dir, orig_file)
+        dst = os.path.join(output_dir, orig_file)
+        if not os.access(src, os.F_OK):
+            return False
+        try:
+            if os.access(dst, os.F_OK) and force:
+                os.unlink(dst)
+            os.symlink(src, dst)
+        except OSError:
+            return False
+        return True
+