[Pkg-python-debian-commits] r78 trunk: new example: 'dpkg --info' proof of concept implementation

[zack at bononia.it]

------------------------------------------------------------
revno: 78
committer: zack at bononia.it
branch nick: pkg-python-debian.debfile
timestamp: Sat 2007-07-14 20:56:21 +0200
message:
  new example: 'dpkg --info' proof of concept implementation
added:
  examples/debfile/dpkg-info.py
-------------- next part --------------
=== added file 'examples/debfile/dpkg-info.py'
--- a/examples/debfile/dpkg-info.py	1970-01-01 00:00:00 +0000
+++ b/examples/debfile/dpkg-info.py	2007-07-14 18:56:21 +0000
@@ -0,0 +1,45 @@
+#!/usr/bin/python
+
+""" (An approximation of) a 'dpkg --info' implementation relying on DebFile
+class. """
+
+import os
+import stat
+import string
+import sys
+
+import debfile
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        print "Usage: dpkg-info DEB"
+        sys.exit(1)
+    fname = sys.argv[1]
+
+    deb = debfile.DebFile(fname)
+    if deb.version == '2.0':
+        print ' new debian package, version %s.' % deb.version
+    print ' size %d bytes: control archive= %d bytes.' % (
+            os.stat(fname)[stat.ST_SIZE], deb['control.tar.gz'].size)
+    for fname in deb.control:   # print info about control part contents
+        content = deb.control[fname]
+        if not content:
+            continue
+        lines = content.split('\n')
+        ftype = ''
+        try:
+            if lines[0].startswith('#!'):
+                ftype = lines[0].split()[0]
+        except IndexError:
+            pass
+        print '  %d bytes, %d lines, %s, %s' % (len(content), len(lines),
+                fname, ftype)
+    for n, v in deb.debcontrol().iteritems(): # print DEBIAN/control fields
+        if n.lower() == 'description':  # increase indentation of long dsc
+            lines = v.split('\n')
+            shortDsc = lines[0]
+            longDsc = string.join(map(lambda l: ' ' + l, lines[1:]), '\n')
+            print ' %s: %s\n%s' % (n, shortDsc, longDsc)
+        else:
+            print ' %s: %s' % (n, v)
+