1 files changed, 15 insertions, 1 deletions
diff --git a/summain b/summain
index 2ff1b21..92ad5f3 100755
--- a/summain
+++ b/summain
@@ -32,6 +32,11 @@ class Summain(cliapp.Application):
         self.settings.string_list(['exclude'],
                               'do not output or compute FIELD',
                               metavar='FIELD')
+        self.settings.string_list(['checksum', 'c'],
+                                  'which checksums to compute: '
+                                  'MD5, SHA1, SHA224, SHA256, SHA384, SHA512; '
+                                  'use once per checksum type '
+                                  '(default is SHA1)')
 
     def files(self, root):
         if os.path.isdir(root):
@@ -50,9 +55,18 @@ class Summain(cliapp.Application):
             pn = summainlib.PathNormalizer()
         else:
             pn = summainlib.SamePath()
+        checksums = [x.upper() 
+                     for x in self.settings['checksum'] or ['SHA1']]
+        o = summainlib.FilesystemObject('.', nn, pn, exclude, checksums)
+        for checksum in checksums:
+            try:
+                o[checksum]
+            except KeyError:
+                raise cliapp.AppException('Unknown checksum %s' % checksum)
         for root in args:
             for filename in self.files(root):
-                o = summainlib.FilesystemObject(filename, nn, pn, exclude)
+                o = summainlib.FilesystemObject(filename, nn, pn, exclude,
+                                                checksums)
                 self.output.write(o.format(root if relative else None))
                 self.output.write('\n')