utility for comparing tags files

diff --git a/norm-tags.py b/norm-tags.py
new file mode 100755 (executable)
index 0000000..324cc52
--- /dev/null
+++ b/norm-tags.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python3.2
+#
+# perform comparison of tags contents between planet-lab and onelab tags
+#
+
+import sys
+import re
+from argparse import ArgumentParser
+import subprocess
+
+class TagsFile:
+    
+    def __init__ (self, filename):
+        self.filename=filename
+
+    m_comment =         re.compile('^\s*#')
+    m_empty =           re.compile('^\s*$')
+    m_gitpath =         re.compile(\
+        '^\s*(?P<module>[\w\.\-]+)-GITPATH\s*'+
+        ':=\s*git://(?P<host>[\w\.\-]+)/'+
+        '(?P<repo>[\w\.\-]+)(?P<tag>[@\w/:_\.\-]+)?\s*$')
+    m_svnpath =         re.compile(\
+        '^\s*(?P<module>[\w\-]+)-SVNPATH\s*'+
+        ':=\s*http://(?P<host>[\w\.\-]+)/'+
+        '(?P<svnpath>[\w/:_\.\-]+)\s*$')
+    m_branch =          re.compile(\
+        '^\s*(?P<module>[\w\.\-]+)-BRANCH\s*:=\s*(?P<branch>[\w]+)\s*$')
+
+    def _parse (self,o):
+        self.git={}
+        self.svn={}
+        self.branch={}
+        with open(self.filename) as i:
+            for line in i.readlines():
+                line=line.strip()
+                match=TagsFile.m_empty.match(line)
+                if match: continue
+                match=TagsFile.m_comment.match(line)
+                if match: continue
+                match=TagsFile.m_gitpath.match(line)
+                if match:
+                    (module,host,repo,tag)=match.groups()
+                    if tag: tag=tag.replace('@','')
+                    if module in self.git: print ('Warning: duplicate GITPATH for',module,file=o)
+                    self.git[module]=tag
+                    continue
+                match=TagsFile.m_svnpath.match(line)
+                if match:
+                    (module,host,svnpath)=match.groups()
+                    tag=svnpath.split('/')[-1]
+                    if module in self.svn: print ('Warning: duplicate SVNPATH for',module,file=o)
+                    self.svn[module]=tag
+                    continue
+                match=TagsFile.m_branch.match(line)
+                if match:
+                    (module,branch)=match.groups()
+                    if module in self.branch: print ('Warning: duplicate BRANCH for',module,file=o)
+                    self.branch[module]=branch
+                    continue
+                print ("%-020s"%"ignored",line,file=o)
+        # outputs relevant info
+        for n in ['branch','git','svn']:
+            d=getattr(self,n)
+            keys=list(d.keys())
+            keys.sort()
+            for key in keys: print ("%-020s %-20s %s"%(n,key,d[key]),file=o)
+
+    def norm(self): return self.filename+'.norm'
+                
+    def parse(self):
+        with open(self.norm(),'w') as f:
+            self._parse(f)
+        print ("(Over)wrote",self.norm())
+
+# basic usage for now 
+# $0 tagsfile1 tagsfile2
+def main ():
+    parser=ArgumentParser(description="Compare 2 tags files",
+                          epilog="Create a normalized (.norm) file for each input and runs diff on them")
+    parser.add_argument('tagsnames',
+                        metavar='tagsfile',
+                        nargs='+',
+                        help="tags file names")
+    parser.add_argument("-d","--diff",action="store_true",dest="run_diff",default=False,
+                        help="runs diff on the normalized outputs - requires exactly 2 args")
+
+    apres=parser.parse_args()
+    for tagsname in apres.tagsnames: 
+        TagsFile(tagsname).parse()
+    if apres.run_diff and len(apres.tagsnames)==2:
+        tf1=TagsFile(apres.tagsnames[0])
+        tf2=TagsFile(apres.tagsnames[1])
+        print ("%s <-- --> %s"%(tf1.norm(),tf2.norm()))
+        command = "diff %s %s"%(tf1.norm(),tf2.norm())
+        subprocess.Popen(command,shell=True)
+
+if __name__ == '__main__': 
+    main()