1 #! /usr/bin/env python 2 """Create a TAGS file for Python programs, usable with GNU Emacs. 3 4 usage: eptags pyfiles... 5 6 The output TAGS file is usable with Emacs version 18, 19, 20. 7 Tagged are: 8 - functions (even inside other defs or classes) 9 - classes 10 11 eptags warns about files it cannot open. 12 eptags will not give warnings about duplicate tags. 13 14 BUGS: 15 Because of tag duplication (methods with the same name in different 16 classes), TAGS files are not very useful for most object-oriented 17 python projects. 18 """ 19 import sys,re 20 21 expr = r'^[ \t]*(def|class)[ \t]+([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*[:\(]' 22 matcher = re.compile(expr) 23 24 def treat_file(filename, outfp): 25 """Append tags found in file named 'filename' to the open file 'outfp'""" 26 try: 27 fp = open(filename, 'r') 28 except: 29 sys.stderr.write('Cannot open %s\n'%filename) 30 return 31 charno = 0 32 lineno = 0 33 tags = [] 34 size = 0 35 while 1: 36 line = fp.readline() 37 if not line: 38 break 39 lineno = lineno + 1 40 m = matcher.search(line) 41 if m: 42 tag = m.group(0) + '\177%d,%d\n' % (lineno, charno) 43 tags.append(tag) 44 size = size + len(tag) 45 charno = charno + len(line) 46 outfp.write('\f\n%s,%d\n' % (filename,size)) 47 for tag in tags: 48 outfp.write(tag) 49 50 def main(): 51 outfp = open('TAGS', 'w') 52 for filename in sys.argv[1:]: 53 treat_file(filename, outfp) 54 55 if __name__=="__main__": 56 main() 57
