cpython/Tools/scripts/eptags.py at pythoncapi · pythoncapi/cpython · GitHub

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#! /usr/bin/env python3

"""Create a TAGS file for Python programs, usable with GNU Emacs.

usage: eptags pyfiles...

The output TAGS file is usable with Emacs version 18, 19, 20.

Tagged are:

- functions (even inside other defs or classes)

- classes

eptags warns about files it cannot open.

eptags will not give warnings about duplicate tags.

BUGS:

Because of tag duplication (methods with the same name in different

classes), TAGS files are not very useful for most object-oriented

python projects.

"""

import sys,re

expr = r'^[ \t]*(def|class)[ \t]+([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*[:\(]'

matcher = re.compile(expr)

def treat_file(filename, outfp):

"""Append tags found in file named 'filename' to the open file 'outfp'"""

try:

fp = open(filename, 'r')

except OSError:

sys.stderr.write('Cannot open %s\n'%filename)

return

charno = 0

lineno = 0

tags = []

size = 0

while 1:

line = fp.readline()

if not line:

break

lineno = lineno + 1

m = matcher.search(line)

if m:

tag = m.group(0) + '\177%d,%d\n' % (lineno, charno)

tags.append(tag)

size = size + len(tag)

charno = charno + len(line)

outfp.write('\f\n%s,%d\n' % (filename,size))

for tag in tags:

outfp.write(tag)

def main():

outfp = open('TAGS', 'w')

for filename in sys.argv[1:]:

treat_file(filename, outfp)

if __name__=="__main__":

main()

cpython/Tools/scripts/eptags.py at pythoncapi · pythoncapi/cpython · GitHub

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