import re, sys
def main(from_tabs, to_tabs, fname):
"""
Usage sample:
> reindent 3 4 mms.py
processed mms.py, from 3 to 4 spaces. Output in mms.py.out.py.
Lines 317, empty 51, not matching indent 50, matching indent 216 (68.14 %).
"""
from_tabs, to_tabs = int(from_tabs), int(to_tabs)
fin = file(fname)
fout = file(fname + ".out.py", "w")
r1 = re.compile("^( *)[^ ]+")
cnt_rest=cnt_empty=0
tab_new = " " * to_tabs
for lnr, line in enumerate(fin):
m = r1.match(line)
spaces = len(m.groups()[0])
tabs = spaces // from_tabs
rest = spaces % from_tabs
if rest!=0:
cnt_rest+=1
content = line.lstrip()
if content:
fout.write(tab_new*tabs + " "*rest + content)
else:
cnt_empty+=1
fout.write(line)
cnt_match = (lnr+1-cnt_empty-cnt_rest)
print "processed %s, from %d to %d spaces. Output in %s.\nLines %d, empty %d, not matching indent %d, matching indent %d (%.2f %%)." % (
fname, from_tabs, to_tabs, fout.name, lnr+1, cnt_empty, cnt_rest, cnt_match, cnt_match/(lnr+1.0)*100.0)
if __name__=="__main__":
if len(sys.argv)!=4:
import os
print """Usage: %s tabs_from tabs_to fname""" % os.path.basename(sys.argv[0])
sys.exit(1)
main(*sys.argv[1:])
