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#! /usr/bin/env python3

"""Show file statistics by extension."""

import os

import sys

class Stats:

def __init__(self):

self.stats = {}

def statargs(self, args):

for arg in args:

if os.path.isdir(arg):

self.statdir(arg)

elif os.path.isfile(arg):

self.statfile(arg)

else:

sys.stderr.write("Can't find %s\n" % arg)

self.addstats("<???>", "unknown", 1)

def statdir(self, dir):

self.addstats("<dir>", "dirs", 1)

try:

names = os.listdir(dir)

except OSError as err:

sys.stderr.write("Can't list %s: %s\n" % (dir, err))

self.addstats("<dir>", "unlistable", 1)

return

for name in sorted(names):

if name.startswith(".#"):

continue # Skip CVS temp files

if name.endswith("~"):

continue # Skip Emacs backup files

full = os.path.join(dir, name)

if os.path.islink(full):

self.addstats("<lnk>", "links", 1)

elif os.path.isdir(full):

self.statdir(full)

else:

self.statfile(full)

def statfile(self, filename):

head, ext = os.path.splitext(filename)

head, base = os.path.split(filename)

if ext == base:

ext = "" # E.g. .cvsignore is deemed not to have an extension

ext = os.path.normcase(ext)

if not ext:

ext = "<none>"

self.addstats(ext, "files", 1)

try:

with open(filename, "rb") as f:

data = f.read()

except IOError as err:

sys.stderr.write("Can't open %s: %s\n" % (filename, err))

self.addstats(ext, "unopenable", 1)

return

self.addstats(ext, "bytes", len(data))

if b'\0' in data:

self.addstats(ext, "binary", 1)

return

if not data:

self.addstats(ext, "empty", 1)

# self.addstats(ext, "chars", len(data))

lines = str(data, "latin-1").splitlines()

self.addstats(ext, "lines", len(lines))

del lines

words = data.split()

self.addstats(ext, "words", len(words))

def addstats(self, ext, key, n):

d = self.stats.setdefault(ext, {})

d[key] = d.get(key, 0) + n

def report(self):

exts = sorted(self.stats)

# Get the column keys

columns = {}

for ext in exts:

columns.update(self.stats[ext])

cols = sorted(columns)

colwidth = {}

colwidth["ext"] = max(map(len, exts))

minwidth = 6

self.stats["TOTAL"] = {}

for col in cols:

total = 0

cw = max(minwidth, len(col))

for ext in exts:

value = self.stats[ext].get(col)

if value is None:

w = 0

else:

w = len("%d" % value)

total += value

cw = max(cw, w)

cw = max(cw, len(str(total)))

colwidth[col] = cw

self.stats["TOTAL"][col] = total

exts.append("TOTAL")

for ext in exts:

self.stats[ext]["ext"] = ext

cols.insert(0, "ext")

def printheader():

for col in cols:

print("%*s" % (colwidth[col], col), end=' ')

print()

printheader()

for ext in exts:

for col in cols:

value = self.stats[ext].get(col, "")

print("%*s" % (colwidth[col], value), end=' ')

print()

printheader() # Another header at the bottom

def main():

args = sys.argv[1:]

if not args:

args = [os.curdir]

s = Stats()

s.statargs(args)

s.report()

if __name__ == "__main__":

main()