#!/usr/bin/env python
#
# Count statistics about SCons test and source files.  This must be run
# against a fully-populated tree (for example, one that's been freshly
# checked out).
#
# A test file is anything under the src/ directory that ends in
# 'Tests.py', or anything under the test/ directory that ends in '.py'.
#
# A source file is anything under the src/engine/ or src/script/
# directories that ends in '.py' but does NOT end in 'Tests.py'.  (We
# should probably ignore the stuff in src/engine/SCons/Optik, since it
# doesn't originate with SCons, but what the hell.)
#
# We report the number of tests and sources, the total number of lines
# in each category, the number of non-blank lines, and the number of
# non-comment lines.  The last figure (non-comment) lines is the most
# interesting one for most purposes.
#

import os.path
import string

tests = []
sources = []

def t(arg, dirname, names):
    names = filter(lambda n: n[-8:] == 'Tests.py', names)
    arg.extend(map(lambda n, d=dirname: os.path.join(d, n), names))
os.path.walk('src', t, tests)

def p(arg, dirname, names):
    names = filter(lambda n: n[-3:] == '.py', names)
    arg.extend(map(lambda n, d=dirname: os.path.join(d, n), names))
os.path.walk('test', p, tests)

def s(arg, dirname, names):
    names = filter(lambda n: n[-3:] == '.py' and n[-8:] != 'Tests.py', names)
    arg.extend(map(lambda n, d=dirname: os.path.join(d, n), names))
os.path.walk('src/engine', s, sources)
os.path.walk('src/script', s, sources)

def gather(files):
    lines = []
    for file in files:
        lines.extend(open(file).readlines())
    return lines

tlines = map(string.lstrip, gather(tests))
slines = map(string.lstrip, gather(sources))

nbtl = filter(lambda x: x != '', tlines)
nbsl = filter(lambda x: x != '', slines)

nctl = filter(lambda x: x[0] != '#', nbtl)
ncsl = filter(lambda x: x[0] != '#', nbsl)

fmt = "%-8s  %12s  %12s  %12s  %12s"

print fmt % ('', 'files', 'lines', 'non-blank', 'non-comment')
print fmt % ('tests:', len(tests), len(tlines), len(nbtl), len(nctl))
print fmt % ('sources:', len(sources), len(slines), len(nbsl), len(ncsl))