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www.mikescher.com/data/css_compress/compress.py

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#!/usr/bin/env python3
import sys
import os
from subprocess import call
import re
import subprocess
def findnext(str, start, chr):
depth = 0
for i in range(start, len(str)):
if (str[i] == chr): return i;
def findclose(str, start):
depth = 0
for i in range(start, len(str)):
if (str[i] == '{'): depth = depth+1;
if (str[i] == '}'): depth = depth-1;
if (depth == 0): return i;
def countnl(str, start, end):
cnt = 0
for i in range(start, end+1):
if (str[i] == '\n'): cnt = cnt+1;
return cnt;
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def comment_remover(text):
def replacer(match):
s = match.group(0)
if s.startswith('/'):
return " " # note: a space and not an empty string
else:
return s
pattern = re.compile(
r'//.*?$|/\*.*?\*/|\'(?:\\.|[^\\\'])*\'|"(?:\\.|[^\\"])*"',
re.DOTALL | re.MULTILINE
)
return re.sub(pattern, replacer, text)
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fsource = str.replace(sys.argv[1], '\\', '/') # scss
finput = str.replace(sys.argv[2], '\\', '/') # css
foutput = str.replace(sys.argv[3], '\\', '/') # min.css
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ftemp1 = '__temp_compresss_py_1.tmp.css';
ftemp2 = '__temp_compresss_py_2.tmp.css';
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print('======== INPUT ========');
print();
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print(fsource);
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print(finput);
print(foutput);
print();
print();
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print('======== DELETE OLD DATA ========');
if os.path.isfile(finput):
try:
os.remove(finput);
print(finput + ' deleted')
except e:
print(e)
else:
print(finput + ' does not exist')
if os.path.isfile(foutput):
try:
os.remove(foutput);
print(foutput + ' deleted')
except e:
print(e)
else:
print(foutput + ' does not exist')
print();
print();
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print('======== CALL SCSS ========');
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out = subprocess.run(['ruby', 'scss', '--style=expanded', '--no-cache', '--update', fsource + ':' + finput], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print('> scss.bat --style=expanded --no-cache --update ' + fsource + ':' + finput)
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print('STDOUT:')
print(out.stdout.decode('utf-8'))
print('STDERR:')
print(out.stderr.decode('utf-8'))
print('')
print('')
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print('======== CLEANUP COMMENTS ========');
with open(finput, 'r') as tf:
data1 = tf.read()
print(str(len(data1)) + ' characters read from ' + os.path.basename(finput))
data1 = comment_remover(data1)
print('Comments in css removed');
with open(ftemp1, "w") as tf:
tf.write(data1)
print(str(len(data1)) + ' characters written to ' + ftemp1)
print('')
print('')
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print('======== CALL YUI ========');
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out = subprocess.run(['java', '-jar', 'yuicompressor.jar', '--verbose', ftemp1, '-o', ftemp2], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print('> java -jar yuicompressor.jar --verbose "'+finput+'" -o "'+ftemp2+'"')
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print('STDOUT:');
print(out.stdout.decode('utf-8'))
print('STDERR:');
print(out.stderr.decode('utf-8'))
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print('')
print('')
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print('======== READ ========');
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with open(ftemp2, 'r') as tf:
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data = tf.read()
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print(str(len(data)) + ' characters read from ' + ftemp2)
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print('')
print('')
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print('======== REM ========');
try:
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os.remove(ftemp1);
print(ftemp1 + ' deleted')
os.remove(ftemp2);
print(ftemp2 + ' deleted')
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except e:
print(e)
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print('')
print('')
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print('======== REGEX ========');
data = re.sub(r'(\}*\})', '\g<1>\n', data);
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print('css data modified (1)')
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print('')
print('')
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print('======== MEDIA ========');
ins = []
for i in range(len(data)):
if data[i:].startswith('@media'):
copen = findnext(data, i, '{')
cclose = findclose(data, copen)
if (countnl(data, copen, cclose) == 0): continue;
ins.append( (copen+1, '\n\t') )
for i in range(copen+1, cclose):
if data[i] == '\n':
tp =(i+1, '\t')
ins.append( tp )
ins.append((cclose, '\n'))
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print('media query at idx:' + str(i) + ' formatted')
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for (l, c) in reversed(ins):
data = data[:l] + c + data[l:]
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print('')
print('')
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print('======== WRITE ========');
with open(foutput, "w") as tf:
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tf.write(data)
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print(str(len(data)) + ' characters written to ' + foutput)
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print('')
print('')
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print('======== REMOVE MAP ========');
if os.path.isfile(finput + '.map'):
try:
os.remove(finput + '.map');
print(finput + '.map' + ' deleted')
except e:
print(e)
else:
print(finput + '.map' + ' does not exist')
print('')
print('')
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print('Finished.')