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

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#!/usr/bin/env python3
import sys
import os
import re
import subprocess
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def findnext(strdata, start, searchchr):
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depth = 0
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for i in range(start, len(strdata)):
if strdata[i] == searchchr: return i;
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def findclose(strdata, start):
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depth = 0
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for i in range(start, len(strdata)):
if strdata[i] == '{': depth = depth + 1;
if strdata[i] == '}': depth = depth - 1;
if depth == 0: return i;
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def countnl(strdata, start, end):
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cnt = 0
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for i in range(start, end + 1):
if strdata[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('/'):
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return " " # note: a space and not an empty string
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else:
return s
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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
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finput = str.replace(sys.argv[2], '\\', '/') # css
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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'
print('======== INPUT ========')
print()
print(fsource)
print(finput)
print(foutput)
print()
print()
print('======== DELETE OLD DATA ========')
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if os.path.isfile(finput):
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try:
os.remove(finput)
print(finput + ' deleted')
except:
print(sys.exc_info()[0])
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else:
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print(finput + ' does not exist')
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if os.path.isfile(foutput):
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try:
os.remove(foutput)
print(foutput + ' deleted')
except:
print(sys.exc_info()[0])
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else:
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print(foutput + ' does not exist')
print()
print()
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print('======== CALL SCSS ========')
out = subprocess.run(['ruby', 'scss', '--style=expanded', '--no-cache', '--update', fsource + ':' + finput],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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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 ========')
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with open(finput, 'r') as tf:
data1 = tf.read()
print(str(len(data1)) + ' characters read from ' + os.path.basename(finput))
data1 = comment_remover(data1)
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print('Comments in css removed')
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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 ========')
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 + '"')
print('STDOUT:')
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print(out.stdout.decode('utf-8'))
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print('STDERR:')
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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 ========')
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try:
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os.remove(ftemp1)
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print(ftemp1 + ' deleted')
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os.remove(ftemp2)
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print(ftemp2 + ' deleted')
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except:
print(sys.exc_info()[0])
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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 ========')
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ins = []
for i in range(len(data)):
if data[i:].startswith('@media'):
copen = findnext(data, i, '{')
cclose = findclose(data, copen)
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if countnl(data, copen, cclose) == 0: continue;
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ins.append((copen + 1, '\n\t'))
for i2 in range(copen + 1, cclose):
if data[i2] == '\n':
tp = (i2 + 1, '\t')
ins.append(tp)
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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 ========')
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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 ========')
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if os.path.isfile(finput + '.map'):
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try:
os.remove(finput + '.map')
print(finput + '.map' + ' deleted')
except Exception as e:
print(e)
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else:
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print(finput + '.map' + ' does not exist')
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print('')
print('')
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print('Finished.')