Init project

Author: phpusr

.gitignore

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+/.idea/

Pipfile

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+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+django-compressor = "*"
+requests = "*"
+
+[requires]
+python_version = "3.8"

Pipfile.lock

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+#!/usr/bin/env python3
+
+import requests
+# src: https://developers.google.com/closure/compiler/?csw=1
+# online: https://closure-compiler.appspot.com/home
+# compilation_level: WHITESPACE_ONLY, SIMPLE_OPTIMIZATIONS, ADVANCED_OPTIMIZATIONS
+# API reference: https://developers.google.com/closure/compiler/docs/api-ref
+import sys
+
+URL = 'https://closure-compiler.appspot.com/compile'
+COMPILATION_LEVEL = 'SIMPLE_OPTIMIZATIONS'
+"""WHITESPACE_ONLY, SIMPLE_OPTIMIZATIONS, ADVANCED_OPTIMIZATIONS"""
+OUTPUT_FORMAT = 'json'
+
+
+class ParseError(Exception):
+    def __init__(self, errors):
+        self.errors = errors
+
+
+def minify(text):
+    data = dict(
+        js_code=text,
+        compilation_level=COMPILATION_LEVEL,
+        output_format=OUTPUT_FORMAT,
+        output_info='errors'
+    )
+    response = requests.post(URL, data).json()
+    errors = response.get('errors')
+    if errors:
+        raise ParseError(errors=errors)
+
+    data['output_info'] = 'compiled_code'
+    response = requests.post(URL, data).json()
+
+    return response['compiledCode']
+
+
+def main(argv):
+    js_code = ''
+
+    if argv:
+        for file_path in argv:
+            with open(file_path) as file:
+                js_code += file.read()
+    elif sys.stdin:
+        for line in sys.stdin:
+            js_code += line
+
+    print(minify(js_code))
+
+
+if __name__ == '__main__':
+    main(sys.argv[1:])

compiler.py

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+from compressor.filters import CallbackOutputFilter
+
+
+class GoogleClosureCompileFilter(CallbackOutputFilter):
+    dependencies = ['requests']
+    callback = 'google_closure_online_compile_filter.compiler.minify'

filters.py

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+import unittest
+
+import compiler
+
+ERROR_JS_CODE = '''
+fun hello() {
+    conso.log()
+}
+'''
+
+GOOD_JS_CODE = '''
+function hello() {
+    console.log('hello')
+}
+'''
+
+
+class TestCompiler(unittest.TestCase):
+
+    def test_minify(self):
+        with self.assertRaises(compiler.ParseError) as cm:
+            compiler.minify(ERROR_JS_CODE)
+
+        errors = cm.exception.errors
+        self.assertTrue(len(errors), 1)
+        self.assertTrue(errors[0]['type'], 'JSC_PARSE_ERROR')
+
+    def test_minify_good(self):
+        minify_code = compiler.minify(GOOD_JS_CODE)
+        self.assertTrue(minify_code, 'function hello(){console.log()};')