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Annotation of kupuMPIWG/tools/compress.py, revision 1.1

1.1     ! dwinter     1: #!/usr/bin/env python
        !             2: 
        !             3: """Remove comments, newlines and redundant whitespace from JavaScript code
        !             4: 
        !             5:     This reads all paths that were passed in as arguments on the command-line
        !             6:     and removes everything that is ignored by JavaScript. This makes that
        !             7:     the source isn't readable anymore (which I personally consider bad),
        !             8:     but also that less bytes have to be served by the server, scripts are
        !             9:     loaded faster and also that they're executed faster.
        !            10:     
        !            11:     WARNING: This script converts files in place! Original files will be
        !            12:     overwritten. Do *not* run this on a development version of your code,
        !            13:     since you won't be able to get them back into the original state. This
        !            14:     should be ran only by system administrators if they want to speed up
        !            15:     their setups.
        !            16: """
        !            17: 
        !            18: import sys, re
        !            19: 
        !            20: one_line_comment = re.compile(r'^\s*//.*$', re.M)
        !            21: trailing_comment = re.compile(r'//(\w|\s)*$', re.M)
        !            22: multi_line_comment = re.compile(r'^\s*/\*.*?\*/', re.M | re.S)
        !            23: whitespace_after_separator = re.compile(r';\s*', re.M | re.S)
        !            24: whitespace_after_opening_bracket = re.compile(r'{\s*', re.M | re.S)
        !            25: starting_whitespace = re.compile(r'^\s*', re.M | re.S)
        !            26: 
        !            27: def strip(data):
        !            28:     """Processes the data, removing comments and unecessary whitespace."""
        !            29:     data = one_line_comment.sub('', data)
        !            30:     data = trailing_comment.sub('', data)
        !            31:     data = multi_line_comment.sub('', data)
        !            32:     data = whitespace_after_separator.sub(';', data)
        !            33:     data = whitespace_after_opening_bracket.sub('{', data)
        !            34:     data = starting_whitespace.sub('', data)
        !            35:     return data.strip()
        !            36: 
        !            37: for file in sys.argv[1:]:
        !            38:     data = open(file).read()
        !            39:     data = strip(data)
        !            40:     open(file, 'w').write(data)