mirror of
https://github.com/wesnoth/wesnoth
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99 lines
3.8 KiB
Python
Executable File
99 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python
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"""\
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wmlindent - re-indent WML in a uniform way.
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By Eric S. Raymond, June 2007.
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Call with no arguments to filter WML on stdin to reindented WML on
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stdout. If arguments are specified, they are taken to be files to be
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re-indented in place; interrupting will be safe as each reindenting
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will be done to a copy that is atomically renamed when it's done. This
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code never modifies anything but leading whitespace on lines.
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The indent unit is four spaces. Absence of an option to change this is
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deliberate; the purpose of this tool is to *prevent* style wars, not encourage
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them.
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Note: This does not include a parser. It will produce bad results on WML
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that is syntactically unbalanced. Unbalanced double quotes that aren't part
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of a multiline literal will also confuse it. You will receive warnings
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oiif there's an indent open at end of file or if a closer occurs with
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indent already zero; these two conditions strongly suggest unbalanced WML.
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"""
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import sys, os, getopt
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def is_directive(str):
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"Identify things that shouldn't be indented."
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for prefix in ("#ifdef", "#else", "#endif", "#define", "#enddef"):
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if str.startswith(prefix):
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return True
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return False
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def reindent(name, infp, outfp):
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"Reindent WML."
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baseindent = " "
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dostrip = True
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indent = ""
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for line in infp:
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# Strip each line, unless we're in something like a multiline string.
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if dostrip:
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transformed = line.lstrip()
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else:
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transformed = line
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if transformed == "":
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transformed = "\n"
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# In the close case, we must compute new indent *before* emitting
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# the new line so the close tag will be at the same level as the
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# one that started the block.
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if transformed.startswith("[/"):
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if indent == "":
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print >>sys.stderr, "wmlindent: from %s, close tag with indent already zero." % name
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else:
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indent = indent[:-len(baseindent)]
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if dostrip and transformed and not is_directive(transformed):
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output = indent + transformed
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else:
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output = transformed
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outfp.write(output)
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# May need to indent based on the line we just saw.
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if transformed.startswith("[") and not transformed.startswith("[/"):
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indent += baseindent
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# Compute the dostrip state likewise. This is the only tricky part.
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# We look for unbalanced string quotes,
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syntax = transformed.split("#")[0]
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if "=" in syntax and syntax.count('"') == 1:
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dostrip = True
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elif syntax.count('"') == 1:
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dostrip = False
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if indent != "":
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print >>sys.stderr, "wmlindent: from %s, end of file with indent nonzero." % name
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def convertor(linefilter, filelist):
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"Apply a filter to command-line arguments."
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if not filelist:
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linefilter("standard input", sys.stdin, sys.stdout)
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else:
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for filename in filelist:
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try:
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infp = open(filename, "r")
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outfp = open(filename + ".out", "w")
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linefilter(filename, infp, outfp)
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infp.close()
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outfp.close()
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except KeyboardInterrupt:
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os.remove(filename + ".out")
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else:
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os.remove(filename) # For Windows portability
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# There's a tiny window here. It's unavoidable, because there's
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# no known way to do an atomic rename under Windows when the
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# target exists -- see Python manual 14.1.4::rename()
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os.rename(filename + ".out", filename)
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if __name__ == '__main__':
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(options, arguments) = getopt.getopt(sys.argv[1:], "h:")
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for (opt, val) in options:
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if opt == "-?":
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print __doc__
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convertor(lambda n, f1, f2: reindent(n, f1, f2), arguments)
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