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#!/usr/bin/env python
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Runs 'gn help' and various subhelps, and spits out html.
# TODO:
# - Handle numbered and dashed lists -> <ol> <ul>. (See "os" and "toolchain").
# - Handle "Arguments:" blocks a bit better (the argument names could be
# distinguished).
# - Convert "|blahblah|" to <code>.
# - Spit out other similar formats like wiki, markdown, whatever.
import cgi
import subprocess
import sys
def GetOutput(*args):
try:
return subprocess.check_output([sys.argv[1]] + list(args))
except subprocess.CalledProcessError:
return ''
def ParseTopLevel(out):
commands = []
output = []
for line in out.splitlines():
if line.startswith(' '):
command, sep, rest = line.partition(':')
command = command.strip()
is_option = command.startswith('-')
output_line = ['<li>']
if not is_option:
commands.append(command)
output_line.append('<a href="#' + cgi.escape(command) + '">')
output_line.append(cgi.escape(command))
if not is_option:
output_line.append('</a>')
output_line.extend([sep + cgi.escape(rest) + '</li>'])
output.append(''.join(output_line))
else:
output.append('<h2>' + cgi.escape(line) + '</h2>')
return commands, output
def ParseCommand(command, out):
first_line = True
got_example = False
output = []
for line in out.splitlines():
if first_line:
name, sep, rest = line.partition(':')
name = name.strip()
output.append('<h3><a name="' + cgi.escape(command) + '">' +
cgi.escape(name + sep + rest) + '</a></h3>')
first_line = False
else:
if line.startswith('Example'):
# Special subsection that's pre-formatted.
if got_example:
output.append('</pre>')
got_example = True
output.append('<h4>Example</h4>')
output.append('<pre>')
elif not line.strip():
output.append('<p>')
elif not line.startswith(' ') and line.endswith(':'):
# Subsection.
output.append('<h4>' + cgi.escape(line[:-1]) + '</h4>')
else:
output.append(cgi.escape(line))
if got_example:
output.append('</pre>')
return output
def main():
if len(sys.argv) < 2:
print 'usage: help_as_html.py <gn_binary>'
return 1
header = '''<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body { font-family: Arial, sans-serif; font-size: small; }
pre { font-family: Consolas, monospace; font-size: small; }
#container { margin: 0 auto; max-width: 48rem; width: 90%; }
</style>
</head>
<body>
<div id="container"><h1>GN</h1>
'''
footer = '</div></body></html>'
commands, output = ParseTopLevel(GetOutput('help'))
for command in commands:
output += ParseCommand(command, GetOutput('help', command))
print header + '\n'.join(output) + footer
return 0
if __name__ == '__main__':
sys.exit(main())
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