2014-09-21 17:43:21 +00:00
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#!/usr/bin/python3
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#
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# Generate documentation for how this machine works by
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# parsing our bash scripts!
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import cgi, re
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import markdown
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from modgrammar import *
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def generate_documentation():
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print("""<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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<meta name="viewport" content="width=device-width">
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<title>Build Your Own Mail Server From Scratch</title>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
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<style>
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@import url(https://fonts.googleapis.com/css?family=Iceland);
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@import url(https://fonts.googleapis.com/css?family=Raleway:400,700);
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@import url(https://fonts.googleapis.com/css?family=Ubuntu:300,500);
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body {
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font-family: Raleway, sans-serif;
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font-size: 16px;
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color: #555;
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}
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h2, h3 {
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margin-top: .25em;
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margin-bottom: .75em;
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2014-09-21 17:43:21 +00:00
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}
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p {
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margin-bottom: 1em;
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}
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2014-10-04 21:57:26 +00:00
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.intro p {
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margin: 1.5em 0;
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}
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li {
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margin-bottom: .33em;
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}
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.sourcefile {
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padding-top: 1.5em;
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padding-bottom: 1em;
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font-size: 90%;
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text-align: right;
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}
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.sourcefile a {
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color: red;
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}
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.instructions .row.contd {
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border-top: 1px solid #E0E0E0;
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}
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.prose {
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padding-top: 1em;
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padding-bottom: 1em;
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}
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.terminal {
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background-color: #EEE;
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padding-top: 1em;
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padding-bottom: 1em;
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}
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2014-09-21 17:43:21 +00:00
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2014-10-13 14:00:26 +00:00
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ul {
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padding-left: 1.25em;
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}
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pre {
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color: black;
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border: 0;
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background: none;
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font-size: 100%;
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}
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div.write-to {
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margin: 0 0 1em .5em;
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}
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div.write-to p {
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padding: .5em;
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margin: 0;
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}
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div.write-to .filename {
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padding: .25em .5em;
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background-color: #666;
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color: white;
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font-family: monospace;
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font-weight: bold;
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}
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div.write-to .filename span {
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font-family: sans-serif;
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font-weight: normal;
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}
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div.write-to pre {
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margin: 0;
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padding: .5em;
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border: 1px solid #999;
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border-radius: 0;
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font-size: 90%;
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}
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pre.shell > div:before {
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content: "$ ";
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color: #666;
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}
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2014-09-21 17:43:21 +00:00
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</style>
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</head>
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<body>
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<div class="container">
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<div class="row intro">
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<div class="col-xs-12">
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<h1>Build Your Own Mail Server From Scratch</h1>
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2014-10-04 21:57:26 +00:00
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<p>Here’s how you can build your own mail server from scratch.</p>
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<p>This document is generated automatically from <a href="https://mailinabox.email">Mail-in-a-Box</a>’s setup script <a href="https://github.com/mail-in-a-box/mailinabox">source code</a>.</p>
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<hr>
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</div>
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</div>
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<div class="container instructions">
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""")
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parser = Source.parser()
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for line in open("setup/start.sh"):
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try:
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fn = parser.parse_string(line).filename()
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except:
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continue
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if fn in ("setup/start.sh", "setup/preflight.sh", "setup/questions.sh", "setup/firstuser.sh", "setup/management.sh"):
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continue
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import sys
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print(fn, file=sys.stderr)
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print(BashScript.parse(fn))
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print("""
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
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<script>
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$(function() {
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$('.terminal').each(function() {
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$(this).outerHeight( $(this).parent().innerHeight() );
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});
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})
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</script>
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</body>
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</html>
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""")
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class HashBang(Grammar):
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grammar = (L('#!'), REST_OF_LINE, EOL)
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def value(self):
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return ""
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def strip_indent(s):
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s = s.replace("\t", " ")
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lines = s.split("\n")
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try:
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min_indent = min(len(re.match(r"\s*", line).group(0)) for line in lines if len(line) > 0)
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except ValueError:
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# No non-empty lines.
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min_indent = 0
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lines = [line[min_indent:] for line in lines]
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return "\n".join(lines)
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class Comment(Grammar):
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grammar = ONE_OR_MORE(ZERO_OR_MORE(SPACE), L('#'), REST_OF_LINE, EOL)
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def value(self):
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if self.string.replace("#", "").strip() == "":
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return "\n"
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lines = [x[2].string for x in self[0]]
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content = "\n".join(lines)
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content = strip_indent(content)
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return markdown.markdown(content, output_format="html4") + "\n\n"
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FILENAME = WORD('a-z0-9-/.')
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class Source(Grammar):
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grammar = ((L('.') | L('source')), L(' '), FILENAME, Comment | EOL)
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def filename(self):
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return self[2].string.strip()
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def value(self):
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return BashScript.parse(self.filename())
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class CatEOF(Grammar):
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grammar = (ZERO_OR_MORE(SPACE), L('cat '), L('>') | L('>>'), L(' '), ANY_EXCEPT(WHITESPACE), L(" <<"), OPTIONAL(SPACE), L("EOF"), EOL, REPEAT(ANY, greedy=False), EOL, L("EOF"), EOL)
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def value(self):
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content = self[9].string
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content = re.sub(r"\\([$])", r"\1", content) # un-escape bash-escaped characters
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return "<div class='write-to'><div class='filename'>%s <span>(%s)</span></div><pre>%s</pre></div>\n" \
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% (self[4].string,
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"overwrite" if ">>" not in self[2].string else "append to",
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cgi.escape(content))
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class HideOutput(Grammar):
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grammar = (L("hide_output "), REF("BashElement"))
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def value(self):
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return self[1].value()
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class EchoLine(Grammar):
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grammar = (OPTIONAL(SPACE), L("echo "), REST_OF_LINE, EOL)
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def value(self):
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if "|" in self.string or ">" in self.string:
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return "<pre class='shell'><div>" + recode_bash(self.string.strip()) + "</div></pre>\n"
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return ""
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class EditConf(Grammar):
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grammar = (
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L('tools/editconf.py '),
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FILENAME,
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SPACE,
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OPTIONAL((LIST_OF(
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L("-w") | L("-s") | L("-c ;"),
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sep=SPACE,
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), SPACE)),
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REST_OF_LINE,
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OPTIONAL(SPACE),
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EOL
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)
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def value(self):
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conffile = self[1]
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options = []
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eq = "="
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if self[3] and "-s" in self[3].string: eq = " "
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for opt in re.split("\s+", self[4].string):
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k, v = opt.split("=", 1)
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v = re.sub(r"\n+", "", fixup_tokens(v)) # not sure why newlines are getting doubled
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options.append("%s%s%s" % (k, eq, v))
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return "<div class='write-to'><div class='filename'>" + self[1].string + " <span>(change settings)</span></div><pre>" + "\n".join(cgi.escape(s) for s in options) + "</pre></div>\n"
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class CaptureOutput(Grammar):
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grammar = OPTIONAL(SPACE), WORD("A-Za-z_"), L('=$('), REST_OF_LINE, L(")"), OPTIONAL(L(';')), EOL
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def value(self):
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cmd = self[3].string
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cmd = cmd.replace("; ", "\n")
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return "<div class='write-to'><div class='filename'>$" + self[1].string + "=</div><pre>" + cgi.escape(cmd) + "</pre></div>\n"
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class SedReplace(Grammar):
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grammar = OPTIONAL(SPACE), L('sed -i "s/'), OPTIONAL(L('^')), ONE_OR_MORE(WORD("-A-Za-z0-9 #=\\{};.*$_!()")), L('/'), ONE_OR_MORE(WORD("-A-Za-z0-9 #=\\{};.*$_!()")), L('/"'), SPACE, FILENAME, EOL
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def value(self):
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return "<div class='write-to'><div class='filename'>edit<br>" + self[8].string + "</div><p>replace</p><pre>" + cgi.escape(self[3].string.replace(".*", ". . .")) + "</pre><p>with</p><pre>" + cgi.escape(self[5].string.replace("\\n", "\n").replace("\\t", "\t")) + "</pre></div>\n"
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class EchoPipe(Grammar):
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grammar = OPTIONAL(SPACE), L("echo "), REST_OF_LINE, L(' | '), REST_OF_LINE, EOL
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def value(self):
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text = " ".join("\"%s\"" % s for s in self[2].string.split(" "))
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return "<pre class='shell'><div>echo " + recode_bash(text) + " \<br> | " + recode_bash(self[4].string) + "</div></pre>\n"
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def shell_line(bash):
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return "<pre class='shell'><div>" + recode_bash(bash.strip()) + "</div></pre>\n"
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class AptGet(Grammar):
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grammar = (ZERO_OR_MORE(SPACE), L("apt_install "), REST_OF_LINE, EOL)
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def value(self):
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return shell_line("apt-get install -y " + re.sub(r"\s+", " ", self[2].string))
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class UfwAllow(Grammar):
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grammar = (ZERO_OR_MORE(SPACE), L("ufw_allow "), REST_OF_LINE, EOL)
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def value(self):
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return shell_line("ufw allow " + self[2].string)
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class RestartService(Grammar):
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grammar = (ZERO_OR_MORE(SPACE), L("restart_service "), REST_OF_LINE, EOL)
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def value(self):
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return shell_line("service " + self[2].string + " restart")
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class OtherLine(Grammar):
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grammar = (REST_OF_LINE, EOL)
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def value(self):
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if self.string.strip() == "": return ""
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if "source setup/functions.sh" in self.string: return ""
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if "source /etc/mailinabox.conf" in self.string: return ""
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return "<pre class='shell'><div>" + recode_bash(self.string.strip()) + "</div></pre>\n"
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class BashElement(Grammar):
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2014-10-13 14:00:26 +00:00
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grammar = Comment | CatEOF | EchoPipe | EchoLine | HideOutput | EditConf | SedReplace | AptGet | UfwAllow | RestartService | OtherLine
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2014-09-21 17:43:21 +00:00
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def value(self):
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return self[0].value()
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2014-10-04 21:57:26 +00:00
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# Make some special characters to private use Unicode code points.
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2014-10-13 14:00:26 +00:00
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bash_special_characters1 = {
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2014-10-04 21:57:26 +00:00
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"\n": "\uE000",
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" ": "\uE001",
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}
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2014-10-13 14:00:26 +00:00
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bash_special_characters2 = {
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"$": "\uE010",
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}
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bash_escapes = {
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"n": "\uE020",
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"t": "\uE021",
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}
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2014-10-04 21:57:26 +00:00
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def quasitokenize(bashscript):
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# Make a parse of bash easier by making the tokenization easy.
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newscript = ""
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quote_mode = None
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escape_next = False
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line_comment = False
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subshell = 0
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for c in bashscript:
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if line_comment:
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# We're in a comment until the end of the line.
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newscript += c
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if c == '\n':
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line_comment = False
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elif escape_next:
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# Previous character was a \. Normally the next character
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# comes through literally, but escaped newlines are line
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2014-10-13 14:00:26 +00:00
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# continuations and some escapes are for special characters
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# which we'll recode and then turn back into escapes later.
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2014-10-04 21:57:26 +00:00
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if c == "\n":
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c = " "
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2014-10-13 14:00:26 +00:00
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elif c in bash_escapes:
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c = bash_escapes[c]
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newscript += c
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2014-10-04 21:57:26 +00:00
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escape_next = False
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elif c == "\\":
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# Escaping next character.
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escape_next = True
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elif quote_mode is None and c in ('"', "'"):
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# Starting a quoted word.
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quote_mode = c
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elif c == quote_mode:
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# Ending a quoted word.
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quote_mode = None
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2014-10-13 14:00:26 +00:00
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elif quote_mode is not None and quote_mode != "EOF" and c in bash_special_characters1:
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2014-10-04 21:57:26 +00:00
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# Replace special tokens within quoted words so that they
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# don't interfere with tokenization later.
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2014-10-13 14:00:26 +00:00
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newscript += bash_special_characters1[c]
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2014-10-04 21:57:26 +00:00
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elif quote_mode is None and c == '#':
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# Start of a line comment.
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newscript += c
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line_comment = True
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elif quote_mode is None and c == ';' and subshell == 0:
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# End of a statement.
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newscript += "\n"
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elif quote_mode is None and c == '(':
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# Start of a subshell.
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newscript += c
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subshell += 1
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elif quote_mode is None and c == ')':
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# End of a subshell.
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newscript += c
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subshell -= 1
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elif quote_mode is None and c == '\t':
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# Make these just spaces.
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if newscript[-1] != " ":
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newscript += " "
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2014-10-13 14:00:26 +00:00
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elif quote_mode is None and c == ' ':
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# Collapse consecutive spaces.
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if newscript[-1] != " ":
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newscript += " "
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elif c in bash_special_characters2:
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newscript += bash_special_characters2[c]
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2014-10-04 21:57:26 +00:00
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else:
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# All other characters.
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newscript += c
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# "<< EOF" escaping.
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if quote_mode is None and re.search("<<\s*EOF\n$", newscript):
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quote_mode = "EOF"
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elif quote_mode == "EOF" and re.search("\nEOF\n$", newscript):
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quote_mode = None
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return newscript
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2014-10-13 14:00:26 +00:00
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def recode_bash(s):
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def requote(tok):
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tok = tok.replace("\\", "\\\\")
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for c in bash_special_characters2:
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tok = tok.replace(c, "\\" + c)
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tok = fixup_tokens(tok)
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if " " in tok or '"' in tok:
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tok = tok.replace("\"", "\\\"")
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tok = '"' + tok +'"'
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else:
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tok = tok.replace("'", "\\'")
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return tok
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return cgi.escape(" ".join(requote(tok) for tok in s.split(" ")))
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2014-10-04 21:57:26 +00:00
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def fixup_tokens(s):
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2014-10-13 14:00:26 +00:00
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for c, enc in bash_special_characters1.items():
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s = s.replace(enc, c)
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for c, enc in bash_special_characters2.items():
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2014-10-04 21:57:26 +00:00
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s = s.replace(enc, c)
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2014-10-13 14:00:26 +00:00
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for esc, c in bash_escapes.items():
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s = s.replace(c, "\\" + esc)
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2014-10-04 21:57:26 +00:00
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return s
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2014-09-21 17:43:21 +00:00
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class BashScript(Grammar):
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grammar = (OPTIONAL(HashBang), REPEAT(BashElement))
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def value(self):
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return [line.value() for line in self[1]]
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@staticmethod
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def parse(fn):
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if fn in ("setup/functions.sh", "/etc/mailinabox.conf"): return ""
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string = open(fn).read()
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2014-10-04 21:57:26 +00:00
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# tokenize
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2014-09-21 17:43:21 +00:00
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string = re.sub(".* #NODOC\n", "", string)
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2014-10-13 14:00:26 +00:00
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string = re.sub("\n\s*if .*then.*|\n\s*fi|\n\s*else|\n\s*elif .*", "", string)
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2014-10-04 21:57:26 +00:00
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string = quasitokenize(string)
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2014-09-21 17:43:21 +00:00
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string = re.sub("hide_output ", "", string)
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2014-10-04 21:57:26 +00:00
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parser = BashScript.parser()
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2014-09-21 17:43:21 +00:00
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result = parser.parse_string(string)
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2014-10-04 21:57:26 +00:00
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v = "<div class='row'><div class='col-xs-12 sourcefile'>view the bash source for the following section at <a href=\"%s\">%s</a></div></div>\n" \
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% ("https://github.com/mail-in-a-box/mailinabox/tree/master/" + fn, fn)
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mode = 0
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for item in result.value():
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if item.strip() == "":
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pass
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elif item.startswith("<p") and not item.startswith("<pre"):
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clz = ""
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if mode == 2:
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v += "</div>\n" # col
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v += "</div>\n" # row
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mode = 0
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clz = "contd"
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if mode == 0:
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v += "<div class='row %s'>\n" % clz
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v += "<div class='col-md-6 prose'>\n"
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v += item
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mode = 1
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elif item.startswith("<h"):
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if mode != 0:
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v += "</div>\n" # col
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v += "</div>\n" # row
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v += "<div class='row'>\n"
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v += "<div class='col-md-6 header'>\n"
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v += item
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v += "</div>\n" # col
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v += "<div class='col-md-6 terminal'> </div>\n"
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v += "</div>\n" # row
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mode = 0
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else:
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if mode == 0:
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v += "<div class='row'>\n"
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v += "<div class='col-md-offset-6 col-md-6 terminal'>\n"
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elif mode == 1:
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v += "</div>\n"
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v += "<div class='col-md-6 terminal'>\n"
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mode = 2
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v += item
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v += "</div>\n" # col
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v += "</div>\n" # row
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v = fixup_tokens(v)
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2014-09-21 17:43:21 +00:00
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2014-09-21 20:05:11 +00:00
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v = v.replace("</pre>\n<pre class='shell'>", "")
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2014-09-21 17:43:21 +00:00
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v = re.sub("<pre>([\w\W]*?)</pre>", lambda m : "<pre>" + strip_indent(m.group(1)) + "</pre>", v)
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2014-10-04 21:57:26 +00:00
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v = re.sub(r"(\$?)PRIMARY_HOSTNAME", r"<b>box.yourdomain.com</b>", v)
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v = re.sub(r"\$STORAGE_ROOT", r"<b>$STORE</b>", v)
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v = re.sub(r"\$CSR_COUNTRY", r"<b>US</b>", v)
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2014-09-21 17:43:21 +00:00
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v = v.replace("`pwd`", "<code><b>/path/to/mailinabox</b></code>")
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return v
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2014-09-21 20:05:11 +00:00
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def wrap_lines(text, cols=60):
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ret = ""
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words = re.split("(\s+)", text)
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linelen = 0
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for w in words:
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if linelen + len(w) > cols-1:
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ret += " \\\n"
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ret += " "
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linelen = 0
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if linelen == 0 and w.strip() == "": continue
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ret += w
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linelen += len(w)
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return ret
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2014-09-21 17:43:21 +00:00
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if __name__ == '__main__':
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generate_documentation()
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