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mailinabox/tools/readable_bash.py

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first pass at making readable documentation by parsing the bash scripts
2014-09-21 17:43:21 +00:00
#!/usr/bin/python3
#
# Generate documentation for how this machine works by
# parsing our bash scripts!
import cgi, re
import markdown
from modgrammar import *
def generate_documentation():
print("""<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width">
<title>Build Your Own Mail Server From Scratch</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
<style>
@import url(https://fonts.googleapis.com/css?family=Iceland);
@import url(https://fonts.googleapis.com/css?family=Raleway:400,700);
@import url(https://fonts.googleapis.com/css?family=Ubuntu:300,500);
body {
font-family: Raleway, sans-serif;
font-size: 16px;
color: #555;
}
h2, h3 {
margin-bottom: 1em;
}
p {
margin-bottom: 1em;
}
pre {
margin: 1em 1em 1.5em 1em;
color: black;
}
div.write-to {
margin: 1em;
border: 1px solid #999;
}
div.write-to p {
padding: .5em;
margin: 0;
}
div.write-to .filename {
background-color: #EEE;
padding: .5em;
font-weight: bold;
}
div.write-to pre {
padding: .5em;
margin: 0;
}
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pre.shell > div:before {
content: "$ ";
color: #666;
}
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</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-xs-12">
<h1>Build Your Own Mail Server From Scratch</h1>
<p>Here&rsquo;s how you can build your own mail server from scratch. This document is generated automatically from our setup script.</p>
<hr>
""")
parser = Source.parser()
for line in open("setup/start.sh"):
try:
fn = parser.parse_string(line).filename()
except:
continue
if fn in ("setup/preflight.sh", "setup/questions.sh", "setup/firstuser.sh", "setup/management.sh"):
continue
import sys
print(fn, file=sys.stderr)
print(BashScript.parse(fn))
print("""
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</body>
</html>
""")
class HashBang(Grammar):
grammar = (L('#!'), REST_OF_LINE, EOL)
def value(self):
return ""
def strip_indent(s):
lines = s.split("\n")
min_indent = min(len(re.match(r"\s*", line).group(0)) for line in lines if len(line) > 0)
lines = [line[min_indent:] for line in lines]
return "\n".join(lines)
class Comment(Grammar):
grammar = ONE_OR_MORE(ZERO_OR_MORE(SPACE), L('#'), REST_OF_LINE, EOL)
def value(self):
if self.string.replace("#", "").strip() == "":
return "\n"
lines = [x[2].string for x in self[0]]
content = "\n".join(lines)
content = strip_indent(content)
return markdown.markdown(content, output_format="html4") + "\n\n"
FILENAME = WORD('a-z0-9-/.')
class Source(Grammar):
grammar = ((L('.') | L('source')), L(' '), FILENAME, Comment | EOL)
def filename(self):
return self[2].string.strip()
def value(self):
return BashScript.parse(self.filename())
class CatEOF(Grammar):
grammar = (ZERO_OR_MORE(SPACE), L('cat > '), ANY_EXCEPT(WHITESPACE), L(" <<"), OPTIONAL(SPACE), L("EOF;"), EOL, REPEAT(ANY, greedy=False), EOL, L("EOF"), EOL)
def value(self):
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content = self[7].string
content = re.sub(r"\\([$])", r"\1", content) # un-escape bash-escaped characters
return "<div class='write-to'><div class='filename'>overwrite<br>" + self[2].string + "</div><pre>" + cgi.escape(content) + "</pre></div>\n"
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class HideOutput(Grammar):
grammar = (L("hide_output "), REF("BashElement"))
def value(self):
return self[1].value()
class SuppressedLine(Grammar):
grammar = (OPTIONAL(SPACE), L("echo "), REST_OF_LINE, EOL)
def value(self):
if "|" in self.string or ">" in self.string:
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return "<pre class='shell'><div>" + cgi.escape(self.string.strip()) + "</div></pre>\n"
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return ""
class EditConf(Grammar):
grammar = (
L('tools/editconf.py '),
FILENAME,
SPACE,
OPTIONAL((LIST_OF(
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L("-w") | L("-s") | L("-c ';'"),
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sep=SPACE,
), SPACE)),
REST_OF_LINE,
OPTIONAL(SPACE),
EOL
)
def value(self):
conffile = self[1]
options = [""]
mode = 1
for c in self[4].string:
if mode == 1 and c in (" ", "\t") and options[-1] != "":
# new word
options.append("")
elif mode < 0:
# escaped character
options[-1] += c
mode = -mode
elif c == "\\":
# escape next character
mode = -mode
elif mode == 1 and c == '"':
mode = 2
elif mode == 2 and c == '"':
mode = 1
else:
options[-1] += c
if options[-1] == "": options.pop(-1)
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return "<div class='write-to'><div class='filename'>additional settings for<br>" + self[1].string + "</div><pre>" + "\n".join(cgi.escape(s) for s in options) + "</pre></div>\n"
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class CaptureOutput(Grammar):
grammar = OPTIONAL(SPACE), WORD("A-Za-z_"), L('=$('), REST_OF_LINE, L(")"), OPTIONAL(L(';')), EOL
def value(self):
cmd = self[3].string
cmd = cmd.replace("; ", "\n")
return "<div class='write-to'><div class='filename'>$" + self[1].string + "=</div><pre>" + cgi.escape(cmd) + "</pre></div>\n"
class SedReplace(Grammar):
grammar = OPTIONAL(SPACE), L('sed -i "s/'), OPTIONAL(L('^')), ONE_OR_MORE(WORD("-A-Za-z0-9 #=\\{};.*$_!()")), L('/'), ONE_OR_MORE(WORD("-A-Za-z0-9 #=\\{};.*$_!()")), L('/"'), SPACE, FILENAME, EOL
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"
def shell_line(bash):
return "<pre class='shell'><div>" + cgi.escape(wrap_lines(bash.strip())) + "</div></pre>\n"
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class AptGet(Grammar):
grammar = (ZERO_OR_MORE(SPACE), L("apt_install "), REST_OF_LINE, EOL)
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):
grammar = (ZERO_OR_MORE(SPACE), L("ufw_allow "), REST_OF_LINE, EOL)
def value(self):
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return shell_line("ufw allow " + self[2].string)
class RestartService(Grammar):
grammar = (ZERO_OR_MORE(SPACE), L("restart_service "), REST_OF_LINE, EOL)
def value(self):
return shell_line("service " + self[2].string + " restart")
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class OtherLine(Grammar):
grammar = (REST_OF_LINE, EOL)
def value(self):
if self.string.strip() == "": return ""
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return "<pre class='shell'><div>" + cgi.escape(self.string.rstrip()) + "</div></pre>\n"
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class BashElement(Grammar):
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grammar = Comment | Source | CatEOF | SuppressedLine | HideOutput | EditConf | CaptureOutput | SedReplace | AptGet | UfwAllow | RestartService | OtherLine
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def value(self):
return self[0].value()
class BashScript(Grammar):
grammar = (OPTIONAL(HashBang), REPEAT(BashElement))
def value(self):
return [line.value() for line in self[1]]
@staticmethod
def parse(fn):
if fn in ("setup/functions.sh", "/etc/mailinabox.conf"): return ""
parser = BashScript.parser()
string = open(fn).read()
string = re.sub(r"\s*\\\n\s*", " ", string)
string = re.sub(".* #NODOC\n", "", string)
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string = re.sub("\n\s*if .*|\n\s*fi|\n\s*else|\n\s*elif .*", "", string)
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string = re.sub("hide_output ", "", string)
result = parser.parse_string(string)
v = "<div class='sourcefile'><a href=\"%s\">%s</a></div>\n" % ("https://github.com/mail-in-a-box/mailinabox/tree/master/" + fn, fn)
v += "".join(result.value())
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v = v.replace("</pre>\n<pre class='shell'>", "")
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v = re.sub("<pre>([\w\W]*?)</pre>", lambda m : "<pre>" + strip_indent(m.group(1)) + "</pre>", v)
v = re.sub(r"\$?PRIMARY_HOSTNAME", "<b>box.yourdomain.com</b>", v)
v = re.sub(r"\$?STORAGE_ROOT", "<code><b>/path/to/user-data</b></code>", v)
v = v.replace("`pwd`", "<code><b>/path/to/mailinabox</b></code>")
return v
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def wrap_lines(text, cols=60):
ret = ""
words = re.split("(\s+)", text)
linelen = 0
for w in words:
if linelen + len(w) > cols-1:
ret += " \\\n"
ret += " "
linelen = 0
if linelen == 0 and w.strip() == "": continue
ret += w
linelen += len(w)
return ret
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if __name__ == '__main__':
generate_documentation()
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