Another reorg, and pelican samples

author: Rob Austein <sra@hactrn.net> 2021-02-14 16:56:57 +0000
committer: Rob Austein <sra@hactrn.net> 2021-02-14 16:56:57 +0000
commit: 68e18ad1f44e9a6fab66adc38e97d027a58de8a4 (patch)
tree: 22eb915c53760c6b6f0f5254d027de9dee58abd1 /references
parent: 7bf10bb74babd8f16b7a3942607f3d1007aa2324 (diff)
9 files changed, 1040 insertions, 0 deletions
diff --git a/references/convert-and-slurp-attachments.sh b/references/convert-and-slurp-attachments.sh
new file mode 100755
index 0000000..ce7f34d
--- /dev/null
+++ b/references/convert-and-slurp-attachments.sh
@@ -0,0 +1,18 @@
+#!/bin/sh -
+
+ls | fgrep -v . |
+while read page
+do
+    base="https://trac.rpki.net"
+    path="/wiki/$(echo $page | sed s=%2F=/=g)"
+
+    # Fetch the Wiki page, extract the useful portion of the HTML, convert that into Markdown
+    curl "${base}${path}" |
+    xsltproc --html extract-wiki-content.xsl - |
+    html2markdown --no-skip-internal-links --reference-links >"$page.md"
+
+    # Fetch a ZIP file containing any attachments, clean up if result is empty or broken
+    curl "${base}/zip-attachment${path}/" >"$page.zip"
+    zipinfo "$page.zip" >/dev/null 2>&1 || rm -f "$page.zip"
+
+done
diff --git a/references/extract-wiki-content.xsl b/references/extract-wiki-content.xsl
new file mode 100644
index 0000000..e4376e8
--- /dev/null
+++ b/references/extract-wiki-content.xsl
@@ -0,0 +1,177 @@
+<!-- 
+ - XSL transform to extract useful content of a Trac Wiki page.
+ -
+ - Django generates weird HTML for ordered lists: it sometimes breaks
+ - up a single ordered list into multiple adjacent <ol/> elements,
+ - using the @start attribute to try to make the result look like a
+ - single ordered list.  This looks OK in Firefox but confuses the
+ - bejesus out of both html2markdown and htmldoc.  In some cases this is
+ - probably unavoidable, but most of the uses of this I've seen look
+ - gratuitous, and are probably the result of code modulararity issues
+ - in Django.
+ -
+ - So we try to clean this up, by merging adjacent <ol/> elements where
+ - we can.  The merge incantation is an adaptation of:
+ -
+ - http://stackoverflow.com/questions/1806123/merging-adjacent-nodes-of-same-type-xslt-1-0
+ -
+ - There may be a more efficient way to do this, but I don't think
+ - we care, and this seems to work.
+ -
+ - Original author's explanation:
+ -
+ - The rather convoluted XPath expression for selecting the following
+ - sibling aaa nodes which are merged with the current one:
+ -
+ - following-sibling::aaa[                       # following 'aaa' siblings
+ -   not(preceding-sibling::*[                   #   if they are not preceded by
+ -     not(self::aaa) and                        #     a non-'aaa' node
+ -     not(following-sibling::aaa = current())   #     after the current node
+ -   ])
+ - ]
+ -->
+
+  <xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+
+    <xsl:output method="xml" encoding="us-ascii" omit-xml-declaration="yes" />
+
+    <xsl:param name="basename"/>
+    <xsl:param name="path"/>
+
+    <xsl:template match="/">
+      <xsl:message><xsl:value-of select="concat('Got path: ', $path)"/></xsl:message>
+      <xsl:variable name="id">
+        <xsl:call-template name="path-to-id">
+          <xsl:with-param name="p" select="$path"/>
+        </xsl:call-template>
+      </xsl:variable>
+      <xsl:message><xsl:value-of select="concat('Got id: ', $id)"/></xsl:message>
+      <xsl:comment>NEW PAGE</xsl:comment>
+      <html>
+        <body>
+          <div id="{$id}">
+            <xsl:apply-templates select="//div[@id = 'wikipage']/*"/>
+          </div>
+        </body>
+      </html>
+    </xsl:template>
+
+    <xsl:template match="//div[contains(@class, 'wiki-toc')]"/>
+
+    <xsl:template match="//span[@class = 'icon' and not(*)]"/>
+
+    <xsl:template match="a[contains(@class, 'wiki') and
+                           starts-with(@href, '/wiki/')]">
+      <xsl:variable name="href">
+        <xsl:call-template name="path-to-id">
+          <xsl:with-param name="p" select="@href"/>
+        </xsl:call-template>
+      </xsl:variable>
+      <a href="#{$href}">
+        <xsl:apply-templates select="@*[name() != 'href']"/>
+        <xsl:apply-templates/>
+      </a>
+    </xsl:template>
+
+    <xsl:template match="a[starts-with(@href, '/attachment/wiki/')]">
+      <a href="{concat($basename, @href)}">
+        <xsl:apply-templates select="@*[name() != 'href']"/>
+        <xsl:apply-templates/>
+      </a>
+    </xsl:template>
+
+    <xsl:template match="img[starts-with(@src, '/raw-attachment/wiki/')]">
+      <img src="{concat($basename, @src)}">
+        <xsl:apply-templates select="@*[name() != 'src']"/>
+        <xsl:apply-templates/>
+      </img>
+    </xsl:template>
+
+    <xsl:template match="object[starts-with(@data, '/raw-attachment/wiki/') or
+                                starts-with(@data, '/graphviz/')]">
+      <object data="{concat($basename, @data)}">
+        <xsl:apply-templates select="@*[name() != 'data']"/>
+        <xsl:apply-templates/>
+      </object>
+    </xsl:template>
+
+    <xsl:template match="embed[starts-with(@src, '/raw-attachment/wiki/') or
+                               starts-with(@src, '/graphviz/')]">
+      <embed src="{concat($basename, @src)}">
+        <xsl:apply-templates select="@*[name() != 'src']"/>
+        <xsl:apply-templates/>
+      </embed>
+    </xsl:template>
+
+    <xsl:template match="text()[contains(., '&#8203;')]">
+      <xsl:call-template name="remove-zero-width-spaces">
+        <xsl:with-param name="s" select="."/>
+      </xsl:call-template>
+    </xsl:template>
+
+    <xsl:template match="@*|node()">
+      <xsl:copy>
+        <xsl:copy-of select="@*"/>
+        <xsl:apply-templates/>
+      </xsl:copy>
+    </xsl:template>
+
+    <xsl:template name="path-to-id">
+      <xsl:param name="p"/>
+      <xsl:text>_</xsl:text>
+      <xsl:call-template name="replace">
+        <xsl:with-param name="s" select="$p"/>
+        <xsl:with-param name="old">/</xsl:with-param>
+        <xsl:with-param name="new">.</xsl:with-param>
+      </xsl:call-template>
+    </xsl:template>
+
+    <xsl:template name="remove-zero-width-spaces">
+      <xsl:param name="s"/>
+      <xsl:call-template name="replace">
+        <xsl:with-param name="s" select="$s"/>
+        <xsl:with-param name="old">&#8203;</xsl:with-param>
+        <xsl:with-param name="new"/>
+      </xsl:call-template>
+    </xsl:template>
+
+    <xsl:template name="replace">
+      <xsl:param name="s"/>
+      <xsl:param name="old"/>
+      <xsl:param name="new"/>
+      <xsl:choose>
+        <xsl:when test="contains($s, $old)">
+          <xsl:call-template name="replace">
+            <xsl:with-param name="s" select="concat(substring-before($s, $old),
+                                                    $new,
+                                                    substring-after($s, $old))"/>
+            <xsl:with-param name="old" select="$old"/>
+            <xsl:with-param name="new" select="$new"/>
+          </xsl:call-template>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:value-of select="$s"/>
+        </xsl:otherwise>
+      </xsl:choose>
+    </xsl:template>
+
+    <xsl:template match="ol">
+      <xsl:if test="not(preceding-sibling::*[1]/self::ol)">
+        <xsl:variable name="following"
+                      select="following-sibling::ol[
+                                not(preceding-sibling::*[
+                                  not(self::ol) and
+                                  not(following-sibling::ol = current())
+                                ])
+                              ]"/>
+        <xsl:copy>
+          <xsl:apply-templates select="$following/@*[name() != 'start']"/>
+          <xsl:apply-templates select="@*"/>
+          <xsl:apply-templates select="node()"/>
+          <xsl:apply-templates select="$following/node()"/>
+        </xsl:copy>
+      </xsl:if>
+    </xsl:template>
+
+  </xsl:transform>
+
diff --git a/references/generate-json.py b/references/generate-json.py
new file mode 100755
index 0000000..b8b1f38
--- /dev/null
+++ b/references/generate-json.py
@@ -0,0 +1,154 @@
+#!/usr/bin/env python
+
+# Generate JSON to import Trac tickets into GitHub issues using the new import API
+# described at https://gist.github.com/jonmagic/5282384165e0f86ef105
+
+import os
+import time
+import json
+import yaml
+import sqlite3
+import hashlib
+import argparse
+import subprocess
+
+ticket_query = '''
+SELECT
+    id,
+    type,
+    owner,
+    reporter,
+    milestone,
+    status,
+    resolution,
+    summary,
+    description,
+    component,
+    priority,
+    time       / 1000000 AS createdtime,
+    changetime / 1000000 AS modifiedtime
+FROM
+    ticket
+ORDER BY
+    id
+'''
+
+comment_query = '''
+SELECT
+    time / 1000000 AS createdtime,
+    author,
+    newvalue
+FROM
+    ticket_change
+WHERE
+    ticket = ?
+AND
+    field = 'comment'
+AND
+    newvalue <> ''
+ORDER BY
+    time
+'''
+
+attachment_query = '''
+SELECT
+    id,
+    filename,
+    size,
+    author,
+    description,
+    ipnr,
+    time / 1000000 AS createdtime
+FROM
+    attachment
+WHERE
+    id = ?
+AND
+    type = 'ticket'
+ORDER BY
+    time, filename
+'''
+
+def isotime(t):
+  return None if t == 0 else time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime(t))
+
+def hashname(whatever):
+  return hashlib.sha1(unicode(whatever)).hexdigest()
+
+def ticket_text(ticket):
+  d = dict(ticket, createdtime = isotime(ticket["createdtime"]), modifiedtime = isotime(ticket["modifiedtime"]))
+  return u"{description}\n\n" \
+         u"_Trac ticket #{id} component {component} priority {priority}, owner {owner}," \
+         u" created by {reporter} on {createdtime}, last modified {modifiedtime}_\n".format(**d)
+
+def comment_text(comment):
+  d = dict(comment, createdtime = isotime(comment["createdtime"]))
+  return u"{newvalue}\n\n_Trac comment by {author} on {createdtime}_\n".format(**d)
+
+def attachment_text(attachment):
+  h1  = hashname(attachment["id"])
+  h2  = hashname(attachment["filename"])
+  fn2 = os.path.splitext(attachment["filename"])[1]
+  fn  = os.path.join(gist_url, h1[:3], h1, h2 + fn2)
+  url = "{}/raw/{}/ticket.{}.{}{}".format(gist_url.rstrip("/"), gist_commit, h1, h2, fn2)
+  d = dict(attachment, createdtime = isotime(comment["createdtime"]), url = url)
+  return u"[{filename}]({url}) {description}\n_Trac attachment by {author} on {createdtime}_\n".format(**d)
+
+def comment_merge(comments, attachments):
+  result = []
+  while comments and attachments:
+    result.append(comments.pop(0) if comments[0]["created_at"] <= attachments[0]["created_at"] else attachments.pop(0))
+  return result + comments + attachments
+
+parser = argparse.ArgumentParser(formatter_class = argparse.ArgumentDefaultsHelpFormatter)
+parser.add_argument("-c", "--config", type = argparse.FileType(),
+                    default = "generate-json.yaml", 
+                    help = "YAML config mappings")
+args = parser.parse_args()
+
+cfg = yaml.safe_load(args.config)
+assignee_map   = cfg["assignees"]
+type_map       = cfg["type_labels"]
+resolution_map = cfg["resolution_labels"]
+
+gist_url = cfg.get("attachment_gist_url")
+if gist_url is not None:
+  gist_commit = subprocess.check_output(("git", "ls-remote", gist_url, "HEAD")).split()[0]
+
+db = sqlite3.connect(cfg["database"])
+db.row_factory    = sqlite3.Row
+ticket_cursor     = db.cursor()
+comment_cursor    = db.cursor()
+attachment_cursor = db.cursor()
+
+if not os.path.isdir(cfg["ticket_directory"]):
+  os.makedirs(cfg["ticket_directory"])
+
+for ticket in ticket_cursor.execute(ticket_query):
+  comments = comment_merge([dict(created_at = isotime(comment["createdtime"]), body = comment_text(comment))
+                            for comment in comment_cursor.execute(comment_query, (ticket["id"],))],
+                           [] if gist_url is None else
+                           [dict(created_at = isotime(attachment["createdtime"]), body = attachment_text(attachment))
+                            for attachment in attachment_cursor.execute(attachment_query, (ticket["id"],))])
+  issue = dict(
+    title = ticket["summary"],
+    body  = ticket_text(ticket),
+    created_at = isotime(ticket["createdtime"]),
+    updated_at = isotime(ticket["modifiedtime"]))
+  if ticket["status"] == "closed":
+    issue["closed"] = True
+    issue["closed_at"] = isotime(ticket["modifiedtime"])
+    comments.append(dict(created_at = isotime(ticket["modifiedtime"]),
+                         body = "_Closed with resolution {resolution}_\n".format(**ticket)))
+  if ticket["owner"] in assignee_map:
+    issue["assignee"] = assignee_map[ticket["owner"]]
+  labels = [type_map.get(ticket["type"]), resolution_map.get(ticket["resolution"])]
+  while None in labels:
+    del labels[labels.index(None)]
+  if labels:
+    issue["labels"] = labels
+  issue = dict(issue = issue)
+  if comments:
+    issue["comments"] = comments
+  with open(os.path.join(cfg["ticket_directory"], "ticket_{:03d}.json".format(ticket["id"])), "wb") as f:
+    json.dump(issue, f, indent = 4, sort_keys = True, separators=(",", ": "))
diff --git a/references/pelicanconf.py b/references/pelicanconf.py
new file mode 100644
index 0000000..a28721d
--- /dev/null
+++ b/references/pelicanconf.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*- #
+from __future__ import unicode_literals
+
+AUTHOR = u'Rob Austein'
+SITENAME = u'Your Bug Report Will Be Graded'
+
+# Apparently this is much longer than theme designer expected.  Skip it for now.
+SITESUBTITLE = u'"I\'m not proud of being a congenital pain in the ass.  But I will take money for it."'
+
+PATH = 'content'
+TIMEZONE = 'UTC'
+DEFAULT_LANG = u'English'
+
+# Hack article URLs to match what Blogofile did, to avoid breaking links.
+
+ARTICLE_URL = '{date:%Y}/{date:%m}/{date:%d}/{slug}/'
+ARTICLE_SAVE_AS = '{date:%Y}/{date:%m}/{date:%d}/{slug}/index.html'
+
+# Feed generation is usually not desired when developing
+SITEURL = ''
+RELATIVE_URLS = True
+FEED_ALL_ATOM = None
+CATEGORY_FEED_ATOM = None
+TRANSLATION_FEED_ATOM = None
+AUTHOR_FEED_ATOM = None
+AUTHOR_FEED_RSS = None
+
+# Blogroll
+LINKS = (('Pelican', 'http://getpelican.com/'),
+         ('Python.org', 'http://python.org/'),
+         ('Jinja2', 'http://jinja.pocoo.org/'))
+LINKS_WIDGET_NAME = "Links"
+
+# Social widget.  Can't get rid of this with default theme, only change its name.
+# Fiddle with themes later
+SOCIAL = ()
+SOCIAL_WIDGET_NAME = "Subscribe"
+
+DEFAULT_PAGINATION = 10
+
+THEME = "/home/blog/pelican-themes/sundown"
diff --git a/references/publishconf.py b/references/publishconf.py
new file mode 100644
index 0000000..f0fb21d
--- /dev/null
+++ b/references/publishconf.py
@@ -0,0 +1,19 @@
+#!/usr/local/bin/python2.7
+# -*- coding: utf-8 -*- #
+from __future__ import unicode_literals
+
+# This file is only used if you use `make publish` or
+# explicitly specify it as your config file.
+
+import os
+import sys
+sys.path.append(os.curdir)
+from pelicanconf import *
+
+SITEURL = 'https://www.hactrn.net/blog'
+RELATIVE_URLS = False
+
+FEED_ALL_ATOM = 'feeds/all.atom.xml'
+CATEGORY_FEED_ATOM = 'feeds/{slug}.atom.xml'
+
+DELETE_OUTPUT_DIRECTORY = True
diff --git a/references/rpki-wiki-to-markdown.py b/references/rpki-wiki-to-markdown.py
new file mode 100644
index 0000000..dff87e6
--- /dev/null
+++ b/references/rpki-wiki-to-markdown.py
@@ -0,0 +1,341 @@
+# Copyright (C) 2016  Parsons Government Services ("PARSONS")
+# Portions copyright (C) 2014  Dragon Research Labs ("DRL")
+# Portions copyright (C) 2012  Internet Systems Consortium ("ISC")
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notices and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND PARSONS, DRL, AND ISC DISCLAIM
+# ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL
+# PARSONS, DRL, OR ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""
+Trac Wiki -> Markdown converter, hacked from old Trac Wiki -> PDF/flat
+text converter.
+
+Pull HTML pages from a Trac Wiki, feed the useful bits to 
+html2text to generate Markdown.
+
+Assumes you're using the TracNav plugin for the Wiki pages, and uses
+the same list as the TracNav plugin does to determine the set of pages
+to convert.
+"""
+
+# Dependencies, at least on Ubuntu Xenial:
+#
+#   apt-get install python-lxml python-html2text
+#
+# Be warned that there are many unrelated packages named "html2text",
+# installed under various names on various platforms.  This one
+# happens to be a useful HTML-to-Markdown converter.
+
+# Most of the work of massaging the HTML is done using XSL transforms,
+# because the template-driven style makes that easy.  There's probably
+# some clever way to use lxml's XPath code to do the same thing in a
+# more pythonic way with ElementTrees, but I already had the XSL
+# transforms and there's a point of diminishing returns on this sort of
+# thing.
+
+import sys
+import os
+import argparse
+import lxml.etree
+import urllib
+import urlparse
+import subprocess
+import zipfile
+
+# Main program, up front so it doesn't get lost under all the XSL
+
+def main():
+
+    base = "https://trac.rpki.net"
+
+    parser = argparse.ArgumentParser(description = __doc__, formatter_class = argparse.ArgumentDefaultsHelpFormatter)
+    parser.add_argument("-b", "--base_url",
+                        default = base,
+                        help = "base URL for documentation web site")
+    parser.add_argument("-t", "--toc",
+                        default = base + "/wiki/doc/RPKI/TOC",
+                        help = "table of contents URL")
+    parser.add_argument("-d", "--directory",
+                        default = ".",
+                        help = "output directory")
+    parser.add_argument("-p", "--prefix",
+                        default = "/wiki/doc",
+                        help = "page name prefix on wiki")
+    args = parser.parse_args()
+
+    urls = str(xsl_get_toc(lxml.etree.parse(urllib.urlopen(args.toc)).getroot(),
+                           basename = repr(args.base_url))).splitlines()
+
+    assert all(urlparse.urlparse(url).path.startswith(args.prefix) for url in urls)
+
+    for pagenum, url in enumerate(urls):
+        path = urlparse.urlparse(url).path
+        page = xsl_get_page(lxml.etree.parse(urllib.urlopen(url)).getroot(),
+                            basename = repr(args.base_url),
+                            path = repr(path))
+
+        fn_base = os.path.join(args.directory, "{:02d}{}".format(pagenum, path[len(args.prefix):].replace("/", ".")))
+
+        fn = fn_base + ".zip"
+        zip_url = urlparse.urljoin(url, "/zip-attachment{}/".format(path))
+        urllib.urlretrieve(zip_url, fn)
+        with zipfile.ZipFile(fn, "r") as z:
+            if len(z.namelist()) == 0:
+                os.unlink(fn)
+            else:
+                sys.stderr.write("Wrote {}\n".format(fn))
+
+        for imgnum, img in enumerate(page.xpath("//img | //object | //embed")):
+            img_url = img.get("data" if img.tag == "object" else "src")
+            img_url = urlparse.urljoin(url, img_url)
+            fn = "{}.{:02d}{}".format(fn_base, imgnum, os.path.splitext(img_url)[1])
+            urllib.urlretrieve(img_url, fn)
+            sys.stderr.write("Wrote {}\n".format(fn))
+
+        html2markdown = subprocess.Popen(("html2markdown", "--no-skip-internal-links", "--reference-links"),
+                                         stdin = subprocess.PIPE, stdout = subprocess.PIPE)
+        page.write(html2markdown.stdin)
+        html2markdown.stdin.close()
+        lines = html2markdown.stdout.readlines()
+        html2markdown.stdout.close()
+        html2markdown.wait()
+
+        while lines and lines[0].isspace():
+            del lines[0]
+
+        fn = fn_base + ".md"
+        with open(fn, "w") as f:
+            want_blank = False
+            for line in lines:
+                blank = line.isspace()
+                if want_blank and not blank:
+                    f.write("\n")
+                if not blank:
+                    f.write(line)
+                want_blank = blank
+        sys.stderr.write("Wrote {}\n".format(fn))
+
+        fn = fn[:-3] + ".wiki"
+        urllib.urlretrieve(url + "?format=txt", fn)
+        sys.stderr.write("Wrote {}\n".format(fn))
+
+
+# XSL transform to extract list of Wiki page URLs from the TOC Wiki page
+
+xsl_get_toc = lxml.etree.XSLT(lxml.etree.XML('''\
+  <xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                 version="1.0">
+
+    <xsl:output method="text" encoding="us-ascii"/>
+
+    <xsl:param name="basename"/>
+
+    <xsl:template match="/">
+      <xsl:for-each select="//div[@id = 'wikipage']/ul//a">
+        <xsl:value-of select="concat($basename, @href, '&#10;')"/>
+      </xsl:for-each>
+    </xsl:template>
+
+  </xsl:transform>
+'''))
+
+# XSL transform to extract useful content of a Wiki page.
+
+# Django generates weird HTML for ordered lists: it sometimes breaks
+# up a single ordered list into multiple adjacent <ol/> elements,
+# using the @start attribute to try to make the result look like a
+# single ordered list.  This looks OK in Firefox but confuses the
+# bejesus out of both html2markdown and htmldoc.  In some cases this is
+# probably unavoidable, but most of the uses of this I've seen look
+# gratuitous, and are probably the result of code modulararity issues
+# in Django.
+#
+# So we try to clean this up, by merging adjacent <ol/> elements where
+# we can.  The merge incantation is an adaptation of:
+#
+# http://stackoverflow.com/questions/1806123/merging-adjacent-nodes-of-same-type-xslt-1-0
+#
+# There may be a more efficient way to do this, but I don't think
+# we care, and this seems to work.
+#
+# Original author's explanation:
+#
+# The rather convoluted XPath expression for selecting the following
+# sibling aaa nodes which are merged with the current one:
+#
+# following-sibling::aaa[                       # following 'aaa' siblings
+#   not(preceding-sibling::*[                   #   if they are not preceded by
+#     not(self::aaa) and                        #     a non-'aaa' node
+#     not(following-sibling::aaa = current())   #     after the current node
+#   ])
+# ]
+
+xsl_get_page = lxml.etree.XSLT(lxml.etree.XML('''\
+  <xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+
+    <xsl:output method="xml" encoding="us-ascii" omit-xml-declaration="yes" />
+
+    <xsl:param name="basename"/>
+    <xsl:param name="path"/>
+
+    <xsl:template match="/">
+      <xsl:message><xsl:value-of select="concat('Got path: ', $path)"/></xsl:message>
+      <xsl:variable name="id">
+        <xsl:call-template name="path-to-id">
+          <xsl:with-param name="p" select="$path"/>
+        </xsl:call-template>
+      </xsl:variable>
+      <xsl:message><xsl:value-of select="concat('Got id: ', $id)"/></xsl:message>
+      <xsl:comment>NEW PAGE</xsl:comment>
+      <html>
+        <body>
+          <div id="{$id}">
+            <xsl:apply-templates select="//div[@id = 'wikipage']/*"/>
+          </div>
+        </body>
+      </html>
+    </xsl:template>
+
+    <xsl:template match="//div[contains(@class, 'wiki-toc')]"/>
+
+    <xsl:template match="//span[@class = 'icon' and not(*)]"/>
+
+    <xsl:template match="a[contains(@class, 'wiki') and
+                           starts-with(@href, '/wiki/')]">
+      <xsl:variable name="href">
+        <xsl:call-template name="path-to-id">
+          <xsl:with-param name="p" select="@href"/>
+        </xsl:call-template>
+      </xsl:variable>
+      <a href="#{$href}">
+        <xsl:apply-templates select="@*[name() != 'href']"/>
+        <xsl:apply-templates/>
+      </a>
+    </xsl:template>
+
+    <xsl:template match="a[starts-with(@href, '/attachment/wiki/')]">
+      <a href="{concat($basename, @href)}">
+        <xsl:apply-templates select="@*[name() != 'href']"/>
+        <xsl:apply-templates/>
+      </a>
+    </xsl:template>
+
+    <xsl:template match="img[starts-with(@src, '/raw-attachment/wiki/')]">
+      <img src="{concat($basename, @src)}">
+        <xsl:apply-templates select="@*[name() != 'src']"/>
+        <xsl:apply-templates/>
+      </img>
+    </xsl:template>
+
+    <xsl:template match="object[starts-with(@data, '/raw-attachment/wiki/') or
+                                starts-with(@data, '/graphviz/')]">
+      <object data="{concat($basename, @data)}">
+        <xsl:apply-templates select="@*[name() != 'data']"/>
+        <xsl:apply-templates/>
+      </object>
+    </xsl:template>
+
+    <xsl:template match="embed[starts-with(@src, '/raw-attachment/wiki/') or
+                               starts-with(@src, '/graphviz/')]">
+      <embed src="{concat($basename, @src)}">
+        <xsl:apply-templates select="@*[name() != 'src']"/>
+        <xsl:apply-templates/>
+      </embed>
+    </xsl:template>
+
+    <xsl:template match="text()[contains(., '&#8203;')]">
+      <xsl:call-template name="remove-zero-width-spaces">
+        <xsl:with-param name="s" select="."/>
+      </xsl:call-template>
+    </xsl:template>
+
+    <xsl:template match="@*|node()">
+      <xsl:copy>
+        <xsl:copy-of select="@*"/>
+        <xsl:apply-templates/>
+      </xsl:copy>
+    </xsl:template>
+
+    <xsl:template name="path-to-id">
+      <xsl:param name="p"/>
+      <xsl:text>_</xsl:text>
+      <xsl:call-template name="replace">
+        <xsl:with-param name="s" select="$p"/>
+        <xsl:with-param name="old">/</xsl:with-param>
+        <xsl:with-param name="new">.</xsl:with-param>
+      </xsl:call-template>
+    </xsl:template>
+
+    <xsl:template name="remove-zero-width-spaces">
+      <xsl:param name="s"/>
+      <xsl:call-template name="replace">
+        <xsl:with-param name="s" select="$s"/>
+        <xsl:with-param name="old">&#8203;</xsl:with-param>
+        <xsl:with-param name="new"/>
+      </xsl:call-template>
+    </xsl:template>
+
+    <xsl:template name="replace">
+      <xsl:param name="s"/>
+      <xsl:param name="old"/>
+      <xsl:param name="new"/>
+      <xsl:choose>
+        <xsl:when test="contains($s, $old)">
+          <xsl:call-template name="replace">
+            <xsl:with-param name="s" select="concat(substring-before($s, $old),
+                                                    $new,
+                                                    substring-after($s, $old))"/>
+            <xsl:with-param name="old" select="$old"/>
+            <xsl:with-param name="new" select="$new"/>
+          </xsl:call-template>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:value-of select="$s"/>
+        </xsl:otherwise>
+      </xsl:choose>
+    </xsl:template>
+
+    <xsl:template match="ol">
+      <xsl:if test="not(preceding-sibling::*[1]/self::ol)">
+        <xsl:variable name="following"
+                      select="following-sibling::ol[
+                                not(preceding-sibling::*[
+                                  not(self::ol) and
+                                  not(following-sibling::ol = current())
+                                ])
+                              ]"/>
+        <xsl:copy>
+          <xsl:apply-templates select="$following/@*[name() != 'start']"/>
+          <xsl:apply-templates select="@*"/>
+          <xsl:apply-templates select="node()"/>
+          <xsl:apply-templates select="$following/node()"/>
+        </xsl:copy>
+      </xsl:if>
+    </xsl:template>
+
+  </xsl:transform>
+'''))
+
+# All the files we want to parse are HTML, so make HTML the default
+# parser.  In theory the HTML produced by Trac is XHTML thus should
+# parse correctly (in fact, better) as XML, but in practice this seems
+# not to work properly at the moment, while parsing as HTML does.
+# Haven't bothered to figure out why, life is too short.
+#
+# If you're reading this comment because this script stopped working
+# after a Trac upgrade, try commenting out this line to see whether
+# things have changed and Trac's HTML now parses better as XML.
+
+lxml.etree.set_default_parser(lxml.etree.HTMLParser())
+
+# Run the main program.
+main()
diff --git a/references/schema.sql b/references/schema.sql
new file mode 100644
index 0000000..1515dbb
--- /dev/null
+++ b/references/schema.sql
@@ -0,0 +1,177 @@
+CREATE TABLE system (
+    name text PRIMARY KEY,
+    value text
+);
+CREATE TABLE permission (
+    username text,
+    action text,
+    UNIQUE (username,action)
+);
+CREATE TABLE auth_cookie (
+    cookie text,
+    name text,
+    ipnr text,
+    time integer,
+    UNIQUE (cookie,ipnr,name)
+);
+CREATE TABLE session (
+    sid text,
+    authenticated integer,
+    last_visit integer,
+    UNIQUE (sid,authenticated)
+);
+CREATE INDEX session_last_visit_idx ON session (last_visit);
+CREATE INDEX session_authenticated_idx ON session (authenticated);
+CREATE TABLE session_attribute (
+    sid text,
+    authenticated integer,
+    name text,
+    value text,
+    UNIQUE (sid,authenticated,name)
+);
+CREATE TABLE cache (
+    id integer PRIMARY KEY,
+    generation integer,
+    key text
+);
+CREATE TABLE attachment (
+    type text,
+    id text,
+    filename text,
+    size integer,
+    time integer,
+    description text,
+    author text,
+    ipnr text,
+    UNIQUE (type,id,filename)
+);
+CREATE TABLE wiki (
+    name text,
+    version integer,
+    time integer,
+    author text,
+    ipnr text,
+    text text,
+    comment text,
+    readonly integer,
+    UNIQUE (name,version)
+);
+CREATE INDEX wiki_time_idx ON wiki (time);
+CREATE TABLE repository (
+    id integer,
+    name text,
+    value text,
+    UNIQUE (id,name)
+);
+CREATE TABLE revision (
+    repos integer,
+    rev text,
+    time integer,
+    author text,
+    message text,
+    UNIQUE (repos,rev)
+);
+CREATE INDEX revision_repos_time_idx ON revision (repos,time);
+CREATE TABLE ticket (
+    id integer PRIMARY KEY,
+    type text,
+    time integer,
+    changetime integer,
+    component text,
+    severity text,
+    priority text,
+    owner text,
+    reporter text,
+    cc text,
+    version text,
+    milestone text,
+    status text,
+    resolution text,
+    summary text,
+    description text,
+    keywords text
+);
+CREATE INDEX ticket_time_idx ON ticket (time);
+CREATE INDEX ticket_status_idx ON ticket (status);
+CREATE TABLE ticket_change (
+    ticket integer,
+    time integer,
+    author text,
+    field text,
+    oldvalue text,
+    newvalue text,
+    UNIQUE (ticket,time,field)
+);
+CREATE INDEX ticket_change_ticket_idx ON ticket_change (ticket);
+CREATE INDEX ticket_change_time_idx ON ticket_change (time);
+CREATE TABLE ticket_custom (
+    ticket integer,
+    name text,
+    value text,
+    UNIQUE (ticket,name)
+);
+CREATE TABLE enum (
+    type text,
+    name text,
+    value text,
+    UNIQUE (type,name)
+);
+CREATE TABLE component (
+    name text PRIMARY KEY,
+    owner text,
+    description text
+);
+CREATE TABLE milestone (
+    name text PRIMARY KEY,
+    due integer,
+    completed integer,
+    description text
+);
+CREATE TABLE version (
+    name text PRIMARY KEY,
+    time integer,
+    description text
+);
+CREATE TABLE report (
+    id integer PRIMARY KEY,
+    author text,
+    title text,
+    query text,
+    description text
+);
+CREATE TABLE notify_subscription (
+    id integer PRIMARY KEY,
+    time integer,
+    changetime integer,
+    class text,
+    sid text,
+    authenticated integer,
+    distributor text,
+    format text,
+    priority integer,
+    adverb text
+);
+CREATE INDEX notify_subscription_sid_authenticated_idx ON notify_subscription (sid,authenticated);
+CREATE INDEX notify_subscription_class_idx ON notify_subscription (class);
+CREATE TABLE notify_watch (
+    id integer PRIMARY KEY,
+    sid text,
+    authenticated integer,
+    class text,
+    realm text,
+    target text
+);
+CREATE INDEX notify_watch_sid_authenticated_class_idx ON notify_watch (sid,authenticated,class);
+CREATE INDEX notify_watch_class_realm_target_idx ON notify_watch (class,realm,target);
+CREATE TABLE node_change (
+    id integer PRIMARY KEY,
+    repos integer,
+    rev text,
+    path text,
+    node_type text,
+    change_type text,
+    base_path text,
+    base_rev text
+);
+CREATE INDEX node_change_repos_rev_path_idx ON node_change (repos,rev,path);
+CREATE INDEX node_change_repos_path_rev_idx ON node_change (repos,path,rev);
diff --git a/references/trac-wiki-to-markdown.rb b/references/trac-wiki-to-markdown.rb
new file mode 100644
index 0000000..f7d41ae
--- /dev/null
+++ b/references/trac-wiki-to-markdown.rb
@@ -0,0 +1,51 @@
+# Untested code snippet from https://gist.github.com/somebox/619537
+
+class String
+  def trac_to_markdown!
+    gsub!(/\{\{\{([^\n]+?)\}\}\}/, '`\1`')
+    gsub!(/\{\{\{(.+?)\}\}\}/m){|m| m.each_line.map{|x| "\t#{x}".gsub(/[\{\}]{3}/,'')}.join}
+    gsub!(/\=\=\=\=\s(.+?)\s\=\=\=\=/, '### \1')
+    gsub!(/\=\=\=\s(.+?)\s\=\=\=/, '## \1')
+    gsub!(/\=\=\s(.+?)\s\=\=/, '# \1')
+    gsub!(/\=\s(.+?)\s\=[\s\n]*/, '')
+    gsub!(/\[(http[^\s\[\]]+)\s([^\[\]]+)\]/, '[\2](\1)')
+    gsub!(/\!(([A-Z][a-z0-9]+){2,})/, '\1')
+    gsub!(/'''(.+)'''/, '*\1*')
+    gsub!(/''(.+)''/, '_\1_')
+    gsub!(/^\s\*/, '*')
+    gsub!(/^\s\d\./, '1.')
+
+    gsub!(/\{\{\{([^\n]+?)\}\}\}/, '`\1`')
+    gsub!(/'''(.+?)'''/, '**\1**')
+    gsub!(/''(.+?)''/, '*\1*')
+    gsub!(/((^\|\|[^\n\r]+\|\|[ \t]*\r?(\n|$))+)/m) do |m|
+      m = m.each_line.map do |x|
+        x.gsub(/\t/, ' ')
+          .gsub(/(\|\|){2,}/){|k| k.gsub(/\|\|/, '||   ')}
+        .gsub(/ {3,}/, '   ')
+      end.join
+      lines = m.each_line.to_a
+      line1 = lines.shift
+      line2 = line1.dup.gsub(/[^\n\r\|]/, '-')
+      lines.unshift(line1, line2)
+      c = lines.join
+      c = c.each_line.map do |x|
+        x.gsub(/\=\s?(.+?)\s?=/, ' \1 ')
+          .gsub(/\|\|/, '|')
+      end.join
+    end
+    gsub!(/^\{\{\{(.+?)^\}\}\}/m, '```\1```')
+    gsub!(/\=\=\=\=\s(.+?)\s\=\=\=\=/, '### \1')
+    gsub!(/\=\=\=\s(.+?)\s\=\=\=/, '## \1')
+    gsub!(/\=\=\s(.+?)\s\=\=/, '# \1')
+    gsub!(/\=\s(.+?)\s\=[\s\n]*/, '')
+    gsub!(/\[(http[^\s\[\]]+)\s([^\[\]]+)\]/, '[\2](\1)')
+    gsub!(/\!(([A-Z][a-z0-9]+){2,})/, '\1')
+    gsub!(/^\s\*/, '*')
+    gsub!(/^\s\d\./, '1.')
+  end
+end
+
+some_trac = 'my document'
+
+puts some_trac.trac_to_markdown!
diff --git a/references/trac2down.py b/references/trac2down.py
new file mode 100644
index 0000000..c66a201
--- /dev/null
+++ b/references/trac2down.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python2
+
+# Untested code from https://gist.githubusercontent.com/sgk/1286682/raw/b744dd2e47a68d60373ad39df87cfe8256f517af/trac2down.py
+
+# vim:set fileencoding=utf-8 sw=2 ai:
+
+import sqlite3
+import datetime
+import re
+
+SQL = '''
+  select
+      name, version, time, author, text
+    from
+      wiki w
+    where
+      version = (select max(version) from wiki where name = w.name)
+'''
+
+conn = sqlite3.connect('../trac.db')
+result = conn.execute(SQL)
+for row in result:
+  name = row[0]
+  version = row[1]
+  time = row[2]
+  author = row[3]
+  text = row[4]
+
+  text = re.sub('\r\n', '\n', text)
+  text = re.sub(r'{{{(.*?)}}}', r'`\1`', text)
+  def indent4(m):
+    return '\n    ' + m.group(1).replace('\n', '\n    ')
+  text = re.sub(r'(?sm){{{\n(.*?)\n}}}', indent4, text)
+  text = re.sub(r'(?m)^====\s+(.*?)\s+====$', r'#### \1', text)
+  text = re.sub(r'(?m)^===\s+(.*?)\s+===$', r'### \1', text)
+  text = re.sub(r'(?m)^==\s+(.*?)\s+==$', r'## \1', text)
+  text = re.sub(r'(?m)^=\s+(.*?)\s+=$', r'# \1', text)
+  text = re.sub(r'^       * ', r'****', text)
+  text = re.sub(r'^     * ', r'***', text)
+  text = re.sub(r'^   * ', r'**', text)
+  text = re.sub(r'^ * ', r'*', text)
+  text = re.sub(r'^ \d+. ', r'1.', text)
+
+  a = []
+  for line in text.split('\n'):
+    if not line.startswith('    '):
+      line = re.sub(r'\[(https?://[^\s\[\]]+)\s([^\[\]]+)\]', r'[\2](\1)', line)
+      line = re.sub(r'\[(wiki:[^\s\[\]]+)\s([^\[\]]+)\]', r'[\2](/\1/)', line)
+      line = re.sub(r'\!(([A-Z][a-z0-9]+){2,})', r'\1', line)
+      line = re.sub(r'\'\'\'(.*?)\'\'\'', r'*\1*', line)
+      line = re.sub(r'\'\'(.*?)\'\'', r'_\1_', line)
+    a.append(line)
+  text = '\n'.join(a)
+
+  fp = file('%s.md' % name, 'w')
+  print >>fp, '<!-- Name: %s -->' % name
+  print >>fp, '<!-- Version: %d -->' % version
+  print >>fp, '<!-- Last-Modified: %s -->' % datetime.datetime.fromtimestamp(time).strftime('%Y/%m/%d %H:%M:%S')
+  print >>fp, '<!-- Author: %s -->' % author
+  fp.write(text.encode('utf-8'))
+  fp.close()
author	Rob Austein <sra@hactrn.net>	2021-02-14 16:56:57 +0000
committer	Rob Austein <sra@hactrn.net>	2021-02-14 16:56:57 +0000
commit	68e18ad1f44e9a6fab66adc38e97d027a58de8a4 (patch)
tree	22eb915c53760c6b6f0f5254d027de9dee58abd1 /references
parent	7bf10bb74babd8f16b7a3942607f3d1007aa2324 (diff)