1 files changed, 153 insertions, 0 deletions
diff --git a/cl2vcs.py b/cl2vcs.py
new file mode 100644
index 0000000..be58145
--- /dev/null
+++ b/cl2vcs.py
@@ -0,0 +1,153 @@
+#!/usr/bin/python3 -u
+# vim: set fileencoding=utf-8 :
+#
+# (C) 2008,2015,2022 Guido Guenther <agx@sigxcpu.org>
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+"""Link Debian changelog entries to the VCS"""
+
+from builtins import str
+import cgi
+import os
+import re
+import sys
+import requests
+from lxml import etree
+from genshi.template import TemplateLoader
+import vcsbrowsers
+from htmlchangelog import HTMLChangelog
+from io import BytesIO
+
+VERSION="0.0.5"
+XMLNS='http://www.w3.org/1999/xhtml'
+PTS='http://packages.qa.debian.org'
+PKGNAMERE="[a-zA-Z0-9.+\-]+$"
+TITLE = "cl2vcs %s" % VERSION
+
+
+def fetch_changelog(cl_url):
+    resp = requests.get(cl_url, timeout=5.0)
+    resp.raise_for_status()
+    return resp.content
+
+
+def fetch_pts_page(package):
+    pts = None
+    url = "%s/%s" % (PTS, package)
+    resp = requests.get(url, timeout=5.0)
+    if resp.status_code == 404:
+        raise Exception("Can't find package '%s' on '%s'" % (package, PTS))
+    resp.raise_for_status()
+    return resp.content
+
+
+def parse_pts_xhtml(pts):
+    cl_url = None
+    vcs_url = None
+    vcs = None
+
+    tree = etree.parse(BytesIO(pts))
+    searcher = etree.ETXPath('/{%s}html/{%s}body//{%s}a[@href]' % (XMLNS, XMLNS, XMLNS))
+    result = searcher(tree)
+
+    for r in result:
+        if not r.text:
+            continue
+        if r.text.lower() == "changelog":
+            cl_url = r.attrib['href']
+        elif r.text.lower() == "browse":
+            vcs_url = r.attrib['href']
+            parent = r.getparent()
+            vcs = parent.getchildren()[0].text.lower()
+    return cl_url, vcs_url, vcs
+
+
+def get_vcsbrowser(vcs, vcs_url):
+    if vcs == "git":
+        return vcsbrowsers.guess_git_repo(vcs_url)
+    elif vcs == "Mercurial":
+        return vcsbrowsers.HgBrowser(vcs_url)
+
+
+def render_search_page(title, pkg=None, err=None):
+    loader = TemplateLoader('templates')
+    tmpl = loader.load('index.html', encoding='utf-8')
+    t = tmpl.generate(title=title, pkg=pkg, err=err)
+    print(t.render('xhtml', doctype='xhtml-strict'))
+
+
+
+def render_changelog_page(cl):
+    print(cl)
+
+
+def handle_pkg(pkg, title):
+    if pkg:
+        if not re.match(PKGNAMERE, pkg):
+            return render_search_page(title=title, err=u"Invalid package name: '%s'" % pkg)
+        else:
+            pkg = str(pkg)
+    else:
+        return render_search_page(title=title, err="")
+
+    try:
+        pts = fetch_pts_page(pkg)
+    except Exception as exc_err:
+        err = exc_err
+        pts = None
+
+    if not pts:
+        return render_search_page(title=title, pkg=pkg, err=err)
+
+    cl_url, vcs_url, vcs = parse_pts_xhtml(pts)
+    if cl_url == None:
+        return render_search_page(title=title, pkg=pkg,
+                                  err="Cannot parse changelog from PTS page.")
+    try:
+        cl_text = fetch_changelog(cl_url)
+    except urlgrabber.grabber.URLGrabError as e:
+        (errcode, errmsg) = e.args
+        return render_search_page(title=title,
+                                  err="Cannot fetch '%s': %s" % (cl_url, errmsg))
+    if vcs and vcs_url:
+        vcsbrowser = get_vcsbrowser(vcs, vcs_url)
+    else:
+        vcsbrowser = None
+    cl = HTMLChangelog(cl_text, vcsbrowser=vcsbrowser)
+    if cl:
+        render_changelog_page(cl)
+
+
+def main(argv):
+    err = ""
+
+    print("Content-Type: text/html; charset=utf-8")
+    print()
+
+    try:
+        form = cgi.FieldStorage()
+
+        if 'pkg' in form:
+            pkg = form.getfirst('pkg').strip()
+        else:
+            pkg = None
+
+        handle_pkg(pkg, TITLE)
+    except Exception as err:
+        import traceback
+        traceback.print_exc(file=sys.stderr)
+        render_search_page(title=TITLE, err="Unknown error")
+    return 0
+