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#!/usr/bin/python

import os, os.path, sys
import deb822, re

TrackerDir = "."

## get an unsorted list of tracked issues
def trackedIssues(dir):
    ignores = [ re.compile('~$'),
                re.compile('^#.*#$'),
                re.compile('^00'),
                re.compile('\.patch$')]
               
    validpaths = []
    for f in os.listdir(dir):
        nogood = False
        for i in ignores:
            if i.search(f):
                nogood = True
                break
        if nogood:
            continue
        else:
            validpaths.append(f)

    issues = []
    for f in validpaths:
        path = os.path.join(dir, f)
        if os.path.isfile(path):
            issues.append(f)
    return issues

def trackedVersions(dir):
    pkglist = os.path.join(dir, '00pkglist')
    f = open(pkglist, 'r')
    return f.read().split('\n')[:-1]

def issueStatus(issue, version):
    path = os.path.join(TrackerDir, issue)
    i = deb822.deb822(open(path, 'r'))
    if i.hasField(version):
        return i.map[version]
    else:
        return None

def statusMatrix(issues, versions):
    Di = {}
    for i in issues:
        Dv = {}
        for v in versions:
            Dv[v] = issueStatus(i, v)
        Di[i] = Dv
    return Di

## remaining functions create the HTML
def htmlHeader():
    sys.stdout.write('<html>\n')
    sys.stdout.write('<head>\n')
    sys.stdout.write('  <title>Debian Kernel Patch Tracker Status</title>\n')
    sys.stdout.write('</head>\n')
    sys.stdout.write('<body>\n')
    sys.stdout.write('<h1><center>Debian Kernel Patch Tracker Status</center></h1>')
    key = '''
    <table border=1>
      <tr>
        <td>Key</td>
      </tr>
      <tr>
        <td bgcolor="green">Fixed or N/A - version is listed if specified</td>
      </tr>
      <tr>
        <td bgcolor="lightgreen">Pending - version is listed if specified</td>
      </tr>
      <tr>
        <td bgcolor="yellow">Needed</td>
      </tr>
      <tr>
        <td bgcolor="orange">Ignored</td>
      </tr>
    </table>'''
    sys.stdout.write(key)
    sys.stdout.write('<BR>\n')
      

def htmlFooter():
    sys.stdout.write('  </body>\n')
    sys.stdout.write('</html>\n')
                     
def tableHeader(columns):
    ## populateTable() will assume columns should be filled out
    ## in sort() order, so make sure our column names match
    columns.sort()
    sys.stdout.write("<table border=1>\n")
    sys.stdout.write("  <tr>\n")
    sys.stdout.write("    <td> </td>\n")
    for c in columns:
        sys.stdout.write("    <td>"+c+"</td>\n")
    sys.stdout.write("  </tr>\n")

def tableFooter():
    sys.stdout.write("</table>\n")

## Parse a status string, and return an html table entry
def statusCell(status):
    if not status:
        return '<td color="grey">Unknown</td>'

    statusRe = re.compile("(?P<status>\S+)(\s*\((?P<ver>.*)\))?(\s*\[(?P<name>.*)\])?$")

    m = statusRe.match(status)
    if m:
        d = m.groupdict()
        ver = name = ""
        if d.has_key('ver') and d['ver']:
            ver = d['ver']
        if d.has_key('name') and d['name']:
            name = d['name']

        if d['status'] == 'N/A':
            return '<td bgcolor="green">N/A</td>'
        elif d['status'] == "released":
            return '<td bgcolor="green">' + ver + '</td>'
        elif d['status'] == "pending":
            return '<td bgcolor="lightgreen">' + ver + '</td>'
        elif d['status'] == "needed":
            return '<td bgcolor="yellow">' + ver + '</td>'
        elif d['status'] == "ignored":
            return '<td bgcolor="orange">' + ver + '</td>'
    else:
        return '<td bgcolor="grey">Unknown</td>'

def populateTable(matrix):
    issues = matrix.keys()
    issues.sort()
    
    cvere = re.compile('^CVE-\d\d\d\d\-\d\d\d\d')
    for i in issues:
        if cvere.match(i):
	    issueref = '<a href="http://svn.debian.org/wsvn/kernel-sec/active/'+i+'?op=file&rev=0&sc=0">'+i+'</a>'
	else:
	    issueref = i
        versions = matrix[i].keys()
        versions.sort()
        sys.stdout.write('  <tr>\n')
        sys.stdout.write('    <td>' + issueref + '</td>\n')
        for v in versions:
            cell = statusCell(matrix[i][v].strip())
            if cell:
                sys.stdout.write(cell)
            else:
                sys.stderr.write("Error in field: " + i + ", " + v + "\n")
        sys.stdout.write('  </tr>\n')
    
if __name__ == '__main__':
    ## Doing this in a separate stage means some unnecessary duplicate
    ## opens & closes... but oh well - our data set isn't very large
    issues = trackedIssues(TrackerDir)
    versions = trackedVersions(TrackerDir)

    htmlHeader()
    tableHeader(versions)
    populateTable(statusMatrix(issues, versions))
    tableFooter()
    htmlFooter()

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