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#!/usr/bin/env python
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from __future__ import with_statement





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import sys





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import subprocess





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import gitaggregates





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def read_tag(t):





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    args = ['git', 'cat-file', 'tag', t]





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    sub = subprocess.Popen(args, stdout=subprocess.PIPE, close_fds=True)





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    rv=None





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    for l in sub.stdout:





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        if rv is not None:





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            rv.append(l)





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        elif l.strip() == '':





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            rv = []





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    return ''.join(rv)





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def emit(prev, r, f=sys.stdout):





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    tagdesc = read_tag(r)





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    c = gitaggregates.Contributors([prev + '..' + r])





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    chart = c.mk_chart()





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    pie_url = chart.BASE_URL + '&'.join(chart.get_url_bits())





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    vdesc = "Changes from release %s to %s" % (prev, r)





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    if not prev:





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        vdesc = "Release " + r





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    f.write("<h2>%s</h2>\n" % (vdesc))





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    f.write("""<div><img class="pie" src="%s" alt="contributors"/>"""





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            % pie_url)





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    f.write("<pre>%s</pre></div>" % tagdesc)





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if __name__ == '__main__':





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    if not sys.argv[1:]:





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        sys.stderr.write("Need to list some tag objects.\n")





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        sys.exit(1)





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    title = "Changelog"





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    try:





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        with open(".git/description") as f:





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            desc = f.read().strip()





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            if not desc.startswith("Unnamed repository"):





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                title= "Changelog for " + desc





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    except:





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        pass





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    print """<?xml version="1.0" encoding="UTF-8"?>





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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"





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        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">





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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">





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<head>





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    <title>%s</title>





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    <style type="text/css">





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        .pie {





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            float: right;





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        }





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        h2 {





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            clear: both;





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        }





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    </style>





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</head>





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<body>





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""" % title





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    print "<h1>%s</h1>" % title





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    prev = ''





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    pairs = []





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    for r in sys.argv[1:]:





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        pairs.append((prev, r))





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        prev = r





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    for prev, r in reversed(pairs):





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        emit(prev, r)





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    print "</body></html>"