summaryrefslogtreecommitdiff
path: root/amo-changelog
blob: f95359b16e216f54fd3ff2fca40d434d7a628c04 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
#!/usr/bin/python

# Copyright (c) 2014, Jakub Wilk <jwilk@debian.org>
# Copyright (c) 2014, Ximin Luo <infinity0@pwned.gg>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.

from __future__ import print_function

import argparse
import os
import re
import subprocess
import sys
import urllib2
import xml.etree.cElementTree as etree

URL_TEMPLATE = "https://addons.mozilla.org/en-US/addon/{ext}/versions/format:rss"
OUTGOING_HREF = re.compile(r'href="https?://outgoing\.mozilla\.org/v\d+/\w+/(.+?)"')
HTML_HEAD = "<html>\n<head><title>{title}</title></head>\n<body>\n"
HTML_FOOT = "</body>\n</html>"

def fix_outgoing_href(match):
    return 'href="%s"' % urllib2.unquote(match.group(1))

def convert_rss_to_html(first, source, target):
    elements = etree.iterparse(source)
    next_url = None
    # header if first page
    if first:
        element = next(elements)[1]
        while element.tag != "title":
            element = next(elements)[1]
        print(HTML_HEAD.format(title=element.text), file=target)
    # items, rel
    for _, element in elements:
        if element.tag == "{http://www.w3.org/2005/Atom}link":
            if element.attrib["rel"] == "next":
                next_url = element.attrib["href"]
            continue
        if element.tag != "item":
            continue
        title = element.find("title").text.encode("utf-8")
        print("<h2>%s</h2>" % title, file=target)
        descel = element.find("description")
        if descel is not None and descel.text:
            desc = descel.text.rstrip("\n").encode("utf-8")
            # process manual line breaks, e.g. adblock-plus
            desc = desc.replace("\n", "\n<br/>").replace("<br/>\n", "<br/>&nbsp;\n")
            # strip outgoing redirect
            desc = OUTGOING_HREF.sub(fix_outgoing_href, desc)
            print(desc, file=target)
        else:
            print("[no description]", file=target)
        print("", file=target)
    # footer if last page
    if not next_url:
        print(HTML_FOOT, file=target)
    return next_url

def which(cmd):
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    for dir in path:
        name = os.path.join(dir, cmd)
        if (os.path.exists(name) and os.access(name, os.F_OK | os.X_OK)
            and not os.path.isdir(name)):
            return name
    return None

def try_external_write(out, args, **kwargs):
    prog = args[0]
    if not which(prog):
        print("failed to write %s: program not found: %s" % (out, prog), file=sys.stderr)
        return False
    try:
        subprocess.check_call(args, **kwargs)
        print("wrote %s" % out, file=sys.stderr)
        return True
    except Exception as e:
        print("failed to write %s: %s" % (out, e), file=sys.stderr)
        return False

def main():
    parser = argparse.ArgumentParser(
        description="Fetch Version History of an addon from the Mozilla "
        "Extensions website and convert it into a human-readable format.")
    parser.add_argument("extension",
        help="Extension short-name, as used on addons.mozilla.org.")
    parser.add_argument("-f", "--html-file",
        metavar="FILE", default="debian/upstream/changelog.html",
        help="File to write to. Default: %(default)s.")
    parser.add_argument("-p", "--plain-format", metavar="FORMAT",
        choices=["text", "markdown", "rst"], default="none",
        help="Generate a human-readable form of the changelog in the file "
        "without the .html extension, using an external program. Possible "
        "options are text (uses lynx(1)), markdown (pandoc(1)), or rst "
        "(pandoc(1)). Default: %(default)s.")
    options = parser.parse_args()

    progname = os.path.basename(sys.argv[0])

    html_file = options.html_file
    if not html_file.endswith(".html"):
        print("%s: Output filename must end with .html: %s" %
            (progname, html_file), file=sys.stderr)
        return 1
    plain_file = html_file[:-5]

    try:
        with open(html_file, "w") as target:
            url = URL_TEMPLATE.format(ext=options.extension)
            first = True
            while url:
                try:
                    source = urllib2.urlopen(url)
                except urllib2.HTTPError as error:
                    print("%s: For extension '%s', error fetching '%s': %s" %
                          (progname, options.extension, url, error), file=sys.stderr)
                    raise
                try:
                    url = convert_rss_to_html(first, source, target)
                    first = False
                finally:
                    source.close()
        print("wrote %s" % html_file, file=sys.stderr)
    except Exception as e:
        print("failed to write %s: %s" % (html_file, e), file=sys.stderr)
        #os.remove(html_file)
        return 1

    if options.plain_format == "text":
        with open(plain_file, "w") as target:
            if not try_external_write(plain_file,
              ["lynx", "-dump", "-list_inline", "-width=84", html_file], stdout=target):
                #os.remove(plain_file)
                return 1
            else:
                # 2 space indent is a bit more reasonable than lynx's 3 default
                # width=84 above (3*2-2) effectively cancels the right margin
                subprocess.call(["sed", "-i", "-e", "s/^   /  /g", plain_file])

    elif options.plain_format == "markdown":
        if not try_external_write(plain_file,
          ["pandoc", "-i", html_file, "--columns=79", "-wmarkdown", "-o", plain_file]):
            return 1

    elif options.plain_format == "rst":
        if not try_external_write(plain_file,
          ["pandoc", "-i", html_file, "--columns=79", "-wrst", "-o", plain_file]):
            return 1
        else:
            # work around https://github.com/jgm/pandoc/issues/1656
            # by adding two spaces to all line-block continuation lines
            subprocess.call(["sed", "-i", "-r",
                "-e", r"/^\|/,/^ |^$/{s/^([^ |])/  \1/g}", plain_file])

    return 0


if __name__ == "__main__":
    sys.exit(main())