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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">#!/usr/libexec/platform-python

&quot;&quot;&quot;
Automatic dependency generator for Node.js libraries.

Parsed from package.json.  See `man npm-json` for details.
&quot;&quot;&quot;

# Copyright 2012, 2013 T.C. Hollingsworth &lt;tchollingsworth@gmail.com&gt;
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the &quot;Software&quot;), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

from __future__ import unicode_literals
import json
import os
import re
import subprocess
import sys

RE_VERSION = re.compile(r&#039;\s*v?([&lt;&gt;=~^]{0,2})\s*([0-9][0-9\.\-]*)\s*&#039;)

def main():
    #npm2rpm uses functions here to write BuildRequires so don&#039;t print anything
    #until the very end
    deps = []

    #it&#039;s highly unlikely that we&#039;ll ever get more than one file but we handle
    #this like all RPM automatic dependency generation scripts anyway
    paths = [path.rstrip() for path in sys.stdin.readlines()]

    for path in paths:
        if not path.endswith(&#039;package.json&#039;):
            continue

        # we only want the package.json in the toplevel module directory
        pathparts = path.split(os.sep)
        if not pathparts[-5:-2] == [&#039;usr&#039;, &#039;lib&#039;, &#039;node_modules&#039;]:
            continue

        fh = open(path)
        metadata = json.load(fh)
        fh.close()

        #write out the node.js interpreter dependency
        req = &#039;alt-nodejs18-nodejs(engine)&#039;

        if &#039;engines&#039; in metadata and isinstance(metadata[&#039;engines&#039;], dict) \
                                            and &#039;node&#039; in metadata[&#039;engines&#039;]:
            deps += process_dep(req, metadata[&#039;engines&#039;][&#039;node&#039;])
        else:
            deps.append(req)

        if &#039;dependencies&#039; in metadata:
            if isinstance(metadata[&#039;dependencies&#039;], dict):
                for name, version in metadata[&#039;dependencies&#039;].iteritems():
                    req = &#039;alt-nodejs18-npm(&#039; + name + &#039;)&#039;
                    deps += process_dep(req, version)
            elif isinstance(metadata[&#039;dependencies&#039;], list):
                for name in metadata[&#039;dependencies&#039;]:
                    req = &#039;alt-nodejs18-npm(&#039; + name + &#039;)&#039;
                    deps.append(req)
            elif isinstance(metadata[&#039;dependencies&#039;], basestring):
                req = &#039;alt-nodejs18-npm(&#039; + metadata[&#039;dependencies&#039;] + &#039;)&#039;
                deps.append(req)
            else:
                raise TypeError(&#039;invalid package.json: dependencies not a valid type&#039;)

    print &#039;\n&#039;.join(deps)

    # invoke the regular RPM requires generator
    p = subprocess.Popen([&#039;/usr/lib/rpm/find-requires&#039;], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
    print p.communicate(input=&#039;\n&#039;.join(paths))[0]

def process_dep(req, version):
    &quot;&quot;&quot;Converts an individual npm dependency into RPM dependencies&quot;&quot;&quot;

    deps = []

    #there&#039;s no way RPM can do anything like an OR dependency
    if &#039;||&#039; in version:
        sys.stderr.write(&quot;WARNING: The {0} dependency contains an &quot;.format(req) +
            &quot;OR (||) dependency: &#039;{0}.\nPlease manually include &quot;.format(version) +
            &quot;a versioned dependency in your spec file if necessary&quot;)
        deps.append(req)

    elif &#039; - &#039; in version:
        gt, lt = version.split(&#039; - &#039;)
        deps.append(req + &#039; &gt;= &#039; + gt)
        deps.append(req + &#039; &lt;= &#039; + lt)

    else:
        m = re.match(RE_VERSION, version)

        if m:
            deps += convert_dep(req, m.group(1), m.group(2))

            #There could be up to two versions here (e.g.&quot;&gt;1.0 &lt;3.1&quot;)
            if len(version) &gt; m.end():
                m = re.match(RE_VERSION, version[m.end():])

                if m:
                    deps += convert_dep(req, m.group(1), m.group(2))
        else:
            deps.append(req)

    return deps

def convert_dep(req, operator, version):
    &quot;&quot;&quot;Converts one of the two possibly listed versions into an RPM dependency&quot;&quot;&quot;

    deps = []

    #any version will do
    if not version or version == &#039;*&#039;:
        deps.append(req)

    #any prefix but ~ makes things dead simple
    elif operator in [&#039;&gt;&#039;, &#039;&lt;&#039;, &#039;&lt;=&#039;, &#039;&gt;=&#039;, &#039;=&#039;]:
        deps.append(&#039; &#039;.join([req, operator, version]))

    #oh boy, here we go...
    else:
        #split the dotted portions into a list (handling trailing dots properly)
        parts = [part if part else &#039;x&#039; for part in version.split(&#039;.&#039;)]
        parts = [int(part) if part != &#039;x&#039; and not &#039;-&#039; in part
                                                    else part for part in parts]

        # 1 or 1.x or 1.x.x or ~1 or ^1
        if len(parts) == 1 or parts[1] == &#039;x&#039;:
            if parts[0] != 0:
                deps.append(&#039;{0} &gt;= {1}&#039;.format(req, parts[0]))
            deps.append(&#039;{0} &lt; {1}&#039;.format(req, parts[0]+1))

        # 1.2.3 or 1.2.3-4 or 1.2.x or ~1.2.3 or ^1.2.3 or 1.2
        elif len(parts) == 3 or operator != &#039;~&#039;:
            # 1.2.x or 1.2
            if len(parts) == 2 or parts[2] == &#039;x&#039;:
                deps.append(&#039;{0} &gt;= {1}.{2}&#039;.format(req, parts[0], parts[1]))
                deps.append(&#039;{0} &lt; {1}.{2}&#039;.format(req, parts[0], parts[1]+1))
            # ~1.2.3 or ^0.1.2 (zero is special with the caret operator)
            elif operator == &#039;~&#039; or (operator == &#039;^&#039; and parts[0] == 0 and parts[1] &gt; 0):
                deps.append(&#039;{0} &gt;= {1}&#039;.format(req, version))
                deps.append(&#039;{0} &lt; {1}.{2}&#039;.format(req, parts[0], parts[1]+1))
            #^1.2.3
            elif operator == &#039;^&#039; and parts[0:1] != [0,0]:
                deps.append(&#039;{0} &gt;= {1}&#039;.format(req, version))
                deps.append(&#039;{0} &lt; {1}&#039;.format(req, parts[0]+1))
            # 1.2.3 or 1.2.3-4 or ^0.0.3
            else:
                deps.append(&#039;{0} = {1}&#039;.format(req, version))

        # ~1.2
        elif operator == &#039;~&#039;:
            deps.append(&#039;{0} &gt;= {1}&#039;.format(req, version))
            deps.append(&#039;{0} &lt; {1}&#039;.format(req, parts[0]+1))

        #^1.2
        elif operator == &#039;^&#039;:
            deps.append(&#039;{0} &gt;= {1}&#039;.format(req, version))
            deps.append(&#039;{0} &lt; {1}&#039;.format(req, parts[0]+1))


    return deps

if __name__ == &#039;__main__&#039;:
    main()
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