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From tliron <>
Subject [GitHub] incubator-ariatosca pull request #100: ARIA-140 Version utils
Date Mon, 08 May 2017 15:48:44 GMT
Github user tliron commented on a diff in the pull request:
    --- Diff: aria/utils/ ---
    @@ -0,0 +1,162 @@
    +# Licensed to the Apache Software Foundation (ASF) under one or more
    +# contributor license agreements.  See the NOTICE file distributed with
    +# this work for additional information regarding copyright ownership.
    +# The ASF licenses this file to You under the Apache License, Version 2.0
    +# (the "License"); you may not use this file except in compliance with
    +# the License.  You may obtain a copy of the License at
    +# Unless required by applicable law or agreed to in writing, software
    +# distributed under the License is distributed on an "AS IS" BASIS,
    +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    +# See the License for the specific language governing permissions and
    +# limitations under the License.
    +General-purpose version string handling
    +import re
    +_INF = float('inf')
    +_NULL = (), _INF
    --- End diff --
    Because "Numeric qualifiers will always be greater than prefixed integer qualifiers, e.g.
"1.1-1" > "1.1-beta1". The qualifier is a float that is an extra, but if the qualifier
is not present "infinity" should always win over it. It shouldn't matter what's "more natural"
seeming: this is an underscored internal var that's never seen by users of the lib. Users
instead use `VersionString.NULL` or can init `VersionString` with None.

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