Kapil Arya created MESOS-1987:
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Summary: Add better support for handling arbitrary long versions
strings in stout/versio.hpp
Key: MESOS-1987
URL: https://issues.apache.org/jira/browse/MESOS-1987
Project: Mesos
Issue Type: Bug
Reporter: Kapil Arya
Assignee: Kapil Arya
Currently, the Version class handles strings of the form X.Y.Z only. A recent
patch (https://reviews.apache.org/r/27115/) allows for strings of the form
X.Y.Z-* by discarding the "-" along with the rest of the string following it.
This means that the check `Version("0.20.1") == Version("0.20.1-rc2")` will
succeed.
A better fix is to allow arbitrary number of components in the Version string
and still do the right thing w.r.t. comparisons. To standardize it a bit, we
can consider Semantic Versioning (http://semver.org/).
Semantic Versioning allows for strings of the following tagformat:
<code>
"MAJOR.MINOR.PATCH-IDENTIFIER[.IDENTIFIER]*"
</code>
An IDENTIFIER must comprise only ASCII alphanumerics and hyphen [0-9A-Za-z-].
One way to implement it in the Version class is to keep a vector of (string)
identifiers along with major, minor, and patch variable. Another alternative is
to not have the major, minor, and patch variables and just have a single vector
of strings.
The comparison can be tricky. One has to consider the pre-release version,
etc. as explained in SemVer 2.0.0 RFC.
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