On the Meaning of Version Numbers

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Hynek Schlawack On the Meaning of Version Numbers @hynek

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Semantic Versioning @hynek

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1.2.3 micro @hynek

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1.2.3 minor micro @hynek

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1.2.3 major minor micro @hynek

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SemVer is a poor choice for most projects. @hynek

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SemVer doesn’t deliver on its promises. @hynek

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“I can choose to only get bugfixes.” https://xkcd.com/1172/ @hynek Hyrum’s Law

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Very few open source projects have the resources to maintain more than one release branch (properly). “I can choose to only get bugfixes.” @hynek

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If You Pin Major Version In Your Applications @hyne

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-No security updates. If You Pin Major Version In Your Applications @hyne

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-No security updates. -The longer you wait, the harder it gets. If You Pin Major Version In Your Applications @hyne

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@hynek If You Pin Major Version In Your Public Package your-pkg urllib3 1.25.9

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@hynek If You Pin Major Version In Your Public Package your-pkg urllib3 1.25.9 User’s App

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@hynek If You Pin Major Version In Your Public Package your-pkg urllib3 1.25.9 User’s App <2.0

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@hynek If You Pin Major Version In Your Public Package your-pkg urllib3 1.25.9 User’s App <2.0 2.0.0

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@hynek If You Pin Major Version In Your Public Package your-pkg urllib3 1.25.9 User’s App <2.0 other- pkg >2.0 2.0.0

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@hynek If You Pin Major Version In Your Public Package your-pkg urllib3 1.25.9 User’s App <2.0 other- pkg >2.0 Conﬂict! 2.0.0

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@hynek

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1. Have tests. @hynek

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1. Have tests. 2. Pin your dependencies. @hynek

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1. Have tests. 2. Pin your dependencies. 3. Try to update dependencies. @hynek

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1. Have tests. 2. Pin your dependencies. 3. Try to update dependencies. 4. See if tests still pass. @hynek

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1. Have tests. 2. Pin your dependencies. 3. Try to update dependencies. 4. See if tests still pass. 5. GOTO 3 @hynek

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Almost nobody does SemVer correctly. @hynek

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https://0ver.org @hynek

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A concept that most people get wrong is not a useful concept for most people. @hynek

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SemVer is a poor choice for most projects. @hynek

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Acceptance @hynek

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@hynek

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Calendar Versioning @hynek

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• Toyota 2020 Yaris • pip 20.0.2 • Ubuntu 20.04 • certiﬁ 2020.4.5.1 @hynek

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Takeaways @hynek

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Takeaways •Don’t believe the promises of SemVer. @hynek

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Takeaways •Don’t believe the promises of SemVer. •Don’t do SemVer if you’re afraid to increment major. @hynek

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Takeaways •Don’t believe the promises of SemVer. •Don’t do SemVer if you’re afraid to increment major. •Try CalVer! @hynek

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@hynek CalVer.org vrmd.de