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On the Meaning of Version Numbers
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Hynek Schlawack
April 25, 2020
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On the Meaning of Version Numbers
Hynek Schlawack
April 25, 2020
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Transcript
Hynek Schlawack On the Meaning of Version Numbers @hynek
Semantic Versioning @hynek
1.2.3 micro @hynek
1.2.3 minor micro @hynek
1.2.3 major minor micro @hynek
SemVer is a poor choice for most projects. @hynek
SemVer doesn’t deliver on its promises. @hynek
“I can choose to only get bugfixes.” https://xkcd.com/1172/ @hynek Hyrum’s
Law
Very few open source projects have the resources to maintain
more than one release branch (properly). “I can choose to only get bugfixes.” @hynek
If You Pin Major Version In Your Applications @hyne
-No security updates. If You Pin Major Version In Your
Applications @hyne
-No security updates. -The longer you wait, the harder it
gets. If You Pin Major Version In Your Applications @hyne
@hynek If You Pin Major Version In Your Public Package
your-pkg urllib3 1.25.9
@hynek If You Pin Major Version In Your Public Package
your-pkg urllib3 1.25.9 User’s App
@hynek If You Pin Major Version In Your Public Package
your-pkg urllib3 1.25.9 User’s App <2.0
@hynek If You Pin Major Version In Your Public Package
your-pkg urllib3 1.25.9 User’s App <2.0 2.0.0
@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
@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
@hynek
1. Have tests. @hynek
1. Have tests. 2. Pin your dependencies. @hynek
1. Have tests. 2. Pin your dependencies. 3. Try to
update dependencies. @hynek
1. Have tests. 2. Pin your dependencies. 3. Try to
update dependencies. 4. See if tests still pass. @hynek
1. Have tests. 2. Pin your dependencies. 3. Try to
update dependencies. 4. See if tests still pass. 5. GOTO 3 @hynek
Almost nobody does SemVer correctly. @hynek
https://0ver.org @hynek
A concept that most people get wrong is not a
useful concept for most people. @hynek
SemVer is a poor choice for most projects. @hynek
Acceptance @hynek
@hynek
Calendar Versioning @hynek
• Toyota 2020 Yaris • pip 20.0.2 • Ubuntu 20.04
• certifi 2020.4.5.1 @hynek
Takeaways @hynek
Takeaways •Don’t believe the promises of SemVer. @hynek
Takeaways •Don’t believe the promises of SemVer. •Don’t do SemVer
if you’re afraid to increment major. @hynek
Takeaways •Don’t believe the promises of SemVer. •Don’t do SemVer
if you’re afraid to increment major. •Try CalVer! @hynek
@hynek CalVer.org vrmd.de