Pub allows leading zeros in versions, semantic versioning does not

[dart-lang]

Pub allows leading zeros in versions, semantic versioning does not

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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I recall we had to add some special case support in the Dart code for pub to handle this, but I don't remember exactly why. I think support for leading zeroes may have initially been a bug in pub that we then had to deliberately support for backwards compatibility.

Natalie might remember the details. If not, I can dig through the commit history.

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cc @nex3.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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For reasons I can get into further if you're curious, Pub supports semantic versioning 2.0.0-rc.1 (http://semver.org/spec/v2.0.0-rc.1.html), which has nothing in particular to say about leading zeros. The pub_semver package treats them as identical to versions without leading zeros, but will display them with the leading zeros. Can the server use the "display version" for linking?