Create exercise versioning policy based on Haskell track

[tejasbubane]

Exercism tracking issue: https://github.com/exercism/exercism/issues/4786

• haskell: https://github.com/exercism/haskell/pull/717/files#diff-c6795c529069232683d979cd4239c219R2
• ocaml: Create exercise versioning policy based on Haskell track ocaml#283
• javascript: Create exercise versioning policy based on Haskell track #628

Note: This is not the same as exercism/exercism#4266 which removed tracking versions from the user code.

Proposed implementation for JavaScript

In package.json change the version number to match the x.y.z of test data versioning, and add .q which we always increment if a change is made without a sync (new test data): x.y.z.q.

[tejasbubane]

@SleeplessByte For now I suggest not adding extra .q and matching with test data versions. This is ofcourse assuming that our tests will match test data exactly and we won't be needing any extra tests.

[tejasbubane]

Sorry for not being clear with the issue description. Better late than never if anyone else ends up here.

The issue here is not all exercises in this track are in sync with problem specifications. Some (if not most) lag behind and miss some tests or have old version of tests. We need to take this case by case basis and do the following:

• If all tests match, just update version number and we should be good.
• If tests don't match, make the changes required to match them and then update the version number.

I would expect separate PRs with a few exercises - not more than 3-4 in one PR so that it is easy to review.

[SleeplessByte]

@tejasbubane yep! I'll make a checklist too.

[smb26]

Can I have it please? 😄

[SleeplessByte]

@smb26 ❤️ of course. Could you start by opening another issue with at least the ones you're doing but preferably all the exercises as a checkbox (like I did with #600) and name it:

#Checklist: add exercise versioning

Note the steps are listed here: #628 (comment)

[SleeplessByte]

@tejasbubane any update on the makefile change to remove the version / replace it with 0.0.0 when doing the integrity check (when running make test-travis as well as merging the current version into the copy when running make?

[sshine]

Haskell's versioning policy was decided in exercism/haskell#522, implemented in exercism/haskell#523 and documented in exercism/haskell#716. In particular, the main benefit of having a fourth serial version number is that you can track changes to any part of the exercise files given to a user.

Having only the canonical version means you can keep the exercise up-to-date with canonical tests.