Don't use versions that only consist of a hash.

[mzuehlke]

@fthomas do you think this is too drastic

Fixes #2483

[codecov]

Codecov Report

Merging #2498 (ce59944) into main (c6c77af) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2498      +/-   ##
==========================================
+ Coverage   81.19%   81.22%   +0.02%     
==========================================
  Files         142      142              
  Lines        2489     2514      +25     
  Branches       55       48       -7     
==========================================
+ Hits         2021     2042      +21     
- Misses        468      472       +4     

Impacted Files	Coverage Δ
...ain/scala/org/scalasteward/core/data/Version.scala	100.00% <100.00%> (ø)
...rg/scalasteward/core/edit/hooks/HookExecutor.scala	90.27% <0.00%> (-3.60%)	⬇️

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[fthomas]

do you think this is too drastic

I'm not sure. It would prevent updates with very long versions that only consists of digits and are not dates. For example, a bump like 10000000 -> 20000000 would be prevented. If we change it slightly from v.isOnlyHash to isOnlyHash =!= v.isOnlyHash (or even !isOnlyHash && v.isOnlyHash), we would allow this bump but still prevent things like 1.4.12 -> 1032048a.

[fthomas]

Here is the next challenge: spotify/scio#4235 - a bump from 1.4.12 to 7d2bf0af+20171218-1522 ;-)

Maybe we should redefine containsHash such that it does not require a leading separator. 🤔