Analysis split, merge, rebase and reload operations fail when name hashing is enabled

[gkossakowski]

This is reflected by test failures:

[info] analysis/merge
[info]  + ! zinc -status
[info]  + zinc -nailed -analysis-cache analysis/a -d classes a/A.scala
[info]  + zinc -nailed -analysis-cache analysis/b -d classes b/B.scala
[info]  + zinc -nailed -analysis-cache analysis/c -d classes c/C.scala
[error] ! zinc -nailed -analysis -cache analysis/abc -merge analysis/a:analysis/b:analysis/c
[error]   /Users/grek/scala/zinc/src/scriptit/analysis/merge/test:11
[error]   [error] Merging of Analyses that have`relations.memberRefAndInheritanceDeps` set to `true` is not supported.

[error] ! zinc -nailed -analysis -cache a2 -rebase c1:c2
[error]   /Users/grek/scala/zinc/src/scriptit/analysis/rebase/test:11
[error]   [error] The `direct` source dependencies relation is not supported when `nameHashing` flag is disabled.

[error] ! zinc -nailed -analysis -cache a1 -rebase c1:c2
[error]   /Users/grek/scala/zinc/src/scriptit/analysis/reload/test:15
[error]   [error] The `direct` source dependencies relation is not supported when `nameHashing` flag is disabled.

[error] ! zinc -nailed -analysis -cache analysis/abc -split a:analysis/a,b:analysis/b,c:analysis/c
[error]   /Users/grek/scala/zinc/src/scriptit/analysis/split/test:7
[error]   [error] Grouping of Analyses that have`relations.memberRefAndInheritanceDeps` set to `true` is not supported.

[gkossakowski]

The workaround is to use no-name-hashing option that is being introduced in #70.

[gkossakowski]

The issue will be mentioned in release notes for zinc 0.3.6 and 0.3.7.

[benjyw]

We don't use the split/merge/rebase functionality in zinc due to performance and correctness issues. We implemented our own in python which performs a lot better because it operates purely on text, instead of hydrating a huge JVM object graph.

[benjyw]

To clarify: I believe that those features were added for our (Pants) use, and we are fine with those features being removed entirely.

[gkossakowski]

I see. Thanks for the info!