Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/5471#discussion_r28195830
--- Diff: project/SparkBuild.scala ---
@@ -420,6 +422,16 @@ object Unidoc {
)
}
+object Scalastyle {
--- End diff --
I've been trying to futz with this for a while, and I'm pretty stuck too.
I've tried assorted permutations and I can't get it to work -- *unless* I put a
`build.sbt` file in *every* project sub-project, which just has:
```
scalastyleConfig := file("dev/scalastyle-config.xml")
```
What I find really strange is that nothing I did in `SparkBuild.scala`
takes effect -- but I can modify the location interactively in the console. If
I go into a subproject, and then run
```
set scalastyleConfig := file("dev/scalastyle-config.xml")
```
then I can run `scalastyle` in that project and it will pick up the right
settings. However, doing this once in the project root does **not** effect all
of the sub-projects. You have to do it in each project separately.
I came up with the solution for using the `build.sbt` file in each project,
just by applying that solution in the shell, and then executing `session save`,
which creates that file. Miraculously the settings really were saved -- run
sbt again, and now each project has the right scalastyle settings.
That might be too hacky & convoluted to be worth this change ... but maybe
it will give somebody else a clue to what is going on here ...
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