#1625 fix transformer not picked up

[borissmidt]

fixes related issue #1625
It was easy to resolve the missing package context file by passing all files that need to be generated to protoc at once.
This is similar how sbt and gradle use protoc to compile the sources.

[lefou]

Thanks for your contribution! Please avoid reformatting unchanged lines, but if, please use Scalafmt with our config.

[lefou]

Thanks. Looks good now! 👍

[borissmidt]

I might come back with another PR because i have projects with multiple modules that depend on each and they all do scalaPB.
So i'm not sure if this will handle 'transititive' scalapb options.

[borissmidt]

Ah damn i just found 1 bug i have to add

          compiler.compileScalaPB(inputDir.toIO, files, scalaPBOptions, dest.toIO, scalaPBCExtraArgs)
        }
        ```
        otherwise we get an error if there is no file

[lefou]

@borissmidt Best is to add a test case to reproduce the bug and open a new PR with the test and it's fix.

[borissmidt]

Yes indeed i just couldn't fix my initial problem that scalapb.options on package scope level of other projects and probably jars are not picked up.
So i think this is a bigger problem within scalapb.