Post update hooks have no effect

[MaciejG604]

In the scala-cli repo we have updated our .scala-steward.conf to include:

postUpdateHooks = [{
  command = ["./mill", "-i", "generate-reference-doc.run"],
  commitMessage = "Generate the reference doc"
}]

However, no commits with this message are ever generated e.g. here.
After setting up a separate steward-running repo, the hooks are launched correctly e.g. here.

[alejandrohdezma]

Hey @MaciejG604, is that command generating new files our updating old ones? Because if that's the case I believe given this new files won't be added, and thus, a commit won't be created.

[MaciejG604]

Hi, it should only update files that already exists, nothing new added.

[alejandrohdezma]

🤔 Could you run Steward in debug mode to get more clarity onto what's happening?

[MaciejG604]

How do I do that?

[alejandrohdezma]

If you are using the Scala Steward GitHub Action, check Run Scala Steward with step debug logging under Guides.

[fthomas]

I tried this locally with my dev instance and the post-update hook failed with:

2025-01-27 08:32:13,287 INFO  Process update com.github.plokhotnyuk.jsoniter-scala:{(jsoniter-scala-core, jsoniter-scala-core_2.12, jsoniter-scala-core_2.13, jsoniter-scala-core_3), (jsoniter-scala-macros, jsoniter-scala-macros_2.12, jsoniter-scala-macros_2.13, jsoniter-scala-macros_3)} : 2.13.5.2 -> 2.13.39
2025-01-27 08:32:13,674 INFO  Create branch update/jsoniter-scala-core-2.13.39
2025-01-27 08:32:20,758 INFO  Executing post-update hook for com.github.plokhotnyuk.jsoniter-scala:jsoniter-scala-core with command './mill -i 'generate-reference-doc[]'.run'
2025-01-27 08:32:53,856 WARN  Post-update hook failed
org.scalasteward.core.io.process$ProcessFailedException: './mill -i 'generate-reference-doc[]'.run' exited with code 1.
[info] compiling 6 Scala sources to workspace/repos/VirtusLab/scala-cli/out/mill-build/compile.dest/classes ...
[warn] workspace/repos/VirtusLab/scala-cli/project/settings.sc:543:57: trait SbtModuleTests in trait SbtModule is deprecated (since Mill 0.11.10): Use SbtTests instead
[warn]   trait ScalaCliTests extends ScalaCliModule with super.SbtModuleTests with TestModule.Munit {
[warn]                                                         ^
[warn] workspace/repos/VirtusLab/scala-cli/project/settings.sc:578:15: method publish in class LocalIvyPublisher is deprecated (since Mill 0.11.7): Use publishLocal instead
[warn]     publisher.publish(
[warn]               ^
[warn] two warnings found
[info] done compiling
Parsing exception Position 1:1, found "'generate-"

Running the command in the shell works just fine but I can reproduce the above error with a simple Scala script:

$ cat run.sc 
val pb = new java.lang.ProcessBuilder("./mill", "-i", "'generate-reference-doc[]'.run")
pb.inheritIO
pb.start
$ scala-cli run run.sc 
[build.sc] [50/59] zincReportCachedProblems 
Parsing exception Position 1:1, found "'generate-"

Maybe the public Scala Steward instance fails with the same error. And I've no idea why that does not happen with the GH Action.

[fthomas]

It works for me if the single quotes around generate-reference-doc[] are removed:

 postUpdateHooks = [{
-  command = ["./mill", "-i", "'generate-reference-doc[]'.run"],
+  command = ["./mill", "-i", "generate-reference-doc[].run"],
   commitMessage = "Generate the reference doc"
 }]

Please give this a try, @MaciejG604.