fix(server): correctly generate maven-metadata.xml for nested actions (#1367)

Part of #1318.

Author: krzema12

.github/workflows/bindings-server.main.kts

@@ -27,6 +27,7 @@ import kotlin.time.TimeSource
 val DOCKERHUB_USERNAME by Contexts.secrets
 val DOCKERHUB_PASSWORD by Contexts.secrets
 val TRIGGER_IMAGE_PULL by Contexts.secrets
+val GITHUB_TOKEN by Contexts.secrets
 
 @OptIn(ExperimentalKotlinLogicStep::class)
 workflow(
@@ -41,6 +42,9 @@ workflow(
         id = "end-to-end-test",
         name = "End-to-end test",
         runsOn = UbuntuLatest,
+        env = linkedMapOf(
+            "GITHUB_TOKEN" to expr { GITHUB_TOKEN },
+        ),
     ) {
         uses(action = Checkout())
         uses(action = ActionsSetupGradle())
@@ -79,6 +83,15 @@ workflow(
                 .github/workflows/test-script-consuming-jit-bindings.main.kts
             """.trimIndent(),
         )
+
+        run(
+            name = "Fetch maven-metadata.xml for top-level action",
+            command = "curl --fail http://localhost:8080/binding/actions/checkout/maven-metadata.xml",
+        )
+        run(
+            name = "Fetch maven-metadata.xml for nested action",
+            command = "curl --fail http://localhost:8080/binding/actions/cache__save/maven-metadata.xml",
+        )
     }
 
     job(

.github/workflows/bindings-server.yaml

@@ -27,6 +27,8 @@ jobs:
     runs-on: 'ubuntu-latest'
     needs:
     - 'check_yaml_consistency'
+    env:
+      GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
     steps:
     - id: 'step-0'
       uses: 'actions/checkout@v4'
@@ -43,6 +45,12 @@ jobs:
       run: |-
         mv .github/workflows/test-script-consuming-jit-bindings.main.do-not-compile.kts .github/workflows/test-script-consuming-jit-bindings.main.kts
         .github/workflows/test-script-consuming-jit-bindings.main.kts
+    - id: 'step-5'
+      name: 'Fetch maven-metadata.xml for top-level action'
+      run: 'curl --fail http://localhost:8080/binding/actions/checkout/maven-metadata.xml'
+    - id: 'step-6'
+      name: 'Fetch maven-metadata.xml for nested action'
+      run: 'curl --fail http://localhost:8080/binding/actions/cache__save/maven-metadata.xml'
   deploy:
     name: 'Deploy to DockerHub'
     runs-on: 'ubuntu-latest'

maven-binding-builder/src/main/kotlin/io/github/typesafegithub/workflows/mavenbinding/MavenMetadataBuilding.kt

@@ -22,14 +22,14 @@ internal suspend fun buildMavenMetadataFile(
             .withZone(ZoneId.systemDefault())
             .format(Instant.now())
     val availableMajorVersions =
-        fetchAvailableVersions(owner = owner, name = name, githubToken = githubToken)
+        fetchAvailableVersions(owner = owner, name = name.substringBefore("__"), githubToken = githubToken)
             .filter { it.removePrefix("v").toIntOrNull() != null }
     val newest = availableMajorVersions.maxBy { it.removePrefix("v") }
     return """
         <?xml version="1.0" encoding="UTF-8"?>
         <metadata>
           <groupId>$owner</groupId>
-          <artifactId>$name</artifactId>
+          <artifactId>${name.replace("__", "/")}</artifactId>
           <versioning>
             <latest>$newest</latest>
             <release>$newest</release>