Remove BOM dependency on Compose & use explicit versions (#393)

Author: mannodermaus

build-logic/src/main/kotlin/Dependencies.kt

@@ -7,7 +7,7 @@ object libs {
         const val junitVintage = "5.14.0"
         const val junitPlatform = "1.14.0"
 
-        const val composeBom = "2025.03.00"
+        const val compose = "1.7.8"
         const val androidXMultidex = "2.0.1"
         const val androidXTestAnnotation = "1.0.1"
         const val androidXTestCore = "1.6.1"
@@ -60,11 +60,10 @@ object libs {
     const val junitPlatformRunner = "org.junit.platform:junit-platform-runner:${versions.junitPlatform}"
     const val apiguardianApi = "org.apiguardian:apiguardian-api:${versions.apiGuardian}"
 
-    const val composeBom = "androidx.compose:compose-bom:${versions.composeBom}"
-    const val composeUi = "androidx.compose.ui:ui"
-    const val composeUiTooling = "androidx.compose.ui:ui-tooling"
-    const val composeFoundation = "androidx.compose.foundation:foundation"
-    const val composeMaterial = "androidx.compose.material:material"
+    const val composeUi = "androidx.compose.ui:ui:${versions.compose}"
+    const val composeUiTooling = "androidx.compose.ui:ui-tooling:${versions.compose}"
+    const val composeFoundation = "androidx.compose.foundation:foundation:${versions.compose}"
+    const val composeMaterial = "androidx.compose.material:material:${versions.compose}"
     const val composeActivity = "androidx.activity:activity-compose:${versions.activityCompose}"
 
     // Testing
@@ -84,9 +83,9 @@ object libs {
     const val androidXTestRunner = "androidx.test:runner:${versions.androidXTestRunner}"
     const val espressoCore = "androidx.test.espresso:espresso-core:${versions.espresso}"
 
-    const val composeUiTest = "androidx.compose.ui:ui-test"
-    const val composeUiTestJUnit4 = "androidx.compose.ui:ui-test-junit4"
-    const val composeUiTestManifest = "androidx.compose.ui:ui-test-manifest"
+    const val composeUiTest = "androidx.compose.ui:ui-test:${versions.compose}"
+    const val composeUiTestJUnit4 = "androidx.compose.ui:ui-test-junit4:${versions.compose}"
+    const val composeUiTestManifest = "androidx.compose.ui:ui-test-manifest:${versions.compose}"
 
     // Documentation
     // For the latest version refer to GitHub repo neboskreb/instant-task-executor-extension

build-logic/src/main/kotlin/Deployment.kt

@@ -204,16 +204,25 @@ private fun MavenPublication.applyPublicationDetails(
                         .mapValues { entry -> entry.value.filter { it.name != "unspecified" } }
                         .forEach { (scope, dependencies) ->
                             dependencies.forEach { dep ->
+                                // Do not allow BOM dependencies for our own packaged libraries,
+                                // instead its artifact versions should be unrolled explicitly
+                                if ("-bom" in dep.name) {
+                                    throw IllegalArgumentException(
+                                        "Found a BOM declaration in the dependencies of project" +
+                                                "${project.path}: $dep. Prefer declaring its " +
+                                                "transitive artifacts explicitly by " +
+                                                "adding a version contraint to them."
+                                    )
+                                }
+
                                 with(dependenciesNode.appendNode("dependency")) {
                                     if (dep is ProjectDependency) {
                                         appendProjectDependencyCoordinates(dep)
                                     } else {
                                         appendExternalDependencyCoordinates(dep)
                                     }
 
-                                    // Rewrite scope definition for BOM dependencies
-                                    val isBom = "-bom" in dep.name
-                                    appendNode("scope", if (isBom) "import" else scope)
+                                    appendNode("scope", scope)
                                 }
                             }
                         }

instrumentation/compose/build.gradle.kts

@@ -74,7 +74,6 @@ dependencies {
   implementation(libs.junit4)
   implementation(libs.espressoCore)
 
-  implementation(platform(libs.composeBom))
   implementation(libs.composeActivity)
   implementation(libs.composeUi)
   implementation(libs.composeUiTooling)