Ensure shellcheck tasks run when library scripts are changed

The library scripts were not part of the task inputs and so they were not
considered when doing up-to-date checks and when calculating the cache key.
This means the shellcheck tasks could be skipped if the only script changes
were to the library inptus.

Author: jthurne

build.gradle.kts

@@ -171,6 +171,9 @@ tasks.named("assemble") {
 tasks.register<Shellcheck>("shellcheckGradleScripts") {
     group = "verification"
     description = "Perform quality checks on Gradle build validation scripts using Shellcheck."
+    inputs.files(copyGradleScripts.get().outputs.files.asFileTree.matching {
+        include("**/*.sh")
+    })
     sourceFiles = copyGradleScripts.get().outputs.files.asFileTree.matching {
         include("**/*.sh")
         exclude("lib/")
@@ -186,6 +189,9 @@ tasks.register<Shellcheck>("shellcheckGradleScripts") {
 tasks.register<Shellcheck>("shellcheckMavenScripts") {
     group = "verification"
     description = "Perform quality checks on Maven build validation scripts using Shellcheck."
+    inputs.files(copyMavenScripts.get().outputs.files.asFileTree.matching {
+        include("**/*.sh")
+    })
     sourceFiles = copyMavenScripts.get().outputs.files.asFileTree.matching {
         include("**/*.sh")
         exclude("lib/")