Support regex in ignoreList

plugin/src/main/java/com/google/secrets_plugin/SecretsPlugin.kt

@@ -5,7 +5,11 @@ import org.gradle.api.Project
 
 /**
  * Plugin that reads secrets from a properties file and injects manifest build and BuildConfig
- * variables into an Android project.
+ * variables into an Android project. Since property keys are turned into Java variables,
+ * invalid variable characters from the property key are removed.
+ *
+ * e.g.
+ * A key defined as "sdk.dir" in the properties file will be converted to "sdkdir".
  */
 class SecretsPlugin : Plugin<Project> {
 
@@ -25,10 +29,12 @@ class SecretsPlugin : Plugin<Project> {
                     extension.propertiesFileName
                 )
 
+                val ignoreRegexs = extension.ignoreList.map { Regex(pattern = it) }
+
                 properties.keys.map { key ->
                     key as String
                 }.filter { key ->
-                    key.isNotEmpty() && !extension.ignoreList.contains(key)
+                    key.isNotEmpty() && !ignoreRegexs.any { it.containsMatchIn(key) }
                 }.forEach { key ->
                     val value = properties.getProperty(key)
                     val translatedKey = key.replace(javaVarRegexp, "")

sample-app/build.gradle.kts

@@ -25,6 +25,7 @@ android {
 
 dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.10")
+    implementation("com.google.android.material:material:1.2.1")
     implementation("androidx.appcompat:appcompat:1.2.0")
 }
 
@@ -36,4 +37,5 @@ secrets {
 
     // Add keys that the plugin should ignore from the properties file
     ignoreList.add("keyToIgnore")
+    ignoreList.add("ignore*")
 }

secrets.properties

@@ -2,3 +2,6 @@
 # This file is checked into version control for the sake of demonstrating sample contents.
 # In practice, your properties file that contains secrets *should not* be under version control.
 gmpApiKey="API_KEY_VALUE"
+keyToIgnore="This key is ignored"
+ignoreKey1="This key is ignored"
+ignoreKey2="This key is ignored, too"