Add support for DATABASE_URL values with mariadb scheme

CHANGELOG.md

@@ -10,6 +10,10 @@
 
 * The buildpack output will now explicitly mention the installed OpenJDK version instead of displaying only the major version. ([#339](https://github.com/heroku/heroku-buildpack-jvm-common/pull/339)
 
+### Added
+
+* Support for `DATABASE_URL` values that use the `mariadb` scheme. ([#000](https://github.com/heroku/heroku-buildpack-jvm-common/pull/000)
+
 ## [v159] - 2025-02-17
 
 ### Changed

opt/jdbc.sh

@@ -62,6 +62,9 @@ set_jdbc_url() {
 		"mysql")
 			modified_schema="jdbc:mysql"
 			;;
+		"mariadb")
+			modified_schema="jdbc:mariadb"
+			;;
 		*)
 			# We don't handle database URLs that aren't mysql or postgres.
 			# But we also don't consider this an error and silently exit.

test/jdbc.sh

@@ -82,6 +82,23 @@ testMySQLDatabaseEnvVar() {
 	)
 }
 
+testMariaDBDatabaseEnvVar() {
+	(
+		set -e # Exit subshell after failed command, important to make multi-assert tests work properly
+
+		# Circle CI sets this environment variable. It causes trouble since the JDBC code checks this variable to see if it
+		# is running on Heroku CI and generates different urls in such cases, causing some tests to fail.
+		unset CI
+
+		export DATABASE_URL="mariadb://foo:bar@ec2-0-0-0-0:5432/abc123?reconnect=true"
+
+		# shellcheck disable=SC1090
+		source "$JDBC_SCRIPT_LOCATION"
+
+		assertEquals "jdbc:mariadb://ec2-0-0-0-0:5432/abc123?password=bar&reconnect=true&user=foo" "$JDBC_DATABASE_URL"
+	)
+}
+
 testThirdPartyDatabaseUrls() {
 	(
 		set -e # Exit subshell after failed command, important to make multi-assert tests work properly

test/spec/java_spec.rb

@@ -61,7 +61,7 @@
   '.profile.d/jvmcommon.sh' => 'f4727529254d7e5bd9f7de2ec110bffe',
   '.profile.d/default-proc-warning.sh' => 'bb7cd4e1747e2a0c0e9a7137e84d3cf5',
   '.profile.d/heroku-jvm-metrics.sh' => '9f48b384bc3d9161e45e15906793b191',
-  '.profile.d/jdbc.sh' => '7a5ce665af22b057c027b1080d2df3d3',
+  '.profile.d/jdbc.sh' => '7a2abf4a9aaec0b98e3681fbc2d4d215',
   '.profile.d/jvm-redis.sh' => '7873896b3392a91b35af7dcfad115d6b',
   '.heroku/with_jmap/bin/java' => 'adc9d1e5abbc1b39d56dc37ce3e26ab8',
   '.heroku/with_jmap_and_jstack/bin/java' => '5dbd18ed94a0b1f3542ab100f88fd47d',