Polish "Log a warning when using fallback for pid and log locations"

Closes gh-14519

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script

@@ -67,8 +67,8 @@ echoYellow() { echo $'\e[0;33m'"$1"$'\e[0m'; }
 [[ -z "$LOG_FOLDER" ]] && LOG_FOLDER="{{logFolder:/var/log}}"
 ! [[ "$PID_FOLDER" == /* ]] && PID_FOLDER="$(dirname "$jarfile")"/"$PID_FOLDER"
 ! [[ "$LOG_FOLDER" == /* ]] && LOG_FOLDER="$(dirname "$jarfile")"/"$LOG_FOLDER"
-! [[ -x "$PID_FOLDER" ]] && echoYellow "Warning: PID_FOLDER=$PID_FOLDER does not exists fallback to /tmp" && PID_FOLDER="/tmp"
-! [[ -x "$LOG_FOLDER" ]] && echoYellow "Warning: LOG_FOLDER=$LOG_FOLDER does not exists fallback to /tmp" && LOG_FOLDER="/tmp"
+! [[ -x "$PID_FOLDER" ]] && echoYellow "PID_FOLDER $PID_FOLDER does not exist. Falling back to /tmp" && PID_FOLDER="/tmp"
+! [[ -x "$LOG_FOLDER" ]] && echoYellow "LOG_FOLDER $LOG_FOLDER does not exist. Falling back to /tmp" && LOG_FOLDER="/tmp"
 
 # Set up defaults
 [[ -z "$MODE" ]] && MODE="{{mode:auto}}" # modes are "auto", "service" or "run"

spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/test/java/org/springframework/boot/launchscript/SysVinitLaunchScriptIT.java

@@ -171,7 +171,22 @@ public class SysVinitLaunchScriptIT {
 
 	@Test
 	public void basicLaunch() throws Exception {
-		doLaunch("basic-launch.sh");
+		String output = doTest("basic-launch.sh");
+		assertThat(output).doesNotContain("PID_FOLDER");
+	}
+
+	@Test
+	public void launchWithMissingLogFolderGeneratesAWarning() throws Exception {
+		String output = doTest("launch-with-missing-log-folder.sh");
+		assertThat(output).has(coloredString(AnsiColor.YELLOW,
+				"LOG_FOLDER /does/not/exist does not exist. Falling back to /tmp"));
+	}
+
+	@Test
+	public void launchWithMissingPidFolderGeneratesAWarning() throws Exception {
+		String output = doTest("launch-with-missing-pid-folder.sh");
+		assertThat(output).has(coloredString(AnsiColor.YELLOW,
+				"PID_FOLDER /does/not/exist does not exist. Falling back to /tmp"));
 	}
 
 	@Test

spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/test/resources/scripts/launch-with-missing-log-folder.sh

@@ -0,0 +1,6 @@
+source ./test-functions.sh
+install_service
+echo 'LOG_FOLDER=/does/not/exist' > /test-service/spring-boot-app.conf
+start_service
+await_app
+curl -s http://127.0.0.1:8080/

spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/test/resources/scripts/launch-with-missing-pid-folder.sh

@@ -0,0 +1,6 @@
+source ./test-functions.sh
+install_service
+echo 'PID_FOLDER=/does/not/exist' > /test-service/spring-boot-app.conf
+start_service
+await_app
+curl -s http://127.0.0.1:8080/