Add failure analyzer for Flyway's bootstrap failure

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/diagnostics/analyzer/FlywayMigrationScriptMissingFailureAnalyzer.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.diagnostics.analyzer;
+
+import org.apache.commons.lang3.StringUtils;
+
+import org.springframework.boot.diagnostics.AbstractFailureAnalyzer;
+import org.springframework.boot.diagnostics.FailureAnalysis;
+
+/**
+ * A {@code FailureAnalyzer} that performs analysis of failures caused by a
+ * {@code IllegalStateException}.
+ *
+ * @author Anand Shastri
+ */
+public class FlywayMigrationScriptMissingFailureAnalyzer
+		extends AbstractFailureAnalyzer<IllegalStateException> {
+
+	private static final String MISSING_SCRIPT_MESSAGE = "Cannot find migrations location in";
+
+	@Override
+	protected FailureAnalysis analyze(Throwable rootFailure, IllegalStateException cause) {
+		if (cause.getMessage().startsWith(MISSING_SCRIPT_MESSAGE)) {
+			String location = StringUtils.substringBetween(cause.getMessage(), "[", "]");
+			return new FailureAnalysis("Cannot find migrations location in " + location,
+					" please add migrations or check your Flyway configuration", cause);
+		}
+		return null;
+	}
+
+}

spring-boot-project/spring-boot/src/main/resources/META-INF/spring.factories

@@ -50,7 +50,8 @@ org.springframework.boot.diagnostics.analyzer.NoUniqueBeanDefinitionFailureAnaly
 org.springframework.boot.diagnostics.analyzer.PortInUseFailureAnalyzer,\
 org.springframework.boot.diagnostics.analyzer.ValidationExceptionFailureAnalyzer,\
 org.springframework.boot.diagnostics.analyzer.InvalidConfigurationPropertyNameFailureAnalyzer,\
-org.springframework.boot.diagnostics.analyzer.InvalidConfigurationPropertyValueFailureAnalyzer
+org.springframework.boot.diagnostics.analyzer.InvalidConfigurationPropertyValueFailureAnalyzer,\
+org.springframework.boot.diagnostics.analyzer.FlywayMigrationScriptMissingFailureAnalyzer
 
 # FailureAnalysisReporters
 org.springframework.boot.diagnostics.FailureAnalysisReporter=\

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/FlywayMigrationScriptMissingFailureAnalyzerTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.diagnostics.analyzer;
+
+import org.junit.Test;
+
+import org.springframework.boot.diagnostics.FailureAnalysis;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link FlywayMigrationScriptMissingFailureAnalyzer}
+ *
+ * @author Anand Shastri
+ */
+public class FlywayMigrationScriptMissingFailureAnalyzerTests {
+
+	private final FlywayMigrationScriptMissingFailureAnalyzer analyzer = new FlywayMigrationScriptMissingFailureAnalyzer();
+
+	@Test
+	public void analysisForFlywayScriptMissingFailureWhenIllegalStateExceptionIsForFlyway() {
+		FailureAnalysis failureAnalysis = this.analyzer.analyze(new IllegalStateException(
+				"Cannot find " + "migrations location in: [classpath:db/migration] "
+						+ "(please add migrations or check your Flyway configuration)"));
+
+		assertThat(failureAnalysis.getDescription())
+				.endsWith("Cannot find migrations location in classpath:db/migration");
+		assertThat(failureAnalysis.getAction())
+				.endsWith(" please add migrations or check your Flyway configuration");
+	}
+
+	@Test
+	public void analysisForFlywayScriptMissingFailureWhenIllegalStateExceptionIsNotForFlyway() {
+		FailureAnalysis failureAnalysis = this.analyzer
+				.analyze(new IllegalStateException("Some other exception"));
+
+		assertThat(failureAnalysis).isNull();
+	}
+
+}