Allow loading classpath resources for sqlFile changesets

grails-database-migration/src/main/groovy/org/grails/plugins/databasemigration/DatabaseMigrationGrailsPlugin.groovy

@@ -19,6 +19,7 @@ import grails.plugins.Plugin
 import liquibase.parser.ChangeLogParser
 import liquibase.parser.ChangeLogParserFactory
 import org.grails.plugins.databasemigration.liquibase.GrailsLiquibase
+import org.grails.plugins.databasemigration.liquibase.GrailsLiquibaseFactory
 import org.grails.plugins.databasemigration.liquibase.GroovyChangeLogParser
 import org.springframework.context.ApplicationContext
 
@@ -45,7 +46,9 @@ class DatabaseMigrationGrailsPlugin extends Plugin {
     @Override
     Closure doWithSpring() {
         configureLiquibase()
-        return { -> }
+        return { ->
+            grailsLiquibaseFactory(GrailsLiquibaseFactory, applicationContext)
+        }
     }
 
     @Override
@@ -71,7 +74,7 @@ class DatabaseMigrationGrailsPlugin extends Plugin {
             }
 
             new DatabaseMigrationTransactionManager(applicationContext, dataSourceName).withTransaction {
-                GrailsLiquibase gl = new GrailsLiquibase(applicationContext)
+                GrailsLiquibase gl = applicationContext.getBean('grailsLiquibaseFactory', GrailsLiquibase)
                 gl.dataSource = getDataSourceBean(applicationContext, dataSourceName)
                 gl.dropFirst = config.getProperty("${configPrefix}.dropOnStart", Boolean, false)
                 gl.changeLog = config.getProperty("${configPrefix}.updateOnStartFileName", String, isDefaultDataSource(dataSourceName) ? 'changelog.groovy' : "changelog-${dataSourceName}.groovy")

grails-database-migration/src/main/groovy/org/grails/plugins/databasemigration/liquibase/GrailsLiquibase.groovy

@@ -21,9 +21,9 @@ import liquibase.database.Database
 import liquibase.exception.DatabaseException
 import liquibase.exception.LiquibaseException
 import liquibase.integration.spring.SpringLiquibase
-import liquibase.resource.ClassLoaderResourceAccessor
 import liquibase.resource.ResourceAccessor
 import org.springframework.context.ApplicationContext
+import org.springframework.core.io.DefaultResourceLoader
 
 import java.sql.Connection
 
@@ -42,11 +42,12 @@ class GrailsLiquibase extends SpringLiquibase {
 
     GrailsLiquibase(ApplicationContext applicationContext) {
         this.applicationContext = applicationContext
+        this.resourceLoader = new DefaultResourceLoader()
     }
 
     @Override
     protected Liquibase createLiquibase(Connection connection) throws LiquibaseException {
-        Liquibase liquibase = new Liquibase(getChangeLog(), new ClassLoaderResourceAccessor(), createDatabase (connection, null))
+        Liquibase liquibase = new Liquibase(getChangeLog(), createResourceOpener(), createDatabase (connection, null))
         if (parameters != null) {
             for (Map.Entry<String, String> entry : parameters.entrySet()) {
                 liquibase.setChangeLogParameter(entry.getKey(), entry.getValue())

grails-database-migration/src/main/groovy/org/grails/plugins/databasemigration/liquibase/GrailsLiquibaseFactory.groovy

@@ -0,0 +1,24 @@
+package org.grails.plugins.databasemigration.liquibase
+
+import org.springframework.beans.factory.config.AbstractFactoryBean
+import org.springframework.context.ApplicationContext
+
+class GrailsLiquibaseFactory extends AbstractFactoryBean<GrailsLiquibase> {
+
+    private final ApplicationContext applicationContext
+
+    GrailsLiquibaseFactory(ApplicationContext applicationContext) {
+        setSingleton(false)
+        this.applicationContext = applicationContext
+    }
+
+    @Override
+    Class<?> getObjectType() {
+        return GrailsLiquibase
+    }
+
+    @Override
+    protected GrailsLiquibase createInstance() throws Exception {
+        return new GrailsLiquibase(applicationContext)
+    }
+}