Add before/after-new hooks.

src/main/java/org/apache/ibatis/migration/Environment.java

@@ -1,5 +1,5 @@
 /**
- *    Copyright 2010-2017 the original author or authors.
+ *    Copyright 2010-2018 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.
@@ -52,7 +52,9 @@ private enum SETTING_KEY {
     hook_before_down,
     hook_before_each_down,
     hook_after_each_down,
-    hook_after_down
+    hook_after_down,
+    hook_before_new,
+    hook_after_new
   }
 
   private static final List<String> SETTING_KEYS;
@@ -89,6 +91,9 @@ private enum SETTING_KEY {
   private final String hookAfterEachDown;
   private final String hookAfterDown;
 
+  private final String hookBeforeNew;
+  private final String hookAfterNew;
+
   private final Properties variables = new Properties();
 
   public Environment(File file) {
@@ -122,6 +127,9 @@ public Environment(File file) {
       this.hookAfterEachDown = prop.getProperty(SETTING_KEY.hook_after_each_down.name());
       this.hookAfterDown = prop.getProperty(SETTING_KEY.hook_after_down.name());
 
+      this.hookBeforeNew = prop.getProperty(SETTING_KEY.hook_before_new.name());
+      this.hookAfterNew = prop.getProperty(SETTING_KEY.hook_after_new.name());
+
       // User defined variables.
       Set<Entry<Object, Object>> entries = prop.entrySet();
       for (Entry<Object, Object> entry : entries) {
@@ -229,6 +237,14 @@ public String getHookAfterDown() {
     return hookAfterDown;
   }
 
+  public String getHookBeforeNew() {
+    return hookBeforeNew;
+  }
+
+  public String getHookAfterNew() {
+    return hookAfterNew;
+  }
+
   public Properties getVariables() {
     return variables;
   }

src/main/java/org/apache/ibatis/migration/commands/NewCommand.java

@@ -16,9 +16,13 @@
 package org.apache.ibatis.migration.commands;
 
 import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Properties;
 
 import org.apache.ibatis.migration.MigrationException;
+import org.apache.ibatis.migration.hook.MigrationHook;
+import org.apache.ibatis.migration.hook.NewHookContext;
 import org.apache.ibatis.migration.options.SelectedOptions;
 import org.apache.ibatis.migration.utils.Util;
 
@@ -41,6 +45,13 @@ public void execute(String... params) {
     existingEnvironmentFile();
     String filename = getNextIDAsString() + "_" + description.replace(' ', '_') + ".sql";
 
+    Map<String, Object> hookBindings = new HashMap<String, Object>();
+    MigrationHook hook = createNewHook();
+    if (hook != null) {
+      hookBindings.put(MigrationHook.HOOK_CONTEXT, new NewHookContext(description, filename));
+      hook.before(hookBindings);
+    }
+
     if (options.getTemplate() != null) {
       copyExternalResourceTo(options.getTemplate(), Util.file(paths.getScriptPath(), filename), variables);
     } else {
@@ -53,6 +64,10 @@ public void execute(String... params) {
             .append("Your migrations configuration did not find your custom template.  Using the default template.");
         copyDefaultTemplate(variables, filename);
       }
+      if (hook != null) {
+        hookBindings.put(MigrationHook.HOOK_CONTEXT, new NewHookContext(description, filename));
+        hook.after(hookBindings);
+      }
     }
     printStream.println("Done!");
     printStream.println();
@@ -62,4 +77,13 @@ private void copyDefaultTemplate(Properties variables, String filename) {
     copyResourceTo("org/apache/ibatis/migration/template_migration.sql", Util.file(paths.getScriptPath(), filename),
         variables);
   }
+
+  private MigrationHook createNewHook() {
+    String before = environment().getHookBeforeNew();
+    String after = environment().getHookAfterNew();
+    if (before == null && after == null) {
+      return null;
+    }
+    return createFileMigrationHook(before, null, null, after);
+  }
 }

src/main/java/org/apache/ibatis/migration/hook/NewHookContext.java

@@ -0,0 +1,45 @@
+/**
+ *    Copyright 2010-2018 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.apache.ibatis.migration.hook;
+
+/**
+ * Hook context object that is available to <code>before_new</code> and <code>after_new</code> hooks.
+ */
+public class NewHookContext {
+  private String description;
+  private String filename;
+
+  public NewHookContext(String description, String filename) {
+    super();
+    this.description = description;
+    this.filename = filename;
+  }
+
+  /**
+   * @return The specified description.
+   */
+  public String getDescription() {
+    return description;
+  }
+
+  /**
+   * @return The name of the file that is created by new command.<br>
+   *         In <code>before_new</code> hook, the file is not created yet.
+   */
+  public String getFilename() {
+    return filename;
+  }
+}

src/site/xdoc/hooks.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-       Copyright 2010-2016 the original author or authors.
+       Copyright 2010-2018 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.
@@ -127,6 +127,8 @@ Hello, World!]]></source>
           <li>hook_before_each_down</li>
           <li>hook_after_each_down</li>
           <li>hook_after_down</li>
+          <li>hook_before_new (since 3.3.5)</li>
+          <li>hook_after_new (since 3.3.5)</li>
         </ul>
 
         <h4>Minimum setting : language and file name</h4>
@@ -200,6 +202,17 @@ print(migrationPaths.getScriptPath());
 print(migrationPaths.getDriverPath());
 print(migrationPaths.getHookPath());]]></source>
 
+        <h4>About <i>hookContext</i></h4>
+
+        <p>
+          A global variable <code>hookContext</code> is passed to each hook script, but the object bound to this variable depends on the hook.
+        </p>
+
+        <ul>
+          <li>For hooks except before_new and after_new, it is an instance of <a href="/migrations/apidocs/org/apache/ibatis/migration/hook/HookContext.html" target="_blank">HookContext</a>.</li>
+          <li>For before_new and after_new hooks, it will be <a href="/migrations/apidocs/org/apache/ibatis/migration/hook/NewHookContext.html" target="_blank">NewHookContext</a>.</li>
+        </ul>
+
         <h4>Accessing <i>Change</i> object (in each hook only)</h4>
 
         <p>
@@ -214,6 +227,11 @@ print(hookContext.getChange().getFilename());]]></source>
           The Change instance is a clone and will be discarded after each exection, so modifying it would be meaningless.
         </p>
 
+        <p>
+          <span class="label important">NOTE</span>
+          Change is not available to before_new and after_new hooks.
+        </p>
+
         <h4>Execute SQL statement</h4>
 
         <p>
@@ -240,6 +258,10 @@ try {
   stmt = null;
 }]]></source>
 
+        <p>
+          <span class="label important">NOTE</span>
+          These methods are not available to before_new and after_new hooks.
+        </p>
 
         <h4>Invoking function</h4>
 

src/test/java/org/apache/ibatis/migration/MigratorTest.java

@@ -297,7 +297,7 @@ public void checkAssertion() {
 
   @Test
   public void shouldInitTempDirectory() throws Exception {
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "init"));
     assertNotNull(basePath.list());
     assertEquals(4, basePath.list().length);
@@ -310,7 +310,7 @@ public void shouldInitTempDirectory() throws Exception {
   @Test
   public void shouldRespectIdPattern() throws Exception {
     String idPattern = "000";
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "--idpattern=" + idPattern, "init"));
     File changelog = new File(
         basePath.getCanonicalPath() + File.separator + "scripts" + File.separator + "001_create_changelog.sql");
@@ -325,7 +325,7 @@ public void shouldRespectIdPattern() throws Exception {
   @Test
   public void useCustomTemplate() throws Exception {
     String desc = "test new migration";
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "init"));
     assertNotNull(basePath.list());
     assertEquals(4, basePath.list().length);
@@ -351,7 +351,7 @@ public void useCustomTemplate() throws Exception {
 
   @Test
   public void useCustomTemplateWithNoValue() throws Exception {
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "init"));
     assertNotNull(basePath.list());
     assertEquals(4, basePath.list().length);
@@ -368,7 +368,7 @@ public void useCustomTemplateWithNoValue() throws Exception {
   @Test
   public void useCustomTemplateWithBadPath() throws Exception {
     System.setProperty("migrationsHome", "/tmp");
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "init"));
     assertNotNull(basePath.list());
     assertEquals(4, basePath.list().length);
@@ -386,7 +386,7 @@ public void useCustomTemplateWithBadPath() throws Exception {
   @Test
   public void shouldSuppressOutputIfQuietOptionEnabled() throws Throwable {
     System.setProperty("migrationsHome", "/tmp");
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     out.clearLog();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "--quiet", "init"));
     String output = out.getLog();
@@ -397,7 +397,7 @@ public void shouldSuppressOutputIfQuietOptionEnabled() throws Throwable {
   @Test
   public void shouldColorizeSuccessOutputIfColorOptionEnabled() throws Throwable {
     System.setProperty("migrationsHome", "/tmp");
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     out.clearLog();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "--color", "init"));
     String output = out.getLog();
@@ -415,18 +415,8 @@ public void checkAssertion() {
       }
     });
     System.setProperty("migrationsHome", "/tmp");
-    File basePath = getTempDir();
+    File basePath = TestUtil.getTempDir();
     out.clearLog();
     Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "--color", "new"));
   }
-
-  private File getTempDir() throws IOException {
-    File f = File.createTempFile("migration", "test");
-    assertTrue(f.delete());
-    assertTrue(f.mkdir());
-    assertTrue(f.exists());
-    assertTrue(f.isDirectory());
-    f.deleteOnExit();
-    return f;
-  }
 }

src/test/java/org/apache/ibatis/migration/hook/NewHookTest.java

@@ -0,0 +1,105 @@
+/**
+ *    Copyright 2010-2018 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.apache.ibatis.migration.hook;
+
+import static org.junit.Assert.*;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.nio.channels.FileChannel;
+
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.migration.Migrator;
+import org.apache.ibatis.migration.utils.TestUtil;
+import org.apache.ibatis.migration.utils.Util;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.contrib.java.lang.system.Assertion;
+import org.junit.contrib.java.lang.system.ExpectedSystemExit;
+import org.junit.contrib.java.lang.system.SystemOutRule;
+
+public class NewHookTest {
+  @Rule
+  public final ExpectedSystemExit exit = ExpectedSystemExit.none();
+
+  @Rule
+  public final SystemOutRule out = new SystemOutRule().enableLog();
+
+  @Test
+  public void shouldRunNewHooks() throws Throwable {
+    File basePath = initBaseDir();
+    File scriptPath = new File(basePath.getCanonicalPath() + File.separator + "scripts");
+    Migrator
+        .main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "--idpattern=00", "new", "create table1 JIRA-123"));
+    String[] scripts = scriptPath.list();
+    assertEquals(4, scripts.length);
+    String output = out.getLog();
+    assertTrue(output.contains("SUCCESS"));
+    assertTrue(output.contains("Description is valid."));
+    assertTrue(output.contains("Renamed 03_create_table1_JIRA-123.sql to 03_create_table1_JIRA123.sql"));
+    assertTrue(new File(scriptPath, "03_create_table1_JIRA123.sql").exists());
+  }
+
+  @Test
+  public void shouldNotCreateFileWhenBeforeHookThrowsException() throws Throwable {
+    exit.expectSystemExitWithStatus(1);
+    exit.checkAssertionAfterwards(new Assertion() {
+      public void checkAssertion() {
+        String output = out.getLog();
+        assertTrue(output.contains("FAILURE"));
+      }
+    });
+    File basePath = initBaseDir();
+    File scriptPath = new File(basePath.getCanonicalPath() + File.separator + "scripts");
+    Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "new", "create table1"));
+    assertEquals(3, scriptPath.list().length);
+  }
+
+  protected File initBaseDir() throws IOException {
+    File basePath = TestUtil.getTempDir();
+    Migrator.main(TestUtil.args("--path=" + basePath.getAbsolutePath(), "--idpattern=00", "init"));
+    // Copy hook script
+    File hooksDir = new File(basePath, "hooks");
+    hooksDir.mkdir();
+    FileInputStream srcStream = new FileInputStream(
+        Resources.getResourceAsFile("org/apache/ibatis/migration/hook/testdir/hooks/NewHook.js"));
+    FileOutputStream destStream = new FileOutputStream(Util.file(hooksDir, "NewHook.js"));
+    try {
+      FileChannel srcChannel = srcStream.getChannel();
+      FileChannel destChannel = destStream.getChannel();
+      srcChannel.transferTo(0, srcChannel.size(), destChannel);
+    } finally {
+      srcStream.close();
+      destStream.close();
+    }
+    // Add hook settings
+    File envFile = new File(basePath.getCanonicalPath() + File.separator + "environments", "development.properties");
+    PrintWriter writer = new PrintWriter(
+        new BufferedWriter(new OutputStreamWriter(new FileOutputStream(envFile, true), "utf-8")));
+    try {
+      writer.println("hook_before_new=js:NewHook.js:_function=validateDesc");
+      writer.println("hook_after_new=js:NewHook.js:_function=renameFile");
+    } finally {
+      writer.close();
+    }
+    return basePath;
+  }
+}