expose jgitver-maven-plugin version

fixes #76

pom.xml

@@ -174,6 +174,12 @@
     </dependencies>
 
     <build>
+        <resources>
+            <resource>
+                <directory>src/main/resources-filtered</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
         <plugins>
             <plugin>
                 <groupId>org.codehaus.plexus</groupId>

src/main/java/fr/brouillard/oss/jgitver/JGitverExtension.java

@@ -128,6 +128,11 @@ public void afterProjectsRead(MavenSession mavenSession) throws MavenExecutionEx
                     }
 
                     sessionHolder.session().ifPresent(jgitverSession -> {
+                        logger.info(String.format(
+                                "jgitver-maven-plugin [%s] (sha1: %s)",
+                                JGitverProperties.getVersion(),
+                                JGitverProperties.getSHA1())
+                        );
                         logger.info("jgitver-maven-plugin is about to change project(s) version(s)");
 
                         jgitverSession.getProjects().forEach(

src/main/java/fr/brouillard/oss/jgitver/JGitverProperties.java

@@ -0,0 +1,44 @@
+// @formatter:off
+/**
+ * Copyright (C) 2016 Matthieu Brouillard [http://oss.brouillard.fr/jgitver-maven-plugin] (matthieu@brouillard.fr)
+ *
+ * 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.
+ */
+// @formatter:on
+package fr.brouillard.oss.jgitver;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+public class JGitverProperties {
+    static Properties p = new Properties();
+    static {
+        try {
+            InputStream is = JGitverProperties.class.getResourceAsStream("/META-INF/project.properties");
+            if (is != null) {
+                p.load(is);
+            }
+        } catch (IOException e) {
+            // ignore
+        }
+    }
+
+    public static String getVersion() {
+        return p.getProperty("version", "Unknown");
+    }
+
+    public static String getSHA1() {
+        return p.getProperty("sha1", "not git sha1");
+    }
+}

src/main/java/fr/brouillard/oss/jgitver/JGitverUtils.java

@@ -147,6 +147,8 @@ public static void fillPropertiesFromMetadatas(Properties properties, GitVersion
         logger.debug(EXTENSION_PREFIX + " calculated version number: " + calculatedVersion);
         properties.put(EXTENSION_PREFIX + ".calculated_version", calculatedVersion);
 
+        properties.put(EXTENSION_PREFIX + ".plugin-version", JGitverProperties.getVersion());
+
         Arrays.asList(Metadatas.values()).stream().forEach(metaData -> {
             Optional<String> metaValue = gitVersionCalculator.meta(metaData);
             String propertyName = EXTENSION_PREFIX + "." + metaData.name().toLowerCase(Locale.ENGLISH);

src/main/resources-filtered/META-INF/project.properties

@@ -0,0 +1,20 @@
+#
+# Copyright (C) 2016 Matthieu Brouillard [http://oss.brouillard.fr/jgitver-maven-plugin] (matthieu@brouillard.fr)
+#
+# 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.
+#
+
+version=${jgitver.calculated_version}
+dirty=${jgitver.dirty}
+sha1=${jgitver.git_sha1_full}
+branch=${jgitver.branch_name}