feat: provide timestamp properties

Author: qoomon

README.md

@@ -205,9 +205,10 @@ gitVersioning {
 
 - `git.commit` e.g. '0fc20459a8eceb2c4abb9bf0af45a6e8af17b94b'
 - `git.ref` value of branch of tag name, always set
-- `git.branch` e.g. 'feature/next-big-thing', only set for branch versioning
-- `git.tag` e.g. 'v1.2.3', only set for tag versioning
-
+  - `git.branch` e.g. 'feature/next-big-thing', only set for branch versioning
+  - `git.tag` e.g. 'v1.2.3', only set for tag versioning
+- `git.commit.timestamp` e.g. '1560694278'
+- `git.commit.timestamp.datetime` e.g. '2019-11-16T14:37:10Z'
 
 ## Miscellaneous Hints
 

build.gradle

@@ -12,7 +12,7 @@ plugins {
 }
 
 group 'me.qoomon'
-version '1.3.2'
+version '1.4.0'
 
 sourceCompatibility = JavaVersion.VERSION_1_8
 targetCompatibility = JavaVersion.VERSION_1_8

src/main/java/me/qoomon/gradle/gitversioning/GitVersioningPlugin.java

@@ -7,6 +7,9 @@
 
 import javax.annotation.Nonnull;
 
+import java.time.Instant;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeFormatter;
 import java.util.*;
 import java.util.Map.Entry;
 import java.util.stream.Collectors;
@@ -87,6 +90,9 @@ public void apply(@Nonnull Project rootProject) {
 
                 ExtraPropertiesExtension extraProperties = project.getExtensions().getExtraProperties();
                 extraProperties.set("git.commit", gitVersionDetails.getCommit());
+                extraProperties.set("git.commit.timestamp", Long.toString(gitVersionDetails.getCommitTimestamp()));
+                extraProperties.set("git.commit.timestamp.datetime", toTimestampDateTime(gitVersionDetails.getCommitTimestamp()));
+
                 extraProperties.set("git.ref", gitVersionDetails.getCommitRefName());
                 extraProperties.set("git." + gitVersionDetails.getCommitRefType(), gitVersionDetails.getCommitRefName());
             });
@@ -139,6 +145,9 @@ private String getCommandOption(final Project project, final String name) {
                     .toUpperCase();
             value = System.getenv(environmentVariableName);
         }
+        if(value == null) {
+            value = System.getProperty(name);
+        }
         return value;
     }
 
@@ -152,5 +161,15 @@ private boolean getPreferTagsOption(final Project rootProject, final GitVersioni
         }
         return preferTagsOption;
     }
+
+    private static String toTimestampDateTime(long timestamp) {
+        if (timestamp == 0) {
+            return "0000-00-00T00:00:00Z";
+        }
+
+        return DateTimeFormatter.ISO_DATE_TIME
+                .withZone(ZoneOffset.UTC)
+                .format(Instant.ofEpochSecond(timestamp));
+    }
 }