From 7c0f6f610947b22e902d348ffc7a06ccadb67cb7 Mon Sep 17 00:00:00 2001
From: Robinson <robinson@dorkbox.com>
Date: Tue, 31 May 2022 00:14:29 +0200
Subject: [PATCH] Added support for getting the most recent git commit hash

---
 build.gradle.kts                     |  2 +-
 src/dorkbox/version/VersionPlugin.kt | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/build.gradle.kts b/build.gradle.kts
index 7b89a37..2582eda 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -32,7 +32,7 @@ object Extras {
     // set for the project
     const val description = "Gradle Plugin to update version information and git tags within the Gradle project and java/kotlin files"
     const val group = "com.dorkbox"
-    const val version = "2.4.1"
+    const val version = "2.5"
 
     // set as project.ext
     const val name = "Version Update"
diff --git a/src/dorkbox/version/VersionPlugin.kt b/src/dorkbox/version/VersionPlugin.kt
index ad1ee9c..d8e2aa7 100644
--- a/src/dorkbox/version/VersionPlugin.kt
+++ b/src/dorkbox/version/VersionPlugin.kt
@@ -262,6 +262,21 @@ class VersionPlugin : Plugin<Project> {
             }
         }
 
+        /**
+         * Gets the most recent commit hash in the specified repository.
+         */
+        fun gitCommitHash(directory: File, length: Int = 7) : String {
+            val latestCommit = getGit(directory).log().setMaxCount(1).call().iterator().next()
+            val latestCommitHash = latestCommit.name
+
+            return if (latestCommitHash?.isNotEmpty() == true) {
+                val maxLength = length.coerceAtMost(latestCommitHash.length)
+                latestCommitHash.substring(0, maxLength)
+            } else {
+                "NO_HASH"
+            }
+        }
+
         fun createTag(project: Project, newVersion: Version) {
             // make sure all code is committed (no un-committed files and no staged files). Throw error and exit if there is
             val git = getGit(project)
@@ -634,6 +649,15 @@ class VersionPlugin : Plugin<Project> {
             return alreadyParsedFiles
         }
 
+        private fun getGit(directory: File): Git {
+            try {
+                val gitDir = getRootGitDir(directory)
+                return Git.wrap(FileRepository(gitDir))
+            } catch (e: IOException) {
+                throw RuntimeException(e)
+            }
+        }
+
         private fun getGit(project: Project): Git {
             try {
                 val gitDir = getRootGitDir(project.projectDir)