print build version before build, pull build version from the last tag in git

Author: barnhill

build.gradle.kts

@@ -1,3 +1,5 @@
+import org.gradle.internal.extensions.core.extra
+
 buildscript {
     repositories {
         google()
@@ -18,4 +20,20 @@ tasks {
         gradleVersion = libs.versions.gradle.get()
         distributionType = Wrapper.DistributionType.BIN
     }
+}
+
+rootProject.extra.set("gitVersionName", fetchGitVersionName())
+rootProject.extra.set("gitVersionCode", fetchGitVersionCode())
+
+fun fetchGitVersionCode(): String = "git rev-list HEAD --count".execute()
+
+fun fetchGitVersionName(): String = "git describe HEAD".execute()
+
+fun String.execute(): String {
+    val process = ProcessBuilder(*split(" ").toTypedArray())
+        .redirectOutput(ProcessBuilder.Redirect.PIPE)
+        .redirectError(ProcessBuilder.Redirect.PIPE)
+        .start()
+    process.waitFor()
+    return process.inputStream.bufferedReader().readText().trim()
 }

pdfviewer/build.gradle.kts

@@ -7,9 +7,9 @@ plugins {
     id("kotlin-parcelize")
 }
 
-version = project.properties["VERSION_NAME"].toString()
+val gitVersionName: String by rootProject.extra
+version = gitVersionName
 group = project.properties["GROUP"].toString()
-
 android {
     namespace = "com.pnuema.android.pdfviewer"
     base.archivesName.set("compose-pdf-viewer")
@@ -24,13 +24,17 @@ android {
     buildTypes {
         release {
             isMinifyEnabled = false
+            isShrinkResources = false
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            enableUnitTestCoverage = false
         }
         debug {
             isMinifyEnabled = false
+            isShrinkResources = false
+            enableUnitTestCoverage = true
         }
     }
     compileOptions {
@@ -59,6 +63,12 @@ dependencies {
     debugImplementation(libs.androidx.compose.ui.tooling)
 }
 
+tasks.register("version") {
+    doFirst {
+        println("Version Name: $gitVersionName")
+    }
+}
+
 val dokkaOutputDir = layout.buildDirectory.dir("dokka")
 tasks {
     val sourcesJar by registering(Jar::class, fun Jar.() {
@@ -99,4 +109,8 @@ tasks {
     build {
         dependsOn(dokkaGenerate)
     }
+
+    preBuild {
+        dependsOn("version")
+    }
 }