Don't crash the build if git is not available

build.gradle

@@ -21,13 +21,18 @@ allprojects {
     apply plugin: "maven-publish"
 
     archivesBaseName = rootProject.archives_base_name
-    def vers = 'git describe --always --tags --first-parent --dirty'.execute().text.trim()
+    def vers = ""
+    try {
+        vers = 'git describe --always --tags --first-parent --dirty'.execute().text.trim()
+    } catch (Exception e) {
+        println "Version detection failed: " + e
+    }
     if (!vers.startsWith("v")) {
-        println "git doesn't appear to be installed!"
         println "using version number: " + rootProject.mod_version
         version = rootProject.mod_version
     } else {
         version = vers.substring(1)
+        println "Detected version " + version
     }
     group = rootProject.maven_group