Merge pull request #39 from mzuehlke/update-using-string-replace

Author: eed3si9n

build.sbt

@@ -1,5 +1,14 @@
+import java.util.regex.Pattern
+
 TaskKey[Unit]("updateYml") := {
-  import scala.sys.process.Process
 
-  Process("yq", Seq("e", "-i", s""".inputs.sbt-runner-version.default = "${sbtVersion.value}"""", "action.yml")).!
+  val location = baseDirectory.value / "action.yml"
+  val oldContent = IO.read(location)
+
+  val matcher = Pattern.compile("default: (.+)$", Pattern.MULTILINE).matcher(oldContent)
+  if (matcher.find) {
+    val oldVersion = matcher.group(1)
+    val updatedContent = oldContent.replace(s"default: $oldVersion", s"default: ${sbtVersion.value}")
+    IO.write(location, updatedContent)
+  }
 }