Added plugin details

src/main/scala/com/twalford/SnykPlugin.scala

@@ -0,0 +1,26 @@
+package com.twalford
+
+import net.virtualvoid.sbt.graph.DependencyGraphPlugin
+import sbt._
+import sbt.Keys._
+import SnykTasks._
+
+object SnykPlugin extends AutoPlugin {
+  self =>
+  override def requires = DependencyGraphPlugin
+  object autoImport {
+    val SnykPlugin: AutoPlugin = self
+    val snykOrganization = SnykTasks.snykOrganization
+  }
+
+  override def globalSettings: Seq[Def.Setting[_]] = Seq(
+    Global / concurrentRestrictions += Tags.exclusive(snykTag),
+    aggregate in snykAuth := false
+  )
+
+  override lazy val projectSettings: Seq[Setting[_]] = Seq(
+    snykTest := snykTestTask.value,
+    snykMonitor := snykMonitorTask.value,
+    snykAuth := snykAuthTask.value
+  )
+}

src/main/scala/com/twalford/SnykTasks.scala

@@ -0,0 +1,56 @@
+package com.twalford
+
+import sbt.ConcurrentRestrictions.Tag
+import sbt.{Def, settingKey, taskKey}
+import sbt.Keys.{name, streams}
+import sbt.internal.util.ManagedLogger
+
+import scala.sys.process.Process
+
+object SnykTasks {
+  private lazy val authEnvVar = "SNYK_TOKEN"
+
+  val snykOrganization = settingKey[String]("The organization snyk should be run for")
+  val snykAuth = taskKey[Unit]("Authorizes a local snyk instance")
+  val snykTest = taskKey[Unit]("Runs snyk test on the local project")
+  val snykMonitor = taskKey[Unit]("Runs snyk monitor on the local project")
+
+  val snykTag = Tag("snyk-exclusive")
+
+
+  lazy val snykTestTask = Def.task {
+    val log = streams.value.log
+    run(s"""snyk test -- "\\"project ${name.value}\\""""", log)
+  }.tag(snykTag)
+
+  lazy val snykMonitorTask = Def.task {
+    val log = streams.value.log
+    val projectName = name.value
+    run(s"""snyk monitor --org=${snykOrganization.value} --project-name=$projectName -- "\\"project $projectName\\""""", log)
+  }.tag(snykTag)
+
+  lazy val snykAuthTask = Def.task {
+    val log = streams.value.log
+    checkForAuth(log)
+  }.tag(snykTag)
+
+  private def checkForAuth(log: ManagedLogger): Unit = {
+    Option(System.getenv(authEnvVar)) match {
+      case None =>
+        log.info("No auth set up, but presumed we're running locally. Requesting auth via `snyk auth`")
+        run("snyk auth", log)
+      case Some(auth) =>
+        log.debug("Snyk using environment variable authorization, continuing")
+        run(s"snyk auth $auth", log)
+    }
+  }
+
+  private def run(cmd: String, log: ManagedLogger): Unit = {
+    val shell = if (sys.props("os.name").contains("Windows")) {
+      List("cmd", "/c")
+    } else {
+      List("bash", "-c")
+    }
+    Process(shell ::: cmd.split(' ').toList) ! log
+  }
+}