fetch .git/ directory from GitHub since Jenkins doesn't stash it

deploy.sh

@@ -2,6 +2,27 @@
 set -o errexit
 IFS=$'\n\t'
 
+# the .git folder and .gitignore file are not stashed by Jenkins, so we need to fetch them
+git init
+git remote add origin "$GIT_URL"
+git fetch origin
+
+set +o nounset
+if [ -z ${TAG_NAME+x} ]; then
+  TARGET_COMMIT="${GIT_COMMIT}"
+else
+  TARGET_COMMIT="${TAG_NAME}"
+fi
+set -o nounset
+readonly TARGET_COMMIT
+
+# use `git checkout --force` here because we expect the working directory not to be
+# empty at this point. Jenkins unstashed everything from the previous stage into the
+# working directory; we want to keep the build artifacts (i.e. everything in the
+# various target/ directories) but update the files committed to git to the version
+# currently being built.
+git checkout --force "${TARGET_COMMIT}"
+
 # nvm is a bash function, so fake command echoing for nvm commands to reduce noise
 echo "+ . ${NVM_DIR}/nvm.sh --no-use"
 . "${NVM_DIR}/nvm.sh" --no-use

project/ServerlessDeployPlugin.scala

@@ -36,7 +36,7 @@ object ServerlessDeployPlugin extends AutoPlugin {
       if (taggedVersion.value.exists(_.toString == version.value)) {
         if (deployProcess.! == 0) Success
         else throw new IllegalStateException("Serverless returned a non-zero exit code. Please check the logs for more information.")
-      } else SkippedBecauseVersionIsNotLatestTag
+      } else SkippedBecauseVersionIsNotLatestTag(version.value, taggedVersion.value)
     }.evaluated
   )
 
@@ -59,5 +59,5 @@ object ServerlessDeployPlugin extends AutoPlugin {
 
   sealed trait DeployOutcome // no failed outcome because we just throw an exception in that case
   case object Success extends DeployOutcome
-  case object SkippedBecauseVersionIsNotLatestTag extends DeployOutcome
+  case class SkippedBecauseVersionIsNotLatestTag(version: String, taggedVersion: Option[Version]) extends DeployOutcome
 }