Attempting workaround for weird GPG tty issue

Author: djspiewak

Diff for: .github/workflows/ci.yml

@@ -101,6 +101,9 @@ jobs:
             ~/Library/Caches/Coursier/v1
           key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
 
+      - name: Export GPG_TTY
+        run: echo "GPG_TTY=$(tty)" >> $GITHUB_ENV
+
       - name: Import signing key
         run: echo $PGP_SECRET | base64 -d | gpg --import
 

Diff for: build.sbt

@@ -79,6 +79,9 @@ ThisBuild / spiewakMainBranches := Seq("main")
 ThisBuild / githubWorkflowArtifactUpload := false
 
 // we can remove this once we have a non-password-protected key in the secrets
+ThisBuild / githubWorkflowPublishPreamble :=
+  WorkflowStep.ComputeVar("GPG_TTY", "tty") +: (ThisBuild / githubWorkflowPublishPreamble).value
+
 ThisBuild / githubWorkflowPublishPreamble +=
   WorkflowStep.Run(
     List("echo \"$PGP_PASSPHRASE\" | gpg --batch --yes --passphrase-fd 0 build.sbt &> /dev/null"),