Try to fix build

Author: daneden

.github/workflows/build.yml

@@ -42,4 +42,5 @@ jobs:
         run: |
           cd Demo\ App
           cp .env.example .env
+          ./Scripts/prebuild.sh
           xcodebuild -scheme Twift_SwiftUI -allowProvisioningUpdates

Demo App/Scripts/prebuild.sh

@@ -0,0 +1,20 @@
+if [ ! -f ".env" ];
+then
+  echo "error: No .env file was found for environment variables. Check the README for setup instructions for this demo app.";
+  exit 1;
+fi
+
+set -o allexport; source .env; set +o allexport;
+
+content="import Foundation
+/// This file is automatically populated by a pre-action build script in the Twift_SwiftUI scheme
+/// **Do not** check in the \`.env\` file or this generated \`Secrets.swift\` file to version control.
+
+let TWITTER_API_KEY=\"$TWITTER_API_KEY\"
+let TWITTER_API_SECRET=\"$TWITTER_API_SECRET\"
+let TWITTER_CALLBACK_URL=\"$TWITTER_CALLBACK_URL\"
+let CLIENT_ID=\"$CLIENT_ID\"
+";
+
+echo "$content" > Twift_SwiftUI/Secrets.swift;
+exit 0;

Demo App/Twift_SwiftUI.xcodeproj/xcshareddata/xcschemes/Twift_SwiftUI.xcscheme

@@ -5,6 +5,15 @@
    <BuildAction
       parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
+      <PreActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "Run Script"
+               scriptText = "cd $SRCROOT;&#10;&#10;./Scripts/prebuild.sh&#10;">
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"