ci: add formatting workflow

Author: xTrayambak

.github/workflows/formatting.yml

@@ -30,4 +30,4 @@ jobs:
           nph --version
 
       - name: Format the code
-        run: nph src/
+        run: ${{ github.workspace }}/scripts/format-code.sh

scripts/format-code.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+pwd
+ls
+
+exit_val="0"
+
+# Format the source code.
+nph src || exit_val="$?"
+
+if [[ "${exit_val}" -ne "0" ]]
+  echo "format-code: nph exited with non-zero exit code $exit_val"
+  echo "format-code: this workflow has failed."
+  exit 1
+else
+  echo "format-code: nph exited with exit-code zero."
+  echo "format-code: this workflow has succeeded."
+  exit 0
+fi