Execute test: Replace with actual shell code

.github/workflows/Shellcheck.yml

@@ -35,5 +35,32 @@ jobs:
     - name: Execute test
       env:
         TERM: xterm-256color
-        PATH: "$PATH:${{ github.workspace }}/shellcheck"
-      run: ./test
+
+      run: |
+        
+        declare -a ERRORS
+        declare -a FILES
+
+        for file in "${FILES[@]}"; do
+          if /usr/bin/file "${file}" | /usr/bin/grep --quiet "shell" || \
+              /usr/bin/file "${file}" | /usr/bin/grep --quiet "bash" || \
+              /usr/bin/file "${file}" | /usr/bin/grep --quiet "zsh"; then
+
+              if shellcheck --shell=bash "${shell_file}" ; then
+                echo "[PASS] $(/usr/bin/basename "${shell_file}")"
+              else
+                echo "[FAIL] $(/usr/bin/basename "${shell_file}")"
+                ERRORS+=("${shell_file}")
+              fi
+          fi
+        done
+
+        if [[ ${#ERRORS[@]} -eq 0 ]]; then
+          # If ERRORS empty then 
+          echo "[PASS] No errors, hooray"
+          exit 0
+        else
+          # If ERRORS not empty, print the names of files which failed
+          echo "[FAIL] These files failed linting: ${ERRORS[*]}"
+          exit 1
+        fi