Improved the PR check script (LukeSmithxyz#426)

* Improved the PR check script

* Added check to make sure that only lowercase alpha characters and
hyphens are in the tag list

* Brought back the set -eu

.github/workflows/scripts/check-files.sh

@@ -36,13 +36,17 @@ check_recipe_name() {
 }
 
 check_recipe_content() {
-	awk '
+	errMsgs="$(awk '
 		BEGIN {
-			HAS_TITLE       = 0;
-			HAS_TAGS        = 0;
-			NUM_TAGS        = 0;
-			HAS_INGREDIENTS = 0;
-			HAS_DIRECTIONS  = 0;
+			HAS_TITLE                   = 0;
+			HAS_TAGS                    = 0;
+			HAS_INVALID_TAGS            = 0;
+			NUM_TAGS                    = 0;
+			HAS_INGREDIENTS             = 0;
+			HAS_DIRECTIONS              = 0;
+			HAS_CONSECUTIVE_EMPTY_LINES = 0;
+
+			CONSECUTIVE_EMPTY_LINES = 0;
 		}
 
 		# First line should be the title
@@ -51,78 +55,99 @@ check_recipe_content() {
 			next;
 		}
 
-		/^## Ingredients/ {
+		$0 == "## Ingredients" {
 			HAS_INGREDIENTS = 1;
-			next;
 		}
 
-		/^## Directions/ {
+		$0 == "## Directions" {
 			HAS_DIRECTIONS = 1;
-			next;
+		}
+
+		$0 == "" {
+			CONSECUTIVE_EMPTY_LINES++
+			if (CONSECUTIVE_EMPTY_LINES >= 2) {
+				HAS_CONSECUTIVE_EMPTY_LINES = 1;
+			}
+		}
+
+		$0 != "" {
+			CONSECUTIVE_EMPTY_LINES = 0;
 		}
 
 		END {
 			# Last line should be the tags list
 			if ($1 == ";tags:") {
 				HAS_TAGS = 1;
 				NUM_TAGS = NF - 1;
-			}
 
-			FAIL = 0;
+				# Loop through all the tags
+				for (i = 2; i <= NF; i++) {
+					# Make sure that each tag only contains lowercase letters and hyphens
+					if ($i !~ "^[a-z-]+$") {
+						HAS_INVALID_TAGS = 1;
+						break;
+					}
+				}
+			}
 
 			if (!HAS_TITLE) {
 				print "Recipe does not have a properly formatted title on the first line."
-				FAIL = 1;
 			}
 
 			if (!HAS_TAGS) {
 				print "Recipe does not have a properly formatted tags on the last line."
-				FAIL = 1;
-			} else if (NUM_TAGS < 2) {
-				print "Recipe only has " NUM_TAGS " tags. Add some more."
-				FAIL = 1;
-			} else if (NUM_TAGS > 5) {
-				print "Recipe has " NUM_TAGS " tags which is too many. Remove some tags."
-				FAIL = 1;
+			} else {
+				if (HAS_INVALID_TAGS) {
+					print "Recipe has invalid tags. Tags must be separated by spaces and contain only lowercase letters or hyphens (-)";
+				}
+
+				if (NUM_TAGS < 2) {
+					print "Recipe only has " NUM_TAGS " tags. Add some more."
+				} else if (NUM_TAGS > 5) {
+					print "Recipe has " NUM_TAGS " tags which is too many. Remove some tags."
+				}
 			}
 
 			if (!HAS_INGREDIENTS) {
 				print "Recipe does not have an ingredients list."
-				FAIL = 1;
 			}
 
 			if (!HAS_DIRECTIONS) {
 				print "Recipe does not have a directions section."
-				FAIL = 1;
 			}
 
-			if (FAIL) {
-				exit 1;
+			if (HAS_CONSECUTIVE_EMPTY_LINES) {
+				print "Recipe has at least 2 consecutive empty lines.";
 			}
 		}
-	' "$1"
+	' "$1")"
 
-	if [ $? -ne 0 ]; then
+	if [ -n "$errMsgs" ]; then
+		echo "$errMsgs"
 		FAIL=1
 	fi
 }
 
-git diff --name-only "$(git merge-base origin/master HEAD)" | while IFS= read -r file; do
+while IFS= read -r file; do
+	echo "Checking '$file'"
 	case "$file" in
+		# Ignore these files
+		index.md) ;;
+		.github/*.md) ;;
+
 		*.webp)
-			echo "Checking size of $file"
 			check_size "$file"
 			check_webp_name "$file"
 			;;
-		.github/*.md)
-			# Ignore markdown files in .github
-			continue;
-			;;
 		*.md)
 			check_recipe_name "$file"
 			check_recipe_content "$file"
 			;;
-    esac
-done
+	esac
+	# Separate each file for easier reading.
+	echo ""
+done <<EOF
+$(git diff --name-only "$(git merge-base origin/master HEAD)")
+EOF
 
 exit $FAIL