fern-api
diff --git a/‎dist/index.js
+4-1 b/‎dist/index.js
+4-1
diff --git a/‎dist/index.js.map
+1-1 b/‎dist/index.js.map
+1-1
diff --git a/‎src/main.ts
+5-1 b/‎src/main.ts
+5-1
@@ -141,11 +141,15 @@ async function run(): Promise<void> {
 
 function getStringInputOrThrow(key: string): string {
     const input: unknown = core.getInput(key);
-    if (input == null) {
+    if (input == null || isEmptyString(input)) {
         throw new Error(`${key} is not defined.`);
     }
     if (typeof input !== "string") {
         throw new Error(`${key} is not a string.`);
     }
     return input;
 }
+
+function isEmptyString(value: unknown): boolean {
+    return typeof value === "string" && value.length === 0;
+}
Original file line number	Diff line number	Diff line change
`@@ -141,11 +141,15 @@ async function run(): Promise<void> {`
`141`	`141`
`142`	`142`	`function getStringInputOrThrow(key: string): string {`
`143`	`143`	`const input: unknown = core.getInput(key);`
`144`		`- if (input == null) {`
	`144`	`+ if (input == null \|\| isEmptyString(input)) {`
`145`	`145`	throw new Error(`${key} is not defined.`);
`146`	`146`	`}`
`147`	`147`	`if (typeof input !== "string") {`
`148`	`148`	throw new Error(`${key} is not a string.`);
`149`	`149`	`}`
`150`	`150`	`return input;`
`151`	`151`	`}`
	`152`	`+`
	`153`	`+function isEmptyString(value: unknown): boolean {`
	`154`	`+ return typeof value === "string" && value.length === 0;`
	`155`	`+}`