Follow up from https://github.com/garronej/github_actions_toolkit

src/is_well_formed_and_available_module_name.ts

@@ -0,0 +1,58 @@
+
+
+import { setOutputFactory } from "./outputHelper";
+import { getActionParamsFactory } from "./inputHelper";
+import { is404 } from "./tools/is404";
+
+import validate_npm_package_name from "validate-npm-package-name";
+    
+
+export const { getActionParams } = getActionParamsFactory({
+    "inputNameSubset": [
+        "module_name"
+    ] as const
+});
+
+export type Params = ReturnType<typeof getActionParams>;
+
+type CoreLike = {
+    debug: (message: string) => void;
+};
+
+export const { setOutput } = setOutputFactory<
+    "is_valid_node_module_name" |
+    "is_valid_deno_module_name" |
+    "is_available_on_npm" |
+    "is_available_on_deno_land"
+>();
+
+export async function action(
+    _actionName: "is_well_formed_and_available_module_name",
+    params: Params,
+    core: CoreLike
+): Promise<Parameters<typeof setOutput>[0]> {
+
+    const { module_name } = params;
+
+    const { validForNewPackages } = validate_npm_package_name(module_name);
+
+    const validForDenoPackages = validForNewPackages && module_name.indexOf("-") < 0
+
+    return {
+        "is_valid_node_module_name": validForNewPackages ? "true" : "false",
+        "is_available_on_npm":
+            !validForNewPackages ?
+                "false"
+                :
+                (await is404(`https://www.npmjs.com/package/${module_name}`)) ?
+                    "true" : "false",
+        "is_valid_deno_module_name": validForDenoPackages ? "true" : "false",
+        "is_available_on_deno_land":
+            !validForDenoPackages ?
+                "false"
+                :
+                (await is404(`https://deno.land/x/${module_name}/`)) ?
+                    "true" : "false"
+    };
+
+}