Fixes #55 Add artifact validation which check to ensure it's not a directory

lib/ArtifactPathValidator.js

@@ -0,0 +1,58 @@
+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ArtifactPathValidator = void 0;
+const core = __importStar(require("@actions/core"));
+const fs_1 = require("fs");
+class ArtifactPathValidator {
+    constructor(errorsFailBuild, paths, pattern) {
+        this.paths = paths;
+        this.pattern = pattern;
+        this.errorsFailBuild = errorsFailBuild;
+    }
+    validate() {
+        this.verifyPathsNotEmpty();
+        return this.paths.filter((path) => this.verifyNotDirectory(path));
+    }
+    verifyPathsNotEmpty() {
+        if (this.paths.length == 0) {
+            const message = `Artifact pattern :${this.pattern} did not match any files`;
+            this.reportError(message);
+        }
+    }
+    verifyNotDirectory(path) {
+        const isDir = fs_1.statSync(path).isDirectory();
+        if (isDir) {
+            const message = `Artifact is a directory :${path}. Directories can not be uploaded to a release.`;
+            this.reportError(message);
+        }
+        return !isDir;
+    }
+    reportError(message) {
+        if (this.errorsFailBuild) {
+            throw Error(message);
+        }
+        else {
+            core.warning(message);
+        }
+    }
+}
+exports.ArtifactPathValidator = ArtifactPathValidator;