improvement: Review snapshot behavior (#95)

* Improve git tag detection (#77)
* Only handle snapshot flag for release cmd (#94)
* Use core.info instead of console.log
* Update gitattributes

lib/git.js

@@ -0,0 +1,49 @@
+"use strict";
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+    result["default"] = mod;
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const child_process = __importStar(require("child_process"));
+const git = (args = []) => __awaiter(void 0, void 0, void 0, function* () {
+    const stdout = child_process.execSync(`git ${args.join(' ')}`, {
+        encoding: 'utf8'
+    });
+    return stdout.trim();
+});
+function isTagDirty(currentTag) {
+    return __awaiter(this, void 0, void 0, function* () {
+        try {
+            yield git(['describe', '--exact-match', '--tags', '--match', currentTag]);
+        }
+        catch (err) {
+            return true;
+        }
+        return false;
+    });
+}
+exports.isTagDirty = isTagDirty;
+function getTag() {
+    return __awaiter(this, void 0, void 0, function* () {
+        return yield git(['describe', '--tags', '--abbrev=0']);
+    });
+}
+exports.getTag = getTag;
+function getShortCommit() {
+    return __awaiter(this, void 0, void 0, function* () {
+        return yield git(['show', "--format='%h'", 'HEAD', '--quiet']);
+    });
+}
+exports.getShortCommit = getShortCommit;