Implement branch list using callbacks from exec function (#1045)

When trying to list local branches to figure out what needs cleaned up during runs on non-ephemeral Actions Runners, we use git rev-parse --symbolic-full-name to get a list of branches. This can lead to ambiguous ref name errors when there are branches and tags with similar names.

Part of the reason we use rev-parse --symbolic-full-name vs git branch --list or git rev-parse --symbolic seems to related to a bug in Git 2.18. Until we can deprecate our usage of Git 2.18, I think we need to keep --symbolic-full-name. Since part of the problem is that these ambiguous ref name errors clog the Actions annotation limits, this is a mitigation to suppress those messages until we can get rid of the workaround.

1 files changed, 96 insertions, 29 deletions

diff --git a/dist/index.js b/dist/index.js
index 96be2f8..ff064d5 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -7441,8 +7441,10 @@ class GitCommandManager {
             const result = [];
             // Note, this implementation uses "rev-parse --symbolic-full-name" because the output from
             // "branch --list" is more difficult when in a detached HEAD state.
-            // Note, this implementation uses "rev-parse --symbolic-full-name" because there is a bug
-            // in Git 2.18 that causes "rev-parse --symbolic" to output symbolic full names.
+            // TODO(https://github.com/actions/checkout/issues/786): this implementation uses
+            // "rev-parse --symbolic-full-name" because there is a bug
+            // in Git 2.18 that causes "rev-parse --symbolic" to output symbolic full names. When
+            // 2.18 is no longer supported, we can switch back to --symbolic.
             const args = ['rev-parse', '--symbolic-full-name'];
             if (remote) {
                 args.push('--remotes=origin');
@@ -7450,18 +7452,42 @@ class GitCommandManager {
             else {
                 args.push('--branches');
             }
-            const output = yield this.execGit(args);
-            for (let branch of output.stdout.trim().split('\n')) {
+            const stderr = [];
+            const errline = [];
+            const stdout = [];
+            const stdline = [];
+            const listeners = {
+                stderr: (data) => {
+                    stderr.push(data.toString());
+                },
+                errline: (data) => {
+                    errline.push(data.toString());
+                },
+                stdout: (data) => {
+                    stdout.push(data.toString());
+                },
+                stdline: (data) => {
+                    stdline.push(data.toString());
+                }
+            };
+            // Suppress the output in order to avoid flooding annotations with innocuous errors.
+            yield this.execGit(args, false, true, listeners);
+            core.debug(`stderr callback is: ${stderr}`);
+            core.debug(`errline callback is: ${errline}`);
+            core.debug(`stdout callback is: ${stdout}`);
+            core.debug(`stdline callback is: ${stdline}`);
+            for (let branch of stdline) {
                 branch = branch.trim();
-                if (branch) {
-                    if (branch.startsWith('refs/heads/')) {
-                        branch = branch.substr('refs/heads/'.length);
-                    }
-                    else if (branch.startsWith('refs/remotes/')) {
-                        branch = branch.substr('refs/remotes/'.length);
-                    }
-                    result.push(branch);
+                if (!branch) {
+                    continue;
+                }
+                if (branch.startsWith('refs/heads/')) {
+                    branch = branch.substring('refs/heads/'.length);
+                }
+                else if (branch.startsWith('refs/remotes/')) {
+                    branch = branch.substring('refs/remotes/'.length);
                 }
+                result.push(branch);
             }
             return result;
         });
@@ -7712,7 +7738,7 @@ class GitCommandManager {
             return result;
         });
     }
-    execGit(args, allowAllExitCodes = false, silent = false) {
+    execGit(args, allowAllExitCodes = false, silent = false, customListeners = {}) {
         return __awaiter(this, void 0, void 0, function* () {
             fshelper.directoryExistsSync(this.workingDirectory, true);
             const result = new GitOutput();
@@ -7723,20 +7749,24 @@ class GitCommandManager {
             for (const key of Object.keys(this.gitEnv)) {
                 env[key] = this.gitEnv[key];
             }
+            const defaultListener = {
+                stdout: (data) => {
+                    stdout.push(data.toString());
+                }
+            };
+            const mergedListeners = Object.assign(Object.assign({}, defaultListener), customListeners);
             const stdout = [];
             const options = {
                 cwd: this.workingDirectory,
                 env,
                 silent,
                 ignoreReturnCode: allowAllExitCodes,
-                listeners: {
-                    stdout: (data) => {
-                        stdout.push(data.toString());
-                    }
-                }
+                listeners: mergedListeners
             };
             result.exitCode = yield exec.exec(`"${this.gitPath}"`, args, options);
             result.stdout = stdout.join('');
+            core.debug(result.exitCode.toString());
+            core.debug(result.stdout);
             return result;
         });
     }
@@ -13947,6 +13977,7 @@ var encode = function encode(str, defaultEncoder, charset, kind, format) {
 
         i += 1;
         c = 0x10000 + (((c & 0x3FF) << 10) | (string.charCodeAt(i) & 0x3FF));
+        /* eslint operator-linebreak: [2, "before"] */
         out += hexTable[0xF0 | (c >> 18)]
             + hexTable[0x80 | ((c >> 12) & 0x3F)]
             + hexTable[0x80 | ((c >> 6) & 0x3F)]
@@ -17572,7 +17603,7 @@ var parseObject = function (chain, val, options, valuesParsed) {
             ) {
                 obj = [];
                 obj[index] = leaf;
-            } else {
+            } else if (cleanRoot !== '__proto__') {
                 obj[cleanRoot] = leaf;
             }
         }
@@ -34704,6 +34735,7 @@ var arrayPrefixGenerators = {
 };
 
 var isArray = Array.isArray;
+var split = String.prototype.split;
 var push = Array.prototype.push;
 var pushToArray = function (arr, valueOrArray) {
     push.apply(arr, isArray(valueOrArray) ? valueOrArray : [valueOrArray]);
@@ -34740,10 +34772,13 @@ var isNonNullishPrimitive = function isNonNullishPrimitive(v) {
         || typeof v === 'bigint';
 };
 
+var sentinel = {};
+
 var stringify = function stringify(
     object,
     prefix,
     generateArrayPrefix,
+    commaRoundTrip,
     strictNullHandling,
     skipNulls,
     encoder,
@@ -34759,8 +34794,23 @@ var stringify = function stringify(
 ) {
     var obj = object;
 
-    if (sideChannel.has(object)) {
-        throw new RangeError('Cyclic object value');
+    var tmpSc = sideChannel;
+    var step = 0;
+    var findFlag = false;
+    while ((tmpSc = tmpSc.get(sentinel)) !== void undefined && !findFlag) {
+        // Where object last appeared in the ref tree
+        var pos = tmpSc.get(object);
+        step += 1;
+        if (typeof pos !== 'undefined') {
+            if (pos === step) {
+                throw new RangeError('Cyclic object value');
+            } else {
+                findFlag = true; // Break while
+            }
+        }
+        if (typeof tmpSc.get(sentinel) === 'undefined') {
+            step = 0;
+        }
     }
 
     if (typeof filter === 'function') {
@@ -34787,6 +34837,14 @@ var stringify = function stringify(
     if (isNonNullishPrimitive(obj) || utils.isBuffer(obj)) {
         if (encoder) {
             var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset, 'key', format);
+            if (generateArrayPrefix === 'comma' && encodeValuesOnly) {
+                var valuesArray = split.call(String(obj), ',');
+                var valuesJoined = '';
+                for (var i = 0; i < valuesArray.length; ++i) {
+                    valuesJoined += (i === 0 ? '' : ',') + formatter(encoder(valuesArray[i], defaults.encoder, charset, 'value', format));
+                }
+                return [formatter(keyValue) + (commaRoundTrip && isArray(obj) && valuesArray.length === 1 ? '[]' : '') + '=' + valuesJoined];
+            }
             return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder, charset, 'value', format))];
         }
         return [formatter(prefix) + '=' + formatter(String(obj))];
@@ -34801,7 +34859,7 @@ var stringify = function stringify(
     var objKeys;
     if (generateArrayPrefix === 'comma' && isArray(obj)) {
         // we need to join elements in
-        objKeys = [{ value: obj.length > 0 ? obj.join(',') || null : undefined }];
+        objKeys = [{ value: obj.length > 0 ? obj.join(',') || null : void undefined }];
     } else if (isArray(filter)) {
         objKeys = filter;
     } else {
@@ -34809,24 +34867,28 @@ var stringify = function stringify(
         objKeys = sort ? keys.sort(sort) : keys;
     }
 
-    for (var i = 0; i < objKeys.length; ++i) {
-        var key = objKeys[i];
-        var value = typeof key === 'object' && key.value !== undefined ? key.value : obj[key];
+    var adjustedPrefix = commaRoundTrip && isArray(obj) && obj.length === 1 ? prefix + '[]' : prefix;
+
+    for (var j = 0; j < objKeys.length; ++j) {
+        var key = objKeys[j];
+        var value = typeof key === 'object' && typeof key.value !== 'undefined' ? key.value : obj[key];
 
         if (skipNulls && value === null) {
             continue;
         }
 
         var keyPrefix = isArray(obj)
-            ? typeof generateArrayPrefix === 'function' ? generateArrayPrefix(prefix, key) : prefix
-            : prefix + (allowDots ? '.' + key : '[' + key + ']');
+            ? typeof generateArrayPrefix === 'function' ? generateArrayPrefix(adjustedPrefix, key) : adjustedPrefix
+            : adjustedPrefix + (allowDots ? '.' + key : '[' + key + ']');
 
-        sideChannel.set(object, true);
+        sideChannel.set(object, step);
         var valueSideChannel = getSideChannel();
+        valueSideChannel.set(sentinel, sideChannel);
         pushToArray(values, stringify(
             value,
             keyPrefix,
             generateArrayPrefix,
+            commaRoundTrip,
             strictNullHandling,
             skipNulls,
             encoder,
@@ -34850,7 +34912,7 @@ var normalizeStringifyOptions = function normalizeStringifyOptions(opts) {
         return defaults;
     }
 
-    if (opts.encoder !== null && opts.encoder !== undefined && typeof opts.encoder !== 'function') {
+    if (opts.encoder !== null && typeof opts.encoder !== 'undefined' && typeof opts.encoder !== 'function') {
         throw new TypeError('Encoder has to be a function.');
     }
 
@@ -34923,6 +34985,10 @@ module.exports = function (object, opts) {
     }
 
     var generateArrayPrefix = arrayPrefixGenerators[arrayFormat];
+    if (opts && 'commaRoundTrip' in opts && typeof opts.commaRoundTrip !== 'boolean') {
+        throw new TypeError('`commaRoundTrip` must be a boolean, or absent');
+    }
+    var commaRoundTrip = generateArrayPrefix === 'comma' && opts && opts.commaRoundTrip;
 
     if (!objKeys) {
         objKeys = Object.keys(obj);
@@ -34943,6 +35009,7 @@ module.exports = function (object, opts) {
             obj[key],
             key,
             generateArrayPrefix,
+            commaRoundTrip,
             options.strictNullHandling,
             options.skipNulls,
             options.encode ? options.encoder : null,