97 lines
2.1 KiB
JavaScript
97 lines
2.1 KiB
JavaScript
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if (typeof Promise === 'undefined') {
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throw new ReferenceError("Promise wrappers must be enabled to use the promise API");
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}
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function isAsyncCall (fn) {
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return /^[^)]+then\s*\)/.test(fn) || /\._run\(/.test(fn);
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}
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module.exports = function (baseDir) {
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var Git = require('./src/git');
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var gitFactory = require('./src');
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var git;
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var chain = Promise.resolve();
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try {
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git = gitFactory(baseDir);
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}
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catch (e) {
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chain = Promise.reject(e);
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}
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return Object.keys(Git.prototype).reduce(function (promiseApi, fn) {
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if (/^_|then/.test(fn)) {
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return promiseApi;
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}
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if (isAsyncCall(Git.prototype[fn])) {
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promiseApi[fn] = git ? asyncWrapper(fn, git) : function () {
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return chain;
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};
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}
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else {
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promiseApi[fn] = git ? syncWrapper(fn, git, promiseApi) : function () {
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return promiseApi;
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};
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}
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return promiseApi;
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}, {});
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function asyncWrapper (fn, git) {
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return function () {
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var args = [].slice.call(arguments);
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if (typeof args[args.length] === 'function') {
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throw new TypeError(
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"Promise interface requires that handlers are not supplied inline, " +
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"trailing function not allowed in call to " + fn);
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}
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return chain.then(function () {
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return new Promise(function (resolve, reject) {
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args.push(function (err, result) {
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if (err) {
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return reject(toError(err));
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}
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resolve(result);
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});
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git[fn].apply(git, args);
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});
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});
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};
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}
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function syncWrapper (fn, git, api) {
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return function () {
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git[fn].apply(git, arguments);
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return api;
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};
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}
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};
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function toError (error) {
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if (error instanceof Error) {
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return error;
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}
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if (typeof error === 'string') {
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return new Error(error);
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}
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return Object.create(new Error(error), {
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git: { value: error },
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});
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}
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