Use promises for suggestions
This commit is contained in:
Thaddee Tyl
parent
45b12a458f
commit
d75133fe18
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@ -25,7 +25,8 @@
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"redis": "~0.10.1",
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"camp": "~13.11.9",
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"semver": "~2.3.0",
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"bower": "~1.3.11"
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"bower": "~1.3.11",
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"promise": "~6.1.0"
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},
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"devDependencies": {
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"ass": "~0.0.6",
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205
suggest.js
205
suggest.js
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@ -1,5 +1,6 @@
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var nodeUrl = require('url');
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var request = require('request');
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var Promise = require('promise');
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var serverSecrets;
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try {
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// Everything that cannot be checked in but is useful server-side
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@ -24,117 +25,121 @@ var suggest = function(data, end, ask) {
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}
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};
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// url: string
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// cb: function({badges})
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var github = function(url, cb) {
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var badges = [];
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var userRepo = url.pathname.slice(1).split('/');
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var user = userRepo[0];
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var repo = userRepo[1];
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githubLicense(user, repo, function(err, badge) {
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if (err == null) {
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badges.push(badge);
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}
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Promise.all([
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githubLicense(user, repo),
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]).then(function(badges) {
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cb({badges:badges});
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}).catch(function(err) {
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cb({badges:badges, err:err});
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});
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};
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// user: eg, qubyte
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// repo: eg, rubidium
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// end: function(err, {link, badge})
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var githubLicense = function(user, repo, end) {
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// Step 1: Get the repo's default branch.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '';
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// Using our OAuth App secret grants us 5000 req/hour
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// instead of the standard 60 req/hour.
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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var badgeData = {text:['license',''], colorscheme:'blue'};
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// A special User-Agent is required:
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// http://developer.github.com/v3/#user-agent-required
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io' } }, function(err, res, buffer) {
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if (err != null) { end(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { end(Error('rate limited')); return; }
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var data = JSON.parse(buffer);
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var defaultBranch = data.default_branch;
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// Step 2: Get the SHA-1 hash of the branch tip.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '/branches/' + defaultBranch;
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io' } }, function(err, res, buffer) {
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if (err != null) { end(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { end(Error('rate limited')); return; }
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var data = JSON.parse(buffer);
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var branchTip = data.commit.sha;
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// Step 3: Get the tree at the commit.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '/git/trees/' + branchTip;
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io' } }, function(err, res, buffer) {
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if (err != null) { end(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { end(Error('rate limited')); return; }
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var data = JSON.parse(buffer);
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var treeArray = data.tree;
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var licenseBlob;
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var licenseFilename;
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// Crawl each file in the root directory
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for (var i = 0; i < treeArray.length; i++) {
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if (treeArray[i].type != 'blob') {
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continue;
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}
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if (treeArray[i].path.match(/(LICENSE|COPYING|COPYRIGHT).*/i)) {
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licenseBlob = treeArray[i].sha;
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licenseFilename = treeArray[i].path;
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break;
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}
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}
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// Could not find license file
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if (!licenseBlob) { end(Error('no license file')); return; }
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// Step 4: Get the license blob.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '/git/blobs/' + licenseBlob;
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var link = 'https://raw.githubusercontent.com/' +
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[user, repo, defaultBranch, licenseFilename].join('/');
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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// Get the raw blob instead of JSON
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// https://developer.github.com/v3/media/
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io', 'Accept': 'appplication/vnd.github.raw' } },
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function(err, res, buffer) {
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if (err != null) { end(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { end(Error('rate limited')); return; }
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var license = guessLicense(buffer);
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if (license) {
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badgeData.text[1] = license;
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end(null, {
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link: link,
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badge: shieldsBadge(badgeData),
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name: 'GitHub license'
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});
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return;
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} else {
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// Not a recognized license
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end(Error('unknown license'));
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return;
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// returns a promise of {link, badge, name}
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var githubLicense = function(user, repo) {
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return new Promise(function(resolve, reject) {
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// Step 1: Get the repo's default branch.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '';
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// Using our OAuth App secret grants us 5000 req/hour
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// instead of the standard 60 req/hour.
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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var badgeData = {text:['license',''], colorscheme:'blue'};
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// A special User-Agent is required:
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// http://developer.github.com/v3/#user-agent-required
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io' } }, function(err, res, buffer) {
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if (err != null) { reject(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { reject(Error('rate limited')); return; }
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var data = JSON.parse(buffer);
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var defaultBranch = data.default_branch;
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// Step 2: Get the SHA-1 hash of the branch tip.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '/branches/' + defaultBranch;
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io' } }, function(err, res, buffer) {
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if (err != null) { reject(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { reject(Error('rate limited')); return; }
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var data = JSON.parse(buffer);
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var branchTip = data.commit.sha;
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// Step 3: Get the tree at the commit.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '/git/trees/' + branchTip;
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io' } }, function(err, res, buffer) {
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if (err != null) { reject(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { reject(Error('rate limited')); return; }
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var data = JSON.parse(buffer);
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var treeArray = data.tree;
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var licenseBlob;
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var licenseFilename;
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// Crawl each file in the root directory
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for (var i = 0; i < treeArray.length; i++) {
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if (treeArray[i].type != 'blob') {
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continue;
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}
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} catch(e) { end(e); return; }
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});
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} catch(e) { end(e); return; }
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});
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} catch(e) { end(e); return; }
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});
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} catch(e) { end(e); return; }
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if (treeArray[i].path.match(/(LICENSE|COPYING|COPYRIGHT).*/i)) {
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licenseBlob = treeArray[i].sha;
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licenseFilename = treeArray[i].path;
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break;
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}
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}
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// Could not find license file
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if (!licenseBlob) { reject(Error('no license file')); return; }
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// Step 4: Get the license blob.
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var apiUrl = 'https://api.github.com/repos/' + user + '/' + repo + '/git/blobs/' + licenseBlob;
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var link = 'https://raw.githubusercontent.com/' +
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[user, repo, defaultBranch, licenseFilename].join('/');
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if (serverSecrets) {
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apiUrl += '?client_id=' + serverSecrets.gh_client_id
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+ '&client_secret=' + serverSecrets.gh_client_secret;
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}
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// Get the raw blob instead of JSON
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// https://developer.github.com/v3/media/
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request(apiUrl, { headers: { 'User-Agent': 'Shields.io', 'Accept': 'appplication/vnd.github.raw' } },
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function(err, res, buffer) {
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if (err != null) { reject(err); return; }
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try {
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if ((+res.headers['x-ratelimit-remaining']) === 0) { reject(Error('rate limited')); return; }
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var license = guessLicense(buffer);
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if (license) {
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badgeData.text[1] = license;
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resolve({
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link: link,
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badge: shieldsBadge(badgeData),
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name: 'GitHub license'
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});
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return;
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} else {
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// Not a recognized license
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reject(Error('unknown license'));
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return;
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}
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} catch(e) { reject(e); return; }
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});
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} catch(e) { reject(e); return; }
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});
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} catch(e) { reject(e); return; }
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});
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} catch(e) { reject(e); return; }
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});
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});
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};
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