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Merge pull request #131 from adaptlearning/develop
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| var async = require('async'); | ||
| var Q = require('q'); | ||
| var request = require('request'); | ||
| var semver = require('semver'); | ||
| var Constants = require('../Constants'); | ||
| var _ = require('lodash'); | ||
|
|
||
| module.exports = function () { | ||
| var deferred = Q.defer(); | ||
|
|
||
| checkLatestAdaptRepoVersion(function (error, latestFrameworkTag) { | ||
| if (error) { | ||
| deferred.reject(error); | ||
| } else { | ||
| deferred.resolve(latestFrameworkTag); | ||
| } | ||
| }); | ||
|
|
||
| return deferred.promise; | ||
| } | ||
|
|
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| function checkLatestAdaptRepoVersion(versionLimit, callback) { | ||
| if (typeof versionLimit === 'function') { | ||
| callback = versionLimit; | ||
| versionLimit = undefined; | ||
| } | ||
| // used in pagination | ||
| var nextPage = `https://api.github.com/repos/${Constants.DefaultGitHubOrg}/${Constants.FrameworkRepositoryName}/releases`; | ||
|
|
||
| var _getReleases = function (done) { | ||
| request({ | ||
| headers: { | ||
| 'User-Agent': Constants.DefaultUserAgent | ||
| }, | ||
| uri: nextPage, | ||
| method: 'GET' | ||
| }, done); | ||
| }; | ||
| var _requestHandler = function (error, response, body) { | ||
| if (response) { | ||
| // we've exceeded the API limit | ||
| if (response.statusCode === 403 && response.headers['x-ratelimit-remaining'] === '0') { | ||
| var reqsReset = new Date(response.headers['x-ratelimit-reset'] * 1000); | ||
| error = `You have exceeded GitHub's request limit of ${response.headers['x-ratelimit-limit']} requests per hour. Please wait until at least ${reqsReset.toTimeString()} before trying again.`; | ||
| } | ||
| else if (response.statusCode !== 200) { | ||
| error = 'GitubAPI did not respond with a 200 status code.'; | ||
| } | ||
| } | ||
| if (error) { | ||
| return callback(new Error(`Couldn't check latest version of ${Constants.FrameworkRepositoryName}. ${error}`)); | ||
| } | ||
| nextPage = parseLinkHeader(response.headers.link).next; | ||
| try { | ||
| // parse and sort releases (newest first) | ||
| var releases = JSON.parse(body).sort((a, b) => { | ||
| if (semver.lt(a.tag_name, b.tag_name)) return 1; | ||
| if (semver.gt(a.tag_name, b.tag_name)) return -1; | ||
| return 0; | ||
| }); | ||
| } catch (e) { | ||
| return callback(new Error(`Failed to parse GitHub release data\n${e}`)); | ||
| } | ||
| var compatibleRelease; | ||
| async.someSeries(releases, function (release, cb) { | ||
| var isFullRelease = !release.draft && !release.prerelease; | ||
| var satisfiesVersion = !versionLimit || semver.satisfies(release.tag_name, versionLimit); | ||
|
|
||
| if (!isFullRelease || !satisfiesVersion) { | ||
| return cb(null, false); | ||
| } | ||
|
|
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| compatibleRelease = release; | ||
| return cb(null, true); | ||
| }, function (error, satisfied) { | ||
| if (!satisfied) { | ||
| if (nextPage) { | ||
| return _getReleases(_requestHandler); | ||
| } | ||
| error = new Error(`Couldn't find any releases compatible with specified framework version (${versionLimit}), please check that it is a valid version.`); | ||
| } | ||
| if (error) { | ||
| return callback(error); | ||
| } | ||
| callback(error, compatibleRelease.tag_name); | ||
| }); | ||
| }; | ||
| // start recursion | ||
| _getReleases(_requestHandler); | ||
| } | ||
|
|
||
| // taken from https://gist.github.com/niallo/3109252 | ||
| function parseLinkHeader(header) { | ||
| if (!header || header.length === 0) { | ||
| return []; | ||
| } | ||
| var links = {}; | ||
| // Parse each part into a named link | ||
| _.each(header.split(','), function (p) { | ||
| var section = p.split(';'); | ||
| if (section.length !== 2) { | ||
| throw new Error("section could not be split on ';'"); | ||
| } | ||
| var url = section[0].replace(/<(.*)>/, '$1').trim(); | ||
| var name = section[1].replace(/rel="(.*)"/, '$1').trim(); | ||
| links[name] = url; | ||
| }); | ||
| return links; | ||
| } |
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