fix config

Author: patricklx

config/ember-try.js

@@ -3,147 +3,76 @@
 const getChannelURL = require('ember-source-channel-url');
 
 module.exports = function() {
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   return Promise.all([
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     getChannelURL('release'),
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     getChannelURL('beta'),
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     getChannelURL('canary')
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   ]).then((urls) => {
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     return {
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+      usePnpm: true,
       scenarios: [
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         {
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           name: 'ember-lts-3.12',
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           env: {
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             EMBER_OPTIONAL_FEATURES: JSON.stringify({ 'jquery-integration': true })
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           },
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           npm: {
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             devDependencies: {
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               '@ember/jquery': '^0.5.1',
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               'ember-source': '~3.12.0'
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             }
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           }
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         },
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         {
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           name: 'ember-lts-2.18',
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           env: {
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             EMBER_OPTIONAL_FEATURES: JSON.stringify({ 'jquery-integration': true })
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           },
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           npm: {
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             devDependencies: {
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               '@ember/jquery': '^0.5.1',
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               'ember-source': '~2.18.0'
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             }
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           }
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         },
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         {
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           name: 'ember-release',
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           npm: {
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             devDependencies: {
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               'ember-source': urls[0]
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             }
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           }
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         },
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         {
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           name: 'ember-beta',
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           npm: {
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             devDependencies: {
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               'ember-source': urls[1]
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             }
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           }
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         },
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         {
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           name: 'ember-canary',
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           npm: {
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             devDependencies: {
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               'ember-source': urls[2]
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             }
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           }
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         },
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         {
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           name: 'ember-default-with-jquery',
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           env: {
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             EMBER_OPTIONAL_FEATURES: JSON.stringify({
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               'jquery-integration': true
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             })
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           },
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           npm: {
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             devDependencies: {
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               '@ember/jquery': '^0.5.1'
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             }
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           }
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         }
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       ]
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     };
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   });
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 };