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semver = require('semver')\n\nconst pickInits = deps => {\n const inits = []\n if (deps['react-loadable']) {\n inits.push('react-loadable')\n }\n return inits\n}\n\nconst pickRouter = deps => {\n if (deps['react-router']) {\n if (semver.lt(deps['react-router'], '4.0.0')) {\n return 'react-router-v3'\n } else {\n return 'react-router-v4'\n }\n } else if (deps['react-router-dom']) {\n return 'react-router-v4'\n } else {\n return 'config-router'\n }\n}\n\nconst pickStatePromise = deps => {\n if (deps['redux']) {\n return 'config-redux'\n } else {\n return 'config-state'\n }\n}\n\nconst pickPreRenders = deps => {\n const preRenders = []\n if (deps['react-loadable']) {\n preRenders.push('react-loadable')\n }\n if (deps['react-redux']) {\n preRenders.push('react-redux')\n }\n if (deps['styled-components']) {\n if (deps['babel-plugin-styled-components']) {\n preRenders.push('styled-components')\n } else {\n throw new Error(\n 'Need to install \"babel-plugin-styled-components\" to be able to Server-Side Render styled-components'\n )\n }\n }\n return preRenders\n}\n\nconst pickRenderer = deps => {\n if (deps['react']) {\n if (semver.lt(deps['react'], '16.0.0')) {\n return 'react15'\n } else {\n return 'react16'\n }\n } else {\n throw new Error('Only support react in this profile for now')\n }\n}\n\nconst pickAfterRenders = deps => {\n const afterRenders = []\n if (deps['react-loadable']) {\n afterRenders.push('react-loadable')\n }\n if (deps['styled-components']) {\n afterRenders.push('styled-components')\n }\n if (deps['react-helmet']) {\n afterRenders.push('react-helmet')\n }\n return afterRenders\n}\n\nconst getLibs = strategy => {\n const list = Object.keys(strategy).reduce((list, elem) => {\n return list.concat(strategy[elem])\n }, [])\n return list.filter((item, pos, self) => self.indexOf(item) === pos)\n}\n\nconst createStrategy = deps => {\n try {\n const strategy = {}\n strategy.inits = pickInits(deps)\n strategy.router = pickRouter(deps)\n strategy.render = pickRenderer(deps)\n strategy.getStatePromise = pickStatePromise(deps)\n strategy.preRenders = pickPreRenders(deps)\n strategy.afterRenders = pickAfterRenders(deps)\n strategy.libs = getLibs(strategy)\n return strategy\n } catch (e) {\n console.error(\"We couldn't automatically figure out what plugins to use\")\n console.error(e.message)\n process.exit(-1)\n }\n}\n\nmodule.exports = createStrategy\n"]} |