@sap/cds-dk/lib/init/validate.js

Command line client and development toolkit for the SAP Cloud Application Programming Model

const { PROJECT_FILES } = require('./constants')
const REGEX_PROJECT_NAME = /[^0-9a-zA-Z_-]+/g
const cds = require('../../lib/cds')
const { exists } = cds.utils
const { bold } = require('../../lib/util/term')

module.exports.projectName = projectName => {
  if (!projectName) throw 'specify a project name'
  const invalidChars = new Set(projectName.match(REGEX_PROJECT_NAME)) // remove duplicates
  if (invalidChars.size > 0) {
    throw `project name '${projectName}' contains at least one character ('${[...invalidChars]}') which is not supported in npm package names.
Specify a different project name by replacing characters with '_' or '-', for example '${projectName.replace(REGEX_PROJECT_NAME, '_')}' or '${projectName.replace(REGEX_PROJECT_NAME, '-')}'.`
  }
}

module.exports.projectFolder = cwd => {
  if (cds.cli.options.force) return
  const existingProjectFile = PROJECT_FILES.find(exists)
  if (existingProjectFile) {
    if (cwd === cds.root) {
      throw `project already initialized (existing ${existingProjectFile})\nuse ${bold('cds add')} to add more features`
    }
    throw `project already initialized (existing ${existingProjectFile})\nuse a different project name instead`
  }
}