@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')

// max. 64 chars, starts with letter, number, '_', contains only letters (upper and lower case), numbers, '_' or '-'
const REGEX_PROJECT_NAME = /^[0-9a-z_][0-9a-z_-]{0,63}$/i

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.'
  if (!projectName.match(REGEX_PROJECT_NAME)) {
    throw `This project name is not supported.
Specify a different project name which
 starts with a letter, number or '_' and
 contains only letters, numbers, '_' or '-' and
 is 64 characters or less.`
  }
}

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`
  }
}