isStaticExportProject.js

// Takes 1. Netlify config's build details and
// 2. the project's package.json scripts to determine if
// the Next.js app uses static HTML export
const isStaticExportProject = ({ build, scripts }) => {
  const NEXT_EXPORT_COMMAND = 'next export'

  if (!build.command) return false

  const isSetInNetlifyConfig = build.command.includes(NEXT_EXPORT_COMMAND)

  const isSetInNpmScript = Object.keys(scripts).find((script) => {
    const scriptValue = scripts[script]
    return build.command.includes(script) && scriptValue.includes(NEXT_EXPORT_COMMAND)
  })

  const isStaticExport = isSetInNetlifyConfig || isSetInNpmScript

  if (isStaticExport) {
    console.log(
      'NOTE: Static HTML export Next.js projects (projects that use `next export`) do not require most of this plugin. For these sites, this plugin *only* caches builds.',
    )
  }

  return isStaticExport
}

module.exports = isStaticExportProject