Function resolveDefine

rollup.config.js:170–218

()

  }

  function resolveDefine() {
    /** @type {Record<string, string>} */
    const replacements = {
      __COMMIT__: `"${process.env.COMMIT}"`,
      __VERSION__: `"${masterVersion}"`,
      // this is only used during Vue's internal tests
      __TEST__: `false`,
      // If the build is expected to run directly in the browser (global / esm builds)
      __BROWSER__: String(isBrowserBuild),
      __GLOBAL__: String(isGlobalBuild),
      __ESM_BUNDLER__: String(isBundlerESMBuild),
      __ESM_BROWSER__: String(isBrowserESMBuild),
      // is targeting Node (SSR)?
      __CJS__: String(isCJSBuild),
      // need SSR-specific branches?
      __SSR__: String(!isGlobalBuild),

      // 2.x compat build
      __COMPAT__: String(isCompatBuild),

      // feature flags
      __FEATURE_SUSPENSE__: `true`,
      __FEATURE_OPTIONS_API__: isBundlerESMBuild
        ? `__VUE_OPTIONS_API__`
        : `true`,
      __FEATURE_PROD_DEVTOOLS__: isBundlerESMBuild
        ? `__VUE_PROD_DEVTOOLS__`
        : `false`,
      __FEATURE_PROD_HYDRATION_MISMATCH_DETAILS__: isBundlerESMBuild
        ? `__VUE_PROD_HYDRATION_MISMATCH_DETAILS__`
        : `false`,
    }

    if (!isBundlerESMBuild) {
      // hard coded dev/prod builds
      replacements.__DEV__ = String(!isProductionBuild)
    }

    // allow inline overrides like
    //__RUNTIME_COMPILE__=true pnpm build runtime-core
    Object.keys(replacements).forEach(key => {
      if (key in process.env) {
        const value = process.env[key]
        assert(typeof value === 'string')
        replacements[key] = value
      }
    })
    return replacements
  }

  // esbuild define is a bit strict and only allows literal json or identifiers
  // so we still need replace plugin in some cases