fly-babel

library2.1.1jsnpmunverified

Babel plugin for the Fly build system, version 2.1.1. It allows you to transpile ES6/ES2015+ code using Babel within Fly pipelines. The plugin supports standard Babel options (presets, plugins, sourceMaps, etc.) and a preload feature that automatically loads Babel plugins/presets from package.json. Release cadence is low; last release was in 2018. Key differentiator: tight integration with Fly, including preloading and simple generator-based task syntax. Requires Node >= 4.6 and Fly 2.0+.

devops web-framework

npm install fly-babel

github ↗package ↗

INSTALL

IMPORT

SIG · FLY-BABEL

fly-babel

devopsjavascriptv2.1.1

Install

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Import

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Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

fly-babel plugin

✓ const flyBabel = require('fly-babel'); // used internally by Fly, no direct import in user code

✗ import flyBabel from 'fly-babel';

Plugin is mounted via Fly's system; user does not import directly. Instead, configure in .fly.js or flyfile.js.

.babel()

✓ yield fly.source('src/**/*.js').babel({ presets: ['es2015'] }).target('dist/');

✗ fly.source('src/**/*.js').babel().target();

Method is chained on Fly's source/target stream. Must be inside a generator function (function *).

options.preload

✓ yield fly.source('src/**/*.js').babel({ preload: true }).target('dist/');

✗ yield fly.source('src/**/*.js').babel({ preload: false });

preload: true automatically loads Babel plugins/presets from package.json. Default false.

Shows basic usage of fly-babel with Babel presets and source maps in a Fly task.

// In your flyfile.js const fly = require('fly'); export default function* (fly) { yield fly.source('src/**/*.js') .babel({ presets: ['@babel/preset-env'], sourceMaps: 'inline' }) .target('dist/'); }

Debug

Known issues

breakingVersion 2.1.0 dropped Node 4.x support; requires Node >= 6.x.

fix

Upgrade Node to >=6.x, or use fly-babel@0.2.1 for Node 4.x support.

affects: >=2.1.0

deprecatedThis plugin is for the legacy Fly build system (flyjs). Fly is no longer maintained.

fix

Consider migrating to modern build tools like Webpack, Rollup, or esbuild.

affects: *

gotchaThe .babel() method must be called inside a generator function (function *). Using async/await or regular functions will fail.

fix

Use 'function * (fly) { ... }' syntax. Promises are not supported.

affects: *

gotchapreload: true only works if babel plugins/presets are listed in package.json under 'devDependencies' or 'dependencies' and named conventionally (e.g., 'babel-preset-*' or 'babel-plugin-*').

fix

Ensure packages are installed and named properly. For custom names, configure presets/plugins manually.

affects: *

gotchaSource maps may not work correctly if the source is processed by multiple plugins (e.g., fly-clear or fly-concat).

fix

Test source map output; consider using 'inline' or 'both' for simpler debugging.

affects: *

Errors

Common errors & fixes

TypeError: fly.source(...).babel is not a function

fly-babel plugin not installed or not registered with Fly.

fix

Run `npm install --save-dev fly-babel` and ensure Fly is configured to load the plugin (e.g., via 'fly clear' or plugin registration).

Error: Couldn't find preset 'es2015' relative to directory

Required Babel preset not installed.

fix

Install the preset: `npm install --save-dev @babel/preset-env` (or babel-preset-es2015 for older Babel).

ReferenceError: regeneratorRuntime is not defined

Using ES6 generators (async/await) without proper Babel runtime polyfill.

fix

Install and configure 'babel-plugin-transform-runtime' or include 'babel-polyfill' in your code.

Upgrade

Version history

2.1.1latest on npm

Audit

Dependencies

flyrequiredPeer dependency; requires Fly 2.0+ to mount plugin.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/bucaran/fly-babel ↗

packagehttps://www.npmjs.com/package/fly-babel ↗