Setup ICU Action

Setup full-icu dataset for the Node.js runtime GitHub Actions uses.

Deprecated

GitHub Actions now supports node16 runtime for JavaScript actions and Node.js 16 has full-icu support by default.

Consider migrating your actions to use node16.

Why do we need this?

GitHub Actions' JavaScript action supports only Node.js 12 as a runtime.

As Node.js 12 is built with --with-intl=small-icu option by default, it contains only English locales.

This gonna be problematic when we want to use ICU dependent features[^1] with non-English locales:

const options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' }
// Works properly for English locales
// want: "Friday, September 25, 2020", actual: "Friday, September 25, 2020"
console.log((new Date()).toLocaleDateString('en-US', options))
// NOT WORKING FOR NON-ENGLISH LOCALES!
// want: "2020年9月25日金曜日", actual: "Friday, September 25, 2020"
console.log((new Date()).toLocaleDateString('ja-JP', options))

This action fixes locale-related issues by installing full ICU datasets and setting NODE_ICU_DATA environment variable properly to let Node.js use them.

Getting Started

Common

Just run sarisia/setup-icu@v1 once in a job.

steps:
  - uses: sarisia/setup-icu@v1
  - uses: sarisia/action-uses-icu-function@v2

Avoid node command from failing

If your workflow has steps that run node command from shell, it may fail because of ICU version mismatch.

This may fail:

steps:
  - uses: actions/setup-node@v1
    with:
      node-version: 10
  - uses: sarisia/setup-icu@v1
  # THIS MAY FAIL!
  - run: node script.js

To avoid that, set noexport to true and set NODE_ICU_DATA to outputs.icu-data-dir manually:

steps:
  - uses: actions/setup-node@v1
    with:
      node-version: 10
  - uses: sarisia/setup-icu@v1
    id: setup-icu
    with:
      noexport: true
  - uses: sarisia/action-uses-icu-function@v2
    env:
      NODE_ICU_DATA: ${{ steps.setup-icu.outputs.icu-data-dir }}

Reference

Inputs

• noexport: Set true to avoid exporting NODE_ICU_DATA environment variable. Default: false

Outputs

• icu-data-dir: Path of the directory contains ICU data.

[^1] see documentation for full lists