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check for node version from config files

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Alex Sanders 2021-09-24 12:11:27 +01:00
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@ -26,7 +26,24 @@ steps:
- run: npm test
```
The `node-version` input is optional. If not supplied, the node version from PATH will be used. However, it is recommended to always specify Node.js version and don't rely on the system one.
The `node-version` input is optional. If not supplied, the following files are checked:
1. `.n-node-version`
2. `.naverc`
3. `.node-version`
4. `.nodeenvrc`
5. `.nvmrc` (accurately [parsing nvm versions](https://github.com/ehmicky/node-version-alias))
6. `package.json#engines.node`
and finally the following environment variables:
7. `NODIST_NODE_VERSION`
8. `NODE_VERSION`
9. `DEFAULT_NODE_VERSION`
If none of these are present, finally the node version from PATH will be used. However, it is recommended to always specify Node.js version and don't rely on the system one.
> Behind the scenes, it uses [@ehmicky](https://github.com/ehmicky)'s [`preferred-node-version`](https://www.npmjs.com/package/) 😍.
The action will first check the local cache for a semver match. If unable to find a specific version in the cache, the action will attempt to download a version of Node.js. It will pull LTS versions from [node-versions releases](https://github.com/actions/node-versions/releases) and on miss or failure will fall back to the previous behavior of downloading directly from [node dist](https://nodejs.org/dist/).