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Update Corepack instructions in installation.md #504

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Jan 27, 2024
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Update Corepack instructions in installation.md #504

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Update Corepack instructions in `installation.md`
aduh95 Jan 24, 2024
c4afe60
Update docs/installation.md
aduh95 Jan 24, 2024
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14 changes: 6 additions & 8 deletions docs/installation.md
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Expand Up @@ -67,7 +67,7 @@ If you have installed Node.js with `pnpm env` Corepack won't be installed on you
:::

```
corepack enable
corepack enable pnpm
```

If you installed Node.js using Homebrew, you'll need to install corepack separately:
Expand All @@ -76,18 +76,16 @@ If you installed Node.js using Homebrew, you'll need to install corepack separat
brew install corepack
```

This will automatically install pnpm on your system. However, it probably won't be the latest version of pnpm. To upgrade it, check what is the [latest pnpm version](https://github.com/pnpm/pnpm/releases/latest) and run:
This will automatically install pnpm on your system.

```
corepack prepare pnpm@<version> --activate
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what if I don't want to use the packageManager field just install the latest pnpm version globally?

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You should expect Corepack to download the latest version on the first use. After that, if you want to manually bump it, you can run corepack install --global pnpm@latest (or the old corepack prepare command, that still works).

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So corepack enable pnpm installs the latest version? It used to install some hardcoded stable version.

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The short answer is "yes". The long answer is:
Technically, corepack enable pnpm only adds a binary on the PATH; pnpm will be downloaded only when it's first needed (so either when calling corepack pnpm … or using the pnpm bin created by corepack enable), and here are the steps that Corepack takes to determine what version to use:

  • if there's a local package.json with a "packageManager" field, use the version defined there.
  • otherwise, check if there's a cached global version, if so, use that.
  • otherwise, check if env variable COREPACK_DEFAULT_TO_LATEST was set to 0, in which case, use the hard coded version.
  • otherwise, use the latest version from the npm registry.
    It did use to default to the hardcoded version, but that was a while back.

```

With Node.js v16.17 or newer, you may install the `latest` version of pnpm by just specifying the tag:
You can pin the version of pnpm used on your project useing the following command:
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```
corepack prepare pnpm@latest --activate
corepack use pnpm@latest
```

This will add a `"packageManager"` field in your local `package.json` which will instruct Corepack to always use a specific version on that project. This can be useful if you want reproducability, as all developers who are using Corepack will use the same version as you. When a new version of pnpm is released, you can re-run the above command.

## Using npm

We provide two packages of pnpm CLI, `pnpm` and `@pnpm/exe`.
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