This post goes over how to edit a Homebrew formulae.

## Upgrade

Upgrade formulae `<formulae>`

to get the latest upstream:

```
brew upgrade <formulae>
```

If the formulae is up-to-date, you’ll get the output:

```
Warning: <formulae> already installed
```

## Edit

Edit the formulae:

```
brew edit <formulae>
```

To edit the formulae with a different `EDITOR`

like nano:

```
EDITOR=nano brew edit <formulae>
```

Then install the edited formulae:

```
brew upgrade <formulae>
```