Yarn: Brew Formula not found

[jb510]

brew install yarn reports "Error: No available formula with the name "yarn"`

I'm guessing this is related to the 0.17.10 vs 0.18.0 switch I see mentioned when I search for yarn, but am unsure if this is just me seeing this.

OS X 10.12, Brew 0.9.9

[bestander]

Yeah, odd, the formula is there https://github.com/Homebrew/homebrew-core/blob/master/Formula/yarn.rb.
Could that be a brew issue?

[jb510]

Could be... I really have no idea what would cause this or even where to start. However,

brew install node for example works (as do all the others I tested uninstalled/reinstalled). It's just yarn that isn't found.

[jb510]

Fixed, here's how:

cd /usr/local/Library/Formula
ls | grep yarn

hey look... no yarn.rb there... let's manually create it.

wget https://raw.githubusercontent.com/Homebrew/homebrew-core/master/Formula/yarn.rb

now let's try again

brew install yarn

Woo hoo it installed v0.18.1!

So I don't know why brew update wasn't getting that, again I'm guessing because of the 0.17.10 revert... but whatever... working.

[Jamiewarb]

Still experiencing this issue today. Above fix worked

[gregorskii]

Tried the above and got this:

Error: undefined method `rebuild' for #<BottleSpecification:0x007ff009881d68>
Please report this bug:
    https://git.io/brew-troubleshooting
/usr/local/Library/Taps/homebrew/homebrew-core/Formula/yarn.rb:12:in `block in <class:Yarn>'
/usr/local/Library/Homebrew/software_spec.rb:92:in `instance_eval'
/usr/local/Library/Homebrew/software_spec.rb:92:in `bottle'
/usr/local/Library/Homebrew/formula.rb:1788:in `bottle'
/usr/local/Library/Taps/homebrew/homebrew-core/Formula/yarn.rb:10:in `<class:Yarn>'
/usr/local/Library/Taps/homebrew/homebrew-core/Formula/yarn.rb:3:in `load_formula'
/usr/local/Library/Homebrew/formulary.rb:25:in `module_eval'
/usr/local/Library/Homebrew/formulary.rb:25:in `load_formula'
/usr/local/Library/Homebrew/formulary.rb:42:in `load_formula_from_path'
/usr/local/Library/Homebrew/formulary.rb:91:in `load_file'
/usr/local/Library/Homebrew/formulary.rb:82:in `klass'
/usr/local/Library/Homebrew/formulary.rb:78:in `get_formula'
/usr/local/Library/Homebrew/formulary.rb:215:in `factory'
/usr/local/Library/Homebrew/formulary.rb:374:in `find_with_priority'
/usr/local/Library/Homebrew/extend/ARGV.rb:20:in `block in formulae'
/usr/local/Library/Homebrew/extend/ARGV.rb:16:in `map'
/usr/local/Library/Homebrew/extend/ARGV.rb:16:in `formulae'
/usr/local/Library/Homebrew/cmd/install.rb:102:in `install'
/usr/local/Library/Homebrew/brew.rb:87:in `<main>'

Had to forcibly update brew per this discussion:

http://discourse.brew.sh/t/how-to-upgrade-brew-stuck-on-0-9-9/33/16

[Mletter1]

Like @Jamiewarb said Still experiencing this issue today. Above fix worked Homebrew 0.9.9

[tobyreynold]

THX! jb510

[dgreene1]

You can always uninstall/reinstall brew. I had to do that on an old laptop of mine that I was using during work travel.