Can't install

[ghost]

HEAD is now at 6968c199e Merge pull request #10284 from reitermarkus/reinstall-cask-options
fatal: Could not resolve HEAD to a revision
==> Installation successful!

why Could not resolve HEAD to a revision??

[gromgit]

What is the full output of the install?

Also please post the output of brew config and brew doctor.

[marcelloromani]

Had the same error

OS: macOS Big Sur 11.2 (20D64)

Full ouput of the install:

$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
Password:
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew

Press RETURN to continue or any other key to abort
==> /usr/bin/sudo /usr/sbin/chown -R marcelloromani:admin /usr/local/Homebrew
==> Downloading and installing Homebrew...
HEAD is now at 214e88aff Merge pull request #10541 from mistydemeo/fix_ohai_stdout_or_stderr
fatal: Could not resolve HEAD to a revision
==> Installation successful!

==> Homebrew has enabled anonymous aggregate formulae and cask analytics.
Read the analytics documentation (and how to opt-out) here:
  https://docs.brew.sh/Analytics
No analytics data has been sent yet (or will be during this `install` run).

==> Homebrew is run entirely by unpaid volunteers. Please consider donating:
  https://github.com/Homebrew/brew#donations

==> Next steps:
- Run `brew help` to get started
- Further documentation:
    https://docs.brew.sh

$ brew config
HOMEBREW_VERSION: 3.0.0
ORIGIN: https://github.com/Homebrew/brew
HEAD: ebc7cc36a0e029d58fac8cebd1b5ff583b3fd95b
Last commit: 12 hours ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: (none)
Core tap last commit: never
Core tap branch: HEAD
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 4
Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: quad-core 64-bit kabylake
Clang: 12.0 build 1200
Git: 2.24.3 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 7.64.1 => /usr/bin/curl
macOS: 11.2-x86_64
CLT: 12.4.0.0.1.1610135815
Xcode: 12.4

$ brew doctor
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some taps are not on the default git origin branch and may not receive
updates. If this is a surprise to you, check out the default branch with:
  git -C $(brew --repo homebrew/core) checkout master

[saintlammy]

I've got this same issue and trying to get it resolved as well.

[marcelloromani]

This is a blocker for me, I haven't been able to install any package view brew since I reinstalled it on a fresh Big Sur MacPro.

Just tried to (re)install now and got:

From https://github.com/Homebrew/brew
 * [new branch]          dependabot/bundler/Library/Homebrew/sorbet-0.5.6277 -> origin/dependabot/bundler/Library/Homebrew/sorbet-0.5.6277
HEAD is now at 59dd425f4 Merge pull request #10579 from gibfahn/default_remote_name_tap
fatal: Could not resolve HEAD to a revision
Updated 1 tap (homebrew/cask).

If I try to install e.g. wget I get:

$ brew install wget
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
Error: No available formula or cask with the name "wget".
==> Searching for a previously deleted formula (in the last month)...
Error: No previously deleted formula found.
==> Searching taps on GitHub...
Error: No formulae found in taps.

Surely this must be affecting quite a lot of people?

[martinkiperszmidmeli]

Same issue

[gromgit]

What's the output of brew doctor?

[lagshetti20]

same issue for brew install gradle

[lagshetti20]

please suggest a solution for it

[gromgit]

What's the output of brew doctor?

[marcelloromani]

OK, so I was able to fix it like this:

$ brew doctor
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some taps are not on the default git origin branch and may not receive
updates. If this is a surprise to you, check out the default branch with:
  git -C $(brew --repo homebrew/core) checkout master

I executed the command suggested by doctor:

$  git -C $(brew --repo homebrew/core) checkout master
Updating files: 100% (5765/5765), done.
Branch 'master' set up to track remote branch 'master' from 'origin'.
Already on 'master'

after that, the system seemed fine:

$ brew doctor
Your system is ready to brew.

Test: brew install wget would fail, but after the above steps it worked fine.

[EricXiongLi]

Useful, thanks a lot

[QT4124]

thank you

[Eugenoo]

I've had a problem with php installation on MacOS Monterey. After this commands all works fine :)

[aeestrada21]

Thank you this really help me notice what the problem was, i follow the steps after the brew doctor command and it solve the problem.

[Cleevemadjouh]

Could help me to install Homebrew on my MacBook pro M1 monterey ?

I got this issue:

MacBook-Pro ~ % /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
==> Checking for sudo access (which may request your password)...
Password:
==> This script will install:
/opt/homebrew/bin/brew
/opt/homebrew/share/doc/homebrew
/opt/homebrew/share/man/man1/brew.1
/opt/homebrew/share/zsh/site-functions/_brew
/opt/homebrew/etc/bash_completion.d/brew
/opt/homebrew

Press RETURN/ENTER to continue or any other key to abort:
==> /usr/bin/sudo /usr/sbin/chown -R rone:admin /opt/homebrew
==> Downloading and installing Homebrew...
HEAD is now at c1a9ce62a Merge pull request #13163 from Homebrew/dependabot/bundler/Library/Homebrew/rubocop-rspec-2.10.0

[saintlammy]

I got it resolved this way on my BigSur also

OK, so I was able to fix it like this:

$ brew doctor

Please note that these warnings are just used to help the Homebrew maintainers

with debugging if you file an issue. If everything you use Homebrew for is

working fine: please don't worry or file an issue; just ignore this. Thanks!



Warning: Some taps are not on the default git origin branch and may not receive

updates. If this is a surprise to you, check out the default branch with:

  git -C $(brew --repo homebrew/core) checkout master

I executed the command suggested by doctor:

$  git -C $(brew --repo homebrew/core) checkout master

Updating files: 100% (5765/5765), done.

Branch 'master' set up to track remote branch 'master' from 'origin'.

Already on 'master'

after that, the system seemed fine:

$ brew doctor

Your system is ready to brew.

Test: brew install wget would fail, but after the above steps it worked fine.

[fredngo]

This appears to still be an issue on May 25, 2021 on newly-installed homebrew on Big Sur -- not too difficult for experienced folks to fix but extremely confounding to beginners who are following installation guides. Any way to automate the running of git -C $(brew --repo homebrew/core) checkout master instead of forcing folks to run that on the Terminal?

[carlocab]

The difficulty with automating it is that it's not clear when exactly the command should be run for the user. There are a number of reasons why someone might have a non-master branch checked out, and I don't know of a way to ascertain whether they apply.

[gromgit]

I can think of only one case where an automated fix could be safely done: If $(brew --repo homebrew/core) doesn't contain .git/config, the initial clone was never completed, and so it should be safe to automatically:

rm -fr $(brew --repo homebrew/core)
brew tap homebrew/core

[fredngo]

As far as I can tell, it has happened only on Big Sur during Homebrew initial installation, if that helps at all.

I would suggest the checkout master of homebrew/core be automated only during initial installation. So there must be a way to do the same detection as brew doctor does during initial installation, and doing the checkout then -- as I think having master checked out during installation would be the expected state, right? This avoids any "number of reasons why someone might have a non-master branch checked out".

[bradtchapman]

Same experience here. Reproducible on Big Sur 11.4 with an Intel Mac, Xcode Command Line Tools 12.5.

I had to run brew doctor to get this note:

Warning: Some taps are not on the default git origin branch and may not receive
updates. If this is a surprise to you, check out the default branch with:
  git -C $(brew --repo homebrew/core) checkout master

After running the suggested command, it's fine now.

$ git -C $(brew --repo homebrew/core) checkout master
Updating files: 100% (5935/5935), done.
$ brew doctor
Your system is ready to brew.
$ brew search ffmpeg
==> Formulae
ffmpeg               ffmpeg2theora        ffmpeg@2.8           ffmpegthumbnailer

This is 100% reproducible removing and reinstalling brew.

edit: questions...

1. what is it about Big Sur that requires this extra step?
2. is it possible to include this statement in the main branch and not impact macOS 10.15 and below?

[kristianrl]

I had the same issue on a fresh install of MacOS Monterey: @gromgit's solution solved the problem:

rm -fr $(brew --repo homebrew/core)
brew tap homebrew/core

[zmatin-sans]

ok so what do i do after i type in
brew --repo homebrew/core

do i then reinstall homebrew? becuase i tried that and it still gave me the fatal: Could not resolve HEAD to a revision, because that didnt work either.