brew tap facebook/fb results in Fetching error - macos

I try to update Homebrew as usual. Recently when I issue the command brew update, the following error occurs:
Error: Fetching /usr/local/Homebrew/Library/Taps/facebook/homebrew-fb failed!
The Tap is associated with the software Buck, which I need for development.
I further investigate the issue by following the installation instruction in the Buck official website, I issue the command again:
% brew tap facebook/fb
==> Unshallowing facebook/fb
fatal: couldn't find remote ref refs/heads/master
Error: Failure while executing; `git fetch --unshallow` exited with 128.
Apparently, the Git source has problems. I try to "untap" it:
% brew untap facebook/fb
Error: Refusing to untap facebook/fb because it contains the following installed formulae or casks:
buck
No luck. How can I resolve this problem?

This error is the result of Facebook renaming the branch master to main.
To fix this, first change into Homebrew's local tap folder:
cd /usr/local/Homebrew/Library/Taps/facebook/homebrew-fb
Then, run the following Git commands to update the local repo:
git branch --unset-upstream
git config remote.origin.fetch '+refs/heads/main:refs/remotes/origin/main'
git fetch --prune origin
git branch -m main
git branch -u origin/main
git remote set-head origin -a
Finally, remove the no longer needed master ref (optional):
rm .git/refs/remotes/origin/master
That's it, you should now be able to successfully run brew update.

Related

Home Brew install package getting could not resolve HEAD to a revision

I just installed the latest homebrew with version Homebrew 2.7.3. I have git pre-install on my Mac OS, and I was trying to install brew install git-crypt & brew install git-gui and getting an error on fatal: Could not resolve HEAD to a revision. It looks like it failed on any packages.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
Error: No available formula or cask with the name "git-crypt".
==> 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.
I tried uninstall then re-install homebrew using their command line : https://github.com/homebrew/install#uninstall-homebrew
By running brew doctor, I am getting some warnings :
Warning: "config" scripts exist outside your system or Homebrew directories.
`./configure` scripts often look for *-config scripts to determine if
software packages are installed, and which additional flags to use when
compiling and linking.
Having additional scripts in your path can confuse software installed via
Homebrew if the config script overrides a system or Homebrew-provided
script of the same name. We found the following "config" scripts:
/Library/Frameworks/Python.framework/Versions/3.8/bin/python3-config
/Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8-config
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 checked this directory
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core
and realize there's no Formula folder.
Any help would be appreciate.
I had this error and solved with
git -C $(brew --repo homebrew/core) checkout master

'git init -b <branch name>' command in terminal is throwing an 'unknown switch' error

I am trying to add an existing project to GitHub using the command line. I am in the relevant working directory in the terminal and am trying to use the git init -b main command.
Initially, I was getting an error relating to xcode:
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
I tried xcode-select --install but the software was unavailable from the update server, so I downloaded 'Command Line Tools for Xcode 12' from https://developer.apple.com/download/more/.
Now on entering git init -b main I am getting the following:
error: unknown switch `b'
usage: git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]
--template <template-directory>
directory from which templates will be used
--bare create a bare repository
--shared[=<permissions>]
specify that the git repository is to be shared amongst several users
-q, --quiet be quiet
--separate-git-dir <gitdir>
separate git dir from working tree
I am running git version: 2.24.3 (Apple Git-128)
Any help much appreciated!
The -b flag is only available in version 2.28 or later, you need to upgrade your Git.
On debian-based Linux systems such as Ubuntu, do the following:
sudo add-apt-repository -y ppa:git-core/ppa
sudo apt update
sudo apt install git -y
git 2.24 doesn't have option -b/--initial-branch. It was added in git 2.28. You need to upgrade to use the option.
Or, as #matt said, create a repo and then rename the branch:
git init repo
cd repo
git branch -m master slave
prior to git v2.28
git init # ①
git symbolic-ref HEAD refs/heads/main # ②
① After git init, the branch master does not actually exist. Branches get created only when they have at least one commit.
② This updates .git/HEAD to contain ref: refs/heads/main instead of ref: refs/heads/master. Alternatively, git checkout -b main.
git v2.28+
As #phd said, the -b/--initial-branch option was added in git v2.28. git 2.28 also introduces a config option to specify your preferred default branch:
git config --global init.defaultBranch main
Learn more about the new init.defaultBranch setting in GitHub's blog post.
In case you need to install the latest git version (in Ubuntu)
sudo add-apt-repository -y ppa:git-core/ppa
sudo apt-get update
sudo apt-get install git -y
Ref: https://gist.github.com/YuMS/6d7639480b17523f6f01490f285da509
This is happening due to the unavailability of a tool called Xcode Select, running xcode-select --install in your terminal fixes these issues with Git not working.

How to get back Homebrew to previous state?

I deleted some of .rb files(cassandra.rb,cassandra#2.1.rb and cassandra#2.2.rb) from folder /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/ from mac system.I want back those .rb files.I thought brew upgrade will give me back those deleted .rb files back.But they are still missing. Those .rb files are important for me to install packages.
brew install cassandra gives
Updating Homebrew...
Error: No available formula with the name "cassandra"
==> Searching for a previously deleted formula...
cassandra was deleted from homebrew/core in commit d20fe73:
cassandra: update 3.10_1 bottle.
To show the formula before removal run:
git -C "$(brew --repo homebrew/core)" show d20fe73^:Formula/cassandra.rb
If you still use this formula consider creating your own tap:
http://docs.brew.sh/How-to-Create-and-Maintain-a-Tap.html
Please I need solution "how to get back these .rb files?" or "any other alternative way to install cassandra".
Install directly from GitHub as mentioned here -
How to restore brew formula after I rm it
brew install https://github.com/Homebrew/homebrew-core/tree/master/Formula/cassandra.rb
Try this command to bring back all of deleted files.
Note: This command will revert all change in $(brew --repo homebrew/core)
cd $(brew --repo homebrew/core) && git reset --hard origin/master
Homebrew uses git internally, so use git commands to repair some problem.

Homebrew update error: Failure while executing: git pull -q origin refs/heads/master:refs/remotes/origin/master

When I try to run brew update, I see: error: The following untracked working tree files would be overwritten by merge:, then a large list of packages, and then I get the error:
Error: Failure while executing: git pull -q origin refs/heads/master:refs/remotes/origin/master.
What can I do about this?
Thanks!
Are you installed the beta of El Capitan?
Read this: https://github.com/Homebrew/homebrew/issues/40519

Error while trying to update brew package manager

I tried to update brew:
sudo brew update
But I got this error:
error: Your local changes to the following files would be overwritten by merge:
Listing a lot of files
Error: Failed while executing git pull http://github.com/mxcl/homebrew.git master
Any idea what is going wrong?
There was a bug in Homebrew that was fixed just a few days ago. To fix the bug you can run git reset --hard FETCH_HEAD inside your Homebrew installation. Since that won't fix files that are already seen as modified you can also run git checkout Library to replace your checkout with the latest files. (That wipes all edits so take appropriate measures with any you made.)
The accepted answer is correct but incomplete. If you are getting the error of
error: The following untracked working tree files would be overwritten by merge:
Then go to your terminal and run these commands
cd /usr/local
Then
git reset --hard FETCH_HEAD
Then
git checkout Library
That should get everything in order. Then run
brew update
Let me add: cd /usr/local/git
and then run git reset --hard FETCH_HEAD
go to your terminal and run these commands
cd /usr/local
sudo git reset --hard FETCH_HEAD
sudo git checkout Library
For those of you using OS X El Capitan, your problem may be System Integrity Protection.
If /usr/local exists already, run the following in Terminal:
sudo chown -R $(whoami):admin /usr/local
If /usr/local does not exist:
First, try to create /usr/local the normal way:
sudo mkdir /usr/local && sudo chflags norestricted /usr/local && sudo chown -R $(whoami):admin /usr/local
If you see permission issues instead try:
Reboot into Recovery mode (Hold Cmd+R on boot) & access the Terminal.
In that terminal run: csrutil disable
Reboot back into OS X
Open your Terminal application and execute the line from just above
Reboot back into Recovery Mode & access the Terminal again.
In that terminal execute: csrutil enable
Reboot back into OS X & you'll be able to write to /usr/local & install Homebrew.
Out of no reason (or at least no one I'd understand) the repository in /usr/local (which is the brew install!) lost its remote repository. So, neither a git reset nor a git pull and for sure no brew update would work.
How do you know that happened? Check /usr/local/.git/config whether there are some lines like the following:
[remote "origin"]
url = http://github.com/mxcl/homebrew.git
fetch = +refs/heads/*:refs/remotes/origin/*
If not do as follows:
cd /usr/local
git remote add origin http://github.com/mxcl/homebrew.git
git pull origin master

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