Homebrew.jl で git 周りのエラーに遭遇したときの対処法 ref: https://qiita.com/antimon2/items/b682d12db5166f4d49bd

file0.txt

julia> Pkg.build("Homebrew")
INFO: Building Homebrew
 : 《中略》
Error: git: /path/to/userhome/.julia/v0.6/Homebrew/deps/usr/Library/Taps/homebrew/homebrew-core/Formula/git.rb:190: syntax error, unexpected $undefined, expecting keyword_end
      \thelper = osxkeychain
       ^
==============================[ ERROR: Homebrew ]===============================

LoadError: ArgumentError: `brew info` failed for String["git"]!
while loading /path/to/userhome/.julia/v0.6/Homebrew/deps/build.jl, in expression starting on line 2

================================================================================

================================[ BUILD ERRORS ]================================

WARNING: Homebrew had build errors.

 - packages with build errors remain installed in /path/to/userhome/.julia/v0.6
 - build the package(s) and all dependencies with `Pkg.build("Homebrew")`
 - build a single package by running its `deps/build.jl` script

================================================================================

julia> 

file1.sh

$ cd ~/.julia/v0.6
$ rm -rf Homebrew

file2.txt

julia> Pkg.update()
INFO: Updating METADATA...
 : 《中略》
INFO: Installing Homebrew v0.5.9
INFO: Building Homebrew
INFO: Downloading brew...
 : 《後略》

julia>

file3.txt

julia> Pkg.build("Homebrew")
INFO: Building Homebrew
fatal: Unable to find remote helper for 'https'
fatal: Unable to find remote helper for 'https'
Error: Fetching /path/to/userhome/.julia/v0.6/Homebrew/deps/usr failed!
Fetching /path/to/userhome/.julia/v0.6/Homebrew/deps/usr/Library/Taps/homebrew/homebrew-core failed!
git: 'rebase' is not a git command. See 'git --help'.
git: 'rebase' is not a git command. See 'git --help'.
==============================[ ERROR: Homebrew ]===============================

LoadError: failed process: Process(`/path/to/userhome/.julia/v0.6/Homebrew/deps/usr/bin/brew update --force`, ProcessExited(1)) [1]
while loading /path/to/userhome/.julia/v0.6/Homebrew/deps/build.jl, in expression starting on line 2

================================================================================

================================[ BUILD ERRORS ]================================

WARNING: Homebrew had build errors.

 - packages with build errors remain installed in /path/to/userhome/.julia/v0.6
 - build the package(s) and all dependencies with `Pkg.build("Homebrew")`
 - build a single package by running its `deps/build.jl` script

================================================================================

julia>

file4.txt

shell> brew upgrade git
Updating Homebrew...
==> Auto-updated Homebrew!
 : 《中略》
==> Upgrading 1 outdated package, with result:
git 2.15.1
==> Upgrading git
==> Downloading https://homebrew.bintray.com/bottles/git-2.15.1.el_capitan.bottl
Already downloaded: /path/to/userhome/Library/Caches/Homebrew/git-2.15.1.el_capitan.bottle.tar.gz
==> Pouring git-2.15.1.el_capitan.bottle.tar.gz
==> Caveats
Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

zsh completions and functions have been installed to:
  /usr/local/share/zsh/site-functions

Emacs Lisp files have been installed to:
  /usr/local/share/emacs/site-lisp/git
==> Summary
🍺  /usr/local/Cellar/git/2.15.1: 1,488 files, 34.4MB

julia> Pkg.build("Homebrew")
INFO: Building Homebrew
Already up-to-date.

julia>