Why devtools::install_github("rstats-db/RPostgres") fails on Mac?

[andreskull]

> devtools::install_github("rstats-db/RPostgres")
Downloading github repo rstats-db/RPostgres@master
Installing RPostgres
'/Library/Frameworks/R.framework/Resources/bin/R' --vanilla CMD INSTALL  \
  '/private/var/folders/gz/ys2sqm9j76x30y312y_15blm0000gn/T/RtmpQt0iXi/devtoolsb91d5912beaf/rstats-db-RPostgres-524876f'  \
  --library='/Library/Frameworks/R.framework/Versions/3.1/Resources/library'  \
  --install-tests 

* installing *source* package ‘RPostgres’ ...
/usr/local/bin/brew: /usr/local/Library/brew.rb: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby: bad interpreter: No such file or directory
/usr/local/bin/brew: line 23: /usr/local/Library/brew.rb: Undefined error: 0
Brewing libpq in ...
./configure: line 35: /bin/brew: No such file or directory
File /Cellar/postgresql/*/include/libpq-fe.h not found.
Homebrew of libgit2 failed :(
ERROR: configuration failed for package ‘RPostgres’
* removing ‘/Library/Frameworks/R.framework/Versions/3.1/Resources/library/RPostgres’
Error: Command failed (1)

[jeroen]

Which version of osx is this? Can you give me the output of:

which brew
brew --version

[andreskull]

osx 10.10.2

which brew
/usr/local/bin/brew
brew --version
/usr/local/bin/brew: /usr/local/Library/brew.rb: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby: bad interpreter: No such file or directory
/usr/local/bin/brew: line 23: /usr/local/Library/brew.rb: Undefined error: 0

[jeroen]

So it looks like there is a problem with your brew installation that is unrelated to RPostgres.

[andreskull]

Exactly!
http://coolestguidesontheplanet.com/installing-homebrew-os-x-yosemite-10-10-package-manager-unix-apps/

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