brew update fails on new Hombrew install on Lion

[lgw4]

Fresh Lion install on MacBook Air Mid-2011. Xcode 4.1 installed. Fresh Hombrew install. brew update fails.

Initialized empty Git repository in /usr/local/.git/
remote: Counting objects: 40936, done.
remote: Compressing objects: 100% (18381/18381), done.
remote: Total 40936 (delta 24860), reused 36201 (delta 21963)
Receiving objects: 100% (40936/40936), 5.55 MiB | 1.19 MiB/s, done.
Resolving deltas: 100% (24860/24860), done.
From http://github.com/mxcl/homebrew
 * branch            HEAD       -> FETCH_HEAD
error: unable to unlink old '.gitignore' (Permission denied)
error: unable to unlink old 'README.md' (Permission denied)
fatal: Could not reset index file to revision 'FETCH_HEAD'.
rm: .git: Permission denied
Error: Failure while executing: rm -rf .git 
total 16
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:44 .git/
-rw-r--r--  1 lgw4  wheel   97 Aug  9 15:41 .gitignore
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:41 Cellar/
drwxr-xr-x  6 lgw4  wheel  204 Aug  9 15:41 Library/
-rw-r--r--  1 lgw4  wheel  679 Aug  9 15:41 README.md
drwxr-xr-x  3 lgw4  wheel  102 Aug  9 15:44 bin/
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:41 etc/
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:41 include/
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:41 lib/
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:41 sbin/
drwxr-xr-x  3 lgw4  wheel  102 Aug  9 15:41 share/
drwxr-xr-x  2 lgw4  wheel   68 Aug  9 15:41 var/

Output of brew doctor:

Your OS X is ripe for brewing.
Any troubles you may be experiencing are likely purely psychosomatic.

Output of brew --env:

CC: /usr/bin/cc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CXX: /usr/bin/c++ => /usr/llvm-gcc-4.2/bin/llvm-g++-4.2
LD: /usr/bin/cc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CFLAGS: -O3 -w -pipe
CXXFLAGS: -O3 -w -pipe
MAKEFLAGS: -j4

[lgw4]

It appears the problem is that the Homebrew install script is making /usr/local owned by root:wheel and the contents thereof owned by $USER:wheel. When I read the script (and my Ruby skills aren't that great, so maybe I'm mistaken), it should make /usr/local owned by root:staff and the contents owned by $USER:staff. Under Snow Leopard, /usr/local didn't exist on OS install, and I'm assuming this is still the case in Lion. I don't think any applications I've installed created /usr/local. Any ideas why I'm seeing this behavior?

[erikdahlstrand]

I can confirm this issue on OS X Lion.

[kenziii]

It's also happened on my new Mac mini with Xcode 4.1.1 installed

Initialized empty Git repository in /usr/local/.git/
remote: Counting objects: 40936, done.
remote: Compressing objects: 100% (18440/18440), done.
remote: Total 40936 (delta 24873), reused 36271 (delta 21904)
Receiving objects: 100% (40936/40936), 5.58 MiB | 219 KiB/s, done.
Resolving deltas: 100% (24873/24873), done.
From http://github.com/mxcl/homebrew
- branch            HEAD       -> FETCH_HEAD
  error: unable to unlink old '.gitignore' (Permission denied)
  error: unable to unlink old 'README.md' (Permission denied)
  fatal: Could not reset index file to revision 'FETCH_HEAD'.
  rm: .git: Permission denied
  Error: Failure while executing: rm -rf .git

[imrefazekas]

Having the same issue after the Xcode 4.1.1 installed.
Owning the /usr/local/.git is not resolving the issue ...

[jacknagel]

See #6886

[mxcl]

Dupe and fixed.