From effca7d9c60495f7c5c21af637da4e0e2952f66e Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Fri, 25 Dec 2015 22:42:00 +0000
Subject: [PATCH] bin/brew: set more HOMEBREW_* env from Bash.

---
 Library/Homebrew/config.rb | 15 +++++----------
 bin/brew                   | 17 ++++++++++++++++-
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/Library/Homebrew/config.rb b/Library/Homebrew/config.rb
index 57cf19283d..692a43988c 100644
--- a/Library/Homebrew/config.rb
+++ b/Library/Homebrew/config.rb
@@ -31,21 +31,16 @@ unless defined? HOMEBREW_BREW_FILE
 end
 
 # Where we link under
-HOMEBREW_PREFIX = Pathname.new(HOMEBREW_BREW_FILE).dirname.parent
+HOMEBREW_PREFIX = Pathname.new(ENV["HOMEBREW_PREFIX"])
 
 # Where .git is found
-HOMEBREW_REPOSITORY = Pathname.new(HOMEBREW_BREW_FILE).realpath.dirname.parent
+HOMEBREW_REPOSITORY = Pathname.new(ENV["HOMEBREW_REPOSITORY"])
 
-HOMEBREW_LIBRARY = HOMEBREW_REPOSITORY/"Library"
+HOMEBREW_LIBRARY = Pathname.new(ENV["HOMEBREW_LIBRARY"])
 HOMEBREW_CONTRIB = HOMEBREW_REPOSITORY/"Library/Contributions"
 
-# Where we store built products; /usr/local/Cellar if it exists,
-# otherwise a Cellar relative to the Repository.
-HOMEBREW_CELLAR = if (HOMEBREW_PREFIX+"Cellar").exist?
-  HOMEBREW_PREFIX+"Cellar"
-else
-  HOMEBREW_REPOSITORY+"Cellar"
-end
+# Where we store built products
+HOMEBREW_CELLAR = Pathname.new(ENV["HOMEBREW_CELLAR"])
 
 HOMEBREW_LOGS = Pathname.new(ENV["HOMEBREW_LOGS"] || "~/Library/Logs/Homebrew/").expand_path
 
diff --git a/bin/brew b/bin/brew
index 0503abc090..30d4f9c49b 100755
--- a/bin/brew
+++ b/bin/brew
@@ -21,7 +21,18 @@ then
                          chdir "$BREW_SYMLINK_DIRECTORY" && pwd -P)"
 fi
 
-BREW_LIBRARY_DIRECTORY="$(chdir "$BREW_FILE_DIRECTORY"/../Library && pwd -P)"
+HOMEBREW_PREFIX="$(chdir "$(dirname "$(dirname "$HOMEBREW_BREW_FILE")")" && pwd -P)"
+HOMEBREW_REPOSITORY="$(chdir "$BREW_FILE_DIRECTORY"/../ && pwd -P)"
+HOMEBREW_LIBRARY="$(chdir "$BREW_FILE_DIRECTORY"/../Library && pwd -P)"
+
+# Where we store built products; /usr/local/Cellar if it exists,
+# otherwise a Cellar relative to the Repository.
+if [ -d "$HOMEBREW_PREFIX/Cellar" ]
+then
+  HOMEBREW_CELLAR="$HOMEBREW_PREFIX/Cellar"
+else
+  HOMEBREW_CELLAR="$HOMEBREW_REPOSITORY/Cellar"
+fi
 
 # Users may have these set, pointing the system Ruby
 # at non-system gem paths
@@ -45,5 +56,9 @@ fi
 
 export HOMEBREW_BREW_FILE
 export HOMEBREW_RUBY_PATH
+export HOMEBREW_PREFIX
+export HOMEBREW_REPOSITORY
+export HOMEBREW_LIBRARY
+export HOMEBREW_CELLAR
 
 exec "$HOMEBREW_RUBY_PATH" -W0 "$BREW_LIBRARY_DIRECTORY/brew.rb" "$@"