bin/brew: set more HOMEBREW_* env from Bash.

1 files changed, 16 insertions, 1 deletions

diff --git a/bin/brew b/bin/brew
index 0503abc09..30d4f9c49 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" "$@"