From b8fee7fe4d727a624943212ae21113a00e1e1e2f Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@gmail.com>
Date: Tue, 23 May 2017 18:34:16 -0700
Subject: [PATCH 1/3] vendor-install: check -x on output of which

This works around older versions of `which`, which return a
string on failure.
---
 Library/Homebrew/cmd/vendor-install.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/cmd/vendor-install.sh b/Library/Homebrew/cmd/vendor-install.sh
index 8f08e49fb0..9ab004ee87 100644
--- a/Library/Homebrew/cmd/vendor-install.sh
+++ b/Library/Homebrew/cmd/vendor-install.sh
@@ -76,10 +76,10 @@ fetch() {
     trap - SIGINT
   fi
 
-  if [[ -n "$(which shasum)" ]]
+  if [[ -x "$(which shasum)" ]]
   then
     sha="$(shasum -a 256 "$CACHED_LOCATION" | cut -d' ' -f1)"
-  elif [[ -n "$(which sha256sum)" ]]
+  elif [[ -x "$(which sha256sum)" ]]
   then
     sha="$(sha256sum "$CACHED_LOCATION" | cut -d' ' -f1)"
   else

From 6453c81dacc66ed892168351335482f83b087c34 Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@gmail.com>
Date: Thu, 11 May 2017 08:58:40 -0700
Subject: [PATCH 2/3] vendor-install: fix array syntax for old bash

---
 Library/Homebrew/cmd/vendor-install.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/cmd/vendor-install.sh b/Library/Homebrew/cmd/vendor-install.sh
index 9ab004ee87..46f0c72f9d 100644
--- a/Library/Homebrew/cmd/vendor-install.sh
+++ b/Library/Homebrew/cmd/vendor-install.sh
@@ -39,10 +39,10 @@ fetch() {
 
   if [[ -n "$HOMEBREW_QUIET" ]]
   then
-    curl_args+=(--silent)
+    curl_args[${#curl_args[*]}]="--silent"
   elif [[ -z "$HOMEBREW_VERBOSE" ]]
   then
-    curl_args+=(--progress-bar)
+    curl_args[${#curl_args[*]}]="--progress-bar"
   fi
 
   temporary_path="$CACHED_LOCATION.incomplete"

From 7c7a0fc720f3d7be019b15343709fe4f45dafeff Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@gmail.com>
Date: Wed, 10 May 2017 23:31:31 -0700
Subject: [PATCH 3/3] brew.sh: don't call xcode-select if it doesn't exist

---
 Library/Homebrew/brew.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/brew.sh b/Library/Homebrew/brew.sh
index 02ce5e1c15..b762800993 100644
--- a/Library/Homebrew/brew.sh
+++ b/Library/Homebrew/brew.sh
@@ -145,7 +145,7 @@ export HOMEBREW_MACOS_VERSION
 export HOMEBREW_USER_AGENT
 export HOMEBREW_USER_AGENT_CURL
 
-if [[ -n "$HOMEBREW_MACOS" ]]
+if [[ -n "$HOMEBREW_MACOS" && -x "/usr/bin/xcode-select" ]]
 then
   XCODE_SELECT_PATH=$('/usr/bin/xcode-select' --print-path 2>/dev/null)
   if [[ "$XCODE_SELECT_PATH" = "/" ]]