envsetup: add function to detect shell

Add a function to detect shell, other functions can now use this to
handle shell specific behavior.

Change-Id: I4aabc0068e836c5433053b144d163fb0ed49f752

1 files changed, 11 insertions, 2 deletions

diff --git a/envsetup.sh b/envsetup.sh
index c62a57f..35dc8e1 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -2457,16 +2457,25 @@ function make()
     mk_timer $(get_make_command) "$@"
 }
 
-if [ "x$SHELL" != "x/bin/bash" ]; then
+function __detect_shell() {
     case `ps -o command -p $$` in
         *bash*)
+            echo bash
             ;;
         *zsh*)
+            echo zsh
             ;;
         *)
-            echo "WARNING: Only bash and zsh are supported, use of other shell may lead to erroneous results"
+            echo unknown
+            return 1
             ;;
     esac
+    return
+}
+
+
+if ! __detect_shell > /dev/null; then
+    echo "WARNING: Only bash and zsh are supported, use of other shell may lead to erroneous results"
 fi
 
 # Execute the contents of any vendorsetup.sh files we can find.