revert env.sh and use pipe redirect

Signed-off-by: luarss <[email protected]>

Author: luarss

env.sh

@@ -24,7 +24,3 @@ if [[ "$OSTYPE" == "darwin"* ]]; then
   export CMAKE_PREFIX_PATH="$(brew --prefix or-tools)"
 fi
 
-# For Makefile environment
-if [ -n "\$MAKEFILE_ENV" ]; then
-    PS1='\[\e[32m\]Makefile Environment \[\e[0m\] \w $ '
-fi

flow/Makefile

@@ -1050,7 +1050,7 @@ yosys:
 # Drop into a bash shell with all environment variables, useful for debugging
 .PHONY: bash
 bash:
-	export MAKEFILE_ENV=1; bash --init-file $(FLOW_HOME)/../env.sh
+	bash --init-file <(echo "PS1='\[\e[32m\]Makefile Environment \[\e[0m\] \w $ '")
 
 .PHONY: all_defs
 all_defs : $(foreach file,$(RESULTS_ODB),$(file).def)