nix: simplify

shell.nix

@@ -8,28 +8,10 @@ let
 	rustPlatform	= callPackage ./nix/rustPlatform.nix {};
 	itm				= callPackage ./nix/itm.nix {inherit rustPlatform;};
 
-	runOpenOcd = writeShellScriptBin "run-openocd" ''
-		openocd \
-		-f openocd/openocd.cfg \
-		-c init &
-		sleep 1
-	'';
-
 	runOpenOcdBlock = writeShellScriptBin "run-openocd-block" ''
 		openocd -f openocd/openocd.cfg
 	'';
 
-	setGDBConfigFile = writeShellScriptBin "set-gdb-config-file" ''
-		if [[ $1 == "" ]]
-		then
-			sed -i "2s/.*/runner = \"gdb -q -x gdb_config\/openocd.gdb\"/" .cargo/config
-			echo "GDB config file: openocd.gdb"
-		else
-			sed -i "2s/.*/runner = \"gdb -q -x gdb_config\/$1.gdb\"/" .cargo/config
-			echo "GDB config file: $1.gdb"
-		fi
-	'';
-
 	openocdFlash = writeShellScriptBin "openocd-flash" ''
 	    openocd -f openocd/openocd.cfg -f openocd/$1.cfg
 	'';
@@ -40,7 +22,7 @@ let
 
 in
 	stdenv.mkDerivation {
-		name = "nix-shell";		
+		name = "Humpback-DDS";		
 		buildInputs = with rustPlatform.rust; [
 			(pkgs.python3.withPackages(ps: [ migen ]))
 			pkgs.yosys
@@ -52,9 +34,7 @@ in
 			rustc
 			cargo
 			itm
-			runOpenOcd
 			runOpenOcdBlock
-			setGDBConfigFile
 			openocdFlash
 			publishMqtt
 		];