makeWrapper: implement --inherit-argv0

For symmetry/interoperability with makeBinaryWrapper. Implemented as
--argv0 '$0'

pkgs/applications/editors/neovim/utils.nix

@@ -108,7 +108,7 @@ let
             hostprog_check_table);
         in
         [
-          "--argv0" "$0" "--add-flags" (lib.escapeShellArgs flags)
+          "--inherit-argv0" "--add-flags" (lib.escapeShellArgs flags)
         ] ++ lib.optionals withRuby [
           "--set" "GEM_HOME" "${rubyEnv}/${rubyEnv.ruby.gemPath}"
         ] ++ lib.optionals (binPath != "") [

pkgs/applications/networking/browsers/firefox/wrapper.nix

@@ -237,10 +237,7 @@ let
           parseMakeCWrapperCall() {
             shift # makeCWrapper
             oldExe=$1; shift
-            for arg do case $arg in
+            oldWrapperArgs=("$@")
-              --inherit-argv0) oldWrapperArgs+=(--argv0 '$0');; # makeWrapper doesn't understand --inherit-argv0
-              *) oldWrapperArgs+=("$arg");;
-            esac done
           }
           eval "parseMakeCWrapperCall ''${wrapperCmd//"${browser}"/"$out"}"
           rm "$executablePath"

pkgs/applications/video/mpv/wrapper.nix

@@ -32,7 +32,7 @@ let
     # All arguments besides the input and output binaries (${mpv}/bin/mpv and
     # $out/bin/mpv). These are used by the darwin specific makeWrapper call
     # used to wrap $out/Applications/mpv.app/Contents/MacOS/mpv as well.
-    mostMakeWrapperArgs = lib.strings.escapeShellArgs ([ "--argv0" "'$0'"
+    mostMakeWrapperArgs = lib.strings.escapeShellArgs ([ "--inherit-argv0"
       # These are always needed (TODO: Explain why)
       "--prefix" "LUA_CPATH" ";" "${mpv.luaEnv}/lib/lua/${mpv.lua.luaversion}/?.so"
       "--prefix" "LUA_PATH" ";" "${mpv.luaEnv}/share/lua/${mpv.lua.luaversion}/?.lua"
@@ -53,7 +53,7 @@ let
     )) ++ extraMakeWrapperArgs)
     ;
     umpvWrapperArgs = lib.strings.escapeShellArgs ([
-      "--argv0" "'$0'"
+      "--inherit-argv0"
       "--set" "MPV" "${placeholder "out"}/bin/mpv"
     ] ++ extraUmpvWrapperArgs)
     ;

pkgs/build-support/setup-hooks/make-binary-wrapper/make-binary-wrapper.sh

@@ -15,17 +15,17 @@ assertExecutable() {
 # makeWrapper EXECUTABLE OUT_PATH ARGS
 
 # ARGS:
-# --argv0       NAME    : set name of executed process to NAME
+# --argv0       NAME    : set the name of the executed process to NAME
-#                         (otherwise it’s called …-wrapped)
+#                         (if unset or empty, defaults to EXECUTABLE)
 # --inherit-argv0       : the executable inherits argv0 from the wrapper.
 #                         (use instead of --argv0 '$0')
-# --set         VAR VAL : add VAR with value VAL to the executable’s
+# --set         VAR VAL : add VAR with value VAL to the executable's environment
-#                         environment
 # --set-default VAR VAL : like --set, but only adds VAR if not already set in
 #                         the environment
 # --unset       VAR     : remove VAR from the environment
 # --chdir       DIR     : change working directory (use instead of --run "cd DIR")
 # --add-flags   FLAGS   : add FLAGS to invocation of executable
+# TODO(@ncfavier): --append-flags
 
 # --prefix          ENV SEP VAL   : suffix/prefix ENV with VAL, separated by SEP
 # --suffix
@@ -65,8 +65,6 @@ wrapProgramBinary() {
       hidden="${hidden}_"
     done
     mv "$prog" "$hidden"
-    # Silence warning about unexpanded $0:
-    # shellcheck disable=SC2016
     makeWrapper "$hidden" "$prog" --inherit-argv0 "${@:2}"
 }
 

pkgs/build-support/setup-hooks/make-wrapper.sh

@@ -11,16 +11,18 @@ assertExecutable() {
 # makeWrapper EXECUTABLE OUT_PATH ARGS
 
 # ARGS:
-# --argv0       NAME    : set name of executed process to NAME
+# --argv0       NAME    : set the name of the executed process to NAME
-#                         (otherwise it’s called …-wrapped)
+#                         (if unset or empty, defaults to EXECUTABLE)
-# --set         VAR VAL : add VAR with value VAL to the executable’s
+# --inherit-argv0       : the executable inherits argv0 from the wrapper.
-#                         environment
+#                         (use instead of --argv0 '$0')
+# --set         VAR VAL : add VAR with value VAL to the executable's environment
 # --set-default VAR VAL : like --set, but only adds VAR if not already set in
 #                         the environment
 # --unset       VAR     : remove VAR from the environment
 # --chdir       DIR     : change working directory (use instead of --run "cd DIR")
 # --run         COMMAND : run command before the executable
 # --add-flags   FLAGS   : add FLAGS to invocation of executable
+# TODO(@ncfavier): --append-flags
 
 # --prefix          ENV SEP VAL   : suffix/prefix ENV with VAL, separated by SEP
 # --suffix
@@ -166,6 +168,9 @@ makeShellWrapper() {
         elif [[ "$p" == "--argv0" ]]; then
             argv0="${params[$((n + 1))]}"
             n=$((n + 1))
+        elif [[ "$p" == "--inherit-argv0" ]]; then
+            # Whichever comes last of --argv0 and --inherit-argv0 wins
+            argv0='$0'
         else
             die "makeWrapper doesn't understand the arg $p"
         fi
@@ -206,7 +211,5 @@ wrapProgramShell() {
       hidden="${hidden}_"
     done
     mv "$prog" "$hidden"
-    # Silence warning about unexpanded $0:
+    makeWrapper "$hidden" "$prog" --inherit-argv0 "${@:2}"
-    # shellcheck disable=SC2016
-    makeWrapper "$hidden" "$prog" --argv0 '$0' "${@:2}"
 }