Add an option ‘environment.interactiveShellInit’

This is like ‘environment.shellInit’, but only for interactive shells.

modules/programs/bash/bash.nix

@@ -7,7 +7,9 @@ with pkgs.lib;
 
 let
 
-  initBashCompletion = optionalString config.environment.enableBashCompletion ''
+  cfg = config.environment;
+
+  initBashCompletion = optionalString cfg.enableBashCompletion ''
     # Check whether we're running a version of Bash that has support for
     # programmable completion. If we do, enable all modules installed in
     # the system (and user profile).
@@ -26,7 +28,7 @@ let
   '';
 
   shellAliases = concatStringsSep "\n" (
-    mapAttrsFlatten (k: v: "alias ${k}='${v}'") config.environment.shellAliases
+    mapAttrsFlatten (k: v: "alias ${k}='${v}'") cfg.shellAliases
   );
 
   options = {
@@ -41,24 +43,33 @@ let
           PS1="\[\033]2;\h:\u:\w\007\]$PS1"
         fi
       '';
-      description = "
-        Script used to initialized shell prompt.
-      ";
+      description = ''
+        Shell script code used to initialise the shell prompt.
+      '';
       type = with pkgs.lib.types; string;
     };
 
     environment.shellInit = mkOption {
       default = "";
       example = ''export PATH=/godi/bin/:$PATH'';
-      description = "
-        Script used to initialized user shell environments.
-      ";
+      description = ''
+        Shell script code called during login shell initialisation.
+      '';
+      type = with pkgs.lib.types; string;
+    };
+
+    environment.interactiveShellInit = mkOption {
+      default = "";
+      example = ''export PATH=/godi/bin/:$PATH'';
+      description = ''
+        Shell script code called during interactive shell initialisation.
+      '';
       type = with pkgs.lib.types; string;
     };
 
     environment.enableBashCompletion = mkOption {
       default = false;
-      description = "Enable bash-completion for all interactive shells.";
+      description = "Enable Bash completion for all interactive shells.";
       type = with pkgs.lib.types; bool;
     };
 
@@ -86,7 +97,7 @@ in
         source = pkgs.substituteAll {
           src = ./profile.sh;
           wrapperDir = config.security.wrapperDir;
-          shellInit = config.environment.shellInit;
+          inherit (cfg) shellInit;
         };
         target = "profile";
       }
@@ -96,8 +107,7 @@ in
         # configured properly.
         source = pkgs.substituteAll {
           src = ./bashrc.sh;
-          inherit (config.environment) promptInit;
-          inherit initBashCompletion shellAliases;
+          inherit (cfg) interactiveShellInit;
         };
         target = "bashrc";
       }
@@ -115,6 +125,16 @@ in
       which = "type -P";
     };
 
+  environment.interactiveShellInit =
+    ''
+      # Check the window size after every command.
+      shopt -s checkwinsize
+
+      ${cfg.promptInit}
+      ${initBashCompletion}
+      ${shellAliases}
+    '';
+
   system.build.binsh = pkgs.bashInteractive;
 
   system.activationScripts.binsh = stringAfter [ "stdio" ]
@@ -122,9 +142,9 @@ in
       # Create the required /bin/sh symlink; otherwise lots of things
       # (notably the system() function) won't work.
       mkdir -m 0755 -p /bin
-      ln -sfn "${config.environment.binsh}" /bin/.sh.tmp
+      ln -sfn "${cfg.binsh}" /bin/.sh.tmp
       mv /bin/.sh.tmp /bin/sh # atomically replace /bin/sh
     '';
 
-  environment.pathsToLink = optional config.environment.enableBashCompletion "/etc/bash_completion.d";
+  environment.pathsToLink = optional cfg.enableBashCompletion "/etc/bash_completion.d";
 }

modules/programs/bash/bashrc.sh

@@ -16,9 +16,4 @@ fi
 # We are not always an interactive shell.
 if [ -z "$PS1" ]; then return; fi
 
-# Check the window size after every command.
-shopt -s checkwinsize
-
-@promptInit@
-@initBashCompletion@
-@shellAliases@
+@interactiveShellInit@