From f6b661ebf0cbd9ecae64eb1f757dc1b4073b1d73 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Sat, 11 Jun 2022 22:05:17 +0200
Subject: Allow using in nix develop and use prompt to signal it

---
 bashrc.d/prompt |  4 ++-
 flake.lock      | 21 +++++++++++--
 flake.nix       | 98 +++++++++++++++++++++++++++++++--------------------------
 3 files changed, 75 insertions(+), 48 deletions(-)

diff --git a/bashrc.d/prompt b/bashrc.d/prompt
index dee3e53..6632037 100644
--- a/bashrc.d/prompt
+++ b/bashrc.d/prompt
@@ -1,8 +1,10 @@
 # vim: ft=sh
 
 PS1='$(
-if [ `id -u` -eq "0" ]; then
+if [ "$(id -u)" -eq "0" ]; then
 	echo -n "\[\e[1;31m\]\u@\h:\[\e[1;34m\]\W\[\e[1;31m\]\$\[\e[0m\] "
+elif [ "${_SHELLRC:-}" = "develop" ]; then
+	echo -n "\[\e[1;33m\]\u@\h:\[\e[1;34m\]\W\[\e[1;33m\]\$\[\e[0m\] "
 else
 	echo -n "\[\e[1;32m\]\u@\h:\[\e[1;34m\]\W\[\e[1;32m\]\$\[\e[0m\] "
 fi)'
diff --git a/flake.lock b/flake.lock
index 6ad3dfd..e6da384 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,26 @@
 {
   "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1653893745,
+        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-utils",
+        "type": "indirect"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1648219316,
-        "narHash": "sha256-Ctij+dOi0ZZIfX5eMhgwugfvB+WZSrvVNAyAuANOsnQ=",
+        "lastModified": 1654875595,
+        "narHash": "sha256-Vairke3ryPSFpgQdaYicPPhPWMGhtzm6V+1uF2Tefbk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "30d3d79b7d3607d56546dd2a6b49e156ba0ec634",
+        "rev": "3f909fb574d9b9d7294e544981c62a4a5e4599fc",
         "type": "github"
       },
       "original": {
@@ -16,6 +30,7 @@
     },
     "root": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
     }
diff --git a/flake.nix b/flake.nix
index 64040fe..83c6d6a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,11 +1,20 @@
 {
   description = "Cynerd's shell configuration";
 
-  outputs = { self, nixpkgs }: {
+  outputs = { self, flake-utils, nixpkgs }: 
+  let
 
-    nixosModule = { config, lib, pkgs, ... }:
-    with lib;
-    let
+    loadrc = dir: ''
+      for sh in ${dir}/*; do
+          [ -r "$sh" ] && . "$sh"
+      done
+      '';
+    commonrc = loadrc ./shellrc.d;
+    desktoprc = loadrc ./shellrc-desktop.d;
+    bashrc = loadrc ./bashrc.d;
+    zshrc = loadrc ./zshrc.d;
+
+    packages = pkgs: rec {
       shellrc-completion = pkgs.stdenv.mkDerivation rec {
         name = "shellrc-completion";
         src = ./.;
@@ -18,56 +27,57 @@
             installShellCompletion --zsh --name "$${comp##*/}" "$comp"
           done
         '';
+        shellHook = commonrc + bashrc + ''
+          export _SHELLRC=develop
+          '';
       };
-    in {
+      default = shellrc-completion;
+    };
 
-      options = {
-        programs.shellrc = {
-          enable = mkOption {
-            type = types.bool;
-            default = true;
-            description = "If shellrc should be enabled.";
-          };
-          desktop = mkOption {
-            type = types.bool;
-            default = false;
-            description = "If shellrc's desktop specific files should be used.";
+  in {
+
+    overlays = {
+      shellrc = final: prev: packages prev;
+      default = self.overlay.shellrc;
+    };
+
+    nixosModules = {
+      shellrc = { config, lib, pkgs, ... }: with lib; {
+        options = {
+          programs.shellrc = {
+            enable = mkOption {
+              type = types.bool;
+              default = true;
+              description = "If shellrc should be enabled.";
+            };
+            desktop = mkOption {
+              type = types.bool;
+              default = false;
+              description = "If shellrc's desktop specific files should be used.";
+            };
           };
         };
-      };
 
-      config = mkIf config.programs.shellrc.enable {
-        environment.interactiveShellInit = ''
-            for sh in ${./shellrc.d}/*; do
-                [ -r "$sh" ] && . "$sh"
-            done
-          '' + optionalString config.programs.shellrc.desktop ''
-            for sh in ${./shellrc-desktop.d}/*; do
-                [ -r "$sh" ] && . "$sh"
-            done
-          '';
+        config = mkIf config.programs.shellrc.enable {
 
-        programs.bash.interactiveShellInit = ''
-            for sh in ${./bashrc.d}/*; do
-                [ -r "$sh" ] && . "$sh"
-            done
-          '';
-        programs.bash.promptInit = ""; # Disable default prompt as we have our own
+          environment.interactiveShellInit = commonrc + optionalString config.programs.shellrc.desktop desktoprc;
 
-        programs.zsh.interactiveShellInit = mkIf config.programs.zsh.enable ''
-            for sh in ${./zshrc.d}/*; do
-                [ -r "$sh" ] && . "$sh"
-            done
-          '';
-        programs.zsh.promptInit = ""; # Disable default prompt as we have our own
+          programs.bash.interactiveShellInit = bashrc;
+          programs.bash.promptInit = ""; # Disable default prompt as we have our own
 
-        environment.systemPackages = [
-          shellrc-completion
-        ];
+          programs.zsh.interactiveShellInit = mkIf config.programs.zsh.enable zshrc;
+          programs.zsh.promptInit = ""; # Disable default prompt as we have our own
 
-      };
+          nixpkgs.overlays = [ self.overlays.shellrc ];
+          environment.systemPackages = [ pkgs.shellrc-completion ];
 
+        };
+      };
+      default = self.nixosModules.shellrc;
     };
 
-  };
+  } // (flake-utils.lib.eachDefaultSystem (system: {
+    packages = packages nixpkgs.legacyPackages.${system};
+  }));
+
 }
-- 
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