From df7fdb5bc098ebf2220235b2337a1517267ef04d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Thu, 16 Mar 2023 12:27:42 +0100
Subject: Rework the whole NixOS and packages

This uses now primarilly overlays and also variable NIX_PROFILES to
chain-load shellrc from bashrc.d and zshrc.d.
---
 flake.lock |  12 +++---
 flake.nix  | 136 ++++++++++---------------------------------------------------
 nixos.nix  |  54 ++++++++++++++++++++++++
 pkgs.nix   |  61 +++++++++++++++++++++++++++
 4 files changed, 143 insertions(+), 120 deletions(-)
 create mode 100644 nixos.nix
 create mode 100644 pkgs.nix

diff --git a/flake.lock b/flake.lock
index e6da384..1b37211 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1653893745,
-        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
+        "lastModified": 1678901627,
+        "narHash": "sha256-U02riOqrKKzwjsxc/400XnElV+UtPUQWpANPlyazjH0=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "rev": "93a2b84fc4b70d9e089d029deacc3583435c2ed6",
         "type": "github"
       },
       "original": {
@@ -16,11 +16,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1654875595,
-        "narHash": "sha256-Vairke3ryPSFpgQdaYicPPhPWMGhtzm6V+1uF2Tefbk=",
+        "lastModified": 1678875422,
+        "narHash": "sha256-T3o6NcQPwXjxJMn2shz86Chch4ljXgZn746c2caGxd8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "3f909fb574d9b9d7294e544981c62a4a5e4599fc",
+        "rev": "126f49a01de5b7e35a43fd43f891ecf6d3a51459",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 35c0231..013277b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,120 +1,28 @@
 {
   description = "Cynerd's shell configuration";
 
-  outputs = { self, flake-utils, nixpkgs }: 
-  let
-
-    loadrc = dir: ''
-      for sh in ${dir}/*; do
-          [ -r "$sh" ] && . "$sh"
-      done
-      '';
-    commonrc = loadrc ./shellrc.d;
-    desktoprc = loadrc ./shellrc-desktop.d;
-    bashrc = loadrc ./bashrc.d;
-    zshrc = loadrc ./zshrc.d;
-
-    packages = pkgs: rec {
-      shellrc-generic = pkgs.stdenvNoCC.mkDerivation {
-        name = "shellrc-profile";
-        src = ./.;
-        installPhase = ''
-          mkdir -p "$out/etc/shellrc"
-          cp -r ./shellrc.d/. "$out/etc/shellrc/"
-        '';
-      };
-      shellrc-bashrc = pkgs.stdenvNoCC.mkDerivation {
-        name = "shellrc-profile-bash";
-        src = ./.;
-        shellrc = shellrc-generic;
-        installPhase = ''
-          mkdir -p "$out/etc/bashrc.d"
-          cp -r ./bashrc.d/. "$out/etc/bashrc.d/"
-          cat >"$out/etc/bashrc.d/shellrc" <<EOF
-          for sh in $shellrc/etc/shellrc/*; do
-            [ -r "\$sh" ] && . "\$sh"
-          done
-          EOF
-        '';
-      };
-      shellrc-zshrc = pkgs.stdenvNoCC.mkDerivation {
-        name = "shellrc-profile-zsh";
-        src = ./.;
-        shellrc = shellrc-generic;
-        installPhase = ''
-          mkdir -p "$out/etc/zshrc.d"
-          cp -r ./zshrc.d/. "$out/etc/zshrc.d/"
-          cat >"$out/etc/zshrc.d/shellrc" <<EOF
-          for sh in $shellrc/etc/shellrc/*; do
-            [ -r "\$sh" ] && . "\$sh"
-          done
-          EOF
-        '';
-      };
-      shellrc-completion = pkgs.stdenvNoCC.mkDerivation {
-        name = "shellrc-completion";
-        src = ./.;
-        nativeBuildInputs = [ pkgs.installShellFiles ];
-        installPhase = ''
-          for comp in bash-completion/*; do
-            installShellCompletion --bash --name "''${comp##*/}.bash" "$comp"
-          done
-          for comp in zsh-completion/*; do
-            installShellCompletion --zsh --name "''${comp##*/}" "$comp"
-          done
-        '';
-      };
-      shellrc = pkgs.symlinkJoin {
-        name = "shellrc";
-        paths = [ shellrc-bashrc shellrc-zshrc shellrc-completion ];
-      };
-      default = shellrc;
-    };
-
-  in {
-
-    overlays = {
-      shellrc = final: prev: packages prev;
-      default = self.overlays.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.";
-            };
-          };
+  outputs = {
+    self,
+    flake-utils,
+    nixpkgs,
+  }:
+    with flake-utils.lib;
+      {
+        overlays = {
+          shellrc = final: prev: import ./pkgs.nix {pkgs = prev;};
+          default = self.overlays.shellrc;
         };
-
-        config = mkIf config.programs.shellrc.enable {
-
-          environment.interactiveShellInit = commonrc + optionalString config.programs.shellrc.desktop desktoprc;
-
-          programs.bash.interactiveShellInit = bashrc;
-          programs.bash.promptInit = ""; # Disable default prompt as we have our own
-
-          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 ];
-
+        nixosModules = {
+          shellrc = import ./nixos.nix [self.overlays.shellrc];
+          default = self.nixosModules.shellrc;
         };
-      };
-      default = self.nixosModules.shellrc;
-    };
-
-  } // (flake-utils.lib.eachDefaultSystem (system: {
-    packages = packages nixpkgs.legacyPackages.${system};
-  }));
-
+      }
+      // eachDefaultSystem (system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+        selfPkgs = filterPackages system (flattenTree (import ./pkgs.nix {inherit pkgs;}));
+      in {
+        packages = selfPkgs // {default = selfPkgs.shellrc-bash;};
+        legacyPackages = pkgs.extend self.overlays.default;
+        formatter = pkgs.alejandra;
+      });
 }
diff --git a/nixos.nix b/nixos.nix
new file mode 100644
index 0000000..77b272c
--- /dev/null
+++ b/nixos.nix
@@ -0,0 +1,54 @@
+overlays: {
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cnf = config.programs.shellrc;
+  zshEnable = config.programs.zsh.enable;
+
+  # Source all files in an appropriate shell directory in every profile
+  shellInit = dir: ''
+    for p in $NIX_PROFILES; do
+      for file in $p/etc/${dir}/*; do
+        [ -f "$file" ] || continue
+        . "$file"
+      done
+    done
+  '';
+in {
+  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 = mkMerge [
+    {
+      nixpkgs.overlays = overlays;
+
+      programs.bash.interactiveShellInit = shellInit "bashrc.d";
+      programs.zsh.interactiveShellInit = mkIf zshEnable (shellInit "zshrc.d");
+    }
+    (mkIf cnf.enable {
+      environment.systemPackages =
+        [pkgs.shellrc-bash]
+        ++ optional cnf.desktop pkgs.shellrc-desktop
+        ++ optional zshEnable pkgs.shellrc-zsh;
+
+      # Disable default prompt as we have our own
+      programs.bash.promptInit = "";
+      programs.zsh.promptInit = ""; # Disable default prompt as we have our own
+    })
+  ];
+}
diff --git a/pkgs.nix b/pkgs.nix
new file mode 100644
index 0000000..f171859
--- /dev/null
+++ b/pkgs.nix
@@ -0,0 +1,61 @@
+{pkgs}: let
+  shellrcPkgs = {
+    shellrc-generic = pkgs.stdenvNoCC.mkDerivation {
+      name = "shellrc-generic";
+      src = ./.;
+      installPhase = ''
+        mkdir -p "$out/etc/shellrc.d"
+        cp -r ./shellrc.d/. "$out/etc/shellrc.d/"
+      '';
+    };
+    shellrc-desktop = pkgs.stdenvNoCC.mkDerivation {
+      name = "shellrc-desktop";
+      src = ./.;
+      installPhase = ''
+        mkdir -p "$out/etc/shellrc.d"
+        cp -r ./shellrc-desktop.d/. "$out/etc/shellrc.d/"
+      '';
+    };
+    shellrc-bash = pkgs.stdenvNoCC.mkDerivation {
+      name = "shellrc-bash";
+      src = ./.;
+      propagatedBuildInputs = [shellrcPkgs.shellrc-generic];
+      installPhase = ''
+        mkdir -p "$out/etc/bashrc.d"
+        cp -r ./bashrc.d/. "$out/etc/bashrc.d/"
+        cat >"$out/etc/bashrc.d/shellrc" <<EOF
+        # Load ShellRC files
+        for p in $NIX_PROFILES; do
+          for sh in $p/etc/shellrc.d/*; do
+            [ -r "\$sh" ] && . "\$sh"
+          done
+        done
+        EOF
+        for comp in bash-completion/*; do
+          installShellCompletion --bash --name "''${comp##*/}.bash" "$comp"
+        done
+      '';
+    };
+    shellrc-zsh = pkgs.stdenvNoCC.mkDerivation {
+      name = "shellrc-zsh";
+      src = ./.;
+      propagatedBuildInputs = [shellrcPkgs.shellrc-generic];
+      installPhase = ''
+        mkdir -p "$out/etc/zshrc.d"
+        cp -r ./zshrc.d/. "$out/etc/zshrc.d/"
+        cat >"$out/etc/zshrc.d/shellrc" <<EOF
+        # Load ShellRC files
+        for p in $NIX_PROFILES; do
+          for sh in $p/etc/shellrc.d/*; do
+            [ -r "\$sh" ] && . "\$sh"
+          done
+        done
+        EOF
+        for comp in zsh-completion/*; do
+          installShellCompletion --zsh --name "''${comp##*/}" "$comp"
+        done
+      '';
+    };
+  };
+in
+  shellrcPkgs
-- 
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