build(nix): allow platform specific

Author: spywhere

core/default.nix

@@ -21,6 +21,10 @@
   };
 
   config = {
+    nixpkgs.config = {
+      allowUnfree = true;
+      allowBroken = true;
+    };
     nix.settings.experimental-features = "nix-command flakes";
 
     environment.systemPackages = config.nixpkgs.add;
@@ -34,7 +38,7 @@
     homebrew = {
       enable = true;
       global.autoUpdate = true;
-      taps = config.brew.add.taps;
+      # taps = config.brew.add.taps;
       brews = config.brew.add.formula;
       casks = config.brew.add.cask;
 

core/package.nix

@@ -1,16 +1,19 @@
-{ lib, profile, config }: {
+{ lib, profile, config, isDarwin }: {
   mkPackage = name: {
     optional ? false,
     only ? [],
     except ? [],
+    platform ? [],
     config ? {},
   }:
   let
     inherit (lib) types;
+    systemPlatform = if isDarwin then "darwin" else "linux";
     isEmpty = list: builtins.length list == 0;
-    cfg = config.packages.${name} or { inherit optional only except; };
+    cfg = config.packages.${name} or { inherit optional only except platform; };
     shouldInstall = (
       !cfg.optional &&
+      (isEmpty cfg.platform || lib.elem systemPlatform cfg.platform) &&
       (isEmpty cfg.only || lib.elem profile cfg.only) &&
       !(lib.elem profile cfg.except)
     );
@@ -31,6 +34,11 @@
         default = except;
         description = "Excluded profiles.";
       };
+      platform = lib.mkOption {
+        type = types.listOf types.str;
+        default = platform;
+        description = "Allowed platforms (empty = all).";
+      };
     };
 
     config = lib.mkMerge [

core/profile.nix

@@ -16,7 +16,6 @@ rec {
   }:
   let
     isDarwin = lib.hasSuffix "-darwin" system;
-    homePath = if isDarwin then "/Users/${username}" else "/home/${username}";
     profile = name;
 
     modules = [
@@ -27,7 +26,7 @@ rec {
       {
         darwinConfigurations.${name} = darwin.lib.darwinSystem {
           inherit system;
-          specialArgs = { inherit profile username; };
+          specialArgs = { inherit profile username isDarwin; };
           modules = modules ++ [
             homebrew.darwinModules.nix-homebrew {
               inherit lib;

migrate.sh

@@ -2,12 +2,13 @@
 
 write_nix() {
   cat <<'EOF'
-{ config, lib, pkgs, profile, ...}:
+{ config, lib, pkgs, profile, isDarwin, ...}:
 let
   package = import ../core/package.nix {
     inherit lib;
     inherit profile;
     inherit config;
+    inherit isDarwin;
   };
   inherit (package) mkPackage;
 EOF
@@ -21,8 +22,11 @@ EOF
   if test -n "$4"; then
     printf '  except = [ %s ];\n' "$4"
   fi
+  if test -n "$5"; then
+    printf '  platform = [ %s ];\n' "$5"
+  fi
   printf '  config = {\n'
-  printf '    %s = [ %s ];\n' "$5" "$6"
+  printf '    %s = [ %s ];\n' "$6" "$7"
   printf '  };\n}\n'
 }
 
@@ -79,19 +83,40 @@ parse_profiles() {
   printf '%s' "$output"
 }
 
+parse_platforms() {
+  if test "$1" = "#"; then
+    shift
+  fi
+  if test "$1" = "platform"; then
+    shift
+  else
+    return
+  fi
+  output=""
+  while test -n "$1"; do
+    if test -n "$output"; then
+      output="$output "
+    fi
+    output="\"$1\""
+    shift
+  done
+  printf '%s' "$output"
+}
+
 migrate_to_nix() {
   source="$1"
   destination="$(printf '%s' "$source" | sed 's/\.sh/.nix/')"
   package="$2"
   manager="$3"
-  write_nix "$(basename "$1" | sed 's/\.sh$//' | normalize)" "$4" "$5" "$6" "$manager" "$package" >"$destination"
+  write_nix "$(basename "$1" | sed 's/\.sh$//' | normalize)" "$4" "$5" "$6" "$7" "$manager" "$package" >"$destination"
 }
 
 validate_package() {
   content="$(cat "$1")"
   optional=""
   only=""
   except=""
+  platforms=""
   if contains "$content" optional; then
     optional="1"
   fi
@@ -100,17 +125,20 @@ validate_package() {
     only="$(parse_profiles only $profiles)"
     except="$(parse_profiles except $profiles)"
   fi
+  if contains "$content" platform; then
+    platforms="$(parse_platforms $(read_match "$content" platform))"
+  fi
 
   if contains "$content" "use_nix"; then
-    migrate_to_nix "$1" "pkgs.$(read_match "$content" "use_nix" | item_at 3 | strip)" nixpkgs.add "$optional" "$only" "$except"
+    migrate_to_nix "$1" "pkgs.$(read_match "$content" "use_nix" | item_at 3 | strip)" nixpkgs.add "$optional" "$only" "$except" "$platforms"
   elif contains "$content" "use_brew formula"; then
-    migrate_to_nix "$1" "$(read_match "$content" "use_brew formula" | item_at 3 | normalize)" brew.add.formula "$optional" "$only" "$except"
+    migrate_to_nix "$1" "$(read_match "$content" "use_brew formula" | item_at 3 | normalize)" brew.add.formula "$optional" "$only" "$except" "$platforms"
   elif contains "$content" "use_brew cask"; then
-    migrate_to_nix "$1" "$(read_match "$content" "use_brew cask" | item_at 3 | normalize | xargs sh -c 'out="";for i in $*; do case "$1" in -*) continue;; *);; esac;if test -n "$out"; then out="$out ";fi;out="$out\"$i\""; done; printf "%s" "$out"' sh)" brew.add.cask "$optional" "$only" "$except"
+    migrate_to_nix "$1" "$(read_match "$content" "use_brew cask" | item_at 3 | normalize | xargs sh -c 'out="";for i in $*; do case "$1" in -*) continue;; *);; esac;if test -n "$out"; then out="$out ";fi;out="$out\"$i\""; done; printf "%s" "$out"' sh)" brew.add.cask "$optional" "$only" "$except" "$platforms"
   elif contains "$content" "use_brew_tap"; then
-    migrate_to_nix "$1" "$(read_match "$content" "use_brew_tap" | item_at 2 | normalize | xargs sh -c 'out="";for i in $*; do case "$1" in -*) continue;; *);; esac;if test -n "$out"; then out="$out ";fi;out="$out\"$i\""; done; printf "%s" "$out"' sh)" brew.add.tap "$optional" "$only" "$except"
+    migrate_to_nix "$1" "$(read_match "$content" "use_brew_tap" | item_at 2 | normalize | xargs sh -c 'out="";for i in $*; do case "$1" in -*) continue;; *);; esac;if test -n "$out"; then out="$out ";fi;out="$out\"$i\""; done; printf "%s" "$out"' sh)" brew.add.tap "$optional" "$only" "$except" "$platforms"
   # elif contains "$content" "has_executable"; then
-  #   migrate_to_nix "$1" "pkgs.$(read_match "$content" "has_executable" | item_at 2 | strip)" nixpkgs.add "$optional" "$only" "$except"
+  #   migrate_to_nix "$1" "pkgs.$(read_match "$content" "has_executable" | item_at 2 | strip)" nixpkgs.add "$optional" "$only" "$except" "$platforms"
   else
     printf ' skipped\n'
     return 1

packages/cryptomator.sh

@@ -16,5 +16,4 @@ profile -work
 has_app 'Cryptomator'
 require fuse-t
 
-# use_nix 'cryptomator'
 use_brew cask 'cryptomator'

packages/ghostty.sh

@@ -13,5 +13,6 @@ fi
 
 has_app 'Ghostty'
 
-# use_nix 'ghostty'
+# platform darwin
+# use_nix 'ghostty-bin'
 use_brew cask 'ghostty'

packages/proton-mail.sh

@@ -14,5 +14,4 @@ fi
 has_app 'Proton Mail'
 
 profile -work
-# use_nix 'protonmail-desktop'
 use_brew cask 'proton-mail'

packages/proton-pass.sh

@@ -14,5 +14,4 @@ fi
 has_app 'Proton Pass'
 
 profile -work
-# use_nix 'proton-pass'
 use_brew cask 'proton-pass'

packages/sysstat.sh

@@ -13,5 +13,6 @@ fi
 
 has_executable 'sysstat'
 
+# platform linux
 # use_nix 'sysstat'
 use_apt 'sysstat'