Merge remote-tracking branch 'cd/master'

Makefile

@@ -48,6 +48,14 @@ $(if $(target_user),,$(error unbound variable: target_user))
 $(if $(target_port),,$(error unbound variable: target_port))
 $(if $(target_path),,$(error unbound variable: target_path))
 
+build = \
+	nix-build \
+		--no-out-link \
+		--show-trace \
+		-I nixos-config=$(nixos-config) \
+		-I stockholm=$(stockholm) \
+		-E "let build = import <stockholm>; in $(1)"
+
 evaluate = \
 	nix-instantiate \
 		--eval \
@@ -74,6 +82,10 @@ deploy:
 		env STOCKHOLM_VERSION="$$STOCKHOLM_VERSION" \
 			nixos-rebuild switch --show-trace -I $(target_path)
 
+# usage: make build.pkgs.get
+build build.:;@$(call build,$${expr-eval})
+build.%:;@$(call build,$@)
+
 # usage: make LOGNAME=shared system=wolf eval.config.krebs.build.host.name
 eval eval.:;@$(call evaluate,$${expr-eval})
 eval.%:;@$(call evaluate,$@)

krebs/3modules/setuid.nix

@@ -20,6 +20,10 @@ let
           type = types.filename;
           default = config._module.args.name;
         };
+        envp = mkOption {
+          type = types.attrsOf types.str;
+          default = {};
+        };
         filename = mkOption {
           type = mkOptionType {
             # TODO unyuck string and merge with toC
@@ -57,7 +61,7 @@ let
       };
       config.activate = let
         src = pkgs.execve config.name {
-          inherit (config) filename;
+          inherit (config) envp filename;
         };
         dst = "${wrapperDir}/${config.name}";
       in ''

krebs/4lib/types.nix

@@ -286,6 +286,19 @@ types // rec {
     };
   };
 
+  haskell.conid = mkOptionType {
+    name = "Haskell constructor identifier";
+    check = x:
+      isString x && match "[[:upper:]][[:lower:]_[:upper:]0-9']*" x != null;
+    merge = mergeOneOption;
+  };
+
+  haskell.modid = mkOptionType {
+    name = "Haskell module identifier";
+    check = x: isString x && all haskell.conid.check (splitString "." x);
+    merge = mergeOneOption;
+  };
+
   # RFC952, B. Lexical grammar, <hname>
   hostname = mkOptionType {
     name = "hostname";

krebs/5pkgs/builders.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ config, pkgs, ... }:
 with config.krebs.lib;
 rec {
   execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let
@@ -28,6 +28,21 @@ rec {
 
   execveBin = name: cfg: execve name (cfg // { destination = "/bin/${name}"; });
 
+  writeBash = name: text: pkgs.writeScript name ''
+    #! ${pkgs.bash}/bin/bash
+    ${text}
+  '';
+
+  writeBashBin = name: text: pkgs.writeTextFile {
+    executable = true;
+    destination = "/bin/${name}";
+    name = name;
+    text = ''
+      #! ${pkgs.bash}/bin/bash
+      ${text}
+    '';
+  };
+
   writeC = name: { destination ? "" }: src: pkgs.runCommand name {} ''
     PATH=${makeBinPath (with pkgs; [
       binutils
@@ -66,50 +81,112 @@ rec {
     mv "$textPath" $out
   '';
 
-  writeHaskellBin =
+  writeHaskell =
     k:
     let
       k' = parseDrvName k;
       name = k'.name;
       version = if k'.version != "" then k'.version else "0";
     in
-    { build-depends ? ["base"] ++ depends
-    , depends ? []
+    { base-depends ? ["base"]
+    , executables ? {}
     , ghc-options ? ["-Wall" "-O3" "-threaded" "-rtsopts"]
     , haskellPackages ? pkgs.haskellPackages
+    , library ? null
     , license ? "WTFPL"
     }:
-    main-text:
     let
+      isExecutable = executables != {};
+      isLibrary = library != null;
+
       cabal-file = pkgs.writeText "${name}-${version}.cabal" ''
         build-type: Simple
         cabal-version: >= 1.2
         name: ${name}
         version: ${version}
+        ${concatStringsSep "\n" (mapAttrsToList exe-section executables)}
+        ${optionalString isLibrary (lib-section library)}
+      '';
 
-        executable ${name}
+      exe-install =
+        exe-name:
+        { file ? pkgs.writeText "${name}-${exe-name}.hs" text
+        , relpath ? "${exe-name}.hs"
+        , text
+        , ... }:
+        if types.filename.check exe-name
+          then "install -D ${file} $out/${relpath}"
+          else throw "argument ‘exe-name’ is not a ${types.filename.name}";
+
+      exe-section =
+        exe-name:
+        { build-depends ? base-depends ++ extra-depends
+        , extra-depends ? []
+        , file ? pkgs.writeText "${name}-${exe-name}.hs" text
+        , relpath ? "${exe-name}.hs"
+        , text
+        , ... }: ''
+          executable ${exe-name}
             build-depends: ${concatStringsSep "," build-depends}
             ghc-options: ${toString ghc-options}
-          main-is: ${main-file.name}
+            main-is: ${relpath}
         '';
-      main-file = pkgs.writeText "${name}-${version}.hs" main-text;
+
+      get-depends =
+        { build-depends ? base-depends ++ extra-depends
+        , extra-depends ? []
+        , ...
+        }:
+        build-depends;
+
+      lib-install =
+        { exposed-modules
+        , ... }:
+        concatStringsSep "\n" (mapAttrsToList mod-install exposed-modules);
+
+      lib-section =
+        { build-depends ? base-depends ++ extra-depends
+        , extra-depends ? []
+        , exposed-modules
+        , ... }: ''
+          library
+            build-depends: ${concatStringsSep "," build-depends}
+            ghc-options: ${toString ghc-options}
+            exposed-modules: ${concatStringsSep "," (attrNames exposed-modules)}
+        '';
+
+      mod-install =
+        mod-name:
+        { file ? pkgs.writeText "${name}-${mod-name}.hs" text
+        , relpath ? "${replaceStrings ["."] ["/"] mod-name}.hs"
+        , text
+        , ... }:
+        if types.haskell.modid.check mod-name
+          then "install -D ${file} $out/${relpath}"
+          else throw "argument ‘mod-name’ is not a ${types.haskell.modid.name}";
     in
-      haskellPackages.mkDerivation rec {
-        inherit license version;
-        executableHaskellDepends = attrVals build-depends haskellPackages;
-        isExecutable = true;
-        isLibrary = false;
+      haskellPackages.mkDerivation {
+        inherit isExecutable isLibrary license version;
+        executableHaskellDepends =
+          attrVals
+            (concatMap get-depends (attrValues executables))
+            haskellPackages;
+        libraryHaskellDepends =
+          attrVals
+            (optionals isLibrary (get-depends library))
+            haskellPackages;
         pname = name;
         src = pkgs.runCommand "${name}-${version}-src" {} ''
           install -D ${cabal-file} $out/${cabal-file.name}
-          install -D ${main-file}  $out/${main-file.name}
+          ${optionalString isLibrary (lib-install library)}
+          ${concatStringsSep "\n" (mapAttrsToList exe-install executables)}
         '';
       };
 
   writeNixFromCabal =
     trace (toString [
       "The function `writeNixFromCabal` has been deprecated in favour of"
-      "`writeHaskellBin'."
+      "`writeHaskell`."
     ])
     (name: path: pkgs.runCommand name {} ''
       ${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out

tv/2configs/xserver/default.nix

@@ -74,8 +74,8 @@ in {
     };
     serviceConfig = {
       SyslogIdentifier = "xmonad";
-      ExecStart = "${pkgs.xmonad-tv}/bin/xmonad-tv";
-      ExecStop = "${pkgs.xmonad-tv}/bin/xmonad-tv --shutdown";
+      ExecStart = "${pkgs.xmonad-tv}/bin/xmonad";
+      ExecStop = "${pkgs.xmonad-tv}/bin/xmonad --shutdown";
       User = user.name;
       WorkingDirectory = user.home;
     };

tv/5pkgs/xmonad-tv.nix

@@ -1,6 +1,7 @@
 { pkgs, ... }:
-pkgs.writeHaskellBin "xmonad-tv" {
-  depends = [
+pkgs.writeHaskell "xmonad-tv" {
+  executables.xmonad = {
+    extra-depends = [
       "containers"
       "unix"
       "X11"
@@ -8,7 +9,7 @@ pkgs.writeHaskellBin "xmonad-tv" {
       "xmonad-contrib"
       "xmonad-stockholm"
     ];
-} ''
+    text = ''
 {-# LANGUAGE DeriveDataTypeable #-} -- for XS
 {-# LANGUAGE FlexibleContexts #-} -- for xmonad'
 {-# LANGUAGE LambdaCase #-}
@@ -299,4 +300,6 @@ wGSConfig = def
 allWorkspaceNames :: W.StackSet i l a sid sd -> X [i]
 allWorkspaceNames ws =
     return $ map W.tag (W.hidden ws) ++ [W.tag $ W.workspace $ W.current ws]
-''
+  '';
+  };
+}