Merge remote-tracking branch 'prism/master'

9 files changed, 336 insertions, 32 deletions

diff --git a/Makefile b/Makefile
index a74e3a877..6e09559b6 100644
--- a/Makefile
+++ b/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.%:;@$(call evaluate,$@)
diff --git a/krebs/3modules/setuid.nix b/krebs/3modules/setuid.nix
index cfb8382e8..65a4abe1c 100644
--- a/krebs/3modules/setuid.nix
+++ b/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 ''
diff --git a/krebs/4lib/types.nix b/krebs/4lib/types.nix
index 56d1d55c3..66191d0b3 100644
--- a/krebs/4lib/types.nix
+++ b/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";
diff --git a/krebs/5pkgs/builders.nix b/krebs/5pkgs/builders.nix
index 39b91d144..f60bbc9d0 100644
--- a/krebs/5pkgs/builders.nix
+++ b/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}
-
-        executable ${name}
-          build-depends: ${concatStringsSep "," build-depends}
-          ghc-options: ${toString ghc-options}
-          main-is: ${main-file.name}
+        ${concatStringsSep "\n" (mapAttrsToList exe-section executables)}
+        ${optionalString isLibrary (lib-section library)}
       '';
-      main-file = pkgs.writeText "${name}-${version}.hs" main-text;
+
+      exe-install =
+        exe-name:
+        { file ? pkgs.writeText "${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: ${relpath}
+        '';
+
+      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} > $out
diff --git a/tv/1systems/xu.nix b/tv/1systems/xu.nix
index 96a0545a7..a79ae498b 100644
--- a/tv/1systems/xu.nix
+++ b/tv/1systems/xu.nix
@@ -60,6 +60,7 @@ with config.krebs.lib;
         nmap
         p7zip
         pass
+        q
         qrencode
         texLive
         tmux
diff --git a/tv/2configs/xserver/default.nix b/tv/2configs/xserver/default.nix
index 965c3bbe1..c41c0a81e 100644
--- a/tv/2configs/xserver/default.nix
+++ b/tv/2configs/xserver/default.nix
@@ -74,8 +74,8 @@ in {
     };
     serviceConfig = {
       SyslogIdentifier = "xmonad";
-      ExecStart = "${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;
     };
diff --git a/tv/5pkgs/default.nix b/tv/5pkgs/default.nix
index 05dc02887..da3c914b8 100644
--- a/tv/5pkgs/default.nix
+++ b/tv/5pkgs/default.nix
@@ -17,6 +17,7 @@
       erlang = pkgs.erlangR16;
     };
     ff = pkgs.callPackage ./ff {};
+    q = pkgs.callPackage ./q {};
     viljetic-pages = pkgs.callPackage ./viljetic-pages {};
     xmonad-tv = import ./xmonad-tv.nix { inherit pkgs; };
   };
diff --git a/tv/5pkgs/q/default.nix b/tv/5pkgs/q/default.nix
new file mode 100644
index 000000000..1d08a5447
--- /dev/null
+++ b/tv/5pkgs/q/default.nix
@@ -0,0 +1,193 @@
+{ pkgs, ... }:
+let
+  q-cal = let
+    # XXX 23 is the longest line of cal's output
+    pad = ''{
+      ${pkgs.gnused}/bin/sed '
+            # rtrim
+            s/ *$//
+
+            # delete last empty line
+            ''${/^$/d}
+          ' \
+        | ${pkgs.gawk}/bin/awk '{printf "%-23s\n", $0}' \
+        | ${pkgs.gnused}/bin/sed '
+              # colorize header
+              1,2s/.*/&/
+
+              # colorize week number
+              s/^[ 1-9][0-9]/&/
+            '
+    }'';
+  in ''
+    ${pkgs.coreutils}/bin/paste \
+        <(${pkgs.utillinux}/bin/cal -mw \
+              $(${pkgs.coreutils}/bin/date +'%m %Y' -d 'last month') \
+            | ${pad}
+        ) \
+        <(${pkgs.utillinux}/bin/cal -mw \
+            | ${pkgs.gnused}/bin/sed '
+                # colorize day of month
+                s/\(^\| \)'"$(${pkgs.coreutils}/bin/date +%e)"'\>/&/
+              ' \
+            | ${pad}
+        ) \
+        <(${pkgs.utillinux}/bin/cal -mw \
+              $(${pkgs.coreutils}/bin/date +'%m %Y' -d 'next month') \
+            | ${pad}
+        ) \
+      | ${pkgs.gnused}/bin/sed 's/\t/  /g'
+  '';
+
+  q-isodate = ''
+    ${pkgs.coreutils}/bin/date \
+        '+%Y-%m-%dT%H:%M:%S%:z'
+  '';
+
+  # Singapore's red is #ED2E38
+  q-sgtdate = ''
+    TZ=Asia/Singapore \
+    ${pkgs.coreutils}/bin/date \
+        '+%Y-%m-%dT%H:%M:%S%:z'
+  '';
+
+  q-gitdir = ''
+    if test -d .git; then
+      #git status --porcelain
+      branch=$(
+        ${pkgs.git}/bin/git branch \
+          | ${pkgs.gnused}/bin/sed -rn 's/^\* (.*)/\1/p'
+      )
+      echo "± $LOGNAME@''${HOSTNAME-$(${pkgs.nettools}/bin/hostname)}:$PWD .git $branch"
+    fi
+  '';
+
+  q-power_supply = ''
+    for uevent in /sys/class/power_supply/*/uevent; do
+      if test -f $uevent; then
+        eval "$(${pkgs.gnused}/bin/sed -n '
+          s/^\([A-Z_]\+=\)\(.*\)/\1'\'''\2'\'''/p
+        ' $uevent)"
+
+        if test "x''${POWER_SUPPLY_CHARGE_NOW-}" = x; then
+          continue
+        fi
+
+        charge_percentage=$(echo "
+          scale=2
+          $POWER_SUPPLY_CHARGE_NOW / $POWER_SUPPLY_CHARGE_FULL
+        " | ${pkgs.bc}/bin/bc)
+
+        lfc=$POWER_SUPPLY_CHARGE_FULL
+        rc=$POWER_SUPPLY_CHARGE_NOW
+        #rc=2800
+        N=78; N=76
+        N=10
+        n=$(echo $N-1 | ${pkgs.bc}/bin/bc)
+        centi=$(echo "$rc*100/$lfc" | ${pkgs.bc}/bin/bc)
+        deci=$(echo "$rc*$N/$lfc" | ${pkgs.bc}/bin/bc)
+        energy_evel=$(
+          echo -n '☳ ' # TRIGRAM FOR THUNDER
+          if   test $centi -ge 42; then echo -n ''
+          elif test $centi -ge 23; then echo -n ''
+          elif test $centi -ge 11; then echo -n ''
+          else                        echo -n ''; fi
+          for i in $(${pkgs.coreutils}/bin/seq 1 $deci); do
+            echo -n ■
+          done
+          echo -n ''
+          for i in $(${pkgs.coreutils}/bin/seq $deci $n); do
+            echo -n ■
+          done
+          echo '' $rc #/ $lfc
+        )
+        echo "$energy_evel $charge_percentage"
+      fi
+    done
+  '';
+
+  q-virtualization = ''
+    echo "VT: $(${pkgs.systemd}/bin/systemd-detect-virt)"
+  '';
+
+  q-wireless = ''
+    for dev in $(
+      ${pkgs.iw}/bin/iw dev \
+        | ${pkgs.gnused}/bin/sed -n 's/^\s*Interface\s\+\([0-9a-z]\+\)$/\1/p'
+    ); do
+      inet=$(${pkgs.iproute}/bin/ip addr show $dev \
+        | ${pkgs.gnused}/bin/sed -n '
+            s/.*inet \([0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\).*/\1/p
+          ') \
+        || unset inet
+      ssid=$(${pkgs.iw}/bin/iw dev $dev link \
+        | ${pkgs.gnused}/bin/sed -n '
+            s/.*\tSSID: \(.*\)/\1/p
+          ') \
+        || unset ssid
+      echo "$dev''${inet+ $inet}''${ssid+ $ssid}"
+    done
+  '';
+
+  q-online = ''
+    if ${pkgs.curl}/bin/curl -s google.com >/dev/null; then
+      echo 'online'
+    else
+      echo offline
+    fi
+  '';
+
+  q-thermal_zone = ''
+    for i in /sys/class/thermal/thermal_zone*; do
+      type=$(${pkgs.coreutils}/bin/cat $i/type)
+      temp=$(${pkgs.coreutils}/bin/cat $i/temp)
+      printf '%s %s°C\n' $type $(echo $temp / 1000 | ${pkgs.bc}/bin/bc)
+    done
+  '';
+
+  q-todo = ''
+    TODO_file=$HOME/TODO
+    if test -e "$TODO_file"; then
+      ${pkgs.coreutils}/bin/cat "$TODO_file" \
+        | ${pkgs.gawk}/bin/gawk -v now=$(${pkgs.coreutils}/bin/date +%s) '
+            BEGIN { print "remind=0" }
+            /^[0-9]/{
+              x = $1
+              gsub(".", "\\\\&", x)
+              rest = substr($0, index($0, " "))
+              rest = $0
+              sub(" *", "", rest)
+              gsub(".", "\\\\&", rest)
+              print "test $(${pkgs.coreutils}/bin/date +%s -d"x") -lt "now" && \
+                echo \"\x1b[38;5;208m\""rest esc "\"\x1b[m\" && \
+                (( remind++ ))"
+            }
+            END { print "test $remind = 0 && echo \"nothing to remind\"" }
+          ' \
+        | {
+          # bash needed for (( ... ))
+          ${pkgs.bash}/bin/bash
+        }
+    else
+      echo "$TODO_file: no such file or directory"
+    fi
+  '';
+
+in
+# bash needed for <(...)
+pkgs.writeBashBin "q" ''
+  set -eu
+  export PATH=/var/empty
+  ${q-cal}
+  echo
+  ${q-isodate}
+  ${q-sgtdate}
+  (${q-gitdir}) &
+  (${q-power_supply}) &
+  (${q-virtualization}) &
+  (${q-wireless}) &
+  (${q-online}) &
+  (${q-thermal_zone}) &
+  wait
+  ${q-todo}
+''
diff --git a/tv/5pkgs/xmonad-tv.nix b/tv/5pkgs/xmonad-tv.nix
index 74e43dc79..04e7e8359 100644
--- a/tv/5pkgs/xmonad-tv.nix
+++ b/tv/5pkgs/xmonad-tv.nix
@@ -1,14 +1,15 @@
 { pkgs, ... }:
-pkgs.writeHaskellBin "xmonad-tv" {
-  depends = [
-    "containers"
-    "unix"
-    "X11"
-    "xmonad"
-    "xmonad-contrib"
-    "xmonad-stockholm"
-  ];
-} ''
+pkgs.writeHaskell "xmonad-tv" {
+  executables.xmonad = {
+    extra-depends = [
+      "containers"
+      "unix"
+      "X11"
+      "xmonad"
+      "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]
-''
+  '';
+  };
+}