6 files changed, 151 insertions, 0 deletions
diff --git a/_pastebins/gnu-guix-systemd-daemon-for-nixos.md b/_pastebins/gnu-guix-systemd-daemon-for-nixos.md
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+---
+title: GNU Guix systemd daemon for NixOS
+date: 2018-07-13
+layout: pastebin
+lang: en
+---
+
+```nix
+  # Derived from Guix guix-daemon.service.in
+  # https://git.savannah.gnu.org/cgit/guix.git/tree/etc/guix-daemon.service.in?id=00c86a888488b16ce30634d3a3a9d871ed6734a2
+  systemd.services.guix-daemon = {
+    enable = true;
+    description = "Build daemon for GNU Guix";
+    serviceConfig = {
+      ExecStart = "/var/guix/profiles/per-user/root/guix-profile/bin/guix-daemon --build-users-group=guixbuild";
+      Environment="GUIX_LOCPATH=/root/.guix-profile/lib/locale";
+      RemainAfterExit="yes";
+      StandardOutput="syslog";
+      StandardError="syslog";
+      TaskMax= 8192;
+    };
+    wantedBy = [ "multi-user.target" ];
+  };
+```
diff --git a/_pastebins/guix-builder-user-creation-commands.md b/_pastebins/guix-builder-user-creation-commands.md
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+---
+title: Guix builder user creation commands
+date: 2018-07-13
+layout: pastebin
+lang: en
+---
+
+```shell
+groupadd --system guixbuild
+for i in `seq -w 1 10`;
+do
+    useradd -g guixbuild -G guixbuild           \
+            -d /var/empty -s `which nologin`    \
+            -c "Guix build user $i" --system    \
+            guixbuilder$i;
+done
+```
diff --git a/_pastebins/guix-users-in-nixos-system-configuration.md b/_pastebins/guix-users-in-nixos-system-configuration.md
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+---
+title: Guix users in NixOS system configuration
+date: 2018-07-13
+layout: pastebin
+lang: en
+---
+
+```nix
+  users = {
+    mutableUsers = false;
+
+    extraUsers =
+      let
+        andrehUser =  {
+          andreh = {
+            # my custom user config
+          };
+        };
+        # From the Guix manual:
+        # https://www.gnu.org/software/guix/manual/en/html_node/Build-Environment-Setup.html#Build-Environment-Setup
+        buildUser = (i:
+          {
+            "guixbuilder${i}" = {                   # guixbuilder$i
+              group = "guixbuild";                  # -g guixbuild
+              extraGroups = ["guixbuild"];          # -G guixbuild
+              home = "/var/empty";                  # -d /var/empty
+              shell = pkgs.nologin;                 # -s `which nologin`
+              description = "Guix build user ${i}"; # -c "Guix buid user $i"
+              isSystemUser = true;                  # --system
+            };
+          }
+        );
+      in
+        # merge all users
+        pkgs.lib.fold (str: acc: acc // buildUser str)
+                      andrehUser
+                      # for i in `seq -w 1 10`
+                      (map (pkgs.lib.fixedWidthNumber 2) (builtins.genList (n: n+1) 10));
+
+    extraGroups.guixbuild = {
+      name = "guixbuild";
+    };
+  };
+```
diff --git a/_pastebins/nix-pinning.md b/_pastebins/nix-pinning.md
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+++ b/_pastebins/nix-pinning.md
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+---
+title: Nix pinning
+date: 2018-07-11
+layout: pastebin
+lang: en
+---
+
+```nix
+let
+  # Pin the nixpkgs version
+  stdenv = pkgs.stdenv;
+  pkgsOriginal = import <nixpkgs> {};
+  pkgsSrc = pkgsOriginal.fetchzip {
+    url = "https://github.com/NixOS/nixpkgs/archive/18.03.zip";
+    sha256 = "0hk4y2vkgm1qadpsm4b0q1vxq889jhxzjx3ragybrlwwg54mzp4f";
+  };
+
+  pkgs = import (pkgsSrc) {};
+
+  buildNodeJS = pkgs.callPackage <nixpkgs/pkgs/development/web/nodejs/nodejs.nix> {};
+
+in rec {
+  nodeFromNVMRC = buildNodeJS {
+    version = "8.7.0";
+    sha256 = "16mml3cwjnq7yf9yd67d2dybav3nvbnk89fkixs1wz7fd26d05ss";
+    patches = [];
+  };
+}
+```
diff --git a/_pastebins/nix-string-padding.md b/_pastebins/nix-string-padding.md
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+++ b/_pastebins/nix-string-padding.md
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+---
+title: Nix string padding
+date: 2018-07-13
+layout: pastebin
+lang: en
+---
+
+```nix
+padString = (n: if n < 10 then "0" + toString n else toString n)
+```
diff --git a/_pastebins/rpn-macro-setup.md b/_pastebins/rpn-macro-setup.md
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+++ b/_pastebins/rpn-macro-setup.md
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+---
+title: RPN macro setup
+date: 2016-04-05
+layout: pastebin
+lang: en
+---
+
+```lisp
+(defmacro rpn (body)
+  (rpn-expander body))
+
+(defun rpn-expander (body)
+  (mapcar (lambda (x)
+                (if (listp x)
+                    (rpn-expander x)
+                    x))
+          (reverse body)))
+
+(rpn ((2 1 +) 2 *))
+; => 6
+
+#|
+Just a quick stub.
+
+One could easily improve #'RPN-EXPANDER in order to better suit one's needs.
+|#
+```