Merge remote-tracking branch 'cd/master' into newmaster2

19 files changed, 3 insertions, 1833 deletions

diff --git a/3modules/krebs/default.nix b/3modules/krebs/default.nix
deleted file mode 100644
index a53597f..0000000
--- a/3modules/krebs/default.nix
+++ /dev/null
@@ -1,498 +0,0 @@
-{ config, lib, ... }:
-
-with import ../../4lib/krebs { inherit lib; };
-let
-  cfg = config.krebs;
-
-  out = {
-    imports = [
-      ./github-hosts-sync.nix
-      ./git.nix
-      ./nginx.nix
-      ./retiolum.nix
-      ./urlwatch.nix
-    ];
-    options.krebs = api;
-    config = mkIf cfg.enable imp;
-  };
-
-  api = {
-    enable = mkEnableOption "krebs";
-
-    build = mkOption {
-      type = types.submodule ({ config, ... }: {
-        options = {
-          target = mkOption {
-            type = with types; nullOr str;
-            default = null;
-          };
-          deps = mkOption {
-            type = with types; attrsOf (submodule {
-              options = {
-                url = mkOption {
-                  type = str;
-                };
-                rev = mkOption {
-                  type = nullOr str;
-                  default = null;
-                };
-              };
-            });
-            default = {};
-          };
-          script = mkOption {
-            type = types.str;
-            default = ''
-              #! /bin/sh
-              set -efux
-
-              target=${escapeShellArg cfg.build.target}
-
-              push(){(
-                src=$1/
-                dst=$target:$2
-                rsync \
-                  --exclude .git \
-                  --exclude .graveyard \
-                  --exclude old \
-                  --rsync-path="mkdir -p \"$dst\" && rsync" \
-                  --usermap=\*:0 \
-                  --groupmap=\*:0 \
-                  --delete-excluded \
-                  -vrLptgoD \
-                  "$src" "$dst"
-              )}
-
-              ${concatStrings (mapAttrsToList (name: { url, rev, ... }:
-                optionalString (rev == null) ''
-                  push ${toString (map escapeShellArg [
-                    "${url}"
-                    "/root/src/${name}"
-                  ])}
-                '') config.deps)}
-
-              exec ssh -S none "$target" /bin/sh <<\EOF
-              set -efux
-              fetch(){(
-                url=$1
-                rev=$2
-                dst=$3
-                mkdir -p "$dst"
-                cd "$dst"
-                if ! test -e .git; then
-                  git init
-                fi
-                if ! cur_url=$(git config remote.origin.url 2>/dev/null); then
-                  git remote add origin "$url"
-                elif test "$cur_url" != "$url"; then
-                  git remote set-url origin "$url"
-                fi
-                if test "$(git rev-parse --verify HEAD 2>/dev/null)" != "$rev"; then
-                  git fetch origin
-                  git checkout "$rev" -- .
-                  git checkout -q "$rev"
-                  git submodule init
-                  git submodule update
-                fi
-                git clean -dxf
-              )}
-
-              ${concatStrings (mapAttrsToList (name: { url, rev, ... }:
-                optionalString (rev != null) ''
-                  fetch ${toString (map escapeShellArg [
-                    url
-                    rev
-                    "/root/src/${name}"
-                  ])}
-                '') config.deps)}
-
-              echo build system...
-              profile=/nix/var/nix/profiles/system
-              NIX_PATH=/root/src \
-              nix-env \
-                -Q \
-                -p "$profile" \
-                -f '<stockholm>' \
-                --set \
-                -A system \
-                --argstr user-name ${escapeShellArg cfg.build.user.name} \
-                --argstr system-name ${escapeShellArg cfg.build.host.name}
-
-              exec "$profile"/bin/switch-to-configuration switch
-              EOF
-            '';
-          };
-          host = mkOption {
-            type = types.host;
-          };
-          user = mkOption {
-            type = types.user;
-          };
-        };
-      });
-      # Define defaul value, so unset values of the submodule get reported.
-      default = {};
-    };
-
-    dns = {
-      providers = mkOption {
-        # TODO with types; tree dns.label dns.provider, so we can merge.
-        # Currently providers can only be merged if aliases occur just once.
-        type = with types; attrsOf unspecified;
-      };
-    };
-
-    hosts = mkOption {
-      type = with types; attrsOf host;
-    };
-
-    users = mkOption {
-      type = with types; attrsOf user;
-    };
-
-    # XXX is there a better place to define search-domain?
-    # TODO search-domains :: listOf hostname
-    search-domain = mkOption {
-      type = types.hostname;
-      default = "retiolum";
-    };
-  };
-
-  imp = mkMerge [
-    { krebs = lass-imp; }
-    { krebs = makefu-imp; }
-    { krebs = tv-imp; }
-    {
-      krebs.dns.providers = {
-        de.krebsco = "ovh";
-        internet = "hosts";
-        retiolum = "hosts";
-        de.habsys = "hosts";
-        de.pixelpocket = "hosts";
-        de.karlaskop = "hosts";
-        de.ubikmedia = "hosts";
-        de.apanowicz = "hosts";
-      };
-
-      # XXX This overlaps with krebs.retiolum
-      networking.extraHosts = concatStringsSep "\n" (flatten (
-        mapAttrsToList (hostname: host:
-          mapAttrsToList (netname: net:
-            let
-              aliases = toString (unique (longs ++ shorts));
-              providers = dns.split-by-provider net.aliases cfg.dns.providers;
-              longs = providers.hosts;
-              shorts = map (removeSuffix ".${cfg.search-domain}") longs;
-            in
-            map (addr: "${addr} ${aliases}") net.addrs
-          ) host.nets
-        ) cfg.hosts
-      ));
-    }
-  ];
-
-  lass-imp = {
-    hosts = addNames {
-      cloudkrebs = {
-        cores = 1;
-        dc = "lass"; #dc = "cac";
-        nets = rec {
-          internet = {
-            addrs4 = ["104.167.113.104"];
-            aliases = [
-              "cloudkrebs.internet"
-            ];
-          };
-          retiolum = {
-            via = internet;
-            addrs4 = ["10.243.206.102"];
-            addrs6 = ["42:941e:2816:35f4:5c5e:206b:3f0b:f762"];
-            aliases = [
-              "cloudkrebs.retiolum"
-              "cgit.cloudkrebs.retiolum"
-              "habsys.de"
-              "pixelpocket.de"
-              "karlaskop.de"
-              "ubikmedia.de"
-              "apanowicz.de"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEAttUygCu7G6lIA9y+9rfTpLKIy2UgNDglUVoKZYLs8JPjtAtQVbtA
-              OcWwwPc8ijLQvwJWa8e/shqSzSIrtOe+HJbRGdXLdBLtOuLKpz+ZFHcS+95RS5aF
-              QTehg+QY7pvhbrrwKX936tkMR568suTQG6C8qNC/5jWYO/wIxFMhnQ2iRRKQOq1v
-              3aGGPC16KeXKVioY9KoV98S3n1rZW1JK07CIsZU4qb5txtLlW6FplJ7UmhVku1WC
-              sgOOj9yi6Zk1t8R2Pwv9gxa3Hc270voj5U+I2hgLV/LjheE8yhQgYHEA4vXerPdO
-              TGSATlSmMtE2NYGrKsLM7pKn286aSpXinwIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-      };
-      uriel = {
-        cores = 1;
-        dc = "lass";
-        nets = rec {
-          retiolum = {
-            addrs4 = ["10.243.81.176"];
-            addrs6 = ["42:dc25:60cf:94ef:759b:d2b6:98a9:2e56"];
-            aliases = [
-              "uriel.retiolum"
-              "cgit.uriel.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEAzw0pvoEmqeqiZrzSOPH0IT99gr1rrvMZbvabXoU4MAiVgGoGrkmR
-              duJkk8Fj12ftMc+Of1gnwDkFhRcfAKOeH1RSc4CTircWVq99WyecTwEZoaR/goQb
-              MND022kIBoG6NQNxv1Y5I1B/h7hfloMFEPym9oFtOAXoGhBY2vVl4g64NNz+RLME
-              m1RipLXKANAh6LRNPGPQCUYX4TVY2ZJVxM3CM1XdomUAdOYXJmWFyUg9NcIKaacx
-              uRrmuy7J9yFBcihZX5Y7NV361kINrpRmZYxJRf9cr0hb5EkJJ7bMIKQMEFQ5RnYo
-              u7MPGKD7aNHa6hLLCeIfJ5u0igVmSLh3pwIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-      };
-      mors = {
-        cores = 2;
-        dc = "lass";
-        nets = rec {
-          retiolum = {
-            addrs4 = ["10.243.0.2"];
-            addrs6 = ["42:0:0:0:0:0:0:dea7"];
-            aliases = [
-              "mors.retiolum"
-              "cgit.mors.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEAsj1PCibKOfF68gmFQ+wwyfhUWpqKqpznrJX1dZ+daae7l7nBHvsE
-              H0QwkiMmk3aZy1beq3quM6gX13aT+/wMfWnLyuvT11T5C9JEf/IS91STpM2BRN+R
-              +P/DhbuDcW4UsdEe6uwQDGEJbXRN5ZA7GI0bmcYcwHJ9SQmW5v7P9Z3oZ+09hMD+
-              1cZ3HkPN7weSdMLMPpUpmzCsI92cXGW0xRC4iBEt1ZeBwjkLCRsBFBGcUMuKWwVa
-              9sovca0q3DUar+kikEKVrVy26rZUlGuBLobMetDGioSawWkRSxVlfZvTHjAK5JzU
-              O6y6hj0yQ1sp6W2JjU8ntDHf63aM71dB9QIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-        secure = true;
-      };
-
-    };
-    users = addNames {
-      lass = {
-        pubkey = readFile ../../Zpubkeys/lass.ssh.pub;
-      };
-      uriel = {
-        pubkey = readFile ../../Zpubkeys/uriel.ssh.pub;
-      };
-    };
-  };
-
-  makefu-imp = {
-    hosts = addNames {
-      pnp = {
-        cores = 1;
-        dc = "makefu"; #vm on 'omo'
-        nets = {
-          retiolum = {
-            addrs4 = ["10.243.0.210"];
-            addrs6 = ["42:f9f1:0000:0000:0000:0000:0000:0001"];
-            aliases = [
-              "pnp.retiolum"
-              "cgit.pnp.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEAugkgEK4iy2C5+VZHwhjj/q3IOhhazE3TYHuipz37KxHWX8ZbjH+g
-              Ewtm79dVysujAOX8ZqV8nD8JgDAvkIZDp8FCIK0/rgckhpTsy1HVlHxa7ECrOS8V
-              pGz4xOxgcPFRbv5H2coHtbnfQc4GdA5fcNedQ3BP3T2Tn7n/dbbVs30bOP5V0EMR
-              SqZwNmtqaDQxOvjpPg9EoHvAYTevrpbbIst9UzCyvmNli9R+SsiDrzEPgB7zOc4T
-              TG12MT+XQr6JUu4jPpzdhb6H/36V6ADCIkBjzWh0iSfWGiFDQFinD+YSWbA1NOTr
-              Qtd1I3Ov+He7uc2Z719mb0Og2kCGnCnPIwIDAQAB
-              -----END RSA PUBLIC KEY-----
-              '';
-          };
-        };
-      };
-    };
-    users = addNames {
-      makefu = {
-        mail = "root@euer.krebsco.de";
-        pubkey = readFile ../../Zpubkeys/makefu_arch.ssh.pub;
-      };
-    };
-  };
-
-  tv-imp = {
-    dns.providers = {
-      de.viljetic = "regfish";
-    };
-    hosts = addNames {
-      cd = {
-        cores = 2;
-        dc = "tv"; #dc = "cac";
-        nets = rec {
-          internet = {
-            addrs4 = ["162.219.7.216"];
-            aliases = [
-              "cd.internet"
-              "cd.viljetic.de"
-              "cgit.cd.viljetic.de"
-              "cd.krebsco.de"
-            ];
-          };
-          retiolum = {
-            via = internet;
-            addrs4 = ["10.243.113.222"];
-            addrs6 = ["42:4522:25f8:36bb:8ccb:0150:231a:2af3"];
-            aliases = [
-              "cd.retiolum"
-              "cgit.cd.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIICCgKCAgEAvmCBVNKT/Su4v9nl/Nm3STPo5QxWPg7xEkzIs3Oh39BS8+r6/7UQ
-              rebib7mczb+ebZd+Rg2yFoGrWO8cmM0VcLy5bYRMK7in8XroLEjWecNNM4TRfNR4
-              e53+LhcPdkxo0A3/D+yiut+A2Mkqe+4VXDm/JhAiAYkZTn7jUtj00Atrc7CWW1gN
-              sP3jIgv4+CGftdSYOB4dm699B7OD9XDLci2kOaFqFl4cjDYUok03G0AduUlRx10v
-              CKbKOTIdm8C36A902/3ms+Hyzkruu+VagGIZuPSwqXHJPCu7Ju+jarKQstMmpQi0
-              PubweWDL0o/Dfz2qT3DuL4xDecIvGE6kv3m41hHJYiK+2/azTSehyPFbsVbL7w0V
-              LgKN3usnZNcpTsBWxRGT7nMFSnX2FLDu7d9OfCuaXYxHVFLZaNrpccOq8NF/7Hbk
-              DDW81W7CvLyJDlp0WLnAawSOGTUTPoYv/2wAapJ89i8QGCueGvEc6o2EcnBVMFEW
-              ejWTQzyD816f4RsplnrRqLVlIMbr9Q/n5TvlgjjhX7IMEfMy4+7qLGRQkNbFzgwK
-              jxNG2fFSCjOEQitm0gAtx7QRIyvYr6c7/xiHz4AwxYzBmvQsL/OK57NO4+Krwgj5
-              Vk8TQ2jGO7J4bB38zaxK+Lrtfl8i1AK1171JqFMhOc34JSJ7T4LWDMECAwEAAQ==
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-      };
-      mkdir = {
-        cores = 1;
-        dc = "tv"; #dc = "cac";
-        nets = rec {
-          internet = {
-            addrs4 = ["162.248.167.241"];
-            aliases = [
-              "mkdir.internet"
-            ];
-          };
-          retiolum = {
-            via = internet;
-            addrs4 = ["10.243.113.223"];
-            addrs6 = ["42:4522:25f8:36bb:8ccb:0150:231a:2af4"];
-            aliases = [
-              "mkdir.retiolum"
-              "cgit.mkdir.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEAuyfM+3od75zOYXqnqRMAt+yp/4z/vC3vSWdjUvEmCuM23c5BOBw+
-              dKqbWoSPTzOuaQ0szdL7a6YxT+poSUXd/i3pPz59KgCl192rd1pZoJKgvoluITev
-              voYSP9rFQOUrustfDb9qKW/ZY95cwdCvypo7Vf4ghxwDCnlmyCGz7qXTJMLydNKF
-              2PH9KiY4suv15sCg/zisu+q0ZYQXUc1TcgpoIYBOftDunOJoNdbti+XjwWdjGmJZ
-              Bn4GelsrrpwJFvfDmouHUe8GsD7nTgbZFtiJbKfCEiK16N0Q0d0ZFHhAV2nPjsk2
-              3JhG4n9vxATBkO82f7RLrcrhkx9cbLfN3wIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-      };
-      nomic = {
-        cores = 2;
-        dc = "tv"; #dc = "gg23";
-        nets = rec {
-          retiolum = {
-            addrs4 = ["10.243.0.110"];
-            addrs6 = ["42:02d5:733f:d6da:c0f5:2bb7:2b18:09ec"];
-            aliases = [
-              "nomic.retiolum"
-              "cgit.nomic.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEAwb8Yk/YRc17g2J9n960p6j4W/l559OPyuMPdGJ4DmCm3WNQtxoa+
-              qTFUiDiI85BcmfqnSeddLG8zTC2XnSlIvCRMJ9oKzppFM4PX4OTAaJZVE5WyCQhw
-              Kd4tHVdoQgJW5yFepmT9IUmHqkxXJ0R2W93l2eSZNOcnFvFn0ooiAlRi4zAiHClu
-              5Mz80Sc2rvez+n9wtC2D06aYjP23pHYld2xighHR9SUqX1dFzgSXNSoWWCcgNp2a
-              OKcM8LzxLV7MTMZFOJCJndZ77e4LsUvxhQFP6nyKZWg30PC0zufZsuN5o2xsWSlA
-              Wi9sMB1AUR6mZrxgcgTFpUjbjbLQf+36CwIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-        secure = true;
-      };
-      rmdir = {
-        cores = 1;
-        dc = "tv"; #dc = "cac";
-        nets = rec {
-          internet = {
-            addrs4 = ["167.88.44.94"];
-            aliases = [
-              "rmdir.internet"
-            ];
-          };
-          retiolum = {
-            via = internet;
-            addrs4 = ["10.243.113.224"];
-            addrs6 = ["42:4522:25f8:36bb:8ccb:0150:231a:2af5"];
-            aliases = [
-              "rmdir.retiolum"
-              "cgit.rmdir.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEA+twy4obSbJdmZLfBoe9YYeyoDnXkO/WPa2D6Eh6jXrWk5fbhBjRf
-              i3EAQfLiXXFJX3E8V8YvJyazXklI19jJtCLDiu/F5kgJJfyAkWHH+a/hcg7qllDM
-              Xx2CvS/nCbs+p48/VLO6zLC7b1oHu3K/ob5M5bwPK6j9NEDIL5qYiM5PQzV6zryz
-              hS9E/+l8Z+UUpYcfS3bRovXJAerB4txc/gD3Xmptq1zk53yn1kJFYfVlwyyz+NEF
-              59JZj2PDrvWoG0kx/QjiNurs6XfdnyHe/gP3rmSTrihKFVuA3cZM62sDR4FcaeWH
-              SnKSp02pqjBOjC/dOK97nXpKLJgNH046owIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-      };
-      wu = {
-        cores = 4;
-        # TODO wu is mobile, so dc means "home data center"
-        dc = "tv"; #dc = "gg23";
-        nets = {
-          retiolum = {
-            addrs4 = ["10.243.13.37"];
-            addrs6 = ["42:0:0:0:0:0:0:1337"];
-            aliases = [
-              "wu.retiolum"
-            ];
-            tinc.pubkey = ''
-              -----BEGIN RSA PUBLIC KEY-----
-              MIIBCgKCAQEArDvU0cuBsVqTjCX2TlWL4XHSy4qSjUhjrDvUPZSKTVN7x6OENCUn
-              M27g9H7j4/Jw/8IHoJLiKnXHavOoc9UJM+P9Fla/4TTVADr69UDSnLgH+wGiHcEg
-              GxPkb2jt0Z8zcpD6Fusj1ATs3sssaLHTHvg1D0LylEWA3cI4WPP13v23PkyUENQT
-              KpSWfR+obqDl38Q7LuFi6dH9ruyvqK+4syddrBwjPXrcNxcGL9QbDn7+foRNiWw4
-              4CE5z25oGG2iWMShI7fe3ji/fMUAl7DSOOrHVVG9eMtpzy+uI8veOHrdTax4oKik
-              AFGCrMIov3F0GIeu3nDlrTIZPZDTodbFKQIDAQAB
-              -----END RSA PUBLIC KEY-----
-            '';
-          };
-        };
-        secure = true;
-      };
-    };
-    users = addNames {
-      mv = {
-        mail = "mv@cd.retiolum";
-        pubkey = readFile ../../Zpubkeys/mv_vod.ssh.pub;
-      };
-      tv = {
-        mail = "tv@wu.retiolum";
-        pubkey = readFile ../../Zpubkeys/tv_wu.ssh.pub;
-      };
-    };
-  };
-
-in
-out
diff --git a/3modules/krebs/git.nix b/3modules/krebs/git.nix
deleted file mode 100644
index 6046451..0000000
--- a/3modules/krebs/git.nix
+++ /dev/null
@@ -1,490 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-# TODO unify logging of shell scripts to user and journal
-# TODO move all scripts to ${etcDir}, so ControlMaster connections
-#       immediately pick up new authenticators
-# TODO when authorized_keys changes, then restart ssh
-#       (or kill already connected users somehow)
-
-with import ../../4lib/krebs { inherit lib; };
-let
-  cfg = config.krebs.git;
-
-  out = {
-    # TODO don't import krebs.nginx here
-    imports = [
-      ../../3modules/krebs/nginx.nix
-    ];
-    options.krebs.git = api;
-    config = mkIf cfg.enable (mkMerge [
-      (mkIf cfg.cgit cgit-imp)
-      git-imp
-    ]);
-  };
-
-  api = {
-    enable = mkEnableOption "krebs.git";
-
-    cgit = mkOption {
-      type = types.bool;
-      default = true;
-      description = ''
-          Enable cgit.
-          Cgit is an attempt to create a fast web interface for the git version
-          control system, using a built in cache to decrease pressure on the 
-          git server.
-          cgit in this module is being served via fastcgi nginx.This module
-          deploys a http://cgit.<hostname> nginx configuration and enables nginx
-          if not yet enabled.
-          '';
-    };
-    dataDir = mkOption {
-      type = types.str;
-      default = "/var/lib/git";
-      description = "Directory used to store repositories.";
-    };
-    etcDir = mkOption {
-      type = types.str;
-      default = "/etc/git";
-    };
-    repos = mkOption {
-      type = types.attrsOf (types.submodule ({
-        options = {
-          desc = mkOption {
-            type = types.nullOr types.str;
-            default = null;
-            description = ''
-              Repository description.
-            '';
-          };
-          section = mkOption {
-            type = types.nullOr types.str;
-            default = null;
-            description = ''
-              Repository section.
-            '';
-          };
-          name = mkOption {
-            type = types.str;
-            description = ''
-              Repository name.
-            '';
-          };
-          hooks = mkOption {
-            type = types.attrsOf types.str;
-            default = {};
-            description = ''
-              Repository-specific hooks.
-            '';
-          };
-          public = mkOption {
-            type = types.bool;
-            default = false;
-            description = ''
-              Allow everybody to read the repository via HTTP if cgit enabled.
-            '';
-            # TODO allow every configured user to fetch the repository via SSH.
-          };
-        };
-      }));
-
-      default = {};
-
-      example = literalExample ''
-        {
-          testing = {
-            name = "testing";
-            hooks.post-update = '''
-              #! /bin/sh
-              set -euf
-              echo post-update hook: $* >&2
-            ''';
-          };
-          testing2 = { name = "testing2"; };
-        }
-      '';
-
-      description = ''
-        Repositories.
-      '';
-    };
-    root-desc = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      description = ''
-        Text printed below the heading on the repository index page.
-        Default value: "a fast webinterface for the git dscm".
-      '';
-    };
-    root-title = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      description = ''
-        Text printed as heading on the repository index page.
-        Default value: "Git Repository Browser".
-      '';
-    };
-    rules = mkOption {
-      type = types.unspecified;
-    };
-  };
-
-  git-imp = {
-    system.activationScripts.git-init = "${init-script}";
-    
-    # TODO maybe put all scripts here and then use PATH?
-    environment.etc."${etc-base}".source =
-      scriptFarm "git-ssh-authorizers" {
-        authorize-command = makeAuthorizeScript (map ({ repo, user, perm }: [
-          (map getName (ensureList user))
-          (map getName (ensureList repo))
-          (map getName perm.allow-commands)
-        ]) cfg.rules);
-    
-        authorize-push = makeAuthorizeScript (map ({ repo, user, perm }: [
-          (map getName (ensureList user))
-          (map getName (ensureList repo))
-          (ensureList perm.allow-receive-ref)
-          (map getName perm.allow-receive-modes)
-        ]) (filter (x: hasAttr "allow-receive-ref" x.perm) cfg.rules));
-      };
-    
-    users.extraUsers = singleton {
-      description = "Git repository hosting user";
-      name = "git";
-      shell = "/bin/sh";
-      openssh.authorizedKeys.keys =
-        mapAttrsToList (_: makeAuthorizedKey git-ssh-command)
-          config.krebs.users;
-      uid = 129318403; # genid git
-    };
-  };
-
-  cgit-imp = {
-    users.extraUsers = lib.singleton {
-      inherit (fcgitwrap-user) group name uid;
-      home = toString (pkgs.runCommand "empty" {} "mkdir -p $out");
-    };
-
-    users.extraGroups = lib.singleton {
-      inherit (fcgitwrap-group) gid name;
-    };
-
-    services.fcgiwrap = {
-      enable = true;
-      user = fcgitwrap-user.name;
-      group = fcgitwrap-user.group;
-      # socketAddress = "/run/fcgiwrap.sock" (default)
-      # socketType = "unix" (default)
-    };
-
-    environment.etc."cgitrc".text = ''
-      css=/static/cgit.css
-      logo=/static/cgit.png
-
-      # if you do not want that webcrawler (like google) index your site
-      robots=noindex, nofollow
-
-      virtual-root=/
-
-      # TODO make this nicer (and/or somewhere else)
-      cache-root=/tmp/cgit
-
-      cache-size=1000
-      enable-commit-graph=1
-      enable-index-links=1
-      enable-index-owner=0
-      enable-log-filecount=1
-      enable-log-linecount=1
-      enable-remote-branches=1
-
-      ${optionalString (cfg.root-title != null) "root-title=${cfg.root-title}"}
-      ${optionalString (cfg.root-desc != null) "root-desc=${cfg.root-desc}"}
-
-      snapshots=0
-      max-stats=year
-
-      ${concatMapStringsSep "\n" (repo: ''
-        repo.url=${repo.name}
-        repo.path=${cfg.dataDir}/${repo.name}
-        ${optionalString (repo.section != null) "repo.section=${repo.section}"}
-        ${optionalString (repo.desc != null) "repo.desc=${repo.desc}"}
-      '') (filter isPublicRepo (attrValues cfg.repos))}
-    '';
-
-    system.activationScripts.cgit = ''
-      mkdir -m 0700 -p /tmp/cgit
-      chown ${toString fcgitwrap-user.uid}:${toString fcgitwrap-group.gid} /tmp/cgit
-    '';
-
-    krebs.nginx = {
-      enable = true;
-      servers.cgit = {
-        server-names = [
-          "cgit.${config.networking.hostName}"
-          "cgit.${config.networking.hostName}.retiolum"
-        ];
-        locations = [
-          (nameValuePair "/" ''
-            include             ${pkgs.nginx}/conf/fastcgi_params;
-            fastcgi_param       SCRIPT_FILENAME ${pkgs.cgit}/cgit/cgit.cgi;
-            fastcgi_param       PATH_INFO       $uri;
-            fastcgi_param       QUERY_STRING    $args;
-            fastcgi_param       HTTP_HOST       $server_name;
-            fastcgi_pass        unix:${config.services.fcgiwrap.socketAddress};
-          '')
-          (nameValuePair "/static/" ''
-            root ${pkgs.cgit}/cgit;
-            rewrite ^/static(/.*)$ $1 break;
-          '')
-        ];
-      };
-    };
-  };
-
-  fcgitwrap-user = {
-    name = "fcgiwrap";
-    uid = 2867890860; # genid fcgiwrap
-    group = "fcgiwrap";
-  };
-
-  fcgitwrap-group = {
-    name = fcgitwrap-user.name;
-    gid = fcgitwrap-user.uid;
-  };
-
-
-  ensureList = x:
-    if typeOf x == "list" then x else [x];
-
-  getName = x: x.name;
-
-  isPublicRepo = getAttr "public"; # TODO this is also in ./cgit.nix
-
-  makeAuthorizedKey = git-ssh-command: user@{ name, pubkey, ... }:
-    # TODO assert name
-    # TODO assert pubkey
-    let
-      options = concatStringsSep "," [
-        ''command="exec ${git-ssh-command} ${name}"''
-        "no-agent-forwarding"
-        "no-port-forwarding"
-        "no-pty"
-        "no-X11-forwarding"
-      ];
-    in
-    "${options} ${pubkey}";
-
-  # [case-pattern] -> shell-script
-  # Create a shell script that succeeds (exit 0) when all its arguments
-  # match the case patterns (in the given order).
-  makeAuthorizeScript =
-    let
-      # TODO escape
-      to-pattern = x: concatStringsSep "|" (ensureList x);
-      go = i: ps:
-        if ps == []
-          then "exit 0"
-          else ''
-            case ''$${toString i} in ${to-pattern (head ps)})
-            ${go (i + 1) (tail ps)}
-            esac'';
-    in
-    patterns: ''
-      #! /bin/sh
-      set -euf
-      ${concatStringsSep "\n" (map (go 1) patterns)}
-      exit -1
-    '';
-
-  reponames = rules: sort lessThan (unique (map (x: x.repo.name) rules));
-
-  # TODO makeGitHooks that uses runCommand instead of scriptFarm?
-  scriptFarm =
-    farm-name: scripts:
-    let
-      makeScript = script-name: script-string: {
-        name = script-name;
-        path = pkgs.writeScript "${farm-name}_${script-name}" script-string;
-      };
-    in
-    pkgs.linkFarm farm-name (mapAttrsToList makeScript scripts);
-
-
-  git-ssh-command = pkgs.writeScript "git-ssh-command" ''
-    #! /bin/sh
-    set -euf
-
-    PATH=${makeSearchPath "bin" (with pkgs; [
-      coreutils
-      git
-      gnugrep
-      gnused
-      systemd
-    ])}
-
-    abort() {
-      echo "error: $1" >&2
-      systemd-cat -p err -t git echo "error: $1"
-      exit -1
-    }
-
-    GIT_SSH_USER=$1
-
-    systemd-cat -p info -t git echo \
-      "authorizing $GIT_SSH_USER $SSH_CONNECTION $SSH_ORIGINAL_COMMAND"
-
-    # References: The Base Definitions volume of
-    # POSIX.1‐2013, Section 3.278, Portable Filename Character Set
-    portable_filename_bre="^[A-Za-z0-9._-]\\+$"
-
-    command=$(echo "$SSH_ORIGINAL_COMMAND" \
-      | sed -n 's/^\([^ ]*\) '"'"'\(.*\)'"'"'/\1/p' \
-      | grep "$portable_filename_bre" \
-      || abort 'cannot read command')
-
-    GIT_SSH_REPO=$(echo "$SSH_ORIGINAL_COMMAND" \
-      | sed -n 's/^\([^ ]*\) '"'"'\(.*\)'"'"'/\2/p' \
-      | grep "$portable_filename_bre" \
-      || abort 'cannot read reponame')
-
-    ${cfg.etcDir}/authorize-command \
-        "$GIT_SSH_USER" "$GIT_SSH_REPO" "$command" \
-      || abort 'access denied'
-
-    repodir=${escapeShellArg cfg.dataDir}/$GIT_SSH_REPO
-
-    systemd-cat -p info -t git \
-      echo "authorized exec $command $repodir"
-
-    export GIT_SSH_USER
-    export GIT_SSH_REPO
-    exec "$command" "$repodir"
-  '';
-
-  init-script = pkgs.writeScript "git-init" ''
-    #! /bin/sh
-    set -euf
-
-    PATH=${makeSearchPath "bin" (with pkgs; [
-      coreutils
-      findutils
-      gawk
-      git
-      gnugrep
-      gnused
-    ])}
-
-    dataDir=${escapeShellArg cfg.dataDir}
-    mkdir -p "$dataDir"
-
-    # Notice how the presence of hooks symlinks determine whether
-    # we manage a repositry or not.
-
-    # Make sure that no existing repository has hooks.  We can delete
-    # symlinks because we assume we created them.
-    find "$dataDir" -mindepth 2 -maxdepth 2 -name hooks -type l -delete
-    bad_hooks=$(find "$dataDir" -mindepth 2 -maxdepth 2 -name hooks)
-    if echo "$bad_hooks" | grep -q .; then
-      printf 'error: unknown hooks:\n%s\n' \
-        "$(echo "$bad_hooks" | sed 's/^/  /')" \
-        >&2
-      exit -1
-    fi
-
-    # Initialize repositories.
-    ${concatMapStringsSep "\n" (repo:
-      let
-        hooks = scriptFarm "git-hooks" (makeHooks repo);
-      in
-      ''
-        reponame=${escapeShellArg repo.name}
-        repodir=$dataDir/$reponame
-        mode=${toString (if isPublicRepo repo then 0711 else 0700)}
-        if ! test -d "$repodir"; then
-          mkdir -m "$mode" "$repodir"
-          git init --bare --template=/var/empty "$repodir"
-          chown -R git:nogroup "$repodir"
-        fi
-        ln -s ${hooks} "$repodir/hooks"
-      ''
-    ) (attrValues cfg.repos)}
-
-    # Warn about repositories that exist but aren't mentioned in the
-    # current configuration (and thus didn't receive a hooks symlink).
-    unknown_repos=$(find "$dataDir" -mindepth 1 -maxdepth 1 \
-      -type d \! -exec test -e '{}/hooks' \; -print)
-    if echo "$unknown_repos" | grep -q .; then
-      printf 'warning: stale repositories:\n%s\n' \
-        "$(echo "$unknown_repos" | sed 's/^/  /')" \
-        >&2
-    fi
-  '';
-
-  makeHooks = repo: removeAttrs repo.hooks [ "pre-receive" ] // {
-    pre-receive = ''
-      #! /bin/sh
-      set -euf
-
-      PATH=${makeSearchPath "bin" (with pkgs; [
-        coreutils # env
-        git
-        systemd
-      ])}
-
-      accept() {
-        #systemd-cat -p info -t git echo "authorized $1"
-        accept_string="''${accept_string+$accept_string
-      }authorized $1"
-      }
-      reject() {
-        #systemd-cat -p err -t git echo "denied $1"
-        #echo 'access denied' >&2
-        #exit_code=-1
-        reject_string="''${reject_string+$reject_string
-      }access denied: $1"
-      }
-
-      empty=0000000000000000000000000000000000000000
-
-      accept_string=
-      reject_string=
-      while read oldrev newrev ref; do
-
-        if [ $oldrev = $empty ]; then
-          receive_mode=create
-        elif [ $newrev = $empty ]; then
-          receive_mode=delete
-        elif [ "$(git merge-base $oldrev $newrev)" = $oldrev ]; then
-          receive_mode=fast-forward
-        else
-          receive_mode=non-fast-forward
-        fi
-
-        if ${cfg.etcDir}/authorize-push \
-            "$GIT_SSH_USER" "$GIT_SSH_REPO" "$ref" "$receive_mode"; then
-          accept "$receive_mode $ref"
-        else
-          reject "$receive_mode $ref"
-        fi
-      done
-
-      if [ -n "$reject_string" ]; then
-        systemd-cat -p err -t git echo "$reject_string"
-        e