Merge branch 'master' of nomic:config into tv

8 files changed, 306 insertions, 25 deletions

diff --git a/lib/default.nix b/lib/default.nix
index 27cf0e250..164a6a1aa 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -1,4 +1,4 @@
-{ lib, ... }:
+{ lib, pkgs, ... }:
 
 with builtins;
 
@@ -11,6 +11,7 @@ rec {
     lib = lib // {
       inherit addNames;
     };
+    inherit pkgs;
   };
 
   addName = name: set:
diff --git a/lib/git.nix b/lib/git.nix
index 5916cf83c..b28d89413 100644
--- a/lib/git.nix
+++ b/lib/git.nix
@@ -1,7 +1,7 @@
-{ lib, ... }:
+{ lib, pkgs, ... }:
 
 let
-  inherit (lib) addNames;
+  inherit (lib) addNames escapeShellArg makeSearchPath;
 
   commands = addNames {
     git-receive-pack = {};
@@ -37,5 +37,139 @@ let
     master = "refs/heads/master";
     all-heads = "refs/heads/*";
   };
+
+  irc-announce-script = pkgs.writeScript "irc-announce-script" ''
+    #! /bin/sh
+    set -euf
+
+    export PATH=${makeSearchPath "bin" (with pkgs; [
+      coreutils
+      gawk
+      gnused
+      netcat
+    ])}
+
+    IRC_SERVER="$1"
+    IRC_PORT="$2"
+    IRC_NICK="$3"
+    IRC_CHANNEL="$4"
+    message=$5
+
+    export IRC_CHANNEL # for privmsg_cat
+
+    # echo2 and cat2 are used output to both, stdout and stderr
+    # This is used to see what we send to the irc server. (debug output)
+    echo2() { echo "$*"; echo "$*" >&2; }
+    cat2() { tee /dev/stderr; }
+
+    # privmsg_cat transforms stdin to a privmsg
+    privmsg_cat() { awk '{ print "PRIVMSG "ENVIRON["IRC_CHANNEL"]" :"$0 }'; }
+
+    # ircin is used to feed the output of netcat back to the "irc client"
+    # so we can implement expect-like behavior with sed^_^
+    # XXX mkselfdestructingtmpfifo would be nice instead of this cruft
+    tmpdir="$(mktemp -d irc-announce_XXXXXXXX)"
+    cd "$tmpdir"
+    mkfifo ircin
+    trap "
+      rm ircin
+      cd '$OLDPWD'
+      rmdir '$tmpdir'
+      trap - EXIT INT QUIT
+    " EXIT INT QUIT
+
+    {
+      echo2 "USER $LOGNAME 0 * :$LOGNAME@$(hostname)"
+      echo2 "NICK $IRC_NICK"
+
+      # wait for MODE message
+      sed -n '/^:[^ ]* MODE /q'
+
+      echo2 "JOIN $IRC_CHANNEL"
+
+      printf '%s' "$message" \
+        | privmsg_cat \
+        | cat2
+
+      echo2 "PART $IRC_CHANNEL"
+
+      # wait for PART confirmation
+      sed -n '/:'"$IRC_NICK"'![^ ]* PART /q'
+
+      echo2 'QUIT :Gone to have lunch'
+    } < ircin \
+      | nc "$IRC_SERVER" "$IRC_PORT" | tee -a ircin
+  '';
+
+  hooks = {
+    # TODO make this a package?
+    irc-announce = { nick, channel, server, port ? 6667 }: ''
+      #! /bin/sh
+      set -euf
+
+      export PATH=${makeSearchPath "bin" (with pkgs; [
+        coreutils
+        git
+        gnused
+      ])}
+
+      nick=${escapeShellArg nick}
+      channel=${escapeShellArg channel}
+      server=${escapeShellArg server}
+      port=${toString port}
+
+      empty=0000000000000000000000000000000000000000
+
+      unset message
+      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)" = $oldrev ]; then
+          receive_mode=fast-forward
+        else
+          receive_mode=non-fast-forward
+        fi
+
+        h=$(echo $ref | sed 's:^refs/heads/::')
+
+        # empty_tree=$(git hash-object -t tree /dev/null
+        empty_tree=4b825dc6
+
+        id=$(echo $oldrev | cut -b-7)
+        id2=$(echo $newrev | cut -b-7)
+        if [ $oldrev = $empty ]; then id=$empty_tree; fi
+        if [ $newrev = $empty ]; then id2=$empty_tree; fi
+
+        case $receive_mode in
+          create)
+            #git log --oneline $id2
+            link="http://cd/cgit/$GIT_SSH_REPO/"
+            ;;
+          fast-forward|non-fast-forward)
+            #git diff --stat $id..$id2
+            link="http://cd/cgit/$GIT_SSH_REPO/diff/?h=$h&id=$id&id2=$id2"
+            ;;
+        esac
+
+        #host=$nick
+        #$host $GIT_SSH_REPO $ref $link
+        message="''${message+$message
+      }$GIT_SSH_USER $receive_mode pushed $link"
+      done
+
+      if test -n "''${message-}"; then
+        exec ${irc-announce-script} \
+          "$server" \
+          "$port" \
+          "$nick" \
+          "$channel" \
+          "$message"
+      fi
+    '';
+  };
+
 in
-commands // receive-modes // permissions // refs
+commands // receive-modes // permissions // refs // hooks
diff --git a/modules/cd/default.nix b/modules/cd/default.nix
index 1d621e03d..7223203a0 100644
--- a/modules/cd/default.nix
+++ b/modules/cd/default.nix
@@ -11,7 +11,7 @@
       ../tv/base-cac-CentOS-7-64bit.nix
       ../tv/ejabberd.nix # XXX echtes modul
       ../tv/exim-smarthost.nix
-      ../tv/git.nix
+      ../tv/git
       ../tv/retiolum.nix
       ../tv/sanitize.nix
     ];
@@ -48,7 +48,7 @@
     let
       inherit (builtins) readFile;
       # TODO lib should already include our stuff
-      inherit (import ../../lib { inherit lib; }) addNames git;
+      inherit (import ../../lib { inherit lib pkgs; }) addNames git;
     in
     rec {
       enable = true;
@@ -59,31 +59,38 @@
         makefu = { pubkey = "xxx"; };
       };
 
-      # TODO warn about stale repodirs
       repos = addNames {
+        shitment = {
+          desc = "shitment repository";
+          hooks = {
+            post-receive = git.irc-announce {
+              nick = config.networking.hostName; # TODO make this the default
+              channel = "#retiolum";
+              server = "ire.retiolum";
+            };
+          };
+          public = true;
+        };
         testing = {
+          desc = "testing repository";
           hooks = {
-            update = ''
-              #! /bin/sh
-              set -euf
-              echo update hook: $* >&2
-            '';
-            post-update = ''
-              #! /bin/sh
-              set -euf
-              echo post-update hook: $* >&2
-            '';
+            post-receive = git.irc-announce {
+              nick = config.networking.hostName; # TODO make this the default
+              channel = "#repository";
+              server = "ire.retiolum";
+            };
           };
+          public = true;
         };
       };
 
       rules = with git; with users; with repos; [
         { user = tv;
-          repo = testing;
+          repo = [ testing shitment ];
           perm = push master [ non-fast-forward create delete merge ];
         }
         { user = [ lass makefu ];
-          repo = testing;
+          repo = [ testing shitment ];
           perm = fetch;
         }
       ];
diff --git a/modules/cd/iptables.nix b/modules/cd/iptables.nix
index 48425e8dc..950aa8472 100644
--- a/modules/cd/iptables.nix
+++ b/modules/cd/iptables.nix
@@ -63,6 +63,7 @@
           ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request
           ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request
 
+          ipXtables -A Retiolum -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW
 
           ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"}
           ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset
diff --git a/modules/tv/git/cgit.nix b/modules/tv/git/cgit.nix
new file mode 100644
index 000000000..edee19909
--- /dev/null
+++ b/modules/tv/git/cgit.nix
@@ -0,0 +1,110 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (builtins) attrValues filter getAttr;
+  inherit (lib) concatMapStringsSep mkIf optionalString;
+
+  cfg = config.services.git;
+
+  isPublicRepo = getAttr "public"; # TODO this is also in ./default.nix
+in
+
+{
+  config = mkIf cfg.cgit {
+
+    users.extraUsers = lib.singleton {
+      name = "fcgiwrap";
+      uid = 2851179180; # genid fcgiwrap
+      group = "fcgiwrap";
+      home = "/var/empty";
+    };
+
+    users.extraGroups = lib.singleton {
+      name = "fcgiwrap";
+      gid = 2851179180; # genid fcgiwrap
+    };
+
+    services.fcgiwrap = {
+      enable = true;
+      user = "fcgiwrap";
+      group = "fcgiwrap";
+      # socketAddress = "/run/fcgiwrap.sock" (default)
+      # socketType = "unix" (default)
+    };
+
+    environment.etc."cgitrc".text = ''
+      css=/cgit-static/cgit.css
+      logo=/cgit-static/cgit.png
+
+      # if you do not want that webcrawler (like google) index your site
+      robots=noindex, nofollow
+
+      virtual-root=/cgit
+
+      # TODO make this nicer
+      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
+
+      root-title=repositories at ${config.networking.hostName}
+      root-desc=keep calm and engage
+
+      snapshots=0
+      max-stats=year
+
+      ${concatMapStringsSep "\n" (repo: ''
+        repo.url=${repo.name}
+        repo.path=${cfg.dataDir}/${repo.name}
+        ${optionalString (repo.desc != null) "repo.desc=${repo.desc}"}
+      '') (filter isPublicRepo (attrValues cfg.repos))}
+    '';
+
+    # TODO modular nginx configuration
+    services.nginx =
+      let
+        name = config.networking.hostName;
+        qname = "${name}.retiolum";
+      in
+        {
+          enable = true;
+          httpConfig = ''
+            include           ${pkgs.nginx}/conf/mime.types;
+            default_type      application/octet-stream;
+            sendfile          on;
+            keepalive_timeout 65;
+            gzip              on;
+            server {
+              listen 80;
+              server_name ${name} ${qname} localhost;
+              root ${pkgs.cgit}/cgit;
+
+              location /cgit-static {
+                rewrite ^/cgit-static(/.*)$ $1 break;
+                #expires 30d;
+              }
+
+              location /cgit {
+                include             ${pkgs.nginx}/conf/fastcgi_params;
+                fastcgi_param       SCRIPT_FILENAME $document_root/cgit.cgi;
+                #fastcgi_param       PATH_INFO       $uri;
+                fastcgi_split_path_info ^(/cgit/?)(.+)$;
+                fastcgi_param PATH_INFO $fastcgi_path_info;
+                fastcgi_param       QUERY_STRING    $args;
+                fastcgi_param       HTTP_HOST       $server_name;
+                fastcgi_pass        unix:${config.services.fcgiwrap.socketAddress};
+              }
+
+              location / {
+                return 404;
+              }
+            }
+          '';
+        };
+  };
+}
diff --git a/modules/tv/git.nix b/modules/tv/git/default.nix
index d264125dc..50e2f9206 100644
--- a/modules/tv/git.nix
+++ b/modules/tv/git/default.nix
@@ -2,8 +2,8 @@
 
 let
   inherit (builtins)
-    attrNames attrValues concatLists filter hasAttr head lessThan removeAttrs
-    tail toJSON typeOf;
+    attrNames attrValues concatLists getAttr filter hasAttr head lessThan
+    removeAttrs tail toJSON typeOf;
   inherit (lib)
     concatMapStringsSep concatStringsSep escapeShellArg hasPrefix
     literalExample makeSearchPath mapAttrsToList mkIf mkOption optionalString
@@ -16,6 +16,8 @@ let
 
   getName = x: x.name;
 
+  isPublicRepo = getAttr "public"; # TODO this is also in ./cgit.nix
+
   makeAuthorizedKey = command-script: user@{ name, pubkey }:
     # TODO assert name
     # TODO assert pubkey
@@ -78,12 +80,21 @@ in
 #       (or kill already connected users somehow)
 
 {
+  imports = [
+    ./cgit.nix
+  ];
+
   options.services.git = {
     enable = mkOption {
       type = types.bool;
       default = false;
       description = "Enable Git repository hosting.";
     };
+    cgit = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Enable cgit."; # TODO better desc; talk about nginx
+    };
     dataDir = mkOption {
       type = types.str;
       default = "/var/lib/git";
@@ -99,6 +110,13 @@ in
     repos = mkOption {
       type = types.attrsOf (types.submodule ({
         options = {
+          desc = mkOption {
+            type = types.nullOr types.str;
+            default = null;
+            description = ''
+              Repository description.
+            '';
+          };
           name = mkOption {
             type = types.str;
             description = ''
@@ -111,6 +129,14 @@ in
               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.
+          };
         };
       }));
 
@@ -230,8 +256,9 @@ in
           ''
             reponame=${escapeShellArg repo.name}
             repodir=$dataDir/$reponame
+            mode=${toString (if isPublicRepo repo then 0711 else 0700)}
             if ! test -d "$repodir"; then
-              mkdir -m 0700 "$repodir"
+              mkdir -m "$mode" "$repodir"
               git init --bare --template=/var/empty "$repodir"
               chown -R git: "$repodir"
             fi
diff --git a/modules/wu/default.nix b/modules/wu/default.nix
index 84a8361af..68475ad5b 100644
--- a/modules/wu/default.nix
+++ b/modules/wu/default.nix
@@ -1,7 +1,7 @@
 { config, pkgs, ... }:
 
 let
-  lib = import ../../lib { inherit pkgs; };
+  lib = import ../../lib { lib = pkgs.lib; inherit pkgs; };
 
   inherit (lib) majmin;
 in
diff --git a/modules/wu/users.nix b/modules/wu/users.nix
index 88f2b658e..4c8631489 100644
--- a/modules/wu/users.nix
+++ b/modules/wu/users.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 
 let
   inherit (builtins) attrValues;
@@ -194,7 +194,8 @@ let
   sudoers =
     let
       inherit (builtins) filter hasAttr;
-      inherit (import ../../lib { inherit pkgs; }) concat isSuffixOf removeSuffix setToList;
+      inherit (import ../../lib { inherit lib pkgs; })
+        concat isSuffixOf removeSuffix setToList;
 
       hasMaster = { group ? "", ... }:
         isSuffixOf "-sub" group;