113 lines
2.7 KiB
Nix
113 lines
2.7 KiB
Nix
# This module includes the NixOS man-pages in the system environment,
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# and optionally starts a browser that shows the NixOS manual on one
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# of the virtual consoles. The latter is useful for the installation
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# CD.
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{ config, pkgs, baseModules, ... } @ extraArgs:
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with pkgs.lib;
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let
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cfg = config.services.nixosManual;
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manual = import ../../../doc/manual {
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inherit pkgs;
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revision =
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let fn = "${toString pkgs.path}/.git-revision";
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in if pathExists fn then readFile fn else "master";
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options = (fixMergeModules baseModules
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(removeAttrs extraArgs ["config" "options"]) // {
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modules = [ ];
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}).options;
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};
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entry = "${manual.manual}/share/doc/nixos/manual.html";
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help = pkgs.writeScriptBin "nixos-help"
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''
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#! ${pkgs.stdenv.shell} -e
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browser="$BROWSER"
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if [ -z "$browser" ]; then
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browser="$(type -P xdg-open || true)"
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if [ -z "$browser" ]; then
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browser="$(type -P w3m || true)"
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if [ -z "$browser" ]; then
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echo "$0: unable to start a web browser; please set \$BROWSER"
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exit 1
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fi
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fi
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fi
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exec "$browser" ${entry}
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'';
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in
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{
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options = {
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services.nixosManual.enable = mkOption {
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default = true;
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type = types.bool;
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description = ''
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Whether to build the NixOS manual pages.
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'';
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};
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services.nixosManual.showManual = mkOption {
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default = false;
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description = ''
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Whether to show the NixOS manual on one of the virtual
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consoles.
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'';
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};
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services.nixosManual.ttyNumber = mkOption {
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default = "8";
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description = ''
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Virtual console on which to show the manual.
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'';
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};
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services.nixosManual.browser = mkOption {
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default = "${pkgs.w3m}/bin/w3m";
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description = ''
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Browser used to show the manual.
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'';
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};
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};
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config = mkIf cfg.enable {
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system.build.manual = manual;
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environment.systemPackages = [ manual.manpages help ];
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boot.extraTTYs = mkIf cfg.showManual ["tty${cfg.ttyNumber}"];
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systemd.services = optionalAttrs cfg.showManual
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{ "nixos-manual" =
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{ description = "NixOS Manual";
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wantedBy = [ "multi-user.target" ];
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serviceConfig =
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{ ExecStart = "${cfg.browser} ${entry}";
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StandardInput = "tty";
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StandardOutput = "tty";
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TTYPath = "/dev/tty${cfg.ttyNumber}";
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TTYReset = true;
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TTYVTDisallocate = true;
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Restart = "always";
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};
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};
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};
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services.mingetty.helpLine = mkIf cfg.showManual
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"\nPress <Alt-F${toString cfg.ttyNumber}> for the NixOS manual.";
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};
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}
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