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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.emacs;
editorScript = pkgs.writeScriptBin "emacseditor" ''
#!${pkgs.runtimeShell}
if [ -z "$1" ]; then
exec ${cfg.package}/bin/emacsclient --create-frame --alternate-editor ${cfg.package}/bin/emacs
else
exec ${cfg.package}/bin/emacsclient --alternate-editor ${cfg.package}/bin/emacs "$@"
fi
'';
desktopApplicationFile = pkgs.writeTextFile {
name = "emacsclient.desktop";
destination = "/share/applications/emacsclient.desktop";
text = ''
[Desktop Entry]
Name=Emacsclient
GenericName=Text Editor
Comment=Edit text
MimeType=text/english;text/plain;text/x-makefile;text/x-c++hdr;text/x-c++src;text/x-chdr;text/x-csrc;text/x-java;text/x-moc;text/x-pascal;text/x-tcl;text/x-tex;application/x-shellscript;text/x-c;text/x-c++;
Exec=emacseditor %F
Icon=emacs
Type=Application
Terminal=false
Categories=Development;TextEditor;
StartupWMClass=Emacs
Keywords=Text;Editor;
'';
};
in {
options.services.emacs = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable a user service for the Emacs daemon. Use <literal>emacsclient</literal> to connect to the
daemon. If <literal>true</literal>, <varname>services.emacs.install</varname> is
considered <literal>true</literal>, whatever its value.
'';
};
install = mkOption {
type = types.bool;
default = false;
description = ''
Whether to install a user service for the Emacs daemon. Once
the service is started, use emacsclient to connect to the
daemon.
The service must be manually started for each user with
"systemctl --user start emacs" or globally through
<varname>services.emacs.enable</varname>.
'';
};
package = mkOption {
type = types.package;
default = pkgs.emacs;
defaultText = "pkgs.emacs";
description = ''
emacs derivation to use.
'';
};
defaultEditor = mkOption {
type = types.bool;
default = false;
description = ''
When enabled, configures emacsclient to be the default editor
using the EDITOR environment variable.
'';
};
};
config = mkIf (cfg.enable || cfg.install) {
systemd.user.services.emacs = {
description = "Emacs: the extensible, self-documenting text editor";
serviceConfig = {
Type = "forking";
ExecStart = "${pkgs.bash}/bin/bash -c 'source ${config.system.build.setEnvironment}; exec ${cfg.package}/bin/emacs --daemon'";
ExecStop = "${cfg.package}/bin/emacsclient --eval (kill-emacs)";
Restart = "always";
};
} // optionalAttrs cfg.enable { wantedBy = [ "default.target" ]; };
environment.systemPackages = [ cfg.package editorScript desktopApplicationFile ];
environment.variables.EDITOR = mkIf cfg.defaultEditor (mkOverride 900 "${editorScript}/bin/emacseditor");
};
meta.doc = ./emacs.xml;
}
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