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Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= Original-Sender: "Debbugs-submit" Resent-CC: guix-patches@gnu.org Resent-Date: Thu, 22 Sep 2022 08:54:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 57963 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: Andrew Tropin , Taiju HIGASHI Cc: 57963@debbugs.gnu.org, Liliana Marie Prikler Received: via spool by 57963-submit@debbugs.gnu.org id=B57963.166383683928019 (code B ref 57963); Thu, 22 Sep 2022 08:54:02 +0000 Received: (at 57963) by debbugs.gnu.org; 22 Sep 2022 08:53:59 +0000 Received: from localhost ([127.0.0.1]:36320 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1obHy3-0007Hq-H0 for submit@debbugs.gnu.org; Thu, 22 Sep 2022 04:53:59 -0400 Received: from eggs.gnu.org ([209.51.188.92]:37694) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1obHy1-0007Hd-Pm for 57963@debbugs.gnu.org; Thu, 22 Sep 2022 04:53:59 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:50598) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1obHxu-00041I-WC; 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spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: B7332224BE X-Spam-Score: -2.24 X-Migadu-Scanner: scn1.migadu.com X-TUID: 9FjWveicSnCz Hi Andrew, Andrew Tropin skribis: > 2. We had a discussion with Ludovic about rde home services vs guix home > services styles. And this one looks like rde style, not guix. > > rde takes arbitrary s-exps and g-exps with optional structure checks and > serializes them to target format. > > guix uses nested records with rigid nesting structure. That=E2=80=99s generally true, but it=E2=80=99s not black and white and the= re=E2=80=99s room for discussion. :-) In this case, Taiju=E2=80=99s proposal is to let users write snippets like = this: --8<---------------cut here---------------start------------->8--- (define font-family-map '((sans-serif . "Noto Sans CJK JP") (serif . "Noto Serif CJK JP"))) (home-environment (packages (list font-google-noto)) (services (list (simple-service 'my-fontconfig-service home-fontconfig-service-type (list (call-with-output-string (lambda (port) (sxml->xml (map (lambda (pair) `(alias (family ,(car pair)) (prefer (family ,(cdr pair))))) font-family-map) port)))))))) --8<---------------cut here---------------end--------------->8--- (With v2 they=E2=80=99d provide SXML instead of XML-in-a-string, so it=E2= =80=99s slightly less verbose but quite similar.) In this particular case, I would find it easier to use if one could provide a set of records, let=E2=80=99s say along these lines: (simple-service 'my-fontconfig-service home-fontconfig-service-type (list (font-alias 'sans-serif "Noto Sans CJK JP") =E2=80= =A6)) That way, users wouldn=E2=80=99t need to know the details of the XML syntax= for fontconfig. The downside is that it restricts what can be done: it lets you add font aliases, but nothing more. Do you have other use cases in mind, Taiju? Thanks, Ludo=E2=80=99.