From ad09bf96388acd8302dfd9ed52f8c88464064472 Mon Sep 17 00:00:00 2001
From: Tomas Volf <~@wolfsden.cz>
Date: Sun, 6 Oct 2024 17:22:57 +0200
Subject: [PATCH] services: nginx-upstream-configuration: Allow file-like
 objects
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* gnu/services/web.scm (emit-nginx-upstream-config): Support file-like
objects.
* doc/guix.texi (Web Services)[nginx-upstream-configuration]: Document it.

Change-Id: I49996e358174dc77b31e3c91b908a6a72f3eb705
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
---
 doc/guix.texi        | 11 ++++++++++-
 gnu/services/web.scm |  6 ++++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index f71f0b6561..1c39628ffa 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -32342,7 +32342,16 @@ the default port is 80, and a different port can be specified
 explicitly.
 
 @item @code{extra-content}
-A string or list of strings to add to the upstream block.
+Additional content to be appended to the upstream block.  Can be a
+string or file-like object or list of thereof.  In case of list, each
+item is prefixed with indentation and suffixed with a new line.  Nested
+lists are flattened.
+
+@lisp
+(extra-content "include /etc/nginx/custom-config.conf;")
+(extra-content `("include /etc/nginx/custom-config.conf;"
+                 ("include " ,%custom-config.conf ";")))
+@end lisp
 
 @end table
 @end deftp
diff --git a/gnu/services/web.scm b/gnu/services/web.scm
index 6f77efaaf2..3997fe2ab8 100644
--- a/gnu/services/web.scm
+++ b/gnu/services/web.scm
@@ -704,8 +704,10 @@ of index files."
          (cons
           "\n"
           (map (lambda (line)
-                 (simple-format #f "      ~A\n" line))
-               (flatten extra-content)))
+                 `("      " ,line "\n"))
+               (if (list? extra-content)
+                   extra-content
+                   (list extra-content))))
          '()))
    "    }\n"))