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feat: add base_path support for mounting under a URL prefix

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Wraps the router in axum's `nest` when BOOK_BASE_PATH is set, prepends
the prefix to form actions and asset URLs, and exposes a {{base}}
template placeholder. basePath option added to the NixOS module.
This commit is contained in:
Lewis Wynne 2026-04-29 01:40:48 +01:00
parent b784f4dd9c
commit 6ca40e2321
9 changed files with 251 additions and 14 deletions
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17
module.nix
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@ -30,6 +30,18 @@ in
description = "Site title shown in nav and page title.";
};
basePath = mkOption {
type = types.str;
default = "";
example = "/guestbook";
description = ''
URL prefix the guestbook is mounted at. Empty serves at the domain root.
When set, all routes (/, /submit, /drawings/*, /voice_notes/*) are
mounted under the prefix, and form actions and asset URLs include it.
Templates can interpolate the prefix with the {{base}} placeholder.
'';
};
user = mkOption {
type = types.str;
default = "guestbook";
@ -268,13 +280,13 @@ in
templateFile = mkOption {
type = types.nullOr types.path;
default = null;
description = "Custom HTML template file with {{title}}, {{form}}, {{entries}}, and {{style}} placeholders. Uses built-in default if null.";
description = "Custom HTML template file with {{title}}, {{form}}, {{entries}}, {{style}}, and {{base}} placeholders. Uses built-in default if null.";
};
successTemplateFile = mkOption {
type = types.nullOr types.path;
default = null;
description = "Custom success page template with {{title}} and {{style}} placeholders. Uses built-in default if null.";
description = "Custom success page template with {{title}}, {{style}}, and {{base}} placeholders. Uses built-in default if null.";
};
labels = {
@ -380,6 +392,7 @@ in
BOOK_CONTENT_REQUIRED = if cfg.content.required then "true" else "false";
BOOK_TEXTAREA_WIDTH = toString cfg.styles.message.width;
BOOK_TEXTAREA_HEIGHT = toString cfg.styles.message.height;
BOOK_BASE_PATH = cfg.basePath;
} // lib.optionalAttrs (cfg.styles.cssFile != null) {
BOOK_STYLE_FILE = cfg.styles.cssFile;
} // lib.optionalAttrs (cfg.styles.templateFile != null) {