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separate templating from file system outputs

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This commit is contained in:
Valentin Gagarin 2024-11-13 15:24:41 +01:00
parent 24bd786896
commit c8caf09ebf
3 changed files with 76 additions and 71 deletions
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63
presentation/default.nix
View file

@ -7,16 +7,24 @@ let
templates = import ./templates.nix { inherit lib; };
in
{
options.templates = mkOption {
options.templates =
let
# arbitrarily nested attribute set where the leaves are of type `type`
# NOTE: due to how `either` works, the first match is significant,
# so if `type` happens to be an attrset, the typecheck will consider
# `type`, not `attrsOf`
recursiveAttrs = type: with types; attrsOf (either type (recursiveAttrs type));
in
mkOption {
description = ''
Collection of named functions to convert page contents to files
Collection of named functions to convert document contents to a string representation
Each template function takes the complete site `config` and the page data structure.
Each template function takes the complete site `config` and the document's data structure.
'';
type = with types; attrsOf (functionTo (functionTo options.files.type));
type = recursiveAttrs (with types; functionTo (functionTo str));
};
config.templates =
config.templates.html =
let
commonmark = name: markdown: pkgs.runCommand "${name}.html"
{
@ -26,13 +34,7 @@ in
'';
in
{
page = lib.mkDefault (config: page: {
# TODO: create static redirects from `tail page.locations`
# TODO: reconsider using `page.outPath` and what to put into `locations`.
# maybe we can avoid having ".html" suffixes there.
# since templates can output multiple files, `html` is merely one of many things we *could* produce.
# TODO: maybe it would even make sense to split routing and rendering altogether
${page.outPath} = builtins.toFile "${page.name}.html" (templates.html {
page = lib.mkDefault (config: page: templates.html {
head = ''
<title>${page.title}</title>
<meta name="description" content="${page.description}" />
@ -43,10 +45,7 @@ in
${builtins.readFile (commonmark page.name page.body)}
'';
});
});
article = lib.mkDefault (config: page: {
# TODO: create static redirects from `tail page.locations`
${page.outPath} = builtins.toFile "${page.name}.html" (templates.html {
article = lib.mkDefault (config: page: templates.html {
head = ''
<title>${page.title}</title>
<meta name="description" content="${page.description}" />
@ -57,7 +56,6 @@ in
${builtins.readFile (commonmark page.name page.body)}
'';
});
});
};
options.files = mkOption {
@ -71,25 +69,24 @@ in
};
config.files =
# TODO: create static redirects from `tail page.locations`
let
pages = lib.concatMapAttrs
(name: page: page.template config page)
config.pages;
collections =
let
byCollection = with lib; mapAttrs
(_: collection:
map (entry: entry.template config entry) collection.entry
pages = lib.attrValues config.pages;
collections = with lib; concatMap (collection: collection.entry) (attrValues config.collections);
collections' = with lib; map
(
entry: recursiveUpdate entry {
locations = map (l: "${entry.collection.name}/${l}") entry.locations;
}
)
config.collections;
collections;
in
with lib; concatMapAttrs
(collection: entries:
foldl' (acc: entry: acc // entry) { } entries
)
byCollection;
in
pages // collections;
with lib; foldl
(acc: elem: acc // {
"${head elem.locations}" = builtins.toFile "${elem.name}.html" elem.outputs.html;
})
{ }
(pages ++ collections');
options.build = mkOption {
description = ''

32
structure/content-types.nix
View file

@ -16,12 +16,15 @@ in
config.content-types = {
document = { name, config, ... }: {
options = {
name = mkOption {
description = "Symbolic name, used as a human-readable identifier";
type = types.str;
default = name;
};
# TODO: reconsider using `page.outPath` and what to put into `locations`.
# maybe we can avoid having ".html" suffixes there.
# since templates can output multiple files, `html` is merely one of many things we *could* produce.
# TODO: make `apply` configurable so one can programmatically modify locations
locations = mkOption {
description = ''
List of historic output locations for the resulting file
@ -44,17 +47,11 @@ in
type = types.str;
default = lib.head config.locations;
};
# TODO: maybe it would even make sense to split routing and rendering altogether.
# in that case, templates would return strings, and a different
# piece of the machinery resolves rendering templates to files
# using `locations`.
# then we'd have e.g. `templates.html` and `templates.atom` for
# different output formats.
template = mkOption {
outputs = mkOption {
description = ''
Function that converts the page contents to files
Representations of the document in different formats
'';
type = with types; functionTo (functionTo options.files.type);
type = with types; attrsOf str;
};
};
};
@ -85,12 +82,17 @@ in
type = types.str;
};
};
config.template = cfg.templates.page;
config.outputs.html = cfg.templates.html.page cfg config;
};
article = { config, collectionName, ... }: {
article = { config, collection, ... }: {
imports = [ cfg.content-types.page ];
options = {
collection = mkOption {
description = "Collection this article belongs to";
type = options.collections.type.nestedTypes.elemType;
default = collection;
};
date = mkOption {
description = "Publication date";
type = with types; nullOr str;
@ -103,8 +105,10 @@ in
};
};
config.name = lib.slug config.title;
config.outPath = "${collectionName}/${lib.head config.locations}";
config.template = lib.mkForce cfg.templates.article;
# TODO: this should be covered by the TBD `link` function instead,
# taking a historical list of collection names into account
config.outPath = "${collection.name}/${lib.head config.locations}";
config.outputs.html = lib.mkForce (cfg.templates.html.article cfg config);
};
named-link = { ... }: {

8
structure/default.nix
View file

@ -42,11 +42,15 @@ in
description = "Type of entries in the collection";
type = types.deferredModule;
};
name = mkOption {
description = "Symbolic name, used as a human-readable identifier";
type = types.str;
default = name;
};
entry = mkOption {
description = "An entry in the collection";
type = types.collection (types.submodule ({
_module.args.collection = config.entry;
_module.args.collectionName = name;
_module.args.collection = config;
imports = [ config.type ];
}));
};