package yocaml

get_dependencies rule returns the dependencies of the rule.

get_task rule returns the task of the rule.

Create a task with fixed deps and without task.

Create a new build rules.

watch file generates an Arrow that adds a file to the dependency list without reading it. It can be useful for making file generation dependent on other files. For example :

let track_binary_update = watch Sys.argv.(0)

Which adds the generating binary to the list of dependencies.

create_file target build_rule executes the build_rule task if the dependencies are not up-to-date for target (or target does not exist).

Copy files from a destination to a source, taking account of dependencies.

Arrow version of a file reader.

Pipe an arrow to an other and concat the results.

Concat two files.

Read a file and parse metadata in the header. If the metadata is invalid, the arrow will throw an error. The first module defines how to go from string to structured object (for example the module Yocaml_yaml which process Yaml) and the second one describes the parsed metadata (see: Metadata).

Applies a file as a template. (and replacing the metadata). Once the content has been transformed, the arrow returns a pair containing the metadata and the file content injected into the template. The first module describes how to make a metadata compliant with a template language (e.g. Mustache) and the second describes how to apply the template with variables.

When a template should be applied without body.

Sometimes it is necessary to calculate a page according to other pages, for example to make an index of articles. With collection you can separate this procedure into 3 steps.

• First, it executes an effect that acts on a list
• Then it goes through the list of collected data and applies an arbitrary arrow to it.
• Finally, it applies an aggregate function to the collected list.

For example, let's build our index by projecting the list of articles into the Articles metadata:

let index =
  let open Build in
  let* articles =
    collection
      (read_child_files "articles/" (with_extension "md"))
      (fun source ->
        track_binary_update
        >>> Yocaml_yaml.read_file_with_metadata
              (module Metadata.Article)
              source
        >>^ fun (x, _) -> x, article_destination source)
      (fun x (meta, content) ->
        x
        |> Metadata.Articles.make
             ?title:(Metadata.Page.title meta)
             ?description:(Metadata.Page.description meta)
        |> Metadata.Articles.sort_articles_by_date
        |> fun x -> x, content)
  in
  create_file
    (into destination "index.html")
    (track_binary_update
    >>> Yocaml_yaml.read_file_with_metadata
          (module Metadata.Page)
          "index.md"
    >>> Yocaml_markdown.content_to_html ()
    >>> articles
    >>> Yocaml_mustache.apply_as_template
          (module Metadata.Articles)
          "templates/list.html"
    >>> Yocaml_mustache.apply_as_template
          (module Metadata.Articles)
          "templates/layout.html"
    >>^ Stdlib.snd)
;;