Text.Hakyll.ContextManipulations

This module exports a number of functions that produce HakyllActions to manipulate Contexts.

Documentation

renderValue

Arguments

:: String

Key of which the value should be copied.

-> String

Key the value should be copied to.

-> (String -> String)

Function to apply on the value.

-> HakyllAction Context Context

Do something with a value in a Context, but keep the old value as well. If the key given is not present in the Context, nothing will happen.

changeValue

Arguments

:: String

Key to change.

-> (String -> String)

Function to apply on the value.

-> HakyllAction Context Context

Change a value in a Context.

 import Data.Char (toUpper)
 changeValue "title" (map toUpper)

Will put the title in UPPERCASE.

changeUrl

Arguments

:: (String -> String)

Function to change URL with.

-> HakyllAction Context Context

Resulting action.

Change the URL of a page. This requires a special function, so dependency handling can happen correctly.

copyValue

Arguments

:: String

Source key.

-> String

Destination key.

-> HakyllAction Context Context

Copy a value from one key to another in a Context.

renderDate

Arguments

:: String

Key in which the rendered date should be placed.

-> String

Format to use on the date.

-> String

Default key, in case the date cannot be parsed.

-> HakyllAction Context Context

When the context has a key called path in a folder/yyyy-mm-dd-title.extension format (the convention for pages), this function can render the date.

 renderDate "date" "%B %e, %Y" "Date unknown"

Will render something like January 32, 2010.

changeExtension

Arguments

:: String

Extension to change to.

-> HakyllAction Context Context

Change the extension of a file. This is only needed when you want to render, for example, mardown to .php files instead of .html files.

 changeExtension "php"

Will render test.markdown to test.php instead of test.html.

renderBody :: (String -> String) -> HakyllAction Context Context

Change the body of a file using a certain manipulation.

 import Data.Char (toUpper)
 renderBody (map toUpper)

Will put the entire body of the page in UPPERCASE.