handlebars-helper-compose
v0.2.12
Published
{{compose}} handlebars helper. Inlines content from multiple files optionally using wildcard (globbing/minimatch) patterns, extracts YAML front matter to pass to context for each file. Accepts compare function as 3rd parameter for sorting inlined files. Good for blog posts, chapters, etc.
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{{compose}}
{{compose}} handlebars helper. Inlines content from multiple files optionally using wildcard (globbing/minimatch) patterns, extracts YAML front matter to pass to context for each file. Accepts compare function as 3rd parameter for sorting inlined files.
Quickstart
In the root of your project, run the following in the command line:
npm i handlebars-helper-compose --save-dev
Next, in your Gruntfile, simply add handlebars-helper-compose
to the helpers
property in the Assemble task or target options:
grunt.initConfig({
assemble: {
options: {
// the 'handlebars-helper-compose' modules must also be listed in devDependencies
// for assemble to automatically resolve the helper
helpers: ['handlebars-helper-compose']
}
files: {
'_gh_pages/': ['templates/*.hbs']
}
}
});
With that completed, you may now use the {{compose}}
helper in your templates:
{{compose src="blog/posts/*.md"}}
<h1>Title: {{@title}}</h1>
{{{@content}}}</p>
{{/compose}}
Note that the path used in the src
hash option is relative to the project root (e.g. Gruntfile).
Context & Lo-Dash templates
The helper will also process any valid Lo-Dash templates in the YAML front matter of any targeted files. For example:
---
title: <%= blog.title %>
post: 1
heading: <%= blog.title %> | Blog <%= post %>
---
<h1>{{title}}</h1>
<p class="heading">{{heading}}</p>
Options
src
Type: String
(optional)
Default: undefined
The file path of the file(s) to include. Glob patterns may be used.
cwd
Type: String
(optional)
Default: undefined
The cwd
for paths defined in the helper.
sep
Type: String
Default: \n
The separator to append after each inlined file.
marked
Type: Object
Default: \n
The separator to append after each inlined file.
filter
Type: function
Default: undefined
A custom function for filtering the array of paths returned from the src
property. This could potentially be more flexible, please make a feature request if you have a use case.
compare
Type: Function
Default: function(a, b) {return a.index >= b.index ? 1 : -1;}
Compare function for sorting the aggregated files.
Defining options
"assemble" task options
If you use Grunt and Assemble, you can pass options from the
assemble
task in the Gruntfile to the helper.
In your project's Gruntfile, options for the {{#compose}}...{{/compose}}
helper can be defined in the Assemble task options:
assemble: {
options: {
helpers: ['handlebars-helper-compose', 'foo/*.js'],
compose: {
cwd: './posts',
sep: '<!-- post -->',
compare: function(a, b) {
return a.index >= b.index ? 1 : -1;
}
}
},
files: {}
}
Note that the options are defined in options: {compose: {}}
, which is registered by this helper as a custom property in the Assemble options.
Examples
all options
assemble: {
options: {
compose: {
cwd: 'posts',
sep: '<!-- post -->',
compare: function(a, b) {
return a.index >= b.index ? 1 : -1;
}
}
}
}
filtering
Example: return only the last two items from the src
files array:
assemble: {
options: {
compose: {
cwd: 'posts',
sep: '<!-- post -->',
filter: function(arr) {
return arr.slice(Math.max(arr.length - 2, 0));
}
}
}
}
cwd option
Instead of defining the entire path in the src
hash option, like this:
{{compose src="path/to/my/blog/posts/*.md"}}
<h1>{{@title}}</h1>
{{@content}}
{{/compose}}
You could define the cwd
in the compose
options in your project's Gruntfile:
assemble: {
options: {
helpers: ['helper-compose'],
compose: {
cwd: 'path/to/my/blog'
}
}
}
and then define paths in the templates like this:
{{compose 'posts/*.md'}}
<h1>{{@title}}</h1>
{{@content}}
{{/compose}}
Usage example
In our Gruntfile, let's say we have the following config:
// Project configuration.
grunt.initConfig({
// Metadata for our blog.
blog: require('./test/fixtures/blog/blog.yml'),
assemble: {
options: {
helpers: ['handlebars-helper-compose'],
compose: {
cwd: 'blog',
sep: '<!-- post -->'
}
},
blog: {
src: ['index.hbs'],
dest: 'blog/'
}
}
});
page
...and index.hbs
file contains the following:
<!-- post -->
{{#compose src="posts/*.md" sep="<!-- post -->"}}
<h1>{{blog.title}}</h1>
<h2>Post title: {{@title}}</h2>
<p>{{{@content}}}</p>
{{/compose}}
posts
..and we have a few posts, monday.md
, tuesday.md
, and wednesday.md
, for example:
---
title: Monday
---
This is the {{title}} post...
result
The result, blog/index.html
would look something like:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>My Brilliant Blog</title>
</head>
<body>
<!-- post -->
<h1>My Brilliant Blog</h1>
<h2>Post title: Monday</h2>
<p>This is the Monday post...</p>
<!-- post -->
<h1>My Brilliant Blog</h1>
<h2>Post title: Tuesday</h2>
<p>This is the Tuesday post...</p>
<!-- post -->
<h1>My Brilliant Blog</h1>
<h2>Post title: Wednesday</h2>
<p>This is the Wednesday post...</p>
</body>
</html>
Author
Jon Schlinkert
License and Copyright
Licensed under the MIT License. Copyright (c) 2014 Jon Schlinkert, contributors.