forge-plugin-swig

A Swig templating plugin for forge. This plugin ingests data from a source and applies it to a swig template.

References:

• Swig Docs
• Swig Options
• Git Repo
• Default Custom Filter List

Installation

npm install @spikedpunch/forge-plugin-swig

Usage

//...
{
   alias: 'swigged',
   plugin: 'swig',
   use: 'data',
   // Provide an inline template
   template: `{{ data[0] | json(2) }}`,
   // Or a template file
   templateFile: 'relative/path/to/template',
   // Provide the single resulting file path
   outFile: 'built/data/exported.json',
   // Or provide a method to allow writing multiple files
   outFiles: string | (envoy: SwigEnvoy, state: IBuildState, data: any): Promise<void>
   outFiles: 'relative/path/to/file.js'
}

outFiles

string

If passed as a string, it's the path to a .js file with a single exported function with the signature: (envoy: SwigEnvoy, state: IBuildState, data: any): Promise<void>

function

A functionw ith the signature: (envoy: SwigEnvoy, state: IBuildState, data: any): Promise<void>

forge.js

module.exports = {
   plugins: [
      { name: 'swig', plugin: new SwigPlugin() },
      { name: 'json', plugin: new JsonPlugin() }
   ],
   transforms: {
      swig: {
         steps: [
            {
               alias: 'files',
               plugin: 'json',
               paths: [
                  'path/to/files/**/*.json'
               ]
            },
            {
               alias: 'xform',
               plugin: 'swig',
               use: 'files',
               options: {
                  // Swig Options
               },
               // Inline template
               template: `{{ obj | json(2) }}`,
               // Or specify a template file
               templateFile: 'path/to/file.template',
               // Specify a resulting file path
               // You can still use this transformed data in another stream
               outFile: 'path/to/rendered/file.json'
            }
         ]
      }
   }
}

Exports API

The Swig plugin applies data from a given source, and applies it to a Swig template. This plugin does not support an import option.

Besides the alias, plugin, and use parameters, the plugin also supports:

• template {string} : An inline template string. Mutually exclusive with the templateFile option.
• templateFile {string} : A relative path to the template file. Mutually exclusive with the template option.
• out {string, optional} : A relative path to the file to export the rendered text to.
• All other options defined in SwigOpts

If both the template and templateFile options are set, the template parameter takes precendence.

Envoy API

The following methods are exposed on the Swig Envoy:

setTemplateContext(context: any)

Sets the context object for the Swig template

• context : The context object used when rendering

setTemplate(template: string)

Sets the Swig template string. Mutually exclusive with setTemplateFile()

• template : The template string

setTemplateFile(filePath: string)

Sets the template file used. This is mutually exclusive with setTemplate(). If both are set, the template string takes precendence.

• filePath : Relative path to the template file.

setOutFile(filePath: string)

Sets the out file path. If set, the plugin will export the rendered text to a file.

• filePath : Absolute or relative path to the resulting file

setSwigOptions(options: any)

Sets any additional SwigOpts

• options : The Swig options.

Example

function beforeExport(state) {
   let { exports } = state

   // Inline template string
   let swig = exports.create('swig')
   swig.setTemplateContext({ say: 'Hey There!' })
   swig.setTemplate(`<h1>{{ say }}</h1>`)
   exports.commit(swig)

   // Template file
   swig = exports.create('swig')
   swig.setTemplateContext({ say: 'Hey There!' })
   swig.setTemplateFile('relative/path/to/template/file.template')
   exports.commit(swig)

   return Promise.resolve()
}

Build Record

For each item exported, a record is kept. The plugin stores the following information:

• template : This is set if an inline template was used
• templateFile : This is set if a template file was used for the template. This is the absolute path to the file.
• context : The local context used when rendering the template
• rendered : The rendered text