# Gulp AMP HTML script importer
A Gulp plugin for automating the import of required `custom-element` `` tags in [AMPHTML files](https://ampproject.org).
## Installation
Install package with NPM and add it to your development dependencies:
```
npm install --save-dev amphtml-autoscript
```
## Usage
1. Add placeholder to your source files:
```html
${ampjs}
Hello, amphtml-autoscript!
```
2. Incorporate the package in your gulpfile:
```js
const autoScript = require('amphtml-autoscript').create();
gulp.task('tag', () => {
return gulp.src('*.html')
.pipe(autoScript())
.pipe(gulp.dest('dist/'));
});
```
3. Generated AMP HTML now includes any required `custom-element` `` tags:
```html
Hello, amphtml-autoscript!
```
### Options
Options can be passed to `.create(options)` to change the operation in the following ways:
```javascript
{
// Alternative placeholder to replace, e.g. [AMPJS], ${ampjs}, <>
placeholder: '...',
// Mode to operate in, either autoScript.MODES.PLACEHOLDER or autoScript.MODES.HEADER_INSERTION
// either replacing a string, or placing the elements at the end of the tag.
mode: autoScript.MODES.,
// Force the update of the AMP components map, which will otherwise not be fetched again.
updateComponentsMap: true,
// Force use of 'latest' for all components
forceLatest: true
}
```
### Local component version overrides
Under normal operation, the component version will be read from `components.json`, part of the
module. This will not update unless forced using the options above.
To specify a version local to your project, create a `amp-versions.json` file
in your build working directory, specifying desired versions e.g.
```json
{
"amp-carousel": "0.2"
}
```
NOTE: versions in `amp-versions.json` will take precedence over `forceLatest`.
## Release Notes
### 1.5.2
* Updated to reflect changes in amphtml-validator error category reporting.
### 1.5.1
* Updated version dependencies.
### 1.5.0
* Added `forceLatest` and local component versions override.
### 1.4.0
* Added file to store snapshot of component versions.
### 1.3.1
* Fixed bug in callback usage that caused stream write errors
### 1.3.0
* Moved to using validator.
* Added `HEADER_INSERTION` mode.