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Simple, quick way to concatenate, minify, and version static files in a Wordpress theme
# Filename-based cache busting
# taken from https://github.com/h5bp/html5-boilerplate/
# This rewrites file names of the form `name.123456.js` to `name.js`
# so that the browser doesn't use the cached version when you have
# updated (but not manually renamed) the file.
<IfModule mod_rewrite.c>
Options +FollowSymlinks
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)\.(\d+)\.(js|css|png|jpg|gif)$ $1.$3 [L]
</IfModule>
#!/bin/sh
# Run `bash build.sh` from within the theme's directory whenever
# you need to perform these tasks.
# A separate `watch.sh` script is better for continuous compilation
# of `.scss` files during development.
# Update any paths as needed. This example relies on all the theme's
# `.scss` files being in a `scss` directory, and all the `.js` files
# being in a `js` directory.
# Concatenate and minify the CSS
# Requires: Sass (Ruby)
END_CSS="style.css"
END_MIN_CSS="style.min.css"
SASS_COMMAND="sass --load-path scss --style"
$SASS_COMMAND expanded scss/style.scss:$END_CSS
$SASS_COMMAND compressed scss/style.scss:$END_MIN_CSS
echo "SCSS-to-CSS build compilation successful"
# Concatenate all JS files to into `site.js`
# Explicitly name and order the files if needed
cat js/*.js > js/site.js
echo "JS concatenation successful"
# Minify the combined JS
# Requires: UglifyJS (Node)
uglifyjs --output js/site.min.js js/site.js
echo "JS uglification successful"
exit 0
<?php
/*
* Check environment
*/
function is_prod() {
if ( home_url() == '<production-url>' ) {
return true;
}
else {
return false;
}
}
/*
* Basic file versioning
* Note: probably better to use `md5_file` instead of `filemtime`
* http://www.php.net/manual/en/function.md5-file.php
*/
function version($filename) {
// get the absolute path to the file
$pathToFile = TEMPLATEPATH . '/' . $filename;
//check if the file exists
if (file_exists($pathToFile)) {
$needle = '.';
// return the versioned filename based on the last modified time
$versioned = '.' . filemtime($pathToFile) . '.';
// the position of the last instance of '.'
$pos = strrpos($filename, $needle);
if ($pos !== false) {
// replace and return
return '/' . substr_replace($filename, $versioned, $pos, strlen($needle));
}
}
else {
// return the original filename
return '/' . $filename;
}
}
?>
<?php
// other code
// only reference the minified file in production
// version which ever file is referenced
is_prod() ? $cssfile = 'style.min.css' : $cssfile = 'style.css';
echo '<link rel="stylesheet" href="' . get_bloginfo('stylesheet_directory') . version($cssfile) . '">';
?>
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