A simple caching wrapper for PHPSass - does not take into account changes in files referrred to from @include. Assumes that the PHPSass library is located in a directory at ./phpsass Assumes it can write to a directory called ./phpsass_cache, or create it.

SassCache.php

<?php

function compileSass($filename, $cached = true) {
    $cache_dir = './phpsass_cache';

    # if cached, ensure we can write to the cache directory
    if ($cached) {
        if (!file_exists($cache_dir) && !mkdir($cache_dir)) {
            throw 'SASS cache directory does not exist and cannot be created';
        }
        if (!is_writable($cache_dir)) {
            throw 'SASS cache directory is not writable';
        }
    }

    # have to check + throw here for the hashing
    if (!file_exists($filename)) {
        throw 'Filename requested for compilation did not exist';
    }

    # create a unique filename based on the contents of the included file
    $contents = file_get_contents($filename);
    $hash = md5($contents);
    $cache_filename = $cache_dir . '/' . $hash . '_' . basename($filename);

    # if we have a cache hit, return it now.
    if ($cached && file_exists($cache_filename)) {
        return file_get_contents($cache_filename);
    }

    # no cache hit, so compile as usual
    require_once './phpsass/SassParser.php';
    $syntax = substr($file, -4, 4);
    $options = array(
        'style' => 'expanded',
        'cache' => false, # yes, this is ironic
        'syntax' => $syntax,
        'debug' => false
    );
    $parser = new SassParser($options);
    $contents = $parser->toCss($filename);

    # save to cache
    if ($cached) {
        file_put_contents($cache_filename, $contents);
    }

    return $contents;
}

SassCacheMtime.php

<?php

function compileSass($filename, $cached = true) {
    $cache_dir = './phpsass_cache';

    # if cached, ensure we can write to the cache directory
    if ($cached) {
        if (!file_exists($cache_dir) && !mkdir($cache_dir)) {
            throw 'SASS cache directory does not exist and cannot be created';
        }
        if (!is_writable($cache_dir)) {
            throw 'SASS cache directory is not writable';
        }
    }

    # have to check + throw here for the hashing
    if (!file_exists($filename)) {
        throw 'Filename requested for compilation did not exist';
    }

    # create a unique filename based on the contents of the included file
    $contents = file_get_contents($filename);
    $cache_filename = $cache_dir . '/' . basename($filename);

    # if we have a cache hit, return it now.
    if ($cached && file_exists($cache_filename)) {
        $source = filemtime($filename);
        $target = filemtime($cache_filename);
        if ($target >= $source) {
            return file_get_contents($cache_filename);
        }
    }

    # no cache hit, so compile as usual
    require_once './phpsass/SassParser.php';
    $syntax = substr($file, -4, 4);
    $options = array(
        'style' => 'expanded',
        'cache' => false, # yes, this is ironic
        'syntax' => $syntax,
        'debug' => false
    );
    $parser = new SassParser($options);
    $contents = $parser->toCss($filename);

    # save to cache
    if ($cached) {
        file_put_contents($cache_filename, $contents);
    }

    return $contents;
}

I've added a second file which uses mtime instead of hashing for recompiling on save and cache naming.

Hi Rich,

sorry for waiting, i have a lot of trouble last week.
This week doesn't look better, but i taked some minutes to test your code.
Now the cache-method works, and i do a small change in https://gist.github.com/aspross/5870297.
I renamed the cache files in ".css" instead of ".sass".

I hope to find time this week to look for a solution on the include problem.
I want to generate a css file for every imported sass-file.

If you have an idea to solve it, i will be very happy.

Hi Rick,

i added a few changes on the code.
See on https://gist.github.com/aspross/5937524.

Now, i'm able to compile imports.
But my problem now, is when i do changes on an import like layout.sass,
example : @import url("/tmp/sass/layout.sass"). ( content from style.sass)

I didn't update my layout.css.

Only if my main css file called style.sass have any changes, i compiled my imports.

I make a comment on the place i think we have to check the import changes :
// Check the imports in $filename
// if changes on importfiles, replace the import files

Maybe you have any ideas to solve it.

Hi Rich,

good news, i found a solution.
You can found it on https://gist.github.com/aspross/5941082.

Now it will recompile the sass files, if i make any changes on an import sass file.

I know i can probably improve the code, but for now i think it's ok.
Me and my cousin have to test this script to find eventually errors.

Maybe you can test it too and give some feedback ;)