Overview

Silverstripe instance with vips and a fork of focuspoint to provide an example how it fails / succeeds.

Installation

mkdir vanilla-vips
cd vanilla-vips
git clone https://github.com/lerni/vanilla-vips .
ddev start
ddev composer install

• Login to https://vanilla-vips.ddev.site/admin/pages with admin & password

• Create a FocusPointImagePage, upload an image & publish - all works fine

• Remove forked repositories (below) from composer.json and ddev composer update, flush, create a FocusPointImagePage again with a new image.

    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/lerni/silverstripe-focuspoint"
        }
    ],

You then see an error like:

[Emergency] Uncaught Jcupitt\Vips\Exception: libvips error: /var/www/html/silverstripe-cache/SOMEUSER/interventionimage_atzgPx.jpg: unable to open for read unix error: No such file or directory

The reason is that the temporary file is unlinked after the first operation but focuspoint chains multiple operations like $backend->resizeByWidth($width)->crop($cropOffset, 0, $width, $height);. See silverstripe/silverstripe-assets#539 (comment)

One way to work around is to clone $backend and call crop on the clone like in DBFocusPoint.php:

    public function applyCrop(Image_Backend $backend, array $cropData): ?Image_Backend
    {
        $width = $cropData['x']['TargetLength'];
        $height = $cropData['y']['TargetLength'];
        $cropAxis = $cropData['CropAxis'];
        $cropOffset = $cropData['CropOffset'];

        // Resize based on axis
        switch ($cropAxis) {
            case 'x':
                //Generate image
                $backend = $backend->resizeByHeight($height);
                $backendCopy = clone $backend;
                return $backendCopy->crop(0, $cropOffset, $width, $height);
            case 'y':
                //Generate image
                $backend = $backend->resizeByWidth($height);
                $backendCopy = clone $backend;
                return $backendCopy->crop($cropOffset, 0, $width, $height);
            default:
                //Generate image without cropping
                return $backend->resize($width, $height);
        }
    }

Another way would be to use streams. See: silverstripe/silverstripe-assets#527 It appears that intervention/image is currently under active development and the issue might be resolved at some point, but not in the near future with SS.

VSCode tasks - remember all the commands 💁

There are a bunch of tasks in .vscode/tasks.json available per Command+Shift+B:

• ddev start (magenta)
• ddev stop (magenta)
• ddev restart (magenta)
• composer update (magenta)
• composer vendor-expose (blue)
• ddev logs (magenta)
• flush (blue)
• flushh (blue - flush hard) instead of ddev exec rm -rf ./silverstripe-cache/*
• dev/build (blue) instead of ddev php ./vendor/silverstripe/framework/cli-script.php dev/build flush
• xdebug on / off (magenta)