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Recreate pruned docker networks with docker-compose

So here is nice chain of docker errors and its solution.

1. Docker has reached its maximum of created networks and errors like this:

ERROR: could not find an available, non-overlapping IPv4 address pool among the defaults to assign to the network

The easiest (and most brute though) solution to this is to prune all networks, as suggested here on SO.

docker network prune

This will delete all networks that are not connected to currently active containers.
But this also means it will delete all networks of your not runnning dev projects.
(Which might be numerous as in my case.)

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Migrating from gulp to esbuild

Esbuild is the new cool kid in the bundler world.
It is super fast since its written in Go and comes with a lot of builtin features for modern frontend development.

So i wanted to try it myself and migrated a former gulp build to esbuild.

But as it showed the gulp build was not so modern, as it was just Sass and Javascript minification. No ES6, No React, no JSX with inline styles.

So Esbuild was not working out of the box but needed some extra config and the Sass plugin.

npm i -d esbuild esbuild-plugin-sass

Also I had to rewrite the Javascript to use ES6 modules, but this was fortunatly easy.

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Passing a boolean to the constructor of “Symfony\Component\Dotenv\Dotenv” is deprecated

You might encounter this deprecation message after your upgrade to symfony 5.1 in your symfony project:

Since symfony/dotenv 5.1: Passing a boolean to the constructor of “Symfony\Component\Dotenv\Dotenv” is deprecated, use “Dotenv::usePutenv()

To fix this, go to config/bootstrap.php and remove the false from the Dotenv constructor:
(new Dotenv(false))->loadEnv(dirname(DIR).'/.env');
to
(new Dotenv())->loadEnv(dirname(DIR).'/.env');
See: https://github.com/symfony/symfony/issues/37195

Actually the file config/bootstrap.php has been removed from symfony 5.1 and was replaced in public/index.php.

But since the project was updated from an symfony 4 version the bootrap file is still present.

So another option would be to remove the boostrap file and update the project entirely to symfony 5.1 recipe.
This is not trivial though as you can see in this corresponfing PullRequest.

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EU/VAT – Mehrwertsteuer Madness

Calculating European VAT Rates with PHP – the easy way.

Disclaimer: No legal advice, just a little experience report.

If you sell digital things (services, digital goods etc.) to EU countries, you might have to calculate the VAT at the rate of the customer’s country (and even pay it there afterwards).
The latter is even the more inconvenient part, but at least the first part can be done quite easily with good old PHP.

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Docker-compose and Unknown MySQL server host

In case you encounter this error with mysql and your docker-compose setup:

Unknown MySQL server host <mysql-service-name>Code language: HTML, XML (xml)

… and you dont know why because everything seems to be correct.

Then you might have an upgrade problem with mysql because you are reusing an old volume that was created for another mysql version.
This can happen when you use a unspecified tag as mysql:latest (not recommended anyway) and there was a version bump in the official mysql image.
Or you upgraded the mysql container yourself, f.e. from mysql:5.6 to mysql:5.7 and you are reusing the data volume with the mysql files.

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Psalm Static Analyzer fails with Symfony’s builtin preloading file

So i updated a symfony app the other day to version 5.1.6 and suddenly the static code analyzer psalm ran appearently in an hangup loop and never terminated.

After some investigation it showed that symfony added a .preload.php file to the src directory to enable the new PHP7.4 preloading feature.

Unfortunatly psalm parsed this file and followed all includes.
This took it so long that i took it for an endless loop.

There is some discussion in symfony github issues about this and the conclusion was to replace src/.preload.php with config/preload.php which happens now in a recipe.

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Umlaut domain problems

Living in an umlaut country like Germany umlaut domains are sometimes requested.
But: Umlaut domains resp. Internationalized Domain Names (IDN) are problematic.

My main pain points were these:

  1. Browsers tend to convert the unicode representations to ASCII Compatible Encoding (ACE) with punycode representations for security reasons when copying the url.
    So you will get a nice surprise when pasting the url somewhere:

F.e. having https://hürth-blüht.de/ in the browsers address bar will get you https://xn--hrth-blht-q9ag.de/ on copy/paste.
This punycode representation is very unfamiliar to normal users and will keep them from clicking the url because it looks suspicious.

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Updating OXID eShop to 6.2.0

Oxid eShop 6.2 is released and its a good step forward to a modernized codebase, embracing best practices and more symfony-like patterns.

Since i do a lot of coding with symfony besides OXID i was very exited about this new version. So i gave it a try and updated one of the shops i maintain. (Its not public yet, i will update this post once we launch, Its launched by now, yay: https://www.cafelehmitz-photobooks.com/).

I basically followed this upgrade guide: https://docs.oxid-esales.com/eshop/de/6.2/installation/update/von-6.1.x-auf-6.2.0-aktualisieren.html

So here is my experience updating OXID eShop 6.1.5 to 6.2.0:

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