PHP interface type hinting

In interfaces you can force the return type

interface InterfaceTest {
    function GetSingleEntity(): Entity;
    function GetEntitySet() : Entity[];
}

GetEntitySet should return a array containing Entities. But this kind of syntax is not allowed.
You could just change it to only return an array, but the forcing of the class is the most powerful.
The best is to create a wrapper class for the entities, best would be to use an Iterator.

sed command line tool

sed is not new for me. But it’s such a versatile tool. And I always have trouble finding the precice syntax I need. So here is a collection of examples. It probably will grow in the years.

Replace the home dir with ~.

COMPACT=$(echo ${HOME} | sed "s#${HOME}#~#g")

Replace %SALT% with the variable $SALT in the file wp-config.php

sed -i -E "s/%SALT%/$SALT/g"  "wp-config.php"

.gitignore recursively

Today -after a very frustrating hour- I found out git checks for .gitignore inside folders.

Folder tree example

  • .git (the root)
  • .gitignore
  • wp-content
    • themes
      • project
      • .gitignore (git also checks this one)
Posted in TIL

VVV provision single site

For the last month and a half I’ve started using vvv, and it works like a charm.
As I’m setting up a lot of sites I have to run provision a lot.
And that is quite a heavy operation in vvv because it pretty much checks every thing.

Luckily there is also a way to provision a single site.

vagrant provision --provision-with=site-example

Where site-example is the same as the site key in vvv-custom.yml.

wp cli output format with –porcelain

wp db export

Will output something like Succes: Exported to 'dbname-2018-09-16-2790c11.sql'
Often you need the filename.

--porcelain flag to the rescue!

wp db export --porcelain
dbname-2018-09-16-2790c11.sql

This will work on a lot of commands that have one item output.
Stuff like wp post create ....
Here is a complete list of commands that have the –porcelain flag

Commands that output more items usually have a --format flag to handle output.

Declare a variable to a bash script runtime

In the past I’ve did a post about checking if a bash argument is set.
This is different, This way you can pass through a named variable.

    TEST='pass it on' ./testscript.sh

If you do this $TEST will be set inside the ./testscript.sh bash script.
Like the normal arguments you probably would like to validate them inside the bash script.
The main plus side is that you can put arguments in any order and exclude arguments.
It might also be easier to read as you can see the arguments name.

A bit more advanced. You can override global variables for that script run.
Variables like $PWD and $PATH, be careful.

Example script: ./testscript.sh

#!/usr/bin/env bash

if [ ! -z $TEST ]; then
    echo "var is set to '$TEST'";
else
    echo "var is unset";
fi
Posted in TIL

Global git ignore

A new laptop a new change to optimize stuff. And this is one I should have done years ago.
There are files you always want to avoid. The infamous .DS_Store file comes to mind.

On ubuntu just add whatever you want to exclude to ~/.config/git/ignore

Posted in TIL

Copy files/folders over ssh

Sometimes you just want to copy files from a remote server, and you want it often and quick. Stuff like a DB dump.
You could startup your (s)ftp client and browse to it. Or you could just grap it with ssh.

Download one file

scp -user@hostname.com:/full/path/to/dump.xml /local/path/to/Downloads

Download a whole folder

scp -r user@hostname.com:/full/path/to/folder /local/path/to/Downloads

Composer based on path

I wanted to include one directory form an svn repo.
With help of stackoverflow I found the solution.

"require-dev": {
    "wordpress/phpunit": "*"
},
"repositories": [
    {
        "type": "package",
        "package": {
            "name": "wordpress/phpunit",
            "version": "1.0.0",
            "source": {
                "url": "https://develop.svn.wordpress.org",
                "type": "svn",
                "reference": "trunk/tests/phpunit/includes/@43534"
            }
        }
    }
]

There is a downside, it won’t update. Unless you up the version inside the repositories block.

Bash edit command

I like doing a lot in one command. Downside it that stuff can get messy. One big line. you can’t easily edit it.
A shortcut to make it easier is ctrl-x e That will open the current command in an editor.

Few thinks to keep in mind.

  • Multiple lines will work, but it will execute it as separate commands.
  • using && at the end of lines will fix that.
  • Which of course means you get it in the history at full.
    My main use to chain commands.