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std::print - C++ Print formatter

• To use std::print need g++-14 and compile with -std=c++23.

  sudo apt install g++-14
  sudo rm /usr/bin/g++
  sudo ln -s /usr/bin/g++-14 /usr/bin/g++

g++ -std=c++23 print_me.cpp -o print_me

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Emscripten

• Clone and install SDK
  • save $EMSDK as environment var in your .profile/.zprofile/.bashrc/zshrc to make it easier later
  • install will run for a long time

git clone --depth=1 --recurse-submodules --shallow-submodules https://github.com/emscripten-core/emsdk.git
cd emsdk
export EMSDK=$(pwd) # save in you .profile or .bashrc/.zshrc
$EMSDK/emsdk install --shallow sdk-main-64bit # this takes a long time

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Let's Encrypt Certbot

sudo apt update
sudo apt install python3 python3-venv libaugeas0
# remove if installed from package manager, use python version
# sudo apt-get remove certbot
sudo python3 -m venv /opt/certbot/
sudo /opt/certbot/bin/pip install --upgrade pip
sudo /opt/certbot/bin/pip install certbot certbot-nginx

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Termux Config

Install Termux from F-Droid.

Update and install useful packages.

pkg update
pkg upgrade
pkg install openssh
pkg install iproute2

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Ollama OpenWebUI Raspberry Pi

• Install Ollama

curl -fsSL https://ollama.com/install.sh | sh

• Install the models

ollama run deepseek-r1:1.5b
ollama stop deepseek-r1:1.5b

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SQL Custom Script

Set the environment variable DB_PASS. It will briefly create a temp file, execute it and load the password as PSSQL variable. The file is deleted.
Then, connect to the DB and run custom.sql.

set DB_PASS=secret
sqlplus /nolog @run_custom.sql

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CMake print all variables matching pattern

Helper function that prints all variables matching pattern

function(print_cmake_variables_matching pattern)
    get_cmake_property(_variableNames VARIABLES)
    string(TOLOWER "${pattern}" pattern_lower)
    foreach (_variableName ${_variableNames})
        string(TOLOWER "${_variableName}" variable_lower)

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import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText


class Email:
    def __init__(self, from_: str, to: list[str], subject: str):

        self.from_ = from_
        self.to = to

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Git Tips

Hook: post-receive

I have a repo on my machine, MyApp, I have a Bare Git Repo on a remote server production at /home/userName/MyApp.
When pushing to remote production, I need to update the code in the actual location /var/www/MyApp, but it needs root/sudo permission.

In the bare repo, add file /home/userName/MyApp/hooks/post-receive. This file is always executed after a push.
The idea is to execute this:

#!/bin/bash

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Firefly III with Plaid Connector

A free and open source personal finance manager https://firefly-iii.org/

Documentation https://docs.firefly-iii.org/

Need to setup .env, .db.env and .importer.env before running docker compose.

The Importer is a separated web app (created by Firefly III) to support import of external files (CSV and other formats).
More details https://docs.firefly-iii.org/how-to/data-importer/installation/docker/