mvidner

str.  heslo
  39  Analogie                                      
  59  Bolzano                                       
 205  Budoucí matematik                             
 214  Co je neznámá?                                
  87  Definice pojmu                                
  77  Dekompozice a rekombinace                     
  94  Descartes                                     
  96  Diagnóza                                      
  74  Důsledek                                      

mvidner

#!/bin/sh
# put this to .git/hooks/pre-commit and make it executable
echo PRE-COMMIT HOOK:
set -x
# the repo Rust root is in a subdir
# TODO: skip all of this if there are no changes in that dir
cd rust
# as seen in .github/workflows/ci-rust.yml
cargo fmt --all -- --check

mvidner

#!/usr/bin/env ruby
# The Rust httpmock crate,
# https://docs.rs/httpmock/latest/httpmock/
# in the 0.7.0 version, when it logs the request, it shows the body as
# a numeric array of bytes.
# Make it readable.

# Input:

# [2024-08-23T08:22:33Z DEBUG httpmock::server::web::handlers] Could not match any mock to the following request: HttpMockRequest {

mvidner

#!/bin/sh
exec >> /var/log/YaST2/signal 2>&1
# pstree -pluna; but let's use the long options for clarity
pstree --show-pids --long --uid-changes --numeric-sort --arguments
sleep 10

mvidner

D-Bus Crash Course: Part 1

Goal for this part: learn enough to call a method.

How to read this:

☡ A Knuth-style Dangerous Bend sign ☡ precedes parts that should be skipped at first.

What is D-Bus?

mvidner

#!/usr/bin/env ruby
# frozen_string_literal: true
require "dbus"

# Complex property
class Test < DBus::Object
  dbus_interface "net.vidner.Scratch" do
    dbus_attr_reader :progress, "(stttt)"
  end

mvidner

<?xml version="1.0"?>
<productDefines xmlns="http://www.suse.com/1.0/yast2ns" xmlns:config="http://www.suse.com/1.0/configns">

<!--
Work around for the text domain
textdomain="control"
-->

    <textdomain>control</textdomain>

mvidner

#!/bin/sh
# Automate the password setting step from
# https://en.opensuse.org/Portal:MicroOS/Ignition
#
# 1. Ask for a password interactively.
# 2. Make an ignition.iso for setting root's password to that.
#    An existing ignition.iso will be overwritten.
#
# Required commands
#   openssl

mvidner

Massif Basics

Valgrind is an instrumentation framework that runs a program by simulating every instruction. It has several tools. Memcheck is the original one, used for detecting memory errors. Massif is a memory profiler.

(The output it produces, example: https://gist.github.com/mvidner/4e8ed01c7dabb648a50e0dd5f0fdcc62 )

The basic invocation of Massif is simple, valgrind --tool=massif my_program its_arguments, so for YaST

mvidner

--------------------------------------------------------------------------------
Command:            /usr/lib/YaST2/bin/y2start installation --arg initial qt
Massif arguments:   --massif-out-file=/var/log/YaST2/massif-%p.out
ms_print arguments: massif-4596.out
--------------------------------------------------------------------------------


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