Piotr1215

Nvim Events

Nvim recognizes the following events. Names are case-insensitive.

BufAdd

Just after creating a new buffer which is
added to the buffer list, or adding a buffer

Piotr1215

Command	Description
:autocmd	Lists all currently defined auto commands in Neovim.
:autocmd {event}	Shows auto commands for a specific event (e.g., BufWritePost).
:verbose :autocmd {event}	Provides detailed information about auto commands for a specific event
:augroup {group} | autocmd | augroup END	Displays all auto commands within a specific group.
:autocmd * {pattern}	Lists all auto commands that match a specific pattern (e.g., *.lua).
Telescope autocommands	Lists all auto commands and fuzzy find.

Piotr1215

Command	Description
:%s/old/new/g	Replace all occurrences of 'old' with 'new' in the entire file
:s/old/new/g	Replace all occurrences of 'old' with 'new' in the current line
:s/\Cold/new/g	Case-sensitive replace of 'old' with 'new' in the current line
:s/\v(\d+)-(\d+)/\2-\1/g	Swap two groups of digits separated by a hyphen in the current line
:g/^$/d	Delete all empty lines in the file
:g/pattern/norm gU$	Convert matching lines to uppercase
`:argdo %s/old/new/gc	update`

Piotr1215

#!/usr/bin/env bash

# The set -e option instructs bash to immediately exit if any command has a non-zero exit status
# The set -u referencing a previously undefined variable - with the exceptions of $* and $@ - is an error
# The set -o pipefaile if any command in a pipeline fails, that return code will be used as the return code of the whole pipeline
# https://bit.ly/37nFgin
set -o pipefail

help_function() {
	echo "Usage: __open_file.sh [query] [-h|--help]"

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function _G.yank_matching_lines()
  local search_pattern = vim.fn.getreg('/')
  if search_pattern ~= '' then
    local matching_lines = {}
    for line_number = 1, vim.fn.line('$') do
      local line = vim.fn.getline(line_number)
      if vim.fn.match(line, search_pattern) ~= -1 then
        table.insert(matching_lines, line)
      end
    end

Piotr1215

! this should be highlighted !

Piotr1215

How to keep cluster connections cleanly separated

With time the .kube/config file will contain a mix of dev, test and prod cluster references. It is easy to forget switching off from a prod cluster context and make a mistake and run for example kubectl delete ns crossplane-system.

Direnv based setup

Use the following setup to avoid these kinds of errors and keep clusters separate.

Install direnv

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#!/usr/bin/env bash

# Find a repo for my user and cd into it, clone and cd if not found on disk
function repo() {
    # If repo name not provided, prompt for it rather than error out
    if [[ -z "$1" ]]; then
        export repo=$(ghs -u Piotr1215 | sed 's:.*/::')
    else
        export repo=$(ghs -u Piotr1215 $1 | sed 's:.*/::')
    fi

Piotr1215

# Detect operating system in Makefile.
# Author: He Tao
# Date: 2015-05-30

OSFLAG 				:=
ifeq ($(OS),Windows_NT)
	OSFLAG += -D WIN32
	ifeq ($(PROCESSOR_ARCHITECTURE),AMD64)
		OSFLAG += -D AMD64
	endif

Piotr1215

Setting up K3s

Katacoda scenario

General purpose Ubuntu 20.04 Instance

Download and install

curl -sfL https://get.k3s.io | sh -