Olivier Mengué dolmen

The content of a Go slice can be explored beyond its len, up to its cap.

A good reason for not exposing slices beyond their length and use "full slices expressions" to constrain the capacity when exposing internal data.

Automated go-redis v8 -> v9 migration

About v8 -> v9

https://redis.com/blog/go-redis-official-redis-client/

Usage:

curl https://gist.githubusercontent.com/dolmen/9f5b4b1892588a5a8948a7c8e116660b/raw/dafeeb86c5c1c1fe80499b0c652f218c3c69aebd/migrate-go-redis-v9.sh | bash

Advent Of Code 2022

Day 1

Go template

@dolmen
- Part 1 (Go): https://go.dev/play/p/C7hbiSq5Hcj
- Part 2 (Go): https://go.dev/play/p/_O5Uamo34hG
Part 2 (Go, v2 storing only top 3 loads): https://go.dev/play/p/XG2fDnGtVD-

Go text/template hacks

Hacks below use goproc to experiment with Go templates from the command-line.

Convert bool to int

$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} =&gt; {{index "....\001\000" (len (print .))}}{{"\n"}}'

github-go-version

Usage

github-go-version <owner>/<repo> <commit>

	# https://ghostty.org/docs/config/reference#window-inherit-working-directory
	window-inherit-working-directory = false
	# https://ghostty.org/docs/config/reference#working-directory
	working-directory = home

	# Start zsh as a login shell
	# https://ghostty.org/docs/config/reference#initial-command
	initial-command = /usr/bin/zsh -l
	command = /usr/bin/zsh -l

	#!/bin/bash

	# Commands to evaluate impact of xz installed via homebrew.
	# Author: Olivier Mengué.

	# Show info about xz bottle:
	brew info xz

	# Upgrade xz:
	brew update

	<html>
	<head>
	<meta http-equiv="refresh" content="0; url=https://github.com/" />
	</head>
	<body>
	</body>

	/*
	kh-to-hashcat allows to convert an OpenSSH known_hosts hashed file to a
	format that can be used with hashcat to recover hosts.

	Note that as the know_hosts file usually contains multiple keys for each host
	it is wise to filter the file to a single key type to filter redundant hashes.
	Check this stat:

	perl -nE '$c{$1}++ if /^\\|1\\|[^ ]+ ([^ ]+)/;END{say "$_: $c{$_}" for keys %c}' ~/.ssh/known_hosts

	# git go-version: shows the Go-modules versionning formatting of a Git commit
	git config --global alias.go-version '!f(){ cd -- "${GIT_PREFIX:-.}"; TZ=UTC git log -1 '\''--date=format-local:%Y%m%d%H%M%S'\'' --abbrev=12 '\''--pretty=tformat:v0.0.0-%cd-%h'\'' "$@" ;};f'
	# git go-get: shows the command to run on another Go project to upgrade this module
	git config --global alias.go-get '!f(){ cd -- "${GIT_PREFIX:-.}"; TZ=UTC git log -1 '\''--date=format-local:%Y%m%d%H%M%S'\'' --abbrev=12 '\''--pretty=tformat:go get '\''"$(go list -m)"'\''@v0.0.0-%cd-%h'\'' "$@" ;};f'
	# git go-shortlog: shows the 10 commits in Go-modules versionning style
	git config --global alias.go-shortlog '!f(){ cd -- "${GIT_PREFIX:-.}"; TZ=UTC git log -10 '\''--date=format-local:%Y%m%d%H%M%S'\'' --abbrev=12 '\''--pretty=tformat:v0.0.0-%cd-%h %s'\'' "$@" ;};f'