test

#!/bin/bash

tests=(
	'tldr -h'
	'tldr tar'
	'tldr abcdefg'
	'tldr git config'
	'tldr --list'
)

if [ "$TLDR_NETWORK_TESTS" = "true" ]; then
	tests+=(
		'tldr -u; printf "Update exit code: %d\n" $?'
	)
fi

run_all() {
	target=$1
	shift

	ln -sf "$target" .tldr-ephemeral-runner

	for t in "$@"; do
		./${t/tldr/.tldr-ephemeral-runner} 2>/dev/null
	done

	rm .tldr-ephemeral-runner
}

expected=$(run_all ./tldr "${tests[@]}")

test_shell() {
	shell=$1
	tldr=./.tldr--$shell

	shellPath="$(command -v $shell)"
	if [ -z "$shellPath" ]; then
		false
		return
	fi

	# the next line is, y'know, annoying, but it's a reliable way to
	# guarantee we run under that shell
	sed "1s:#!/bin/bash:#!$shellPath:" ./tldr >$tldr
	chmod +x $tldr
	result=$(run_all $tldr "${tests[@]}")
	rm $tldr

	if [ "$result" != "$expected" ]; then
		diff -U 0 <(echo "$expected") <(echo "$result") |
			tail +4 >fail-$shell.log

		false
	else
		true
	fi
}

test_shells() {
	fmt="%s\t%s\n"
	for shell in "$@"; do
		if test_shell $shell; then
			printf $fmt $shell PASS
		else
			printf $fmt $shell FAIL
		fi
	done
}

# On Debian based distros, most of these shells can be installed via:
# sudo apt install csh tcsh bash dash ksh zsh
# `gosh` is written in Go, and can be installed using:
# go install mvdan.cc/sh/v3/cmd/gosh@latest

test_shells sh bash dash zsh ksh csh tcsh gosh