Add a new revision of bootstrap script

bootstrap.sh

@@ -0,0 +1,172 @@
+#! /bin/bash
+#
+# bootstrap
+# General-purpose home directory bootstrap script
+# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
+#
+# Distributed under terms of the MIT license.
+#
+set -e
+
+# Read-only set-once variables
+declare -r _name="$(basename -- "$0")"
+# Options
+declare -i _opthelp
+declare -i _optverbose
+declare _optdest="$HOME"
+declare _optgitdir=".dotfiles"
+declare _optrepo="git@git.9iron.club:salt/home"
+# Working variables
+declare -a _args
+declare _return
+
+# Helper functions
+log() {
+	# Print a line to the terminal if _optverbose is greater than $2
+	# $2 defaults to 0
+	# loglevel 0: Daily-use messages
+	# loglevel 1: Detailed but not quite debugging
+	# loglevel 2: Definitely debugging
+	[ -z "$1" ] && return 1
+	if (( _optverbose >= ${2:-0} )); then
+		printf "%s\\n" "$1"
+	fi
+}
+warn() {
+	# Print a yellow line to the terminal, respecting _optverbose
+	[ -z "$1" ] && return 1
+	if (( _optverbose >= ${2:-0} )); then
+		if [ -t 1 ]; then
+			printf "\\e[33m%s\\e[0m\\n" "$1"
+		else
+			printf "WARN: %s\\n" "$1"
+		fi
+	fi
+}
+error() {
+	# Print a red line to the terminal, exit if $2 is specified
+	[ -z "$1" ] && return 1
+	if [ -t 2 ]; then
+		printf "\\e[31m%s\\e[0m\\n" "$1" 1>&2
+	else
+		printf "ERROR: %s\\n" "$1" 1>&2
+	fi
+	[ -z "$2" ] && return
+	exit "${2:-1}"
+}
+has() {
+	# Parse out all arguments and try to find them in path
+	# If an argument cannot be found, set _return and fail
+	for prog in "$@"; do
+		if ! command -v "$prog" > /dev/null 2>&1; then
+			_return="$prog"
+			return 1
+		fi
+	done
+	return 0
+}
+
+# Helper functions
+cleanup() {
+	[ -z "$1" ] && warn "No argument passed to cleanup"
+	rm -rf "$1" || warn "Failed to remove $1: $?"
+}
+
+# Core program functions
+printhelp() {
+	cat << EOF
+Usage: $_name [OPTION]...
+
+  -d			Bootstrap directory. Defaults to ~
+  -h			Print this help text
+  -r			Repository. Defaults to git@git.9iron.club:salt/home
+  -v			Print more status messages. Stacks
+
+Copyright (c) 2020 rehashedsalt@cock.li
+Licensed under the MIT license
+EOF
+}
+build-home() {
+	# Build a home directory
+	local repo="$_optrepo"
+	local dest="$_optdest"
+	log "Using remote repository $repo" 2
+	log "Using destination $dest" 2
+
+	# Build a skeleton folder layout
+	log "Building skeleton folder layout"
+	pushd "$dest" > /dev/null 2>&1
+	mkdir Desktop Documents Downloads Music Pictures Projects Public Templates Videos || warn "Error creating skeleton folder layout"
+	chmod 775 Public || warn "Error making directory Public world-accessible"
+	popd > /dev/null 2>&1
+
+	# Clone our repo into a temporary directory
+	log "Cloning repository into temporary directory"
+	local tmpdir="$(mktemp -d "tmp.$USER.$_name.XXXXXXXX" --tmpdir )"
+	trap "cleanup $tmpdir" EXIT
+	pushd "$tmpdir" > /dev/null 2>&1
+	git clone \
+		--recursive \
+		--depth 50 \
+		--separate-git-dir="./$_optgitdir" \
+		"$repo" \
+		"$tmpdir" > /dev/null 2>&1
+	popd > /dev/null 2>&1
+
+	# Sync the temporary directory over
+	log "Moving cloned repository into destination"
+	rsync -rl "$tmpdir/" "$dest/"
+}
+
+# Main
+main() {
+	# Parse out arguments
+	while [ -n "$1" ]; do
+		# Parse out flags
+		while getopts ":c:d:hr:v" opt; do
+			case $opt in
+				d)
+					_optdest="$OPTARG"
+					;;
+				h)
+					_opthelp=1
+					;;
+				r)
+					_optrepo="$OPTARG"
+					;;
+				v)
+					_optverbose+=1
+					;;
+				:)
+					error "Option requires argument: -$OPTARG" 2
+					;;
+				*)
+					error "Invalid option: -$OPTARG" 2
+					;;
+			esac
+		done
+		# Store arguments
+		shift $((OPTIND - 1))
+		if [ -n "$1" ]; then
+			_args+=("$1")
+			shift
+		fi
+		unset OPTIND
+	done
+	# Early hook for help
+	[ -n "$_opthelp" ] && printhelp && exit 0
+	# Validate critical options
+	# TODO: That
+	# Validate core program dependencies
+	log "Validating dependencies" 2
+	if ! has basename git mktemp rsync; then
+		error "Failed to find program: $_return" 1
+	fi
+
+	# Do the do
+	build-home
+	exit 0
+}
+
+main "$@"
+