Script create-my-links #bash

create-my-links

#!/usr/bin/env bash
set -eou pipefail

! [[ `uname` = Darwin ]] || {
    command -v greadlink &> /dev/null || {
      echo "Install greadlink! ($ brew install coreutils)"
      exit 1
    }
    readlink() { greadlink "${@:-}"; }
}
BASE_DIR=`dirname "$(readlink -m "$(which "$0")")"`
source ~/.create-my-links 2>&- || :
ORIGIN_DIR=${ORIGIN_DIR:-/mnt/pj}
MY_LINKS_FILE=${MY_LINKS_FILE:-$HOME/.my-links}

field() { cut -d'|' -f$1 <<< $2; }

remove-link() { rm -f ~/"$1"; }

create-link() {
	local link=$1; shift
	[ -e "$link" ] && {
		[ "${@:-}" ] && {
			rm -f "${@##*/}/$link"
			ln -sf "$link" "$@" 
		} || {
			rm -f "${link##*/}"
			ln -sf "$link"
		}
	} || {
		echo "Link \"$link\" could no be read!" >&2
	}
}

link-not-created() {
	echo "A link to \"$1\" could not be created in \"$2\"! Directory \"$3\" does not exists!"
}

create=true
while getopts ":ro:" opt
do
	case $opt in
		r) create=false;;
		o) ORIGIN_DIR=$OPTARG;;
		:) echo "Option \"-$OPTARG\" requires an argument!" >&2;;
		\?)
			echo "Usage: $0 [-r] [-o] \"origin-dir\"" >&2
			exit 0
			;;
	esac
done
shift $((OPTIND -1))

[ -e "$MY_LINKS_FILE" ] || {
	echo "File \"$MY_LINKS_FILE\" does not exists! Linking it to \"${BASE_DIR#$HOME/}/my-links\" ..."
	(cd; ln -sf "${BASE_DIR#$HOME/}"/my-links .my-links)
}

while IFS= read -r link
do
	link=$(echo -n $link)
	[ ! "$link" ] || [[ "$link" =~ ^# ]] && continue
	[[ "$link" =~ '|' ]] && {
		target=`field 2 "$link"`
		link=`field 1 "$link"`
		[[ "$link" =~ '/' ]] && {
			$create && (cd ~/"${link%/*}" 2>&- && create-link ~/"$target" "${link##*/}" ||
				link-not-created "~/$target" "~/${link%/*}" "${link%/*}") || remove-link "$link"
		} || {
			$create && (cd; create-link "$target" "$link") || remove-link "$link"
		}
	} || {
		$create && {
			[ -d "$ORIGIN_DIR" ] || {
				link-not-created "$ORIGIN_DIR/$link" "~" "$ORIGIN_DIR"
				continue
			}
			(cd; create-link "$ORIGIN_DIR/$link")
		} || remove-link "$link"
	}
done < "$MY_LINKS_FILE"

my-links

# Configuration file used by the script "create-my-links".
# Copy it to "$HOME/" and configure it as your needs.

# "Origin links" (links to existing directories in $ORIGIN_DIR and created inside $HOME):
.m2
cs
labs
tmp
My Projects
Projects

# "Local links" (links to "Origin links" or to other existing "Local links"):
log|My Projects/github.com/log
Desktop/log|log

# vim: syntax=off