dotfiles/install.sh at master · mafrosis/dotfiles · GitHub

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#! /bin/bash

usage='Usage: ./install.sh [-n] [-f] app1 [app2 app3 ..]

  -n   dry-run; no filesystem changes
  -f   force overwrite of existing symlinks'

# DEBUG mode controlled by env var
if [[ -n $DEBUG ]]; then set -x; fi

DRY_RUN=0
FORCE=0

while getopts 'nf' opts
do
	case $opts in
		n ) DRY_RUN=1;;
		f ) FORCE=1;;
		* ) echo "$usage"
			exit 1;;
	esac
done
shift $((OPTIND-1))


if [[ -z $TERMUX_VERSION ]] && [[ $(id -u) -gt 0 ]] && ! command -v sudo >/dev/null 2>&1; then
	echo 'Please install sudo and try again'
	exit 44
fi

# retrieve all repo submodules
git submodule update --init --recursive

source ./lib.sh

# ensure curl is available
if ! command -v curl >/dev/null 2>&1; then
	if [[ $(uname) == 'Darwin' ]]; then
		brew install curl
	elif [[ -n $TERMUX_VERSION ]]; then
		pkg install curl
	else
		sudo apt-get install -y curl
	fi
fi

# ensure stow is available
if ! command -v stow >/dev/null 2>&1; then
	if [[ $(uname) == 'Darwin' ]]; then
		brew install stow
	elif [[ -n $TERMUX_VERSION ]]; then
		pkg install stow
	else
		sudo apt-get install -y stow
	fi
fi

function delete_symlinks {
	for filename in $1; do
		if [[ -f $HOME/$filename || -L $HOME/$filename ]]; then
			echo "Deleting file $HOME/$filename"
			if [[ $DRY_RUN -eq 0 ]]; then
				rm -f "$HOME/$filename"
			fi
		fi
	done
}

for app in "$@"
do
	if [[ ! -d $app ]]; then
		echo "Subdirectory $app does not exist!"
		continue
	fi

	if [[ $FORCE -eq 1 ]]; then
		# forcefully delete any conflicts in stow
		IFS=$(echo -en "\n\b")

		# check stow version
		VERSION=$(stow -V | awk '/stow/ {print $5}')
		if [[ ${VERSION:0:1} -eq 1 ]]; then
			# v.1.3.3
			# parse stow's conficts
			CONFLICTS=$(stow -c "$app" 2>&1 | awk '/CONFLICT/ {print $4}')
			delete_symlinks "$CONFLICTS"
		else
			# v2.2.0
			# remove existing symlinks
			# remove files which would be replaced with symlinks
			# remove symlinks which belong to other packages (which may cause trouble later but ho hum)
			CONFLICTS=$(stow -nv "$app" 2>&1 | awk '/\* existing target is/ {print $NF}')
			if [[ -n $CONFLICTS ]]; then
				echo "$CONFLICTS"
				delete_symlinks "$CONFLICTS"
			fi
		fi
	fi

	# use per-app install.sh, or just symlink with stow
	if [[ -x $app/install.sh ]]; then
		source ./$app/install.sh
	fi

	# per-app install scripts can return 255 to indicate that the
	# stow step should be skipped here

	if [[ ! $? -eq 255 ]]; then
		# restow when force flag supplied
		if [[ $FORCE -eq 1 ]]; then RESTOW='--restow'; else RESTOW=''; fi
		if [[ $DRY_RUN -eq 1 ]]; then DR='-n'; else DR=''; fi

		# use stow to create symlinks in $HOME
		if ! stow -v --ignore='install.sh' --ignore='.md$' "$app" $RESTOW --target="$HOME" $DR; then
			if [[ $DRY_RUN -eq 0 ]]; then
				echo 'Stow returned a non-zero result. You may want to re-run with -f (force)'
			fi
		fi
	fi
done