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#!/usr/bin/env bash
SCRIPT="$(basename "$0")"
long='help,verbose,quiet,force,dry-run'
short='hvqfn'
eval set -- "$(getopt -o $short -l $long -n "$SCRIPT" -- "$@")"
help() {
cat <<-EOF
$SCRIPT
Toby Vincent <tobyv13@gmail.com>
$SCRIPT
Creates symbolic links (for files) or junctions (for directories) from the
windows filesystem to the WSL2 instance using mklink.exe.
USAGE:
$SCRIPT [OPTIONS] <SOURCE> [TARGET]
OPTIONS:
-h, --help Show this message
-v, --verbose Show more output
-q, --quiet Suppress all output
-f, --force Overwrite items
-n, --dry-run Write output of commands with running them.
ARGS:
SOURCE (required)
Path to the source file or directory the link should point to.
TARGET (optional)
Path to the location to create the link. [Default: $PWD]
EOF
}
say() {
if ! $quiet; then
printf "%s: %s\n" "$SCRIPT" "$@"
fi
}
say_verbose() {
if $verbose; then
say "$@"
fi
}
say_err() {
say "$@" >&2
}
err() {
# shellcheck disable=SC2145
say_err "ERROR: $@"
exit 1
}
err_help() {
help
err "$*"
}
run() {
if $is_dry_run; then
say "DRYRUN: $*"
return 0
fi
say_verbose "running: $*"
if $quiet; then
"$@" &>/dev/null
else
say "$("$@")"
fi
}
need() {
for cmd in "$@"; do
if ! command -v "$cmd" >/dev/null 2>&1; then
err "need $cmd (command not found)"
fi
done
}
trg=$PWD
verbose=false
quiet=false
force=false
is_dry_run=false
while true; do
case "$1" in
-h | --help)
help
exit 0
;;
-v | --verbose)
verbose=true
shift
;;
-q | --quiet)
quiet=true
shift
;;
-f | --force)
force=true
shift
;;
-n | --dry-run)
is_dry_run=true
shift
;;
--)
shift
break
;;
*)
break
;;
esac
done
need powershell.exe
need realpath
case "$#" in
0) err_help "must provide at least 1 argument";;
1) src="$1"; trg="$PWD"; shift;;
2) src="$1"; trg="$2"; shift 2;;
*) err_help "too many arguments"
esac
while test -L "$src"; do
tmp="$src"
src=$(realpath "$src")
say_verbose "resolved symbolic link $tmp -> $src"
done
if ! test -e "$src"; then
err "$src does not exist."
fi
if test -d "$src"; then
say_verbose "$src is a directory. Switching to directory symbolic link."
args='/D'
fi
trg_name=$(basename "$trg")
trg_dir=$(dirname "$trg")
if ! test -d "$trg_dir"; then
mkdir -p "$trg_dir"
say_verbose "created directory $trg_dir"
fi
win_src=$(wslpath -w "$src")
win_trg=$(wslpath -w "$trg_dir")\\"$trg_name"
old_trg="$(powershell.exe "(Get-Item $win_trg).FullName" 2>/dev/null)"
old_src="$(powershell.exe "(Get-Item $win_trg).Target" 2>/dev/null)"
old_src="${old_src/*wsl$/}"
new_src="${win_src/*wsl$/}"
if ! $force && test "${old_src#*"$new_src"}" != "$old_src"; then
say_verbose "symbolic link already exists."
exit 0
fi
say_verbose "$(cat <<-EOF
linking:
WSL paths:
target: $trg
source: $src
Win paths:
target: $win_trg
source: $win_src
EOF
)"
if test "$old_trg" != ''; then
if $force; then
say_verbose "$(cat <<-EOF
$win_trg already exists. Overwriting.
target: $win_trg
source: $old_src
EOF
)"
rm -rf "$trg"
else
err "$(cat <<-EOF
$win_trg already exists.
Existing file:
target: $win_trg
source: $old_src
Use -f or --force to overwrite.
EOF
)"
fi
fi
run powershell.exe "cd ~; cmd /c mklink $args $win_trg $win_src"
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