Make symlinks from a directory's file structure out on the filesystem

link_tree

#!/bin/bash

in_path=$1

if [[ "$in_path" == "" ]] || [[ "$in_path" == "-h" ]]; then
    cat <<USAGE
Usage: link_tree PATH [--dry-run]

Finds every symbolic link in PATH/subdirectory** and creates links to them in
/subdirectory**

For example, if PATH is /home/foo/links, and that contains files (or links):
/home/foo/links/usr/local/bin/goat
/home/foo/links/usr/local/etc/attacks

linkify will create:

/usr/local/bin/goat -> /home/foo/links/usr/local/bin/goat
/usr/local/etc/attacks -> /home/foo/links/usr/local/etc/attacks

Options:
  --dry-run    Don't actually make links.
USAGE
exit 1
fi

dry_run=$2
if [[ "$dry_run" != "" ]] && [[ "$dry_run" != "--dry-run" ]]; then
    echo "Unknown option $2"
    exit 2
fi

pushd $in_path > /dev/null
    for symlink in $(find "$PWD" -type l -or -type f); do
        target=$(echo "$symlink" | sed "s|^$PWD||")
        cmd="ln -s \"$symlink\" \"$target\""
        echo $cmd
        if [[ "$dry_run" == "" ]]; then
            # We already checked to make sure it was --dry-run
            eval $cmd
        fi
    done
popd > /dev/null