setup_symlinks.sh

#!/bin/bash

array_contains () {
    local e match="$1"
    shift
    for e; do [[ "$match" =~ "$e/" ]] && return 0; done
    return 1
}

echo "Symlinking user dirs"
# must happen before files
user_dirs=(
    user/.local/share/systemd
    user/.zsh
    user/.emacs.d
)


for dir in "${user_dirs[@]}"; do
    dest_dir=${dir/"user"/$HOME}
    # skip if dir is already symlinked
    if [[ -L "$dest_dir" && -d "$dest_dir" ]]; then continue; fi

    parent_dir=$(echo $dir | sed -E 's/\/[^/]*$//')
    mkdir -p $parent_dir
    ln -sf $(pwd)/$dir $dest_dir
done

echo "Symlinking user files"
user_files=()
while IFS=  read -r -d $'\0' file; do
    user_files+=("$file")
done < <(find user \( -type f -o -type l  \) -print0)


for file in "${user_files[@]}"; do
    # # skip files in the symlinked directories
    if array_contains $file "${user_dirs[@]}"; then continue; fi

    dest_file=${file/"user"/$HOME}
    dir=$(echo $dest_file | sed -E 's/\/[^/]*$//')

    mkdir -p $dir
    ln -sf $(pwd)/$file $dest_file
done

echo

if [[ "$OSTYPE" == linux* ]]; then
    echo "Symlinking system files"
    system_files=$(find system \( -type f -o -type l \))

    for file in $system_files; do
        dest_file=${file/"system"/}
        dir=$(echo $dest_file | sed -E 's/\/[^/]*$//')
        sudo mkdir -p $dir
        sudo ln -sf $(pwd)/$file $dest_file
    done
fi