symlinkctl

#!/usr/bin/env bash
# Creates symbolic links for all dotfiles and directories in this directory to your home directory. Modifying
# $FILES_NOT_TO_SYMLINK_REGEX to exclude items from being symlinked. If a file with the same name already exists in your
# home directory, it will be backed-up with .backup extension.

# ## configuration variables ############################################################################################
FILES_NOT_TO_SYMLINK_REGEX="git|gitignore|gitmodules|idea|README.md|symlinkctl"
TOP_LEVEL_DIRECTORIES_TO_SYMLINK=("./.liquidprompt" "./.tmux")
TOP_LEVEL_DIRECTORIES_TO_TRAVERSE=("./" "./.ssh/" "./.vim/")
########################################################################################################################

# ## macOS support #####################################################################################################
if test "$(uname)" == "Darwin"; then
  if command -v ggrep greadlink > /dev/null; then
    unalias grep readlink
    shopt -s expand_aliases
    alias grep=ggrep readlink=greadlink
  else
    printf "\e[0;31m\n Please install coreutils (https://formulae.brew.sh/formula/coreutils) before running this script.\n\e[0m"
    exit 1
  fi
fi
########################################################################################################################

# $1 - pwd
# $2 - absolute home path
# $3 - dotfile path relative to pwd
enable() {

  local DEST DOTFILE FILES_TO_SYMLINK GREP_STRING I SOURCE TYPE_STRING

  mkdir -p "$2"/"$3"
  GREP_STRING="\w\b(?<!$FILES_NOT_TO_SYMLINK_REGEX)$"
  if [[ $3 == "./" ]]; then TYPE_STRING="-type f"; fi
  # shellcheck disable=SC2207 disable=SC2086
  FILES_TO_SYMLINK=($(find "$3" -maxdepth 1 $TYPE_STRING | grep -P "$GREP_STRING" | tr '\n' ' '))
  if [[ $3 == "./" ]]; then
    FILES_TO_SYMLINK+=("${TOP_LEVEL_DIRECTORIES_TO_SYMLINK[@]}")
  fi
  for DOTFILE in "${FILES_TO_SYMLINK[@]}"; do
    DOTFILE="${DOTFILE#"$3"}"
    SOURCE=$(readlink -f "$1/$3$DOTFILE")
    DEST=$(readlink -f "$2/$3$DOTFILE")
    # if the file exists in the home directory
    if [[ -e "$DEST" ]]; then
      # and the file that exists isn't already a symlink to the source file
      if [[ "$DEST" != "$SOURCE" ]]; then
        I=0
        while true; do
          I=$((I + 1))
          # find a unique name for the backup file
          if [[ -e "$DEST.$I.backup" ]]; then
            continue
          else
            # backup the file
            if mv "$DEST" "$DEST.$I.backup"; then
              printf "\e[0;33m  %s → %s\n" "$DEST" "$DEST.$I.backup"
              # and create the symlink
              if ln -fs "$SOURCE" "$DEST"; then
                printf "\e[0;33m  [✔] %s → %s\e[0m\n" "$SOURCE" "$DEST"
              else
                printf "\e[0;31m  [✖] %s → %s\e[0m\n" "$SOURCE" "$DEST"
              fi
              break
            else
              printf "\e[0;31m  could not copy %s → %s, exiting out of paranoia\n" "$DEST" "$DEST.$I.backup"
              exit 1
            fi
          fi
        done
      else
        printf "\e[0;32m  [✔] %s is already linked \e[0m\n" "$DEST"
      fi
    else
      # otherwise, create the symlink
      if ln -fs "$SOURCE" "$DEST"; then
        printf "\e[0;33m  [✔] %s → %s\e[0m\n" "$SOURCE" "$DEST"
      else
        printf "\e[0;31m  [✖] %s → %s\e[0m\n" "$SOURCE" "$DEST"
      fi
    fi
  done
}

disable() {
  local FILES_TO_UNLINK LINK_TARGET
  # shellcheck disable=SC2207
  FILES_TO_UNLINK=($(find ~ -maxdepth 2 -type l | tr '\n' ' '))
  for LINKED_FILE in "${FILES_TO_UNLINK[@]}"; do
    LINK_TARGET=$(readlink -f "$LINKED_FILE")
    if [[ $LINK_TARGET == $(pwd)* ]]; then
      printf "\e[0;33m [✔] removing linked file %s\e[0m\n" "$LINKED_FILE"
      rm "$LINKED_FILE"
    fi
  done
}

if [[ "$1" == "enable" ]]; then
  mkdir -p ~/.ssh/control
  chmod 0600 .ssh/config
  chmod 0600 .ssh/environment
  for SYMLINK_PATH in "${TOP_LEVEL_DIRECTORIES_TO_TRAVERSE[@]}"; do
    enable "$(pwd)" "$HOME" "$SYMLINK_PATH"
  done
  vim +PluginInstall +qall
  ~/.tmux/plugins/tpm/scripts/install_plugins.sh
  exit 0
fi

if [[ "$1" == "disable" ]]; then
  disable
  exit 0
fi

printf "\e[0;31m\n  Please enter an argument:\n\n \tenable:\t enable dotfiles by adding symlinks in your home directory\n\n \tdisable: disable dotfiles by removing the symlinks from your home directory \e[0m \n\n"
exit 0