compnav.sh

# Compnav setup. See readme for instructions.
#
# Source this only from interactive shell startup scripts (like .bashrc or zshrc).
#
# As much logic as possible is in the Ruby scripts to minimize the amount of bash gobbledygook.

up() {
  local dir
  # Pass COMPNAV_FZF_UP_OPTS to fzf if set, or use the default set of options.
  #
  # --select-1 --exit-0: Don't show the interactive fzf finder if there's 1 or 0 matches.
  # --sync --bind 'start:accept': Accepts the first match for you when fzf finishes listing.
  dir=$(COMPNAV_FZF_UP_OPTS="${COMPNAV_FZF_UP_OPTS:---select-1 --exit-0 --sync --bind 'start:accept' --height '0%'}" \
    ruby "$COMPNAV_DIR/up.rb" "--fzf" "$*") &&
    # Expand a leading ~ ourselves. (eval would execute code embedded in dir names.)
    cd "${dir/#\~/$HOME}" || return;
}

z() {
  local dir
  # See comments on up().
  dir=$(COMPNAV_FZF_Z_OPTS="${COMPNAV_FZF_Z_OPTS:---select-1 --exit-0}" \
    ruby "$COMPNAV_DIR/z.rb" "--fzf" "$*") &&
    cd "${dir/#\~/$HOME}" || return;
}

h() {
  local dir
  # See comments on up().
  dir=$(COMPNAV_FZF_H_OPTS="${COMPNAV_FZF_H_OPTS:---select-1 --exit-0}" \
    ruby "$COMPNAV_DIR/h.rb" "--fzf" "$*") &&
    cd "${dir/#\~/$HOME}" || return;
}

# If the new dir is different than the old dir, update the recent-dirs file.
_compnav_track() {
  [ "$OLDPWD" = "$PWD" ] || ruby "$COMPNAV_DIR/z.rb" --add "$PWD"
}

if [ -n "$ZSH_VERSION" ]; then
  # zsh's chpwd hook fires on every directory change: cd, pushd/popd, AUTO_CD, cd -.
  # add-zsh-hook won't add the hook twice if this file is sourced again.
  autoload -Uz add-zsh-hook
  add-zsh-hook chpwd _compnav_track
else
  # bash has no chpwd hook, so wrap the builtins that change directory.
  cd()    { builtin cd "$@"    || return; _compnav_track; }
  pushd() { builtin pushd "$@" || return; _compnav_track; }
  popd()  { builtin popd "$@"  || return; _compnav_track; }
fi

# Add the initial pwd at shell session startup.
ruby "$COMPNAV_DIR/z.rb" --add "$PWD"