mcfly-fzf.fish

#!/usr/bin/env fish

# Ensure mcfly is initialized first
if not set -q MCFLY_SESSION_ID
  echo "Mcfly-fzf: Must initialize mcfly before mcfly-fzf"
  exit 1
end

# Avoid loading this file more than once
if test "$__MCFLY_FZF_LOADED" != "loaded"
  set -g __MCFLY_FZF_LOADED "loaded"

  # Find the mcfly-fzf binary
  set -q MCFLY_FZF_PATH; or set -g MCFLY_FZF_PATH (command -v mcfly-fzf)
  if test -z "$MCFLY_FZF_PATH"; or test "$MCFLY_FZF_PATH" = "mcfly-fzf not found"
    echo "Mcfly-fzf: Cannot find the mcfly-fzf binary, please make sure that mcfly-fzf is in your path before initializing"
    exit 1
  end

  # Find the fzf binary
  if not command -vq fzf
    echo "Mcfly-fzf: Cannot find the fzf binary, please make sure that fzf is in your path before initializing"
    exit 1
  end

  set -l tmpdir $TMPDIR
  if test -z "$tmpdir"
    set tmpdir /tmp
  end
  # MCFLY_SESSION_ID is used by McFly internally to keep track of the commands from a particular terminal session.
  set -gx MCFLY_FZF_OPTS (mktemp "$tmpdir/mcfly-fzf.json.XXXXXXXX")

  # If this is an interactive shell, set up key binding functions.
  if status is-interactive
    # Adapted from junegunn/fzf shell/key-bindings.fish
    function __mcfly-fzf-history-widget -d "Search command history with McFly (using fzf)"
      test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
      begin
        set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS 
          --nth=2.. --delimiter='\t' --no-hscroll --tiebreak=index --read0 --layout reverse 
          --bind=ctrl-r:toggle-sort 
          --bind='f1:reload(\"$MCFLY_FZF_PATH\" toggle \"$MCFLY_FZF_OPTS\" sort-order && \"$MCFLY_FZF_PATH\" dump --header -0 --options-json \"$MCFLY_FZF_OPTS\")' 
          --bind='f2:reload(\"$MCFLY_FZF_PATH\" toggle \"$MCFLY_FZF_OPTS\" current-dir-only && \"$MCFLY_FZF_PATH\" dump --header -0 --options-json \"$MCFLY_FZF_OPTS\")' 
          --bind='f3:reload(\"$MCFLY_FZF_PATH\" toggle \"$MCFLY_FZF_OPTS\" exit-code && \"$MCFLY_FZF_PATH\" dump --header -0 --options-json \"$MCFLY_FZF_OPTS\")' 
          --ansi
          --header-lines 1
          $FZF_CTRL_R_OPTS +m"

        eval $MCFLY_FZF_PATH --history-format fish dump --header -0 --options-json $MCFLY_FZF_OPTS | eval fzf -q '(commandline)' | 
        string replace -r "[^\t]*\t" "" | read -l result
        and commandline -- $result
        and eval $MCFLY_FZF_PATH select -- "$result"
      end
      commandline -f repaint
    end
  
    bind \cr __mcfly-fzf-history-widget
    if bind -M insert >/dev/null 2>&1
      bind -M insert \cr __mcfly-fzf-history-widget
    end

  end
end