From 030dfdf80134bfec968809da67ada9c8248dada2 Mon Sep 17 00:00:00 2001
From: Xavier Logerais <xavier@logerais.com>
Date: Sun, 10 Feb 2019 18:12:22 +0100
Subject: [PATCH] Added support for mcfly (https://github.com/cantino/mcfly)

---
 rc.d/mcfly.bash | 60 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 rc.d/mcfly.bash

diff --git a/rc.d/mcfly.bash b/rc.d/mcfly.bash
new file mode 100644
index 0000000..b596d8d
--- /dev/null
+++ b/rc.d/mcfly.bash
@@ -0,0 +1,60 @@
+#!/bin/bash
+
+if ( ! which mcfly &> /dev/null ); then return; fi
+
+# Avoid loading this file more than once
+if [[ "$__MCFLY_LOADED" == "loaded" ]]; then
+  return 0
+fi
+
+__MCFLY_LOADED="loaded"
+export MCFLY_SESSION_ID=$(cat /dev/urandom | env LC_ALL=C tr -dc 'a-zA-Z0-9' | fold -w 24 | head -n 1)
+export MCFLY_HISTORY=$(mktemp -t mcfly.XXXX)
+export HISTFILE="${HISTFILE:-$HOME/.bash_history}"
+
+if [[ -f "$HISTFILE" ]];
+then
+  tail -n100 "${HISTFILE}" >| ${MCFLY_HISTORY}
+else
+  printf "Welcome to McFly\n" >| ${MCFLY_HISTORY}
+fi
+
+# Ignore commands with a leading space
+export HISTCONTROL="ignorespace"
+
+# Append new history items to .bash_history
+shopt -s histappend
+
+# Setup a function to be used by $PROMPT_COMMAND.
+function mcfly_prompt_command {
+  local exit_code=$? # Record exit status of previous command.
+  history -a ${MCFLY_HISTORY} # Append history to $MCFLY_HISTORY.
+  # Run mcfly with the saved code. It will:
+  # * append commands to $HISTFILE, (~/.bash_history by default)
+  #   for backwards compatibility and to load in new terminal sessions;
+  # * find the text of the last command in $MCFLY_HISTORY and save it to the database.
+  mcfly add --exit ${exit_code} --append-to-histfile
+  # Clear the in-memory history and reload it from $MCFLY_HISTORY
+  # (to remove instances of '#mcfly: ' from the local session history).
+  history -cr ${MCFLY_HISTORY}
+  return ${exit_code} # Restore the original exit code by returning it.
+}
+
+# Set $PROMPT_COMMAND run mcfly_prompt_command and then any existing $PROMPT_COMMAND.
+PROMPT_COMMAND="mcfly_prompt_command;$PROMPT_COMMAND"
+
+# If this is an interactive shell, take ownership of ctrl-r.
+# The logic here is:
+#   1. Jump to the beginning of the edit buffer, add 'mcfly: ', and comment out the current line. We comment out the line
+#      to ensure that all possible special characters, including backticks, are ignored. This commented out line will
+#      end up as the most recent entry in the $MCFLY_HISTORY file.
+#   2. Type "mcfly search" and then run the command. McFly will pull the last line from the $MCFLY_HISTORY file,
+#      which should be the commented-out search from step #1. It will then remove that line from the history file and
+#      render the search UI pre-filled with it.
+if [[ $- =~ .*i.* ]]; then
+  if set -o | grep "vi " | grep -q on; then
+    bind "'\C-r': '\e0i#mcfly: \e\C-j mcfly search\C-j'"
+  else
+    bind "'\C-r': '\C-amcfly: \e# mcfly search\C-j'"
+  fi
+fi