.iterm2_shell_integration.bash

#!/bin/bash

# -- BEGIN ITERM2 CUSTOMIZATIONS --
if [[ "$TERM" != screen && "$ITERM_SHELL_INTEGRATION_INSTALLED" = "" && "$-" == *i* ]]; then
ITERM_SHELL_INTEGRATION_INSTALLED=Yes
# Saved copy of your PS1. This is used to detect if the user changes PS1
# directly. ITERM_PREV_PS1 will hold the last value that this script set PS1 to
# (including various custom escape sequences).
ITERM_PREV_PS1="$PS1"

# -- END ITERM2 CUSTOMIZATIONS --

# The following chunk of code, bash-preexec.sh, is licensed like this:
# The MIT License
#
# Copyright (c) 2015 Ryan Caloras and contributors (see https://github.com/rcaloras/bash-preexec)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

# -- BEGIN BASH-PREEXEC.SH --
#!/bin/bash
#
# bash-preexec.sh -- Bash support for ZSH-like 'preexec' and 'precmd' functions.
# https://github.com/rcaloras/bash-preexec
#
#
# 'preexec' functions are executed before each interactive command is
# executed, with the interactive command as its argument. The 'precmd'
# function is executed before each prompt is displayed.
#
# Author: Ryan Caloras (ryan@bashhub.com)
# Forked from Original Author: Glyph Lefkowitz
#
# V0.3.3
#

# General Usage:
#
#  1. Source this file at the end of your bash profile so as not to interfere
#     with anything else that's using PROMPT_COMMAND.
#
#  2. Add any precmd or preexec functions by appending them to their arrays:
#       e.g.
#       precmd_functions+=(my_precmd_function)
#       precmd_functions+=(some_other_precmd_function)
#
#       preexec_functions+=(my_preexec_function)
#
#  3. If you have anything that's using the Debug Trap, change it to use
#     preexec. (Optional) change anything using PROMPT_COMMAND to now use
#     precmd instead.
#
#  Note: This module requires two bash features which you must not otherwise be
#  using: the "DEBUG" trap, and the "PROMPT_COMMAND" variable. prexec_and_precmd_install
#  will override these and if you override one or the other this will most likely break.

# Avoid duplicate inclusion
if [[ "$__bp_imported" == "defined" ]]; then
    return 0
fi
__bp_imported="defined"

# Should be available to each precmd and preexec
# functions, should they want it.
__bp_last_ret_value="$?"
__bp_last_argument_prev_command="$_"

# Command to set our preexec trap. It's invoked once via
# PROMPT_COMMAND and then removed.
__bp_trap_install_string="trap '__bp_preexec_invoke_exec \"\$_\"' DEBUG;"

# Remove ignorespace and or replace ignoreboth from HISTCONTROL
# so we can accurately invoke preexec with a command from our
# history even if it starts with a space.
__bp_adjust_histcontrol() {
    local histcontrol
    histcontrol="${HISTCONTROL//ignorespace}"
    # Replace ignoreboth with ignoredups
    if [[ "$histcontrol" == *"ignoreboth"* ]]; then
        histcontrol="ignoredups:${histcontrol//ignoreboth}"
    fi;
    export HISTCONTROL="$histcontrol"
}

# This variable describes whether we are currently in "interactive mode";
# i.e. whether this shell has just executed a prompt and is waiting for user
# input.  It documents whether the current command invoked by the trace hook is
# run interactively by the user; it's set immediately after the prompt hook,
# and unset as soon as the trace hook is run.
__bp_preexec_interactive_mode=""

__bp_trim_whitespace() {
    local var=$@
    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
    echo -n "$var"
}

# This function is installed as part of the PROMPT_COMMAND;
# It sets a variable to indicate that the prompt was just displayed,
# to allow the DEBUG trap to know that the next command is likely interactive.
__bp_interactive_mode() {
    __bp_preexec_interactive_mode="on";
}


# This function is installed as part of the PROMPT_COMMAND.
# It will invoke any functions defined in the precmd_functions array.
__bp_precmd_invoke_cmd() {

    # Save the returned value from our last command
    __bp_last_ret_value="$?"

    # For every function defined in our function array. Invoke it.
    local precmd_function
    for precmd_function in "${precmd_functions[@]}"; do

        # Only execute this function if it actually exists.
        # Test existence of functions with: declare -[Ff]
        if type -t "$precmd_function" 1>/dev/null; then
            __bp_set_ret_value "$__bp_last_ret_value" "$__bp_last_argument_prev_command"
            $precmd_function
        fi
    done
}

# Sets a return value in $?. We may want to get access to the $? variable in our
# precmd functions. This is available for instance in zsh. We can simulate it in bash
# by setting the value here.
__bp_set_ret_value() {
    return $1
}

__bp_in_prompt_command() {

    local prompt_command_array
    IFS=';' read -ra prompt_command_array <<< "$PROMPT_COMMAND"

    local trimmed_arg
    trimmed_arg=$(__bp_trim_whitespace "$1")

    local command
    for command in "${prompt_command_array[@]}"; do
        local trimmed_command
        trimmed_command=$(__bp_trim_whitespace "$command")
        # Only execute each function if it actually exists.
        if [[ "$trimmed_command" == "$trimmed_arg" ]]; then
            return 0
        fi
    done

    return 1
}

# This function is installed as the DEBUG trap.  It is invoked before each
# interactive prompt display.  Its purpose is to inspect the current
# environment to attempt to detect if the current command is being invoked
# interactively, and invoke 'preexec' if so.
__bp_preexec_invoke_exec() {


    # Save the contents of $_ so that it can be restored later on.
    # https://stackoverflow.com/questions/40944532/bash-preserve-in-a-debug-trap#40944702
    __bp_last_argument_prev_command="$1"

    # Checks if the file descriptor is not standard out (i.e. '1')
    # __bp_delay_install checks if we're in test. Needed for bats to run.
    # Prevents preexec from being invoked for functions in PS1
    if [[ ! -t 1 && -z "$__bp_delay_install" ]]; then
        return
    fi

    if [[ -n "$COMP_LINE" ]]; then
        # We're in the middle of a completer. This obviously can't be
        # an interactively issued command.
        return
    fi
    if [[ -z "$__bp_preexec_interactive_mode" ]]; then
        # We're doing something related to displaying the prompt.  Let the
        # prompt set the title instead of me.
        return
    else
        # If we're in a subshell, then the prompt won't be re-displayed to put
        # us back into interactive mode, so let's not set the variable back.
        # In other words, if you have a subshell like
        #   (sleep 1; sleep 2)
        # You want to see the 'sleep 2' as a set_command_title as well.
        if [[ 0 -eq "$BASH_SUBSHELL" ]]; then
            __bp_preexec_interactive_mode=""
        fi
    fi

    if  __bp_in_prompt_command "$BASH_COMMAND"; then
        # If we're executing something inside our prompt_command then we don't
        # want to call preexec. Bash prior to 3.1 can't detect this at all :/
        __bp_preexec_interactive_mode=""
        return
    fi

    local this_command
    this_command=$(HISTTIMEFORMAT= history 1 | { read -r _ this_command; echo "$this_command"; })

    # Sanity check to make sure we have something to invoke our function with.
    if [[ -z "$this_command" ]]; then
        return
    fi

    # If none of the previous checks have returned out of this function, then
    # the command is in fact interactive and we should invoke the user's
    # preexec functions.

    # For every function defined in our function array. Invoke it.
    local preexec_function
    local preexec_ret_value=0
    for preexec_function in "${preexec_functions[@]}"; do

        # Only execute each function if it actually exists.
        # Test existence of function with: declare -[fF]
        if type -t "$preexec_function" 1>/dev/null; then
            __bp_set_ret_value $__bp_last_ret_value
            $preexec_function "$this_command"
            preexec_ret_value="$?"
        fi
    done

    # Restore the last argument of the last executed command
    # Also preserves the return value of the last function executed in preexec
    # If `extdebug` is enabled a non-zero return value from the last function
    # in prexec causes the command not to execute
    # Run `shopt -s extdebug` to enable
    __bp_set_ret_value "$preexec_ret_value" "$__bp_last_argument_prev_command"
}

# Returns PROMPT_COMMAND with a semicolon appended
# if it doesn't already have one.
__bp_prompt_command_with_semi_colon() {

    # Trim our existing PROMPT_COMMAND
    local trimmed
    trimmed=$(__bp_trim_whitespace "$PROMPT_COMMAND")

    # Take our existing prompt command and append a semicolon to it
    # if it doesn't already have one.
    local existing_prompt_command
    if [[ -n "$trimmed" ]]; then
        existing_prompt_command=${trimmed%${trimmed##*[![:space:]]}}
        existing_prompt_command=${existing_prompt_command%;}
        existing_prompt_command=${existing_prompt_command/%/;}
    else
        existing_prompt_command=""
    fi

    echo -n "$existing_prompt_command"
}

__bp_install() {

    # Remove setting our trap from PROMPT_COMMAND
    PROMPT_COMMAND="${PROMPT_COMMAND//$__bp_trap_install_string}"

    # Remove this function from our PROMPT_COMMAND
    PROMPT_COMMAND="${PROMPT_COMMAND//__bp_install;}"

    # Exit if we already have this installed.
    if [[ "$PROMPT_COMMAND" == *"__bp_precmd_invoke_cmd"* ]]; then
        return 1;
    fi

    # Adjust our HISTCONTROL Variable if needed.
    __bp_adjust_histcontrol


    # Issue #25. Setting debug trap for subshells causes sessions to exit for
    # backgrounded subshell commands (e.g. (pwd)& ). Believe this is a bug in Bash.
    #
    # Disabling this by default. It can be enabled by setting this variable.
    if [[ -n "$__bp_enable_subshells" ]]; then

        # Set so debug trap will work be invoked in subshells.
        set -o functrace > /dev/null 2>&1
        shopt -s extdebug > /dev/null 2>&1
    fi;


    local existing_prompt_command
    existing_prompt_command=$(__bp_prompt_command_with_semi_colon)

    # Install our hooks in PROMPT_COMMAND to allow our trap to know when we've
    # actually entered something.
    PROMPT_COMMAND="__bp_precmd_invoke_cmd; ${existing_prompt_command} __bp_interactive_mode"
    eval "$__bp_trap_install_string"

    # Add two functions to our arrays for convenience
    # of definition.
    precmd_functions+=(precmd)
    preexec_functions+=(preexec)

    # Since this is in PROMPT_COMMAND, invoke any precmd functions we have defined.
    __bp_precmd_invoke_cmd
    # Put us in interactive mode for our first command.
    __bp_interactive_mode
}

# Sets our trap and __bp_install as part of our PROMPT_COMMAND to install
# after our session has started. This allows bash-preexec to be inlucded
# at any point in our bash profile. Ideally we could set our trap inside
# __bp_install, but if a trap already exists it'll only set locally to
# the function.
__bp_install_after_session_init() {

    # Make sure this is bash that's running this and return otherwise.
    if [[ -z "$BASH_VERSION" ]]; then
        return 1;
    fi

    local existing_prompt_command
    existing_prompt_command=$(__bp_prompt_command_with_semi_colon)

    # Add our installation to be done last via our PROMPT_COMMAND. These are
    # removed by __bp_install when it's invoked so it only runs once.
    PROMPT_COMMAND="${existing_prompt_command} $__bp_trap_install_string __bp_install;"
}

# Run our install so long as we're not delaying it.
if [[ -z "$__bp_delay_install" ]]; then
    __bp_install_after_session_init
fi;

# -- BEGIN BASH-PREEXEC.SH --

# -- BEGIN ITERM2 CUSTOMIZATIONS --

# We don't care about whitespace, but users care about not changing their histcontrol variables.
# We overwrite the upstream __bp_adjust_histcontrol function whcih gets called from the next
# PROMPT_COMMAND invocation.
function __bp_adjust_histcontrol() {
  true
}

function iterm2_begin_osc {
  printf "\033]"
}

function iterm2_end_osc {
  printf "\007"
}

function iterm2_print_state_data() {
  iterm2_begin_osc
  printf "1337;RemoteHost=%s@%s" "$USER" "$iterm2_hostname"
  iterm2_end_osc

  iterm2_begin_osc
  printf "1337;CurrentDir=%s" "$PWD"
  iterm2_end_osc

  iterm2_print_user_vars
}

# Usage: iterm2_set_user_var key value
function iterm2_set_user_var() {
  iterm2_begin_osc
  printf "1337;SetUserVar=%s=%s" "$1" $(printf "%s" "$2" | base64 | tr -d '\n')
  iterm2_end_osc
}

if [ -z "$(type -t iterm2_print_user_vars)" ] || [ "$(type -t iterm2_print_user_vars)" != function ]; then
  # iterm2_print_user_vars is not already defined. Provide a no-op default version.
  #
  # Users can write their own version of this function. It should call
  # iterm2_set_user_var but not produce any other output.
  function iterm2_print_user_vars() {
    true
  }
fi

function iterm2_prompt_prefix() {
  iterm2_begin_osc
  printf "133;D;\$?"
  iterm2_end_osc
}

function iterm2_prompt_mark() {
  iterm2_begin_osc
  printf "133;A"
  iterm2_end_osc
}

function iterm2_prompt_suffix() {
  iterm2_begin_osc
  printf "133;B"
  iterm2_end_osc
}

function iterm2_print_version_number() {
  iterm2_begin_osc
  printf "1337;ShellIntegrationVersion=8;shell=bash"
  iterm2_end_osc
}


# If hostname -f is slow on your system, set iterm2_hostname before sourcing this script.
if [ -z "${iterm2_hostname:-}" ]; then
  iterm2_hostname=$(hostname -f 2>/dev/null)
  # some flavors of BSD (i.e. NetBSD and OpenBSD) don't have the -f option
  if [ $? -ne 0 ]; then
    iterm2_hostname=$(hostname)
  fi
fi

# Runs after interactively edited command but before execution
__iterm2_preexec() {
    # Save the returned value from our last command
    __iterm2_last_ret_value="$?"

    iterm2_begin_osc
    printf "133;C;"
    iterm2_end_osc
    # If PS1 still has the value we set it to in iterm2_preexec_invoke_cmd then
    # restore it to its original value. It might have changed if you have
    # another PROMPT_COMMAND (like liquidprompt) that modifies PS1.
    if [ -n "${ITERM_ORIG_PS1+xxx}" -a "$PS1" = "$ITERM_PREV_PS1" ]
    then
      export PS1="$ITERM_ORIG_PS1"
    fi
    iterm2_ran_preexec="yes"

    __bp_set_ret_value "$__iterm2_last_ret_value" "$__bp_last_argument_prev_command"
}

function __iterm2_precmd () {
    __iterm2_last_ret_value="$?"

    # Work around a bug in CentOS 7.2 where preexec doesn't run if you press
    # ^C while entering a command.
    if [[ -z "${iterm2_ran_preexec:-}" ]]
    then
        __iterm2_preexec ""
    fi
    iterm2_ran_preexec=""



    # This is an iTerm2 addition to try to work around a problem in the
    # original preexec.bash.
    # When the PS1 has command substitutions, this gets invoked for each
    # substitution and each command that's run within the substitution, which
    # really adds up. It would be great if we could do something like this at
    # the end of this script:
    #   PS1="$(iterm2_prompt_prefix)$PS1($iterm2_prompt_suffix)"
    # and have iterm2_prompt_prefix set a global variable that tells precmd not to
    # output anything and have iterm2_prompt_suffix reset that variable.
    # Unfortunately, command substitutions run in subshells and can't
    # communicate to the outside world.
    # Instead, we have this workaround. We save the original value of PS1 in
    # $ITERM_ORIG_PS1. Then each time this function is run (it's called from
    # PROMPT_COMMAND just before the prompt is shown) it will change PS1 to a
    # string without any command substitutions by doing eval on ITERM_ORIG_PS1. At
    # this point ITERM_PREEXEC_INTERACTIVE_MODE is still the empty string, so preexec
    # won't produce output for command substitutions.

    # The first time this is called ITERM_ORIG_PS1 is unset. This tests if the variable
    # is undefined (not just empty) and initializes it. We can't initialize this at the
    # top of the script because it breaks with liquidprompt. liquidprompt wants to
    # set PS1 from a PROMPT_COMMAND that runs just before us. Setting ITERM_ORIG_PS1
    # at the top of the script will overwrite liquidprompt's PS1, whose value would
    # never make it into ITERM_ORIG_PS1. Issue 4532. It's important to check
    # if it's undefined before checking if it's empty because some users have
    # bash set to error out on referencing an undefined variable.
    if [ -z "${ITERM_ORIG_PS1+xxx}" ]
    then
      # ITERM_ORIG_PS1 always holds the last user-set value of PS1.
      # You only get here on the first time iterm2_preexec_invoke_cmd is called.
      export ITERM_ORIG_PS1="$PS1"
    fi

    if [[ "$PS1" != "$ITERM_PREV_PS1" ]]
    then
      export ITERM_ORIG_PS1="$PS1"
    fi

    # Get the value of the prompt prefix, which will change $?
    \local iterm2_prompt_prefix_value="$(iterm2_prompt_prefix)"

    # Add the mark unless the prompt includes '$(iterm2_prompt_mark)' as a substring.
    if [[ $ITERM_ORIG_PS1 != *'$(iterm2_prompt_mark)'* ]]
    then
      iterm2_prompt_prefix_value="$iterm2_prompt_prefix_value$(iterm2_prompt_mark)"
    fi

    # Send escape sequences with current directory and hostname.
    iterm2_print_state_data

    # Reset $? to its saved value, which might be used in $ITERM_ORIG_PS1.
    __bp_set_ret_value "$__iterm2_last_ret_value" "$__bp_last_argument_prev_command"

    # Set PS1 to various escape sequences, the user's preferred prompt, and more escape sequences.
    export PS1="\[$iterm2_prompt_prefix_value\]$ITERM_ORIG_PS1\[$(iterm2_prompt_suffix)\]"

    # Save the value we just set PS1 to so if the user changes PS1 we'll know and we can update ITERM_ORIG_PS1.
    export ITERM_PREV_PS1="$PS1"
    __bp_set_ret_value "$__iterm2_last_ret_value" "$__bp_last_argument_prev_command"
}

# Install my functions
preexec_functions+=(__iterm2_preexec)
precmd_functions+=(__iterm2_precmd)

fi

# -- END ITERM2 CUSTOMIZATIONS --

alias imgcat=~/.iterm2/imgcat;alias imgls=~/.iterm2/imgls;alias it2attention=~/.iterm2/it2attention;alias it2check=~/.iterm2/it2check;alias it2copy=~/.iterm2/it2copy;alias it2dl=~/.iterm2/it2dl;alias it2getvar=~/.iterm2/it2getvar;alias it2setcolor=~/.iterm2/it2setcolor;alias it2setkeylabel=~/.iterm2/it2setkeylabel;alias it2ul=~/.iterm2/it2ul;alias it2universion=~/.iterm2/it2universion