scripts/watch at master · fbnmtz/scripts · GitHub

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#!/usr/bin/env bash
#
# ############################################################################
# Project: scripts (none)
# File...: watch
# Created: Saturday, 2024/12/14 - 13:04:40
# Author.: fbnmtz, (fabiano.matoz@gmail.com)
# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~~·~·~·~·~·~·~·~
# Last Modified: Saturday, 2024/12/14 - 23:24:35
# Modified By..: @fbnmtz, (fabiano.matoz@gmail.com)
# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~~·~·~·~·~·~·~·~
# Version: 0.0.1.83
# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~~·~·~·~·~·~·~·~
# Description:
#  >
# ############################################################################
# HISTORY:
#

# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~
# shellcheck disable=SC1090,SC2154
#   * SC1090: Can't follow non-constant source. Use a directive to specify location.
#       -> cant follow or source usage
#   * SC2154: var is referenced but not assigned.
#       -> variables created by or library system (don't worry)

# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~
source "$xSHELL_INIT"
use args

xrequirements clear sleep tput xhr diff

# ~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~·~·~·~·~·~·~·~~·~·~·~·~·~
# define your arguments with 'xarg' function. Example below:
xarg --id -c,--command --var cmd+r  --desc "command to watch"
xarg --id -s,--seconds --var secs+r --desc "seconds to run again"

xhelp --header="wrapper for 'watch' command or a function on Darwin systems"

xrun --xreject-unknow --xrequire-one --xcolors --xversionrc "$@"

# define seconds to wait and run cmd again
[ -z "$secs" ] && seconds=2 || seconds=$secs

if builtin watch; then
  watch "$@"
else
  output1=/tmp/watch-output1
  output2=/tmp/watch-output2

  # clear previous outputs
  rm $output1 $output2

  while :; do
    clear
    echo "watch: '$cmd' - reload: '$seconds' secs"
    xhr -c "-"
    # eval "$cmd"
    [ -f "$output1" ] && cat $output1 > $output2
    bash -c "$cmd" > $output1
    if [ ! -f "$output2" ]; then
      cat $output1
    else
      diff -y $output1 $output2
    fi

    sleep "$seconds"
  done
fi