Utility Bash Scripts

colors.sh

#!/bin/bash

#### color codes
RESTORE=$(echo -en '\033[0m')
RED=$(echo -en '\033[00;31m')
GREEN=$(echo -en '\033[00;32m')
YELLOW=$(echo -en '\033[00;33m')
BLUE=$(echo -en '\033[00;34m')
MAGENTA=$(echo -en '\033[00;35m')
PURPLE=$(echo -en '\033[00;35m')
CYAN=$(echo -en '\033[00;36m')
LIGHTGRAY=$(echo -en '\033[00;37m')
LRED=$(echo -en '\033[01;31m')
LGREEN=$(echo -en '\033[01;32m')
LYELLOW=$(echo -en '\033[01;33m')
LBLUE=$(echo -en '\033[01;34m')
LMAGENTA=$(echo -en '\033[01;35m')
LPURPLE=$(echo -en '\033[01;35m')
LCYAN=$(echo -en '\033[01;36m')
WHITE=$(echo -en '\033[01;37m')

# Test
#echo ${RED}RED${GREEN}GREEN${YELLOW}YELLOW${BLUE}BLUE${PURPLE}PURPLE${CYAN}CYAN${WHITE}WHITE${RESTORE}
ARG=123

function foo{
 args
    :string test
    
    echo ${test}
}

echo "$(foo) ${ARG}"

functions.sh

#### sync origin with upstream ####
function syncFork() {
    if [ -z "$(git status --porcelain)" ]; then 
      # Working directory clean
      currentBranch=$(git symbolic-ref --short -q HEAD)
      checkoutMaster 
      if [ $currentBranch != "master" ] 
      then
        git checkout $currentBranch
      fi       
    else 
      # Uncommitted changes
      echo -e "\033[31m[ERROR] - Unstaged changes in directory. Please commit or stash them and continue with syncing.\033[m"
      git status
    fi
}

#### rebase current branch with latest changes from upstream ####
function rebaseThis() {
    syncFork && git rebase master
}

#### checkout master branch with latest changes from upstream ####
function checkoutMaster() {
    if [ -z "$(git status --porcelain)" ]; then
        # Working directory clean
        currentBranch=$(git symbolic-ref --short -q HEAD)
        if [ -z "$currentBranch" ] || [ $currentBranch != "master" ]; then
            echo "[\033[34mINFO\033[m] - Checking out master.."
            git checkout master 
        fi
        echo "[\033[34mINFO\033[m] - Pulling upstream and updating origin.."
        git pull upstream master:master && git push origin master
    else
      # Uncommitted changes
      echo -e "\033[31m[ERROR] - Unstaged changes in directory. Please commit or stash them before checking out master.\033[m"
      git status
    fi    
}

#### create commit with unstaged changes and open an interactive shell ####       
function createSquashCommit() {
    git add .    
    git commit -am"SQUASH-ME" && git rebase -i HEAD~2
}

## https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux
## Use this template - [\033[34mREPLACE-ME\033[m]

jarv.sh

#!/bin/bash
# WF 2018-07-12
# find out the class versions with in jar file
# see https://stackoverflow.com/questions/3313532/what-version-of-javac-built-my-jar

# uncomment do debug
# set -x

#ansi colors
#http://www.csc.uvic.ca/~sae/seng265/fall04/tips/s265s047-tips/bash-using-colors.html
blue='\033[0;34m'  
red='\033[0;31m'  
green='\033[0;32m' # '\e[1;32m' is too bright for white bg.
endColor='\033[0m'

#
# a colored message 
#   params:
#     1: l_color - the color of the message
#     2: l_msg - the message to display
#
color_msg() {
  local l_color="$1"
  local l_msg="$2"
  echo -e "${l_color}$l_msg${endColor}"
}

#
# error
#
#   show an error message and exit
#
#   params:
#     1: l_msg - the message to display
error() {
  local l_msg="$1"
  # use ansi red for error
  color_msg $red "Error: $l_msg" 1>&2
  exit 1
}

#
# show the usage
#
usage() {
  echo "usage: $0 jarfile"
  # -h|--help|usage|show this usage
  echo " -h|--help: show this usage"
  exit 1 
}

#
# showclassversions
#
showclassversions() {
  local l_jar="$1"
  jar -tf "$l_jar" | grep '.class' | while read classname
  do
    class=$(echo $classname | sed -e 's/\.class$//')
    class_version=$(javap -classpath "$l_jar" -verbose $class | grep 'major version' | cut -f2 -d ":" | cut -c2-)
    class_pretty=$(echo $class | sed -e 's#/#.#g')
    case $class_version in
      45.3) java_version="java 1.1";;
      46) java_version="java 1.2";;
      47) java_version="java 1.3";;
      48) java_version="java 1.4";;
      49) java_version="java5";;
      50) java_version="java6";;
      51) java_version="java7";;
      52) java_version="java8";;
      53) java_version="java9";;
      54) java_version="java10";;
      *) java_version="x${class_version}x";;
    esac
    echo $java_version $class_pretty
  done
}

# check the number of parameters
if [ $# -lt 1 ]
then
  usage
fi

# start of script
# check arguments
while test $# -gt 0
do
  case $1 in
    # -h|--help|usage|show this usage
    -h|--help) 
      usage
      exit 1
      ;;
    *)
     showclassversions "$1"
  esac
  shift
done