which bash # where is placed bash

  #!/bin/bash

  path=~/Docs

  "$path" or "${path}"

  ./script.sh arg1 arg2 arg3 … argN

  "$1" # first argument
  "$2" # second argument
  "$0" # name of script
  "$#" # count of arguments
  "$@" # all arguments is concatenated in one string,
       # each argument is represented as one word

  #!/bin/bash
  echo "Hello, world!"

  # ./hw.sh - how this script should be called

  #!/bin/bash

  var1="$1"
  var2="$2"

  echo "Arguments are \$1=${var1} \$2=${var2}"

  # ./variables.sh Hello world - how this script should be called

  chmod +x <filename>

  if [[ condition ]]
  then
    # an action, if condition is true
  fi

  -z <string> # string is empty
  -n <string> # string is not empty
  <str1> == <str2> # strings are equal
  <str1> != <str2> # strings are not equal

  <numbers/strings> operation <numbers/strings>
  -eq, (==) # equal
  -ne, (!=) # not equal
  -lt, (<) # less than
  -le # less than or equal
  -gt, (>) # more than
  -ge # more than or equal

  -e <path> # path is exist
  -f <path> # is file
  -d <path> # is directory
  -s <path> # file size more than 0
  -x <path> # file is executable

  ! # denial of boolean expression
  && # boolean "and"
  || # boolean "or"

  if [[ condition ]]
  then
    # action, if condition is true
  else
    # action, if condition is false
  fi

  break # break loop
  continue # go to the next value of i

  #!/bin/bash

  if [[ -f "$1" ]]
  then
    echo "Removing file"
    rm "$1"
  elif [[ -d "$1" ]]
  then
    echo "Removing dir"
    rm -r "$1"
  else
    echo "Cannot remove ${1}"
  fi

  #!/bin/bash

  # ./case_in_esac.sh 2 1
  # Creating dir 1
  # ./case_in_esac.sh 1 2
  # Creating file 2

  if [[ "$#" -ne 2 ]]
  then
    echo "You should specify exactly two arguments!"
  else
    case "$1" in
      1)
        echo "Creating file ${2}"
        touch "$2"
      ;;
      2)
        echo "Creating dir ${2}"
        mkdir "$2"
      ;;
      *)
        echo "Wrong value"
      ;;
  esac
  fi

  for i in array
  do
    # an action, i on every iteration is getting
    # the next value from array
  done

  while [ condition ]
  do
    # an action, while condition is true
  done

  #!/bin/bash
  # while.sh

  again="yes"

  while [ "$again" = "yes" ]
  do
    echo "Please enter a name:"
    read name # !!!
    echo "The name you entered is ${name}"

    echo "Do you wish to continue? (yes/no)"
    read again # !!!
  done

  git diff origin/master origin/<branch-name> > ~/<path_to_directory>/diff/diff-<branch-name>.diff

  <branch-name> # a name of the branch to which you want to create a diff
  <path_to_directory> # a name of the folder where to save the file with diff

  #!/bin/bash

  PATH_TO_DIFF_DIR="${HOME}/diff/"
  FILE_EXTENTION=".diff"

  USER_NAME="<user_name>"
  USER_PASSWORD="<user_password>"
  PROJECT_NAME="<project_name>"

  # if "$1" is empty
  if [ -z "$1" ]
  then
    echo "Please, specify an issue ID"
    exit 0
  fi

  issue_id="$1"
  branch=$(git rev-parse --abbrev-ref HEAD)

  # Get the first line of git remote output and cut a path to repository
  repository=$(git remote -v | head -n1 | sed "s/^origin.*\/\(.*\)\.git\s(.*)/\1/")
  file_name="${branch}-${repository}${FILE_EXTENTION}"

  # path to diff directory with <filename>.diff
  path_to_diff="${PATH_TO_DIFF_DIR}${file_name}"

  diffMaster() {
    git diff "origin/master origin/${branch}" > "$path_to_diff"
  }

  attachDiff() {
    curl -D -u "${USER_NAME}":"${USER_PASSWORD}" -X POST -H "X-Atlassian-Token: no-check" -F "file=@${path_to_diff};type=text/x-diff" "https://jira.${PROJECT_NAME}.com/rest/api/2/issue/${issue_id}/attachments"
  }

  diffMaster && attachDiff

  # Usage: cd <repo_name> && fast_diff_v2.sh <issue_id>
  # <issue_id> should include your company prefix (ABC, XYZ, XX, etc.)
  # At instance, "./fast_diff_v2.sh XYZ-135" will try to attach diff to
  # https://jira.<project_name>.com/browse/XYZ-135

  #!/bin/bash

  # up_repo.sh - check repositories in core/vendor
  # find all directories that included .git
  # If any repo hasn't switched on master branch
  # than git checkout master && git branch && git pull
  # else git branch && git pull

  # get list of repositories
  findRepo() {
    REPO_NAME="terminalForCoder__WSD"
    PATH_TO_VENDORS_REPO="${HOME}/${REPO_NAME}/bash/core/vendors/"

    # find all git repositories in $PATH_TO_VENDORS_REPO
    # filter by /.git

    if [[ -e "$PATH_TO_VENDORS_REPO" ]]
    then
      r=$( find "$PATH_TO_VENDORS_REPO" -name .git | xargs | sed "s/\\/.git//g" )
    else
      echo "Cannot find ${PATH_TO_VENDORS_REPO}"
      echo "Try to edit REPO_NAME in ${0}"
      exit 0
    fi

    # do check repositories stuff
    checkBranch $r
  }

  # do check repositories stuff
  checkBranch() {
    BRANCH="master"
    CHECK_BRANCH="* master"

    # $i is an item in $r
    for i in "$@"
    do
      # get current branch name
      b=$(cd "$i" && git branch | grep \*)
      echo "repo: ${i}"
      echo "current brunch: ${b}"

      # check branch
      if [[ "$b" != "$CHECK_BRANCH" ]]
      then
        echo "!Error! ${i} is not on ${BRANCH} branch"
        echo "Current branch is ${b}"
        echo "Checkout to ${BRANCH} and do git pull stuff for ${i}"
        cd "$i" && git checkout "$BRANCH" && git branch && git pull origin "$BRANCH"
        echo ""
      else
        echo "Do git pull stuff for ${i}"
        cd "$i" && git branch && git pull origin "$BRANCH"
        echo ""
      fi
    done
    echo "Done. Congratulation, you win!"
  }

  findRepo "$@"

  # User specific aliases and functions
  alias gst='git status'
  alias gf='git fetch'
  alias gm='git merge'
  alias gd='git diff'
  alias gb='git branch'
  alias gbm='git branch --merged'
  alias gcm='git commit -m'
  alias gp='git push origin'
  alias gbd='git branch -D'
  alias gshorth='git log -p -2'
  alias gch='git checkout'
  alias grntds='./grunt deploySync'
  alias grntd='./grunt deploy'
  alias ghide='git stash'
  alias gshow='git stash pop'
  alias gsl='git stash list'
  alias myps='ps aux | grep rybka'
  alias gmom='git merge origin/master'
  alias gad='git add'
  alias grm='git rm'
  alias showaliases='cat $HOME/.bashrc | grep alias'