ShellScript よく使うパターン

# 等価
declare -r var1
readonly var1

declare -A user=([id]=1 [name]=yamada [class]=A-1)
echo ${user[id]}
echo ${user[name]}
echo ${user[class]}

echo "${user[@]}"

echo "${!user[@]}"

echo ${name:-yamada}
name=suzuki
echo ${name:-yamada}

declare -i sum
sum=5+3
echo $sum
# 8
or

echo $((sum=5+3))
#8

set -o noclobber
touch abc.txt
ps > abc.txt
# Eror

set -o noclobber
touch abc.txt
ps >| abc.txt
# overwrite

read -p $'\e[93mInstall(i) or Uninstall(u): ' action
if [ $action = 'i' ]; then
...

else
  echo 'Your iput is missig'
  read -p $'\e[93mInstall(i) or Uninstall(u): ' action
fi

files=(.bashrc .zshrc .bash_profile)
for file in ${files[@]}; do
  if [ -e $HOME/$file ]; then
  for f in *.alias; do
    ...
  done < <(ls *)
 echo ${END} >> $HOME/$file
fi
done

files=(.zshrc)
START="# import aliases start"
END="# import aliases end"
sed -i -e "/^${START}/,/^${END}/d" $HOME/$file

START="# import aliases start"
END="# import aliases end"
func_remove_text(){
sed -i -e "/^${START}/,/^${END}/d" $1
}
func_remove_text $HOME/$file

if [ $# != 1 ]; then
    echo "Please specify param"
    echo "ls: dump list"
    echo "rm: remove dumpfiles"
    exit 1
fi

for f in `find $DIR -maxdepth 1 -type f -name "*.alias"`; do
#echo "source $DIR/"${f%.*}"" >> $HOME/$file
  echo $f
  echo "source $f" >> $HOME/$file
done < <(ls *)

#Drive$B!J%"!<%+%$%V!K(B/This path
DIR=$(cd $(dirname $0); pwd)

if [ "$(uname)" == 'Darwin' ]; then
CONTAINER_PATH=~/Library/Containers/com.docker.docker/Data/vms/0/data/Docker.raw
elif [ "$(expr substr $(uname -s) 1 5)" == 'Linux' ]; then
CONTAINER_PATH=/var/lib/docker
elif [ "$(expr substr $(uname -s) 1 10)" == 'MINGW32_NT' ]; then
CONTAINER_PATH=
else
echo "Your platform ($(uname -a)) is not supported."
exit 1
fi

echo -e $'\e[96m'

docker ps --format 'table {{.Image}} {{.Names}} {{.Status}}' | column -t

while true;do
  func_docker_disk_used;sleep 30;echo ""
done

func_docker_disk_used(){
 somue
}
result=$(ls -klsh $CONTAINER_PATH)
used_total=`echo $result | awk '{ print $1 }'`
}

prog() {
    local w=80 p=$1;  shift
    clear
    # create a string of spaces, then change them to dots
    printf -v dots "%*s" "$(( $p*$w/100 ))" ""; dots=${dots// /.};
    # print those dots on a fixed-width space plus the percentage etc.
    printf "\r\e[K|%-*s| %3d %% %s" "$w" "$dots" "$p" "$*";
}
# test loop

func_after_exec(){
  for x in {1..100} ; do
      prog "$x"  working...
      sleep 0.04   # do some work here
  done ; echo
  clear
  globalIp
}

# " を削除
ip=$(echo $result | jq '.ip' | sed 's/"//g')

  if [ ! -d $SOME_PATH ]; then

  fi

  if [ ! -f $SOME_PATH ]; then

  fi

# 現在のPATHを絶対PATHへ
cd $(cd $(dirname $0); pwd)
# 現在のPATHを絶対PATHへ から移動
cd $(cd $(dirname $0)/../../../; pwd)

source ./.env

for file in "$HTML_DIR"/*.html; do

filename=$(basename "$file" | cut -f 1 -d '.')