Install composer into user home bin

install-composer.sh

#!/bin/bash
#
if [ ! -f "$HOME/bin/composer.phar" ]; then
  sudo apt-get update | grep -P "\d\K upgraded"
  sudo apt-get -y install curl php-cli php-mbstring git unzip | grep -P "\d\K installed"
  if [[ ! -f "composer-setup.php" ]]; then
     php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
  fi
  HASH="$(wget -q -O - https://composer.github.io/installer.sig)"
  HASHFILE=$(php -r "echo hash_file('SHA384','composer-setup.php');")
  RESULT=$(php -r "if ('$HASHFILE' === '$HASH') { echo 'verified'; } else { echo 'corrupt'; }")
  if [ "$RESULT" != "verified" ]; then
     echo "Installer corrupted";
     exit 1;
  else
     [ ! -d "$HOME/bin" ] && mkdir $HOME/bin
     sudo php composer-setup.php --install-dir="$HOME/bin"
  fi
  rm composer-setup.php
else
  ALIAS_STRING="alias composer=$HOME/bin/composer.phar"
  ALIAS_FILE="$HOME/.bash_aliases"
  [ ! -f "$ALIAS_FILE" ] && touch $ALIAS_FILE
  grep -q -x -F "$ALIAS_STRING" "$ALIAS_FILE" || echo $ALIAS_STRING>>$ALIAS_FILE
fi
echo "now type: source ~/.profile"