install.sh

#!/bin/bash

{ # this ensures the entire script is downloaded #

is_installed() {
  type "$1" > /dev/null 2>&1
}

if [ -z "$DUNITER_DIR" ]; then
  DUNITER_DIR="$HOME/.duniter"
fi

latest_version() {
  echo "v0.20.0a84"
}

repo_url() {
  echo "https://github.com/duniter/duniter.git"
}

download() {
  if is_installed "curl"; then
    curl -qkL $*
  elif is_installed "wget"; then
    # Emulate curl with wget
    ARGS=$(echo "$*" | command sed -e 's/--progress-bar /--progress=bar /' \
                           -e 's/-L //' \
                           -e 's/-I /--server-response /' \
                           -e 's/-s /-q /' \
                           -e 's/-o /-O /' \
                           -e 's/-C - /-c /')
    wget $ARGS
  fi
}

install_from_git() {

  local PREVIOUS_PATH
  PREVIOUS_PATH=$PATH
  if [ -d "$DUNITER_DIR/.git" ]; then
    echo "=> duniter is already installed in $DUNITER_DIR, trying to update using git"
    printf "\r=> "
    cd "$DUNITER_DIR" && (command git fetch 2> /dev/null || {
      echo >&2 "Failed to update duniter, run 'git fetch' in $DUNITER_DIR yourself." && exit 1
    })
  else
    # Cloning to $DUNITER_DIR
    echo "=> Downloading duniter from git to '$DUNITER_DIR'"
    printf "\r=> "
    mkdir -p "$DUNITER_DIR"
    command git clone "$(repo_url)" "$DUNITER_DIR"
  fi
  cd "$DUNITER_DIR" && command git checkout --quiet $(latest_version)
  if [ ! -z "$(cd "$DUNITER_DIR" && git show-ref refs/heads/master)" ]; then
    if git branch --quiet 2>/dev/null; then
      cd "$DUNITER_DIR" && command git branch --quiet -D master >/dev/null 2>&1
    else
      echo >&2 "Your version of git is out of date. Please update it!"
      cd "$DUNITER_DIR" && command git branch -D master >/dev/null 2>&1
    fi
  fi

  # Download Nodejs
  local NVER="5.9.1";
  local ARCH="x86"
  local X64=`uname -a | grep "x86_64"`
  local ARM=`uname -a | grep "arm"`
  if [ ! -z "$X64" ]; then
    ARCH="x64"
  fi
  # ARM processors
  if [ ! -z "$ARM" ]; then
    ARCH="`uname -m`"
  fi
  local NODEJS_FILENAME=node-v${NVER}-linux-${ARCH}
  local NODEJS_TARBALL=http://nodejs.org/dist/v${NVER}/${NODEJS_FILENAME}.tar.gz
  local NODEJS_ARCHIVE=$DUNITER_DIR/node.tar.gz
  local NODEJS_EXTRACTED=$DUNITER_DIR/$NODEJS_FILENAME
  if [ ! -d "$DUNITER_DIR/node" ]; then
    echo "=> Downloading '$NODEJS_TARBALL' to '$NODEJS_ARCHIVE'"
    download "$NODEJS_TARBALL" -o "$NODEJS_ARCHIVE" || {
      echo >&2 "Failed to download '$NODEJS_TARBALL'"
      return 4
    }
    tar xzf $NODEJS_ARCHIVE || {
      echo >&2 "Failed to extract '$NODEJS_ARCHIVE'"
      return 5
    }
    mv $NODEJS_FILENAME "node" || {
      echo >&2 "Failed to extract '$NODEJS_ARCHIVE'"
      return 6
    }
  fi

  # Install Duniter dependencies (NPM modules)
  NODE=$DUNITER_DIR/node/bin/node
  NPM=$DUNITER_DIR/node/bin/npm
  $NPM install
  return
}

#
# Detect profile file if not specified as environment variable
# (eg: PROFILE=~/.myprofile)
# The echo'ed path is guaranteed to be an existing file
# Otherwise, an empty string is returned
#
detect_profile() {

  local DETECTED_PROFILE
  DETECTED_PROFILE=''
  local SHELLTYPE
  SHELLTYPE="$(basename /$SHELL)"

  if [ $SHELLTYPE = "bash" ]; then
    if [ -f "$HOME/.bashrc" ]; then
      DETECTED_PROFILE="$HOME/.bashrc"
    elif [ -f "$HOME/.bash_profile" ]; then
      DETECTED_PROFILE="$HOME/.bash_profile"
    fi
  elif [ $SHELLTYPE = "zsh" ]; then
    DETECTED_PROFILE="$HOME/.zshrc"
  fi

  if [ -z $DETECTED_PROFILE ]; then
    if [ -f "$PROFILE" ]; then
      DETECTED_PROFILE="$PROFILE"
    elif [ -f "$HOME/.profile" ]; then
      DETECTED_PROFILE="$HOME/.profile"
    elif [ -f "$HOME/.bashrc" ]; then
      DETECTED_PROFILE="$HOME/.bashrc"
    elif [ -f "$HOME/.bash_profile" ]; then
      DETECTED_PROFILE="$HOME/.bash_profile"
    elif [ -f "$HOME/.zshrc" ]; then
      DETECTED_PROFILE="$HOME/.zshrc"
    fi
  fi

  if [ ! -z $DETECTED_PROFILE ]; then
    echo "$DETECTED_PROFILE"
  fi
}

do_install() {

  # Check required commands
  if ! is_installed "git"; then
    echo "=> git is not available. You will likely need to install 'git' package."
    exit 1
  fi
  if ! is_installed "curl"; then
    echo "=> curl is not available. You will likely need to install 'curl' package."
    exit 1
  fi
  if ! is_installed "make"; then
    echo "=> make is not available. You will likely need to install 'build-essential' package."
    exit 1
  fi
  if ! is_installed "g++"; then
    echo "=> g++ is not available. You will likely need to install 'build-essential' package."
    exit 1
  fi
  if ! is_installed "python"; then
    echo "=> python is not available. You will likely need to install 'python' package."
    exit 1
  fi

  install_from_git

  echo

  local PROFILE
  PROFILE=$(detect_profile)

  SOURCE_STR="\nexport DUNITER_DIR=\"$DUNITER_DIR\"\n[ -s \"\$DUNITER_DIR/duniter.sh\" ] && . \"\$DUNITER_DIR/duniter.sh\"  # This loads duniter.sh"

  if [ -z "$PROFILE" ] ; then
    echo "=> Profile not found. Tried $PROFILE (as defined in \$PROFILE), ~/.bashrc, ~/.bash_profile, ~/.zshrc, and ~/.profile."
    echo "=> Create one of them and run this script again"
    echo "=> Create it (touch $PROFILE) and run this script again"
    echo "   OR"
    echo "=> Append the following lines to the correct file yourself:"
    printf "$SOURCE_STR"
    echo
  else
    if ! command grep -qc '/duniter.sh' "$PROFILE"; then
      echo "=> Appending source string to $PROFILE"
      printf "$SOURCE_STR\n" >> "$PROFILE"
    else
      echo "=> Source string already in $PROFILE"
    fi
  fi
  echo "===> !Run the command 'source" $PROFILE"' to start using duniter! <==="
  reset
}

#
# Unsets the various functions defined
# during the execution of the install script
#
reset() {
  unset -f reset is_installed latest_version \
    download install_from_git \
    detect_profile do_install
}

[ "_$DUNITER_ENV" = "_testing" ] || do_install $1

} # this ensures the entire script is downloaded #