install_conda-python

#!/bin/bash
set -e

# ----------------------------------------------------------------------------
if [[ "$OSTYPE" == 'linux'* ]]; then
  OPTS=$(getopt -o c:i:l:n:p:huv \
    --long add-channel:,installer-path:,add-packages:,python-version:,prefix:,help,update,version \
    -n "${0##*/}" -- "$@") || { echo "Terminating..." >&2; exit 1 ; }
  eval set -- "$OPTS"
fi

version(){
cat<<EOF
${0##*/} 2019.02.1

Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Written by Yaswant Pradhan.
EOF
}
usage(){
cat<<EOF
${0##*/} Install Miniconda Python environment and additional packages in Linux or MacOSX system.


Usage: ${0##*/} [OPTION]

Options:
  -c, --add-channel[=CHANNEL]           add a new value to channels so conda looks for packages in this location
  -i, --installer-path[=PATH]           install from specific installer script. By default, the script will attempt downloading the required installer script from the continuum repository at https://repo.continuum.io/miniconda
  -l, --add-packages[='PACKAGE LIST']   install additional packages (package names separated by white space, eg -l 'numpy scipy pandas') following succesful installation of miniconda python environment
  -n, --python-version[=VALUE]          specify Python version to install. Default is to install latest version of Python 3
  -p, --prefix[=PATH]                   specify full path where the environment will be installed. Default is ${HOME}
  -u, --update                          update an existing installation
  -h, --help                            print this help and exit
  -v, --version                         print version and exit

Examples:
  ${0##*/} -c conda-forge -l 'iris xlrd' -p $SCRATCH -u  will add conda-forge priority channel and install/update Python $PYTHON_VERSION environment in $SCRATCH, and install iris and xlrd packages subsequently.

Report bugs to <yaswant.pradhan>
EOF
}
# ----------------------------------------------------------------------------
# Defaults
PYTHON_VERSION=3
MACHINE=$(uname -m)
OS=$(uname -s)
CONDA_REPO='https://repo.continuum.io/miniconda'
CHANNEL=
PACKAGES=
UPDATE_FLAG=
PREFIX=$HOME

while true; do
  case "$1" in
    -c |--add-channel)    CHANNEL="$2"        ; shift 2 ;;
    -i |--installer-path) INSTALLER="$2"      ; shift 2 ;;
    -l |--add-packages)   PACKAGES="$2"       ; shift 2 ;;
    -n |--python-version) PYTHON_VERSION="$2" ; shift 2 ;;
    -p |--prefix)         PREFIX="$2"         ; shift 2 ;;
    -u |--update)         UPDATE_FLAG=' -u '  ; shift 1 ;;
    -h |--help )          usage; exit 0 ;;
    -v |--version )       version; exit 0 ;;
    -- )                  shift; break ;;
    * )                   break ;;
  esac
done

[[ "$OS" == 'Darwin' ]] && OS=MacOSX

[ -e "$INSTALLER" ] \
  || INSTALLER="Miniconda${PYTHON_VERSION}-latest-${OS}-${MACHINE}.sh"
export INSTALL_PATH="${PREFIX}/miniconda${PYTHON_VERSION}"

echo "----------------------------------------------"
echo "Python Version: $PYTHON_VERSION"
echo "Priority Channel: ${CHANNEL:-None}"
echo "Additional Packages: ${PACKAGES:-None}"
echo "Miniconda installer: ${INSTALLER:-None}"
echo "Installing in path: $INSTALL_PATH"
echo "----------------------------------------------"

read -rp "Continue y|[n]: " opt
[[ "$opt" != 'y' ]] && exit 0

# Download installer if required
if [ ! -f "$INSTALLER" ]; then
  echo -e "$(date +%T) Downloading Miniconda installer ${CONDA_REPO}/${INSTALLER}\n"
  cd "$TMPDIR"
  [ -f "$INSTALLER" ] || curl -L -O "${CONDA_REPO}/${INSTALLER}"
fi

# Install conda and Python
echo -e "$(date +%T) Installing Python${PYTHON_VERSION} using $INSTALLER\n"
bash "$INSTALLER" -b "$UPDATE_FLAG" -p "$INSTALL_PATH"

# Add priority channel
if [[ "$CHANNEL" ]]; then
  echo -e "$(date +%T) Adding $CHANNEL channel with highest priority\n"
  "${INSTALL_PATH}"/bin/conda config --add channels "$CHANNEL"
fi

if [[ "$PACKAGES" ]]; then
  echo -e "$(date +%T) Installing additional packages: ${PACKAGES[*]}\n"
  "${INSTALL_PATH}"/bin/conda install -y --update-deps "${PACKAGES[*]}"
fi

# Housekeep clean up
echo -e "$(date +%T) Cleaning-up Miniconda packages and caches\n"
"${INSTALL_PATH}"/bin/conda clean -ay