#!/usr/bin/env python

# We're using optparse because we need to support 2.6

# which doesn't have argparse. Given that argparse is

# a dependency that eventually gets installed, we could

# try to bootstrap, but using optparse is just easier.

import optparse

import os

import platform

import shutil

import subprocess

import sys

import tarfile

import tempfile

from contextlib import contextmanager

PACKAGES_DIR = os.path.join(

os.path.dirname(os.path.abspath(__file__)), 'packages')

INSTALL_DIR = os.path.expanduser(os.path.join(

'~', '.local', 'lib', 'aws'))

class BadRCError(Exception):

pass

@contextmanager

def cd(dirname):

original = os.getcwd()

os.chdir(dirname)

try:

yield

finally:

os.chdir(original)

def run(cmd):

sys.stdout.write("Running cmd: %s\n" % cmd)

p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,

stderr=subprocess.PIPE)

stdout, stderr = p.communicate()

if p.returncode != 0:

raise BadRCError("Bad rc (%s) for cmd '%s': %s" % (

p.returncode, cmd, stdout + stderr))

return stdout

def bin_path():

"""

Get the system's binary path, either `bin` on reasonable

systems or `Scripts` on Windows.

"""

path = 'bin'

if platform.system() == 'Windows':

path = 'Scripts'

return path

def create_install_structure(working_dir, install_dir):

if not os.path.isdir(install_dir):

os.makedirs(install_dir)

_create_virtualenv(location=install_dir, working_dir=working_dir)

def _create_virtualenv(location, working_dir):

# working_dir is used (generally somewhere in /tmp) so that we

# don't modify the install/packages directories.

with cd(PACKAGES_DIR):

venv = [p for p in os.listdir('.') if p.startswith('virtualenv')][0]

compressed = tarfile.open(venv)

compressed.extractall(path=working_dir)

compressed.close()

with cd(working_dir):

# We know that virtualenv is the only dir in this directory

# so we can listdir()[0] it.

with cd(os.listdir('.')[0]):

run(('%s virtualenv.py --no-download '

'--python %s %s') % (sys.executable,

sys.executable,

location))

def create_working_dir():

d = tempfile.mkdtemp()

return d

def pip_install_packages(install_dir):

cli_tarball = [p for p in os.listdir(PACKAGES_DIR)

if p.startswith('awscli')]

assert len(cli_tarball) == 1

cli_tarball = cli_tarball[0]

pip_script = os.path.join(install_dir, bin_path(), 'pip')

with cd(PACKAGES_DIR):

run('%s install --no-index --find-links file://%s %s' % (

pip_script, PACKAGES_DIR, cli_tarball))

def create_symlink(real_location, symlink_name):

if os.path.isfile(symlink_name):

print("Symlink already exists: %s" % symlink_name)

print("Removing symlink.")

os.remove(symlink_name)

symlink_dir_name = os.path.dirname(symlink_name)

if not os.path.isdir(symlink_dir_name):

os.makedirs(symlink_dir_name)

os.symlink(real_location, symlink_name)

return True

def main():

parser = optparse.OptionParser()

parser.add_option('-i', '--install-dir', help="The location to install "

"the AWS CLI. The default value is ~/.local/lib/aws",

default=INSTALL_DIR)

parser.add_option('-b', '--bin-location', help="If this argument is "

"provided, then a symlink will be created at this "

"location that points to the aws executable. "

"This argument is useful if you want to put the aws "

"executable somewhere already on your path, e.g. "

"-b /usr/local/bin/aws. This is an optional argument. "

"If you do not provide this argument you will have to "

"add INSTALL_DIR/bin to your PATH.")

opts = parser.parse_args()[0]

working_dir = create_working_dir()

try:

create_install_structure(working_dir, opts.install_dir)

pip_install_packages(opts.install_dir)

real_location = os.path.join(opts.install_dir, bin_path(), 'aws')

if opts.bin_location and create_symlink(real_location, opts.bin_location):

print("You can now run: %s --version" % opts.bin_location)

else:

print("You can now run: %s --version" % real_location)

finally:

shutil.rmtree(working_dir)

if __name__ == '__main__':

main()