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#!/usr/bin/env python
"""Script to create self contained install.
The goal of this script is simple:
* Create a self contained install of the CLI that
has requires no external resources during installation.
It does this by using all the normal python tooling
(virtualenv, pip) but provides a simple, easy to use
interface for those not familiar with the python
ecosystem.
"""
import os
import sys
import time
import subprocess
import shutil
import tempfile
import zipfile
from contextlib import contextmanager
# These are package versions that are needed to boostrap
# the installation process. It is *not* the deps required
# by awscli/botocore.
PACKAGE_VERSION = {
'virtualenv': '15.1.0',
# These packages are included because they are required for
# python2.6, but our normal dependency downloading via pip
# only works if you use python2.6. To fix this issue, we're
# explicitly saying that we need to download these packages
# even if pip doesn't think we need them. That way we can
# run make-bundle in python versions besides 2.6.
'ordereddict': '1.1',
'simplejson': '3.3.0',
'argparse': '1.2.1',
}
INSTALL_ARGS = '--allow-all-external --no-use-wheel'
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()
rc = p.wait()
if p.returncode != 0:
raise BadRCError("Bad rc (%s) for cmd '%s': %s" % (
rc, cmd, stderr + stdout))
return stdout
def create_scratch_dir():
# This creates the dir where all the bundling occurs.
# First we need a top level dir.
dirname = tempfile.mkdtemp(prefix='bundle')
# Then we need to create a dir where all the packages
# will come from.
os.mkdir(os.path.join(dirname, 'packages'))
return dirname
def download_package_tarballs(dirname, packages):
with cd(dirname):
for package in packages:
run('pip install -d . %s==%s %s' % (
package, PACKAGE_VERSION[package], INSTALL_ARGS))
def download_cli_deps(scratch_dir):
# As far as i can tell this is a bug in pip.
# Running 'pip intall -d . ~/clidir' does not work.
# Running 'pip install -d foo ~/clidir' results
# in python consuming 100% CPU.
# This problem is surprisingly hard, specifically that
# of downloading all the dependent python packages of
# the awscli as tarballs.
# So here's what we do.
# Step one create a virtualenv.
venv_dir = tempfile.mkdtemp()
run('virtualenv %s' % venv_dir)
pip = os.path.join(venv_dir, 'bin', 'pip')
assert os.path.isfile(pip)
awscli_dir = os.path.dirname(
os.path.dirname(os.path.abspath(__file__)))
with cd(scratch_dir):
run('%s install %s -d . -e %s' % (pip, INSTALL_ARGS, awscli_dir))
# Remove the awscli package, we'll create our own sdist.
_remove_cli_zip(scratch_dir)
def _remove_cli_zip(scratch_dir):
clidir = [f for f in os.listdir(scratch_dir) if f.startswith('awscli')]
assert len(clidir) == 1
os.remove(os.path.join(scratch_dir, clidir[0]))
def add_cli_sdist(scratch_dir):
awscli_dir = os.path.dirname(
os.path.dirname(os.path.abspath(__file__)))
if os.path.exists(os.path.join(awscli_dir, 'dist')):
shutil.rmtree(os.path.join(awscli_dir, 'dist'))
with cd(awscli_dir):
run('python setup.py sdist')
filename = os.listdir('dist')[0]
shutil.move(os.path.join('dist', filename),
os.path.join(scratch_dir, filename))
def create_bootstrap_script(scratch_dir):
install_script = os.path.join(
os.path.dirname(os.path.abspath(__file__)), 'install')
shutil.copy(install_script, os.path.join(scratch_dir, 'install'))
def zip_dir(scratch_dir):
basename = 'awscli-bundle.zip'
dirname, tmpdir = os.path.split(scratch_dir)
final_dir_name = os.path.join(dirname, 'awscli-bundle')
if os.path.isdir(final_dir_name):
shutil.rmtree(final_dir_name)
shutil.move(scratch_dir, final_dir_name)
with cd(dirname):
with zipfile.ZipFile(basename, 'w', zipfile.ZIP_DEFLATED) as zipped:
for root, dirnames, filenames in os.walk('awscli-bundle'):
for filename in filenames:
zipped.write(os.path.join(root, filename))
return os.path.join(dirname, basename)
def verify_preconditions():
# The pip version looks like:
# 'pip 1.4.1 from ....'
pip_version = run('pip --version').strip().split()[1]
# Virtualenv version just has the version string: '1.14.5\n'
virtualenv_version = run('virtualenv --version').strip()
_min_version_required('1.5.0', pip_version, 'pip')
_min_version_required('1.11.4', virtualenv_version, 'virtualenv')
def _min_version_required(min_version, actual_version, name):
# precondition: min_version is major.minor.patch
# actual_version is major.minor.patch
min_split = map(int, min_version.split('.'))
actual_split = map(int, actual_version.split('.'))
if actual_split < min_split:
raise ValueError("%s requires at least version %s, but "
"version %s was found." % (name, min_version,
actual_version))
def main():
verify_preconditions()
scratch_dir = create_scratch_dir()
package_dir = os.path.join(scratch_dir, 'packages')
print("Bundle dir at: %s" % scratch_dir)
download_package_tarballs(
package_dir,
packages=['virtualenv', 'ordereddict', 'simplejson', 'argparse'])
download_cli_deps(package_dir)
add_cli_sdist(package_dir)
create_bootstrap_script(scratch_dir)
zip_filename = zip_dir(scratch_dir)
print("Zipped bundle installer is at: %s" % zip_filename)
if __name__ == '__main__':
main()