commit fb1d2d2d1b2ff1cefa4eba210d190addd9d1d911 Author: Damian Johnson atagar@torproject.org Date: Thu Jan 9 09:09:23 2014 -0800

Revised script for starting arm

Swapping run_arm from sh to python and having it do our prereq checks. This removes our fancy auto-install functionality which, while convenient, was insecure. People should install stem from their repositories.

This also bumps our dependency from python 2.5 to 2.6, so we match stem's dependencies. --- arm/prereq.py | 141 --------------------------------------------------------- run_arm | 54 +++++++++++++++++----- run_tests.py | 1 + runner.py | 3 -- 4 files changed, 43 insertions(+), 156 deletions(-)

diff --git a/arm/prereq.py b/arm/prereq.py deleted file mode 100644 index 1813662..0000000 --- a/arm/prereq.py +++ /dev/null @@ -1,141 +0,0 @@ -""" -Provides a warning and error code if python version isn't compatible. -""" - -import os -import sys -import shutil -import urllib -import hashlib -import tarfile -import tempfile - -# Library dependencies can be fetched on request. By default this is via -# the following mirrors with their sha256 signatures checked. -#STEM_ARCHIVE = "http://www.atagar.com/arm/resources/deps/11-06-16/torctl.tar.gz" -#STEM_SIG = "5460adb1394c368ba492cc33d6681618b3d3062b3f5f70b2a87520fc291701c3" - -# optionally we can do an unverified fetch from the library's sources -STEM_REPO = "git://git.torproject.org/stem.git" - -def isStemAvailable(): - """ - True if stem is already available on the platform, false otherwise. - """ - - try: - import stem - return True - except ImportError: - return False - -def promptStemInstall(): - """ - Asks the user to install stem. This returns True if it was installed and - False otherwise (if it was either declined or failed to be fetched). - """ - - userInput = raw_input("Arm requires stem to run, but it's unavailable. Would you like to install it? (y/n): ") - - # if user says no then terminate - if not userInput.lower() in ("y", "yes"): return False - - # attempt to install stem, printing the issue if unsuccessful - try: - #fetchLibrary(STEM_ARCHIVE, STEM_SIG) - installStem() - - if not isStemAvailable(): - raise IOError("Unable to install stem, sorry") - - print "Stem successfully installed" - return True - except IOError, exc: - print exc - return False - -def fetchLibrary(url, sig): - """ - Downloads the given archive, verifies its signature, then installs the - library. This raises an IOError if any of these steps fail. - - Arguments: - url - url from which to fetch the gzipped tarball - sig - sha256 signature for the archive - """ - - tmpDir = tempfile.mkdtemp() - destination = tmpDir + "/" + url.split("/")[-1] - urllib.urlretrieve(url, destination) - - # checks the signature, reading the archive in 256-byte chunks - m = hashlib.sha256() - fd = open(destination, "rb") - - while True: - data = fd.read(256) - if not data: break - m.update(data) - - fd.close() - actualSig = m.hexdigest() - - if sig != actualSig: - raise IOError("Signature of the library is incorrect (got '%s' rather than '%s')" % (actualSig, sig)) - - # extracts the tarball - tarFd = tarfile.open(destination, 'r:gz') - tarFd.extractall("src/") - tarFd.close() - - # clean up the temporary contents (fails quietly if unsuccessful) - shutil.rmtree(destination, ignore_errors=True) - -def installStem(): - """ - Checks out the current git head release for stem and bundles it with arm. - This raises an IOError if unsuccessful. - """ - - if isStemAvailable(): return - - # temporary destination for stem's git clone, guarenteed to be unoccupied - # (to avoid conflicting with files that are already there) - tmpFilename = tempfile.mktemp("/stem") - - # fetches stem - exitStatus = os.system("git clone --quiet %s %s > /dev/null" % (STEM_REPO, tmpFilename)) - if exitStatus: raise IOError("Unable to get stem from %s. Is git installed?" % STEM_REPO) - - # the destination for stem will be our directory - ourDir = os.path.dirname(os.path.realpath(__file__)) - - # exports stem to our location - exitStatus = os.system("(cd %s && git archive --format=tar master stem) | (cd %s && tar xf - 2> /dev/null)" % (tmpFilename, ourDir)) - if exitStatus: raise IOError("Unable to install stem to %s" % ourDir) - - # Clean up the temporary contents. This isn't vital so quietly fails in case - # of errors. - shutil.rmtree(tmpFilename, ignore_errors=True) - -if __name__ == '__main__': - majorVersion = sys.version_info[0] - minorVersion = sys.version_info[1] - - if majorVersion > 2: - print("arm isn't compatible beyond the python 2.x series\n") - sys.exit(1) - elif majorVersion < 2 or minorVersion < 5: - print("arm requires python version 2.5 or greater\n") - sys.exit(1) - - if not isStemAvailable(): - isInstalled = promptStemInstall() - if not isInstalled: sys.exit(1) - - try: - import curses - except ImportError: - print("arm requires curses - try installing the python-curses package\n") - sys.exit(1) - diff --git a/run_arm b/run_arm index cbe74d6..0e823d4 100755 --- a/run_arm +++ b/run_arm @@ -1,17 +1,47 @@ -#!/bin/sh +#!/usr/bin/env python +# Copyright 2014, Damian Johnson and The Tor Project +# See LICENSE for licensing information

-# Also looking in /bin/arm because of the UsrMove feature on Fedora... -# https://trac.torproject.org/5973 +import sys

-if [ "$0" = /usr/bin/arm ] || [ "$0" = /bin/arm ]; then - arm_base=/usr/share/arm/ -else - arm_base=$( dirname "$0" )/arm/ -fi +import arm.starter

-python "${arm_base}prereq.py" $* +def main(): + try: + _check_prereq() + except ImportError as exc: + print exc + sys.exit(1)

-if [ $? = 0 ]; then - exec python "runner.py" $* -fi + arm.starter.main()

+ +def _check_prereq(): + """ + Checks for arm's prerequisistes... + + * python 2.6 or later + * stem + * curses + + :raises: **ImportError** if any of our prerequisites aren't met + """ + + major_version, minor_version = sys.version_info[0:2] + + if major_version < 2 or (major_version == 2 and minor_version < 6): + raise ImportError("arm requires python version 2.6 or greater") + + try: + import stem + except ImportError: + raise ImportError("arm requires stem, try running 'sudo apt-get install python-stem'") + + try: + import curses + except ImportError: + raise ImportError("arm requires curses, try running 'sudo apt-get install python-curses'") + + +if __name__ == '__main__': + main() diff --git a/run_tests.py b/run_tests.py index 1553da8..dd7ff98 100755 --- a/run_tests.py +++ b/run_tests.py @@ -28,6 +28,7 @@ SRC_PATHS = [os.path.join(ARM_BASE, path) for path in ( 'arm', 'test', 'run_tests.py', + 'run_arm', )]

diff --git a/runner.py b/runner.py deleted file mode 100644 index 78ba482..0000000 --- a/runner.py +++ /dev/null @@ -1,3 +0,0 @@ -import arm.starter - -arm.starter.main()