commit d1d54c08e245083660394d0e11b41c593099fc2f Author: Damian Johnson atagar@torproject.org Date: Wed Apr 20 19:38:17 2011 -0700

Offering to install TorCtl if unavailable --- src/prereq.py | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 60 insertions(+), 0 deletions(-)

diff --git a/src/prereq.py b/src/prereq.py index 90cb03a..ee5c768 100644 --- a/src/prereq.py +++ b/src/prereq.py @@ -2,7 +2,50 @@ Provides a warning and error code if python version isn't compatible. """

+import os import sys +import shutil +import tempfile + +TORCTL_REPO = "git://git.torproject.org/pytorctl.git" + +def isTorCtlAvailable(): + """ + True if TorCtl is already available on the platform, false otherwise. + """ + + try: + import TorCtl + return True + except ImportError: + return False + +def installTorCtl(): + """ + Checks out the current git head release for TorCtl and bundles it with arm. + This raises an IOError if unsuccessful. + """ + + if isTorCtlAvailable(): return + + # temporary destination for TorCtl's git clone, guarenteed to be unoccupied + # (to avoid conflicting with files that are already there) + tmpFilename = tempfile.mktemp("/torctl") + + # fetches TorCtl + exitStatus = os.system("git clone %s %s > /dev/null" % (TORCTL_REPO, tmpFilename)) + if exitStatus: raise IOError("Unable to get TorCtl from %s. Is git installed?" % TORCTL_REPO) + + # the destination for TorCtl will be our directory + ourDir = os.path.dirname(os.path.realpath(__file__)) + + # exports TorCtl to our location + exitStatus = os.system("(cd %s && git archive --format=tar --prefix=TorCtl/ master) | (cd %s && tar xf - 2> /dev/null)" % (tmpFilename, ourDir)) + if exitStatus: raise IOError("Unable to install TorCtl 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] @@ -20,4 +63,21 @@ if __name__ == '__main__': except ImportError: print("arm requires curses - try installing the python-curses package\n") sys.exit(1) + + if not isTorCtlAvailable(): + userInput = raw_input("Arm requires TorCtl 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"): + sys.exit(1) + + # attempt to install TorCtl, printing the issue if unsuccessful + try: + installTorCtl() + + if not isTorCtlAvailable(): + raise IOError("Unable to install TorCtl, sorry") + except IOError, exc: + print exc + sys.exit(1)