commit bffe945d864799ef8f83f60911740958aa0c7572 Author: Kamran Riaz Khan krkhan@inspirated.com Date: Tue Jun 7 15:31:36 2011 +0500

Add cagraph as a prereq. --- src/prereq.py | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 66 insertions(+), 0 deletions(-)

diff --git a/src/prereq.py b/src/prereq.py index 4bda913..2e26161 100644 --- a/src/prereq.py +++ b/src/prereq.py @@ -8,6 +8,9 @@ import shutil import tempfile

TORCTL_REPO = "git://git.torproject.org/pytorctl.git" +CAGRAPH_TARBALL_URL = "http://cagraph.googlecode.com/files/cagraph-1.2.tar.gz" +CAGRAPH_TARBALL_NAME = "cagraph-1.2.tar.gz" +CAGRAPH_TARBALL_ROOT = "cagraph-1.2"

def isTorCtlAvailable(): """ @@ -20,6 +23,16 @@ def isTorCtlAvailable(): except ImportError: return False

+def isCagraphAvailable(): + """ + True if cagraph is already available on the platform, false otherwise. + """ + try: + import cagraph + return True + except ImportError: + return False + def promptTorCtlInstall(): """ Asks the user to install TorCtl. This returns True if it was installed and @@ -44,6 +57,30 @@ def promptTorCtlInstall(): print exc return False

+def promptCagraphInstall(): + """ + Asks the user to install cagraph. 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 cagraph 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 TorCtl, printing the issue if unsuccessful + try: + installCagraph() + + if not isCagraphAvailable(): + raise IOError("Unable to install cagraph, sorry") + + print "cagraph successfully installed" + return True + except IOError, exc: + print exc + return False + def installTorCtl(): """ Checks out the current git head release for TorCtl and bundles it with arm. @@ -71,6 +108,31 @@ def installTorCtl(): # of errors. shutil.rmtree(tmpFilename, ignore_errors=True)

+def installCagraph(): + """ + Downloads and extracts the cagraph tarball. + This raises an IOError if unsuccessful. + """ + + if isCagraphAvailable(): return + + tmpDir = tempfile.mkdtemp() + tmpFilename = os.path.join(tmpDir, CAGRAPH_TARBALL_NAME) + + exitStatus = os.system("wget -P %s %s" % (tmpDir, CAGRAPH_TARBALL_URL)) + if exitStatus: raise IOError("Unable to fetch cagraph from %s. Is wget installed?" % CAGRAPH_TARBALL_URL) + + # 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 && tar --strip-components=1 -xzf %s %s/cagraph)" % (ourDir, tmpFilename, CAGRAPH_TARBALL_ROOT)) + if exitStatus: raise IOError("Unable to extract cagraph to %s" % ourDir) + + # Clean up the temporary contents. This isn't vital so quietly fails in case + # of errors. + shutil.rmtree(tmpDir, ignore_errors=True) + if __name__ == '__main__': majorVersion = sys.version_info[0] minorVersion = sys.version_info[1] @@ -92,3 +154,7 @@ if __name__ == '__main__': isInstalled = promptTorCtlInstall() if not isInstalled: sys.exit(1)

+ if not isCagraphAvailable(): + isInstalled = promptCagraphInstall() + if not isInstalled: sys.exit(1) +