Fixes #3973 live output for ansible-pull

Add a -v/--verbose option to ansible-pull to allow passing -vvvv to
ansible-playbook and to show stdout while the playbook executes

bin/ansible-pull

@@ -45,6 +45,8 @@ import sys
 import datetime
 import socket
 from ansible import utils
+import shlex
+import select
 
 DEFAULT_REPO_TYPE = 'git'
 DEFAULT_PLAYBOOK = 'local.yml'
@@ -52,6 +54,38 @@ PLAYBOOK_ERRORS = {1: 'File does not exist',
                     2: 'File is not readable'}
 
 
+def _run_verbose(cmd):
+    cmdargs = shlex.split(cmd)
+    p = subprocess.Popen(cmdargs, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    
+    stdout = ''
+    stderr = ''
+    rpipes = [p.stdout, p.stderr]
+    while True:
+        rfd, wfd, efd = select.select(rpipes, [], rpipes, 1)
+
+        if p.stdout in rfd:
+            dat = os.read(p.stdout.fileno(), 100)
+            sys.stdout.write(dat)
+            stdout += dat
+            if dat == '':
+                rpipes.remove(p.stdout)
+        if p.stderr in rfd:
+            dat = os.read(p.stderr.fileno(), 100)
+            stderr += dat
+            sys.stdout.write(dat)
+            if dat == '':
+                rpipes.remove(p.stderr)
+        # only break out if we've emptied the pipes, or there is nothing to
+        # read from and the process has finished.
+        if (not rpipes or not rfd) and p.poll() is not None:
+            break
+        # Calling wait while there are still pipes to read can cause a lock
+        elif not rpipes and p.poll() == None:
+            p.wait()
+
+    return p.returncode, stdout
+
 def _run(cmd):
     print >>sys.stderr, "Running: '%s'" % cmd
     cmd = subprocess.Popen(cmd, shell=True,
@@ -102,6 +136,8 @@ def main(args):
     """ Set up and run a local playbook """
     usage = "%prog [options] [playbook.yml]"
     parser = utils.SortedOptParser(usage=usage)
+    parser.add_option('-v', '--verbose', default=False, action='store_true',
+                      help='Print the ansible-playbook output while running')
     parser.add_option('--purge', default=False, action='store_true',
                       help='purge checkout after playbook run')
     parser.add_option('-o', '--only-if-changed', dest='ifchanged', default=False, action='store_true',
@@ -141,7 +177,10 @@ def main(args):
 
     inv_opts = 'localhost,'
     limit_opts = 'localhost:%s:127.0.0.1' % hostname
+    if not options.verbose:
         base_opts = '-c local --limit "%s"' % limit_opts
+    else:
+        base_opts = '-vvvv -c local --limit "%s"' % limit_opts
     repo_opts = "name=%s dest=%s" % (options.url, options.dest)
     if options.checkout:
         repo_opts += ' version=%s' % options.checkout
@@ -172,7 +211,10 @@ def main(args):
     if options.inventory:
         cmd += ' -i "%s"' % options.inventory
     os.chdir(options.dest)
+    if not options.verbose:
         rc, out = _run(cmd)
+    else:
+        rc, out = _run_verbose(cmd)
 
     if options.purge:
         os.chdir('/')