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""" Produce graphviz diagrams of metadata structures """
import getopt
from subprocess import Popen, PIPE
import pipes
import Bcfg2.Server.Admin
class Viz(Bcfg2.Server.Admin.MetadataCore):
""" Produce graphviz diagrams of metadata structures """
__usage__ = ("[options]\n\n"
" %-32s%s\n"
" %-32s%s\n"
" %-32s%s\n"
" %-32s%s\n"
" %-32s%s\n" %
("-H, --includehosts",
"include hosts in the viz output",
"-b, --includebundles",
"include bundles in the viz output",
"-k, --includekey",
"show a key for different digraph shapes",
"-c, --only-client <clientname>",
"show only the groups, bundles for the named client",
"-o, --outfile <file>",
"write viz output to an output file"))
colors = ['steelblue1', 'chartreuse', 'gold', 'magenta',
'indianred1', 'limegreen', 'orange1', 'lightblue2',
'green1', 'blue1', 'yellow1', 'darkturquoise', 'gray66']
__plugin_blacklist__ = ['DBStats', 'Snapshots', 'Cfg', 'Pkgmgr',
'Packages', 'Rules', 'Account', 'Decisions',
'Deps', 'Git', 'Svn', 'Fossil', 'Bzr', 'Bundler',
'TGenshi', 'Base']
def __call__(self, args):
# First get options to the 'viz' subcommand
try:
opts, args = getopt.getopt(args, 'Hbkc:o:',
['includehosts', 'includebundles',
'includekey', 'only-client=',
'outfile='])
except getopt.GetoptError:
self.usage()
hset = False
bset = False
kset = False
only_client = None
outputfile = False
for opt, arg in opts:
if opt in ("-H", "--includehosts"):
hset = True
elif opt in ("-b", "--includebundles"):
bset = True
elif opt in ("-k", "--includekey"):
kset = True
elif opt in ("-c", "--only-client"):
only_client = arg
elif opt in ("-o", "--outfile"):
outputfile = arg
data = self.Visualize(hset, bset, kset, only_client, outputfile)
if data:
print(data)
def Visualize(self, hosts=False, bundles=False, key=False,
only_client=None, output=None):
"""Build visualization of groups file."""
if output:
fmt = output.split('.')[-1]
else:
fmt = 'png'
cmd = ["dot", "-T", fmt]
if output:
cmd.extend(["-o", output])
try:
dotpipe = Popen(cmd, stdin=PIPE, stdout=PIPE, close_fds=True)
except OSError:
# on some systems (RHEL 6), you cannot run dot with
# shell=True. on others (Gentoo with Python 2.7), you
# must. In yet others (RHEL 5), either way works. I have
# no idea what the difference is, but it's kind of a PITA.
cmd = ["dot", "-T", pipes.quote(fmt)]
if output:
cmd.extend(["-o", pipes.quote(output)])
dotpipe = Popen(cmd, shell=True,
stdin=PIPE, stdout=PIPE, close_fds=True)
try:
dotpipe.stdin.write("digraph groups {\n")
except:
print("write to dot process failed. Is graphviz installed?")
raise SystemExit(1)
dotpipe.stdin.write('\trankdir="LR";\n')
dotpipe.stdin.write(self.metadata.viz(hosts, bundles,
key, only_client, self.colors))
if key:
dotpipe.stdin.write("\tsubgraph cluster_key {\n")
dotpipe.stdin.write('\tstyle="filled";\n')
dotpipe.stdin.write('\tcolor="lightblue";\n')
dotpipe.stdin.write('\tBundle [ shape="septagon" ];\n')
dotpipe.stdin.write('\tGroup [shape="ellipse"];\n')
dotpipe.stdin.write('\tProfile [style="bold", shape="ellipse"];\n')
dotpipe.stdin.write('\tHblock [label="Host1|Host2|Host3", '
'shape="record"];\n')
dotpipe.stdin.write('\tlabel="Key";\n')
dotpipe.stdin.write("\t}\n")
dotpipe.stdin.write("}\n")
dotpipe.stdin.close()
return dotpipe.stdout.read()
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