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64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
5 years ago
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"""
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Outputs a graphviz dot file of the dependencies.
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"""
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from __future__ import print_function
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from optparse import make_option
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import re
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import textwrap
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from django.core.management.base import BaseCommand
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from django.core.management.color import no_style
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from south.migration import Migrations, all_migrations
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class Command(BaseCommand):
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help = "Outputs a GraphViz dot file of all migration dependencies to stdout."
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def handle(self, **options):
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# Resolve dependencies
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Migrations.calculate_dependencies()
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colors = [ 'crimson', 'darkgreen', 'darkgoldenrod', 'navy',
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'brown', 'darkorange', 'aquamarine' , 'blueviolet' ]
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color_index = 0
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wrapper = textwrap.TextWrapper(width=40)
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print("digraph G {")
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# Group each app in a subgraph
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for migrations in all_migrations():
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print(" subgraph %s {" % migrations.app_label())
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print(" node [color=%s];" % colors[color_index])
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for migration in migrations:
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# Munge the label - text wrap and change _ to spaces
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label = "%s - %s" % (
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migration.app_label(), migration.name())
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label = re.sub(r"_+", " ", label)
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label= "\\n".join(wrapper.wrap(label))
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print(' "%s.%s" [label="%s"];' % (
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migration.app_label(), migration.name(), label))
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print(" }")
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color_index = (color_index + 1) % len(colors)
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# For every migration, print its links.
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for migrations in all_migrations():
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for migration in migrations:
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for other in migration.dependencies:
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# Added weight tends to keep migrations from the same app
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# in vertical alignment
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attrs = "[weight=2.0]"
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# But the more interesting edges are those between apps
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if other.app_label() != migration.app_label():
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attrs = "[style=bold]"
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print(' "%s.%s" -> "%s.%s" %s;' % (
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other.app_label(), other.name(),
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migration.app_label(), migration.name(),
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attrs
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))
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print("}");
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