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#!/usr/bin/python
# Usage (the graphviz package must be installed in your distribution)
# ./scripts/graph-depends [package-name] > test.dot
# dot -Tpdf test.dot -o test.pdf
#
# With no arguments, graph-depends will draw a complete graph of
# dependencies for the current configuration. With an argument,
# graph-depends will draw a graph of dependencies for the given
# package name.
#
# Limitations
#
# * Some packages have dependencies that depend on the Buildroot
# configuration. For example, many packages have a dependency on
# openssl if openssl has been enabled. This tool will graph the
# dependencies as they are with the current Buildroot
# configuration.
#
# Copyright (C) 2010 Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
import sys
import subprocess
# In FULL_MODE, we draw the full dependency graph for all selected
# packages
FULL_MODE = 1
# In PKG_MODE, we only draw the dependency graph for a given package
PKG_MODE = 2
mode = 0
if len(sys.argv) == 1:
mode = FULL_MODE
elif len(sys.argv) == 2:
mode = PKG_MODE
rootpkg = sys.argv[1]
else:
print "Usage: graph-depends [package-name]"
sys.exit(1)
allpkgs = []
unknownpkgs = []
# Execute the "make show-targets" command to get the list of the main
# Buildroot TARGETS and return it formatted as a Python list. This
# list is used as the starting point for full dependency graphs
def get_targets():
sys.stderr.write("Getting targets\n")
cmd = ["make", "-s", "show-targets"]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output = p.communicate()[0].strip()
if p.returncode != 0:
return None
if output == '':
return []
return output.split(' ')
# Execute the "make <pkg>-show-depends" command to get the list of
# dependencies of a given list of packages, and return the list of
# dependencies formatted as a Python dictionary.
def get_depends(pkgs):
sys.stderr.write("Getting dependencies for %s\n" % pkgs)
cmd = ["make", "-s" ]
for pkg in pkgs:
cmd.append("%s-show-depends" % pkg)
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output = p.communicate()[0]
if p.returncode != 0:
sys.stderr.write("Error getting dependencies %s\n" % pkgs)
sys.exit(1)
output = output.split("\n")
if len(output) != len(pkgs) + 1:
sys.stderr.write("Error getting dependencies\n")
sys.exit(1)
deps = {}
for i in range(0, len(pkgs)):
pkg = pkgs[i]
pkg_deps = output[i].split(" ")
if pkg_deps == ['']:
deps[pkg] = []
else:
deps[pkg] = pkg_deps
return deps
# Recursive function that builds the tree of dependencies for a given
# list of packages. The dependencies are built in a list called
# 'dependencies', which contains tuples of the form (pkg1 ->
# pkg2_on_which_pkg1_depends, pkg3 -> pkg4_on_which_pkg3_depends) and
# the function finally returns this list.
def get_all_depends(pkgs):
dependencies = []
# Filter the packages for which we already have the dependencies
filtered_pkgs = []
for pkg in pkgs:
if pkg in allpkgs:
continue
filtered_pkgs.append(pkg)
allpkgs.append(pkg)
if len(filtered_pkgs) == 0:
return []
depends = get_depends(filtered_pkgs)
deps = set()
for pkg in filtered_pkgs:
pkg_deps = depends[pkg]
# We couldn't get the dependencies of this package, because it
# doesn't use the generic or autotools infrastructure. Add it to
# unknownpkgs so that it is later rendered in red color to warn
# the user.
if pkg_deps == None:
unknownpkgs.append(pkg)
continue
# This package has no dependency.
if pkg_deps == []:
continue
# Add dependencies to the list of dependencies
for dep in pkg_deps:
dependencies.append((pkg, dep))
deps.add(dep)
if len(deps) != 0:
newdeps = get_all_depends(deps)
if newdeps != None:
dependencies += newdeps
return dependencies
# The Graphviz "dot" utility doesn't like dashes in node names. So for
# node names, we strip all dashes.
def pkg_node_name(pkg):
return pkg.replace("-","")
# Helper function for remove_redundant_deps(). This function tells
# whether package "pkg" is the dependency of another package that is
# not the special "all" package.
def has_redundant_deps(deps, pkg):
for dep in deps:
if dep[0] != "all" and dep[1] == pkg:
return True
return False
# This function removes redundant dependencies of the special "all"
# package. This "all" package is created to reflect the origin of the
# selection for all packages that are not themselves selected by any
# other package. So for example if you enable libpng, zlib is enabled
# as a dependency. But zlib being selected by libpng, it also appears
# as a dependency of the "all" package. This needlessly complicates
# the generated dependency graph. So when we have the dependency list
# (all -> zlib, all -> libpn, libpng -> zlib), we get rid of the 'all
# -> zlib' dependency, because zlib is already a dependency of a
# regular package.
def remove_redundant_deps(deps):
newdeps = []
for dep in deps:
if dep[0] != "all":
newdeps.append(dep)
continue
if not has_redundant_deps(deps, dep[1]):
newdeps.append(dep)
continue
sys.stderr.write("Removing redundant dep all -> %s\n" % dep[1])
return newdeps
TARGET_EXCEPTIONS = [
"target-generic-issue",
"target-generic-getty-busybox",
"target-generic-do-remount-rw",
"target-finalize",
"erase-fakeroots",
"target-generic-hostname",
]
# In full mode, start with the result of get_targets() to get the main
# targets and then use get_all_depends() for all targets
if mode == FULL_MODE:
targets = get_targets()
dependencies = []
allpkgs.append('all')
filtered_targets = []
for tg in targets:
# Skip uninteresting targets
if tg in TARGET_EXCEPTIONS:
continue
dependencies.append(('all', tg))
filtered_targets.append(tg)
deps = get_all_depends(filtered_targets)
if deps != None:
dependencies += deps
# In pkg mode, start directly with get_all_depends() on the requested
# package
elif mode == PKG_MODE:
dependencies = get_all_depends([rootpkg])
dependencies = remove_redundant_deps(dependencies)
# Start printing the graph data
print "digraph G {"
# First, the dependencies. Usage of set allows to remove duplicated
# dependencies in the graph
for dep in set(dependencies):
print "%s -> %s" % (pkg_node_name(dep[0]), pkg_node_name(dep[1]))
# Then, the node attributes: color, style and label.
for pkg in allpkgs:
if pkg == 'all':
print "all [label = \"ALL\"]"
print "all [color=lightblue,style=filled]"
continue
print "%s [label = \"%s\"]" % (pkg_node_name(pkg), pkg)
if pkg in unknownpkgs:
print "%s [color=red,style=filled]" % pkg_node_name(pkg)
elif mode == PKG_MODE and pkg == rootpkg:
print "%s [color=lightblue,style=filled]" % pkg_node_name(rootpkg)
else:
print "%s [color=grey,style=filled]" % pkg_node_name(pkg)
print "}"
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