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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2010-05-06 08:09:14 (GMT)
committer Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2010-05-21 13:16:48 (GMT)
commit0e12aa3e0f9a3a1170196c1f078f633fcbc92568 (patch)
tree5d4cb0275530d9e228d622381bb635b0b40d87fe
parentb7d6c8ad0f786552e21d91d97ad4221ebc43876f (diff)
downloadbuildroot-0e12aa3e0f9a3a1170196c1f078f633fcbc92568.tar.gz
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New graph-depends script
Add a Python script that draws dependency graphs, either for the full set of selected packages, or for a particular given package. Of course, it is limited to packages that use either the generic or autotools infrastructures. The script generates a file that Graphviz can parse and generate a PDF (or other formats) from it. Full dependency graph of all selected packages : ./scripts/graph-depends > test.dot dot -Tpdf test.dot -o test.pdf Dependency graph of libgtk2 : ./scripts/graph-depends libgtk2 > test.dot dot -Tpdf test.dot -o test.pdf Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-rwxr-xr-xscripts/graph-depends169
1 files changed, 169 insertions, 0 deletions
diff --git a/scripts/graph-depends b/scripts/graph-depends
new file mode 100755
index 0000000..4d82282
--- /dev/null
+++ b/scripts/graph-depends
@@ -0,0 +1,169 @@
+#!/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.
+#
+# * The X.org package definitions are only included when
+# BR2_PACKAGE_XORG7 is enabled, so if this option is not enabled,
+# it isn't possible to graph the dependencies of X.org stack
+# components.
+#
+# 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", "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 package, and return the list of dependencies
+# formatted as a Python list.
+def get_depends(pkg):
+ sys.stderr.write("Getting dependencies for %s\n" % pkg)
+ cmd = ["make", "%s-show-depends" % pkg]
+ 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(' ')
+
+# Recursive function that builds the tree of dependencies for a given
+# package. The dependencies are built in a list called 'dependencies',
+# which contains tuples of the form (pkg1 ->
+# pkg2_on_which_pkg1_depends) and the function finally returns this
+# list.
+def get_all_depends(pkg):
+ dependencies = []
+
+ # We already have the dependencies for this package
+ if pkg in allpkgs:
+ return
+ allpkgs.append(pkg)
+ depends = get_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 depends == None:
+ unknownpkgs.append(pkg)
+ return
+
+ # This package has no dependency.
+ if depends == []:
+ return
+
+ # Add dependencies to the list of dependencies
+ for dep in depends:
+ dependencies.append((pkg, dep))
+
+ # Recurse into the dependencies
+ for dep in depends:
+ newdeps = get_all_depends(dep)
+ 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("-","")
+
+# In full mode, start with the result of get_targets() to get the main
+# targets and then use get_all_depends() for each individual target.
+if mode == FULL_MODE:
+ targets = get_targets()
+ dependencies = []
+ allpkgs.append('all')
+ for tg in targets:
+ # Skip uninteresting targets
+ if tg == 'target-generic-issue' or \
+ tg == 'target-finalize' or \
+ tg == 'erase-fakeroots' or \
+ tg == 'target-generic-hostname':
+ continue
+ dependencies.append(('all', tg))
+ deps = get_all_depends(tg)
+ 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)
+
+# 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 "}"