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support/graph-depends: add option to limit the depth of the graph

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Currently, the complete dependency chain of a package is used to
generate the dependency graph. When this dependency chain is long,
the generated graph becomes almost unreadable.

However, it is often sufficient to get the first few levels of
dependency of a package.

Add a new variable BR2_GRAPH_DEPTH, that the user can set to limit
the depth of the dependency list.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Yann E. MORIN 2014-04-13 22:42:39 +02:00 committed by Thomas Petazzoni
parent 3d37950ec1
commit 12c5e68ea8
3 changed files with 40 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Makefile
View File

@ -150,6 +150,7 @@ endif
# Need that early, before we scan packages
# Avoids doing the $(or...) everytime
BR_GRAPH_OUT := $(or $(BR2_GRAPH_OUT),pdf)
BR_GRAPH_DEPTH := $(or $(BR2_GRAPH_DEPTH),0)
BUILD_DIR:=$(BASE_DIR)/build
BINARIES_DIR:=$(BASE_DIR)/images
@ -672,7 +673,7 @@ graph-build: $(O)/build/build-time.log
graph-depends:
@$(INSTALL) -d $(O)/graphs
@cd "$(CONFIG_DIR)"; \
$(TOPDIR)/support/scripts/graph-depends \
$(TOPDIR)/support/scripts/graph-depends -d $(BR_GRAPH_DEPTH) \
|dot -T$(BR_GRAPH_OUT) -o $(O)/graphs/$(@).$(BR_GRAPH_OUT)
else # ifeq ($(BR2_HAVE_DOT_CONFIG),y)

2
package/pkg-generic.mk
View File

@ -495,7 +495,7 @@ $(1)-show-depends:
$(1)-graph-depends:
@$(INSTALL) -d $(O)/graphs
@cd "$(CONFIG_DIR)"; \
$(TOPDIR)/support/scripts/graph-depends -p $(1) \
$(TOPDIR)/support/scripts/graph-depends -p $(1) -d $(BR_GRAPH_DEPTH) \
|dot -T$(BR_GRAPH_OUT) -o $(O)/graphs/$$(@).$(BR_GRAPH_OUT)
$(1)-dirclean: $$($(2)_TARGET_DIRCLEAN)

49
support/scripts/graph-depends
View File

@ -8,6 +8,8 @@
# dependencies for the current configuration.
# If '-p <package-name>' is specified, graph-depends will draw a graph
# of dependencies for the given package name.
# If '-d <depth>' is specified, graph-depends will limit the depth of
# the dependency graph to 'depth' levels.
#
# Limitations
#
@ -31,10 +33,13 @@ FULL_MODE = 1
PKG_MODE = 2
mode = 0
max_depth = 0
parser = argparse.ArgumentParser(description="Graph pacakges dependencies")
parser.add_argument("--package", '-p', metavar="PACKAGE",
help="Graph the dependencies of PACKAGE")
parser.add_argument("--depth", '-d', metavar="DEPTH",
help="Limit the dependency graph to DEPTH levels")
args = parser.parse_args()
if args.package == None:
@ -43,6 +48,9 @@ else:
mode = PKG_MODE
rootpkg = args.package
if args.depth != None:
max_depth = int(args.depth)
allpkgs = []
# Execute the "make show-targets" command to get the list of the main
@ -193,6 +201,7 @@ if mode == FULL_MODE:
deps = get_all_depends(filtered_targets)
if deps != None:
dependencies += deps
rootpkg = 'all'
# In pkg mode, start directly with get_all_depends() on the requested
# package
@ -201,26 +210,42 @@ elif mode == PKG_MODE:
dependencies = remove_redundant_deps(dependencies)
# Start printing the graph data
print "digraph G {"
# Make the dependencies a dictionnary { 'pkg':[dep1, dep2, ...] }
dict_deps = {}
for dep in dependencies:
if not dict_deps.has_key(dep[0]):
dict_deps[dep[0]] = []
dict_deps[dep[0]].append(dep[1])
# 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:
# Print the attributes of a node: label and fill-color
def print_attrs(pkg):
if pkg == 'all':
print "all [label = \"ALL\"]"
print "all [color=lightblue,style=filled]"
continue
return
print "%s [label = \"%s\"]" % (pkg_node_name(pkg), pkg)
if 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 the dependency graph of a package
def print_pkg_deps(depth, pkg):
if pkg in done_deps:
return
done_deps.append(pkg)
print_attrs(pkg)
if not dict_deps.has_key(pkg):
return
if max_depth == 0 or depth < max_depth:
for d in dict_deps[pkg]:
print "%s -> %s" % (pkg_node_name(pkg), pkg_node_name(d))
print_pkg_deps(depth+1, d)
# Start printing the graph data
print "digraph G {"
done_deps = []
print_pkg_deps(0, rootpkg)
print "}"