graph-depends.py: support python3

This patch is the result of 2to3.

In addition, universal_newlines=True is added to the Popen calls. In
python3, this makes sure that the output is decoded so that we get a
string instead of a buffer object.

Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/scripts/graph-depends

@@ -82,7 +82,7 @@ allpkgs = []
 def get_targets():
     sys.stderr.write("Getting targets\n")
     cmd = ["make", "-s", "show-targets"]
-    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
     output = p.communicate()[0].strip()
     if p.returncode != 0:
         return None
@@ -98,7 +98,7 @@ def get_depends(pkgs):
     cmd = ["make", "-s" ]
     for pkg in pkgs:
         cmd.append("%s-show-depends" % pkg)
-    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
     output = p.communicate()[0]
     if p.returncode != 0:
         sys.stderr.write("Error getting dependencies %s\n" % pkgs)
@@ -203,7 +203,7 @@ elif mode == MODE_PKG:
 # Make the dependencies a dictionnary { 'pkg':[dep1, dep2, ...] }
 dict_deps = {}
 for dep in dependencies:
-    if not dict_deps.has_key(dep[0]):
+    if dep[0] not in dict_deps:
         dict_deps[dep[0]] = []
     dict_deps[dep[0]].append(dep[1])
 
@@ -211,7 +211,7 @@ for dep in dependencies:
 # transitive) of pkg2, dependencies being listed in the deps
 # dictionary. Returns False otherwise.
 def is_dep(pkg,pkg2,deps):
-    if deps.has_key(pkg2):
+    if pkg2 in deps:
         for p in deps[pkg2]:
             if pkg == p:
                 return True
@@ -248,10 +248,10 @@ def remove_toolchain_deps(pkg,deps):
 # This functions trims down the dependency list of all packages.
 # It applies in sequence all the dependency-elimination methods.
 def remove_extra_deps(deps):
-    for pkg in deps.keys():
+    for pkg in list(deps.keys()):
         if not pkg == 'all':
             deps[pkg] = remove_toolchain_deps(pkg,deps)
-    for pkg in deps.keys():
+    for pkg in list(deps.keys()):
         if not transitive or pkg == 'all':
             deps[pkg] = remove_transitive_deps(pkg,deps)
     return deps
@@ -274,8 +274,8 @@ def print_attrs(pkg):
             color = host_colour
         else:
             color = target_colour
-    print "%s [label = \"%s\"]" % (name, label)
-    print "%s [color=%s,style=filled]" % (name, color)
+    print("%s [label = \"%s\"]" % (name, label))
+    print("%s [color=%s,style=filled]" % (name, color))
 
 # Print the dependency graph of a package
 def print_pkg_deps(depth, pkg):
@@ -283,17 +283,17 @@ def print_pkg_deps(depth, pkg):
         return
     done_deps.append(pkg)
     print_attrs(pkg)
-    if not dict_deps.has_key(pkg):
+    if pkg not in dict_deps:
         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("%s -> %s" % (pkg_node_name(pkg), pkg_node_name(d)))
             print_pkg_deps(depth+1, d)
 
 # Start printing the graph data
-print "digraph G {"
+print("digraph G {")
 
 done_deps = []
 print_pkg_deps(0, rootpkg)
 
-print "}"
+print("}")