Merge from bittboy/buildroot@db180c0

support/scripts/brpkgutil.py

@@ -0,0 +1,50 @@
+# Copyright (C) 2010-2013 Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+# Copyright (C) 2019 Yann E. MORIN <yann.morin.1998@free.fr>
+
+import json
+import logging
+import os
+import subprocess
+from collections import defaultdict
+
+
+# This function returns a tuple of four dictionaries, all using package
+# names as keys:
+# - a dictionary which values are the lists of packages that are the
+#   dependencies of the package used as key;
+# - a dictionary which values are the lists of packages that are the
+#   reverse dependencies of the package used as key;
+# - a dictionary which values are the type of the package used as key;
+# - a dictionary which values are the version of the package used as key,
+#   'virtual' for a virtual package, or the empty string for a rootfs.
+def get_dependency_tree():
+    logging.info("Getting dependency tree...")
+
+    deps = {}
+    rdeps = defaultdict(list)
+    types = {}
+    versions = {}
+
+    # Special case for the 'all' top-level fake package
+    deps['all'] = []
+    types['all'] = 'target'
+    versions['all'] = ''
+
+    cmd = ["make", "-s", "--no-print-directory", "show-info"]
+    with open(os.devnull, 'wb') as devnull:
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=devnull,
+                             universal_newlines=True)
+        pkg_list = json.loads(p.communicate()[0])
+
+    for pkg in pkg_list:
+        deps['all'].append(pkg)
+        types[pkg] = pkg_list[pkg]["type"]
+        deps[pkg] = pkg_list[pkg].get("dependencies", [])
+        for p in deps[pkg]:
+            rdeps[p].append(pkg)
+        versions[pkg] = \
+            None if pkg_list[pkg]["type"] == "rootfs" \
+            else "virtual" if pkg_list[pkg]["virtual"] \
+            else pkg_list[pkg]["version"]
+
+    return (deps, rdeps, types, versions)