graph-depends: split off get_rdepends from get_depends

The use of a 'rule' variable that can contain 'show-depends' or
'show-rdepends' is not logical if get_depends is considered as a reusable
function from various scripts. The name of these rules are too much an
implementation detail.

Therefore, split the existing get_depends into two separate functions
get_depends and get_rdepends, while keeping code duplication to a minimum.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/scripts/graph-depends

@@ -102,13 +102,13 @@ else:
 transitive = args.transitive
 
 if args.direct:
-    rule = "show-depends"
+    get_depends_func = pkgutil.get_depends
     arrow_dir = "forward"
 else:
     if mode == MODE_FULL:
         sys.stderr.write("--reverse needs a package\n")
         sys.exit(1)
-    rule = "show-rdepends"
+    get_depends_func = pkgutil.get_rdepends
     arrow_dir = "back"
 
 # Get the colours: we need exactly three colours,
@@ -157,7 +157,7 @@ def get_all_depends(pkgs):
     if len(filtered_pkgs) == 0:
         return []
 
-    depends = pkgutil.get_depends(filtered_pkgs, rule)
+    depends = get_depends_func(filtered_pkgs)
 
     deps = set()
     for pkg in filtered_pkgs:

support/scripts/pkgutil.py

@@ -25,10 +25,7 @@ def get_version(pkgs):
         version[pkg] = output[i]
     return version
 
-# 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, rule):
+def _get_depends(pkgs, rule):
     sys.stderr.write("Getting dependencies for %s\n" % pkgs)
     cmd = ["make", "-s", "--no-print-directory" ]
     for pkg in pkgs:
@@ -51,3 +48,15 @@ def get_depends(pkgs, rule):
         else:
             deps[pkg] = pkg_deps
     return deps
+
+# 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):
+    return _get_depends(pkgs, 'show-depends')
+
+# Execute the "make <pkg>-show-rdepends" command to get the list of
+# reverse dependencies of a given list of packages, and return the
+# list of dependencies formatted as a Python dictionary.
+def get_rdepends(pkgs):
+    return _get_depends(pkgs, 'show-rdepends')