Add --dir option to findleaves.py

findleaves.py needs to be able to search multiple directories for
multiple filenames (Android.bp and Android.mk).  Add support for a new
--dir= option to specify one or more directories to search, and then
treat any remaining options as filenames.  If no directories are
specified, fall back to treating only the last option as a filename and
the rest as directories.

Change-Id: Ie879facd49192c6b4fafae070ad00eb21b1faa32

tools/findleaves.py

@@ -23,7 +23,7 @@
 import os
 import sys
 
-def perform_find(mindepth, prune, dirlist, filename):
+def perform_find(mindepth, prune, dirlist, filenames):
   result = []
   pruneleaves = set(map(lambda x: os.path.split(x)[1], prune))
   for rootdir in dirlist:
@@ -48,19 +48,24 @@ def perform_find(mindepth, prune, dirlist, filename):
         if depth < mindepth:
           continue
       # match
-      if filename in files:
-        result.append(os.path.join(root, filename))
-        del dirs[:]
+      for filename in filenames:
+        if filename in files:
+          result.append(os.path.join(root, filename))
+          del dirs[:]
   return result
 
 def usage():
-  sys.stderr.write("""Usage: %(progName)s [<options>] <dirlist> <filename>
+  sys.stderr.write("""Usage: %(progName)s [<options>] [--dir=<dir>] <filenames>
 Options:
    --mindepth=<mindepth>
        Both behave in the same way as their find(1) equivalents.
    --prune=<dirname>
        Avoids returning results from inside any directory called <dirname>
        (e.g., "*/out/*"). May be used multiple times.
+   --dir=<dir>
+       Add a directory to search.  May be repeated multiple times.  For backwards
+       compatibility, if no --dir argument is provided then all but the last entry
+       in <filenames> are treated as directories.
 """ % {
       "progName": os.path.split(sys.argv[0])[1],
     })
@@ -69,6 +74,7 @@ Options:
 def main(argv):
   mindepth = -1
   prune = []
+  dirlist = []
   i=1
   while i<len(argv) and len(argv[i])>2 and argv[i][0:2] == "--":
     arg = argv[i]
@@ -82,14 +88,24 @@ def main(argv):
       if len(p) == 0:
         usage()
       prune.append(p)
+    elif arg.startswith("--dir="):
+      d = arg[len("--dir="):]
+      if len(p) == 0:
+        usage()
+      dirlist.append(d)
     else:
       usage()
     i += 1
-  if len(argv)-i < 2: # need both <dirlist> and <filename>
-    usage()
-  dirlist = argv[i:-1]
-  filename = argv[-1]
-  results = list(set(perform_find(mindepth, prune, dirlist, filename)))
+  if len(dirlist) == 0: # backwards compatibility
+    if len(argv)-i < 2: # need both <dirlist> and <filename>
+      usage()
+    dirlist = argv[i:-1]
+    filenames = [argv[-1]]
+  else:
+    if len(argv)-i < 1: # need <filename>
+      usage()
+    filenames = argv[i:]
+  results = list(set(perform_find(mindepth, prune, dirlist, filenames)))
   results.sort()
   for r in results:
     print r