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Unified Diff: tools/BUILD_simulator.py

Issue 1290833003: Add a simple script to simulate BUILD file glob() expansion. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: spelling Created 5 years, 4 months ago
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Index: tools/BUILD_simulator.py
diff --git a/tools/BUILD_simulator.py b/tools/BUILD_simulator.py
new file mode 100644
index 0000000000000000000000000000000000000000..65e6b7d11ed769ce5369baffb3dfee644a7390ba
--- /dev/null
+++ b/tools/BUILD_simulator.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+#
+# Copyright 2015 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This script does a very rough simulation of BUILD file expansion,
+# mostly to see the effects of glob().
+
+# We start by adding some symbols to our namespace that BUILD.public calls.
+
+# We don't really care about this, so just no-op it.
+def exports_files(files):
+ pass
+
+# Simulates BUILD file glob().
+def glob(include, exclude=()):
+ from glob import glob as python_glob
+
+ files = set()
+ for pattern in include:
+ files.update(python_glob(pattern))
+ for pattern in exclude:
+ files.difference_update(python_glob(pattern))
+ return list(sorted(files))
+
+# We've put enough into our environment now to treat BUILD.public as if it were
+# Python code. This pulls its variable definitions (SRCS, HDRS, DEFINES, etc.)
+# into our local namespace.
+execfile('BUILD.public')
+
+# Pretty-print every variable whose name is COMPLETELY_UPPERCASE,
+# i.e. every variable from BUILD.public. This is obviously quite heuristic.
+from pprint import pprint
+with open('tools/BUILD.public.expected', 'w') as out:
+ print >>out, "This file is auto-generated by tools/BUILD_simulator.py."
+ print >>out, "It expands BUILD.public to make it easy to see changes."
+ for name, value in sorted(locals().items()):
+ if name.isupper():
+ print >>out, name, '= ',
+ pprint(value, out)
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