Move shell and python scripts to scripts/ directory

Change-Id: Icdff44a54d14ddfc2266d99cf0578a8105716918

scripts/copygcclib.sh

@@ -0,0 +1,7 @@
+#!/bin/bash -e
+
+OUT=$1
+shift
+LIBPATH=$($@)
+cp -f $LIBPATH $OUT
+echo "$OUT: $LIBPATH" > ${OUT}.d

scripts/reverse_path.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+from __future__ import print_function
+
+import os
+import sys
+
+# Find the best reverse path to reference the current directory from another
+# directory. We use this to find relative paths to and from the source and build
+# directories.
+#
+# If the directory is given as an absolute path, return an absolute path to the
+# current directory.
+#
+# If there's a symlink involved, and the same relative path would not work if
+# the symlink was replace with a regular directory, then return an absolute
+# path. This handles paths like out -> /mnt/ssd/out
+#
+# For symlinks that can use the same relative path (out -> out.1), just return
+# the relative path. That way out.1 can be renamed as long as the symlink is
+# updated.
+#
+# For everything else, just return the relative path. That allows the source and
+# output directories to be moved as long as they stay in the same position
+# relative to each other.
+def reverse_path(path):
+    if path.startswith("/"):
+        return os.path.abspath('.')
+
+    realpath = os.path.relpath(os.path.realpath('.'), os.path.realpath(path))
+    relpath = os.path.relpath('.', path)
+
+    if realpath != relpath:
+        return os.path.abspath('.')
+
+    return relpath
+
+
+if __name__ == '__main__':
+    print(reverse_path(sys.argv[1]))

scripts/reverse_path_test.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+
+from __future__ import print_function
+
+import os
+import shutil
+import tempfile
+import unittest
+
+from reverse_path import reverse_path
+
+class TestReversePath(unittest.TestCase):
+    def setUp(self):
+        self.tmpdir = tempfile.mkdtemp()
+        os.chdir(self.tmpdir)
+
+    def tearDown(self):
+        shutil.rmtree(self.tmpdir)
+
+    def test_absolute(self):
+        self.assertEqual(self.tmpdir, reverse_path('/out'))
+
+    def test_relative(self):
+        os.mkdir('a')
+        os.mkdir('b')
+
+        self.assertEqual('..', reverse_path('a'))
+
+        os.chdir('a')
+        self.assertEqual('a', reverse_path('..'))
+        self.assertEqual('.', reverse_path('../a'))
+        self.assertEqual('../a', reverse_path('../b'))
+
+    def test_symlink(self):
+        os.mkdir('b')
+        os.symlink('b', 'a')
+        os.mkdir('b/d')
+        os.symlink('b/d', 'c')
+
+        self.assertEqual('..', reverse_path('a'))
+        self.assertEqual('..', reverse_path('b'))
+        self.assertEqual(self.tmpdir, reverse_path('c'))
+        self.assertEqual('../..', reverse_path('b/d'))
+
+
+if __name__ == '__main__':
+    unittest.main()