Backport build_tree.py from development
Copy of scripts/mbedtls_dev/build_tree.py from mbedtls-3.2.1,
backported to facilitate future backports of python scripts.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/scripts/mbedtls_dev/build_tree.py b/scripts/mbedtls_dev/build_tree.py
new file mode 100644
index 0000000..3920d0e
--- /dev/null
+++ b/scripts/mbedtls_dev/build_tree.py
@@ -0,0 +1,60 @@
+"""Mbed TLS build tree information and manipulation.
+"""
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import inspect
+
+
+def looks_like_mbedtls_root(path: str) -> bool:
+ """Whether the given directory looks like the root of the Mbed TLS source tree."""
+ return all(os.path.isdir(os.path.join(path, subdir))
+ for subdir in ['include', 'library', 'programs', 'tests'])
+
+
+def chdir_to_root() -> None:
+ """Detect the root of the Mbed TLS source tree and change to it.
+
+ The current directory must be up to two levels deep inside an Mbed TLS
+ source tree.
+ """
+ for d in [os.path.curdir,
+ os.path.pardir,
+ os.path.join(os.path.pardir, os.path.pardir)]:
+ if looks_like_mbedtls_root(d):
+ os.chdir(d)
+ return
+ raise Exception('Mbed TLS source tree not found')
+
+
+def guess_mbedtls_root():
+ """Guess mbedTLS source code directory.
+
+ Return the first possible mbedTLS root directory
+ """
+ dirs = set({})
+ for frame in inspect.stack():
+ path = os.path.dirname(frame.filename)
+ for d in ['.', os.path.pardir] \
+ + [os.path.join(*([os.path.pardir]*i)) for i in range(2, 10)]:
+ d = os.path.abspath(os.path.join(path, d))
+ if d in dirs:
+ continue
+ dirs.add(d)
+ if looks_like_mbedtls_root(d):
+ return d
+ raise Exception('Mbed TLS source tree not found')