Add Filesystem TS -- Complete

Add the completed std::experimental::filesystem implementation and tests.
The implementation supports C++11 or newer.

The TS is built as part of 'libc++experimental.a'. Users of the TS need to
manually link this library. Building and testing the TS can be disabled using
the CMake option '-DLIBCXX_ENABLE_FILESYSTEM=OFF'.

Currently 'libc++experimental.a' is not installed by default. To turn on the
installation of the library use '-DLIBCXX_INSTALL_EXPERIMENTAL_LIBRARY=ON'.

llvm-svn: 273034

1 files changed, 85 insertions, 0 deletions

diff --git a/libcxx/test/support/filesystem_dynamic_test_helper.py b/libcxx/test/support/filesystem_dynamic_test_helper.py
new file mode 100644
index 00000000000..1f48c952798
--- /dev/null
+++ b/libcxx/test/support/filesystem_dynamic_test_helper.py
@@ -0,0 +1,85 @@
+import sys
+import os
+import stat
+
+# Ensure that this is being run on a specific platform
+assert sys.platform.startswith('linux') or sys.platform.startswith('darwin') \
+    or sys.platform.startswith('cygwin') or sys.platform.startswith('freebsd')
+
+def env_path():
+    ep = os.environ.get('LIBCXX_FILESYSTEM_DYNAMIC_TEST_ROOT')
+    assert ep is not None
+    ep = os.path.realpath(ep)
+    assert os.path.isdir(ep)
+    return ep
+
+env_path_global = env_path()
+
+# Make sure we don't try and write outside of env_path.
+# All paths used should be sanitized
+def sanitize(p):
+    p = os.path.realpath(p)
+    if os.path.commonprefix([env_path_global, p]):
+        return p
+    assert False
+
+"""
+Some of the tests restrict permissions to induce failures.
+Before we delete the test enviroment, we have to walk it and re-raise the
+permissions.
+"""
+def clean_recursive(root_p):
+    if not os.path.islink(root_p):
+        os.chmod(root_p, 0o777)
+    for ent in os.listdir(root_p):
+        p = os.path.join(root_p, ent)
+        if os.path.islink(p) or not os.path.isdir(p):
+            os.remove(p)
+        else:
+            assert os.path.isdir(p)
+            clean_recursive(p)
+            os.rmdir(p)
+
+
+def init_test_directory(root_p):
+    root_p = sanitize(root_p)
+    assert not os.path.exists(root_p)
+    os.makedirs(root_p)
+
+
+def destroy_test_directory(root_p):
+    root_p = sanitize(root_p)
+    clean_recursive(root_p)
+    os.rmdir(root_p)
+
+
+def create_file(fname, size):
+    with open(sanitize(fname), 'w') as f:
+        f.write('c' * size)
+
+
+def create_dir(dname):
+    os.mkdir(sanitize(dname))
+
+
+def create_symlink(source, link):
+    os.symlink(sanitize(source), sanitize(link))
+
+
+def create_hardlink(source, link):
+    os.link(sanitize(source), sanitize(link))
+
+
+def create_fifo(source):
+    os.mkfifo(sanitize(source))
+
+
+def create_socket(source):
+    mode = 0600|stat.S_IFSOCK
+    os.mknod(sanitize(source), mode)
+
+
+if __name__ == '__main__':
+    command = " ".join(sys.argv[1:])
+    eval(command)
+    sys.exit(0)