Helper script to install symlink in meson

contrib/meson/InstallSymlink.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+# #############################################################################
+# Copyright (c) 2018-present    lzutao <taolzu(at)gmail.com>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# #############################################################################
+import errno
+import os
+
+
+def mkdir_p(path, dir_mode=0o777):
+  try:
+    os.makedirs(path, mode=dir_mode)
+  except OSError as exc:  # Python >2.5
+    if exc.errno == errno.EEXIST and os.path.isdir(path):
+      pass
+    else:
+      raise
+
+
+def InstallSymlink(src, dst, install_dir, dst_is_dir=False, dir_mode=0o777):
+  if not os.path.exists(install_dir):
+      mkdir_p(install_dir, dir_mode)
+  if not os.path.isdir(install_dir):
+      raise NotADirectoryError(install_dir)
+
+  new_dst = os.path.join(install_dir, dst)
+  if os.path.islink(new_dst) and os.readlink(new_dst) == src:
+    print('File exists: %r -> %r' % (dst, src))
+    return
+  print('Installing symlink %r -> %r' % (new_dst, src))
+  os.symlink(src, new_dst, dst_is_dir)
+
+
+def main():
+  import argparse
+  parser = argparse.ArgumentParser(description='Install a symlink.\n',
+      usage='usage: InstallSymlink.py [-h] [-d] [-m MODE] src dst '
+            'install_dir\n\n'
+            'example:\n'
+            '\tInstallSymlink.py libcrypto.so.1.0.0 libcrypt.so '
+            '/usr/lib/x86_64-linux-gnu False')
+  parser.add_argument('src', help='target to link')
+  parser.add_argument('dst', help='link name')
+  parser.add_argument('install_dir', help='installation directory')
+  parser.add_argument('-d', '--isdir',
+      action='store_true',
+      help='dst is a directory')
+  parser.add_argument('-m', '--mode',
+      help='directory mode on creating if not exist',
+      default='0o777')
+  args = parser.parse_args()
+
+  src = args.src
+  dst = args.dst
+  install_dir = args.install_dir
+  dst_is_dir = args.isdir
+  dir_mode = int(args.mode, 8)
+
+  DESTDIR = os.environ.get('DESTDIR')
+  if DESTDIR:
+      install_dir = DESTDIR + install_dir if os.path.isabs(install_dir) \
+               else os.path.join(DESTDIR, install_dir)
+
+  InstallSymlink(src, dst, install_dir, dst_is_dir, dir_mode)
+
+
+if __name__ == '__main__':
+  main()