Windows|Cygwin: Script for deploying Cygwin libraries

doomsday/build/scripts/cygwin_deps.py

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+#!/usr/bin/python
+# This script goes through a Cygwin deployment and copies all the required
+# dependencies from the system directory. All executables (EXE, DLL) are
+# checked.
+
+from __future__ import print_function
+
+import sys, os, shutil, subprocess, re, platform
+if not platform.system().startswith('CYGWIN_'):
+    raise Exception('Please run under cygwin')
+system_bin = '/bin'
+objdump_cmd = '/bin/objdump'
+root = os.path.join(sys.argv[1])
+binaries = set(filter(lambda n: os.path.splitext(n)[1].lower() in ['.exe', '.dll'],
+                      os.listdir(root)))
+while binaries:
+    binary = binaries.pop()
+    if binary.startswith('lib'):
+        # Not a cygwin library.
+        continue
+    print('--', binary)
+    bin_path = os.path.join(root, binary)
+    deps = subprocess.check_output([objdump_cmd, '-p', bin_path]).decode()
+    for deps_line in deps.split('\n'):
+        found = re.search('DLL Name: (.*)', deps_line)
+        if found:
+            dll_name = found.group(1).strip()
+            dll_path = os.path.join(system_bin, dll_name)
+            dest_path = os.path.join(root, dll_name)
+            if os.path.exists(dll_path) and not os.path.exists(dest_path):
+                # Copy this dependency.
+                print(dll_path)
+                shutil.copy(dll_path, dest_path)
+                binaries.add(dest_path)