Add Python script which finds Windows dependencies

Signed-off-by: Stefan Weil <sw@weilnetz.de>

nsis/build.sh

@@ -107,8 +107,11 @@ export PKG_CONFIG_PATH
 make all training
 MINGW_INSTALL=${PWD}${MINGW}
 make install-jars install training-install html prefix="$MINGW_INSTALL"
+test -d venv || python3 -m venv venv
+source venv/bin/activate
+pip install pefile
 mkdir -p dll
-ln -sv $($ROOTDIR/nsis/find_deps.py $MINGW_INSTALL/bin/*.exe $MINGW_INSTALL/bin/*.dll | sort | uniq) dll/
+ln -sv $("$ROOTDIR/nsis/find_deps.py" "$MINGW_INSTALL"/bin/*.exe "$MINGW_INSTALL"/bin/*.dll) dll/
 make winsetup prefix="$MINGW_INSTALL"
 
 # Copy result for upload.

nsis/find_deps.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2024 Stefan Weil
+#
+# SPDX-License-Identifier: MIT
+#
+# Find the DLL files which are required for a given set of
+# Windows executables and libraries.
+
+import argparse
+import os
+import pefile
+
+VERBOSE = False
+
+def find_dependencies(binary, search_path, analyzed_deps):
+    pe = pefile.PE(binary)
+    pe.parse_data_directories()
+    if VERBOSE:
+        print(f'{binary}:')
+    # print(pe.dump_info())
+
+    for entry in pe.DIRECTORY_ENTRY_IMPORT:
+        name = entry.dll.decode('utf-8')
+        if name in analyzed_deps:
+            if VERBOSE:
+                print(f'skip {name} (already analyzed)')
+            continue
+        analyzed_deps.add(name)
+        fullpath = os.path.join(search_path, name)
+        if not os.path.exists(fullpath):
+            # Not found, maybe system DLL. Skip it.
+            if VERBOSE:
+                print(f'skip {name} (not found, maybe system DLL)')
+            continue
+        print(fullpath)
+        analyzed_deps = find_dependencies(fullpath, search_path, analyzed_deps)
+
+    return analyzed_deps
+
+def main():
+    """
+    Command-line interface for universal dependency scanner.
+    """
+
+    parser = argparse.ArgumentParser(description='Find and copy DLL dependencies')
+    parser.add_argument('files', nargs='+', help='Paths to executable or library files')
+    parser.add_argument('--dlldir', dest='dlldir', default='/mingw64/bin/',
+                        help='path to dll files')
+
+    args = parser.parse_args()
+
+    # try:
+    # Find dependencies
+    analyzed_deps = set()
+    for binary in args.files:
+        if True:
+            analyzed_deps = find_dependencies(binary, args.dlldir, analyzed_deps)
+        # except:
+        #    print(f'error: failed to find dependencies for {binary}')
+
+
+if __name__ == '__main__':
+    main()