BUILD: Add delayed_configure_files.cmake

1 files changed, 79 insertions, 0 deletions

diff --git a/scripts/generate_configure_cmake_script.py b/scripts/generate_configure_cmake_script.py
new file mode 100755
index 000000000..93f6382bb
--- /dev/null
+++ b/scripts/generate_configure_cmake_script.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+#
+# Copyright 2022 The Mumble Developers. All rights reserved.
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file at the root of the
+# Mumble source tree or at <https://www.mumble.info/LICENSE>.
+
+from typing import Tuple
+from typing import List
+from typing import Dict
+
+import argparse
+import sys
+
+
+def parse_key_value_pair(pair: str) -> Tuple[str, str]:
+    assert "=" in pair
+
+    idx = pair.find("=")
+
+    key = pair[: idx].strip()
+    value = pair[idx + 1:].strip()
+
+    if value[0] == value[-1] and value[0] in ["\"", "'"]:
+        # Value is enclosed in quotes -> Remove those
+        value = value[1: -1]
+
+    return (key, value)
+
+
+def parse_key_value_pairs(pairs: List[str]) -> Dict[str, str]:
+    key_value_pairs = {}
+
+    for currentPair in pairs:
+        key, value = parse_key_value_pair(currentPair)
+
+        key_value_pairs[key] = value
+
+    return key_value_pairs
+
+
+def main():
+    parser = argparse.ArgumentParser(description="This script generates a cmake script whose sole purpose is to invoke configure_file" +
+                                     " on a given set of files.")
+    parser.add_argument(
+        "--variables", help="Specify a number of variables and their content as key-value-pairs", metavar="NAME=VALUE", nargs="+")
+    parser.add_argument("--files", help="Specify the to-be-configured files and their output path as key-value-pairs", metavar="IN-FILE=OUT-FILE",
+                        nargs="+", required=True)
+    parser.add_argument("--output", help="The path to the file to which to write the generated content. If not given, the content is" +
+                        " written to stdout")
+    parser.add_argument("--at-only", help="Passes the @ONLY option to configure_file", action="store_true", default=False)
+
+    args = parser.parse_args()
+
+    variables = parse_key_value_pairs(args.variables) if args.variables else {}
+    files = parse_key_value_pairs(args.files) if args.files else {}
+
+    cmake_content = "# Defining variables\n"
+    for currentVar in variables.keys():
+        if " " in currentVar:
+            print("[ERROR]: Variable name with whitespace \"%s\"" % currentVar)
+            sys.exit(1)
+
+        cmake_content += "set(%s \"%s\")\n" % (currentVar, variables[currentVar])
+
+    cmake_content += "\n"
+    cmake_content += "# Configuring files\n"
+    for currentInFile in files.keys():
+        cmake_content += "configure_file(\"%s\" \"%s\" %s)\n" % (currentInFile, files[currentInFile], "@ONLY" if args.at_only else "")
+
+    if args.output:
+        with open(args.output, "w") as outFile:
+            outFile.write(cmake_content)
+    else:
+        print(cmake_content)
+
+
+if __name__ == "__main__":
+    main()