[lldb] Use Python script to generate SBLanguages.h (#90753)

Use a Python script to generate SBLanguages.h instead of piggybacking on
LLDB TableGen. This addresses Nico Weber's post-commit feedback.

1 files changed, 67 insertions, 0 deletions

diff --git a/lldb/scripts/generate-sbapi-dwarf-enum.py b/lldb/scripts/generate-sbapi-dwarf-enum.py
new file mode 100755
index 000000000000..5eeb8264a768
--- /dev/null
+++ b/lldb/scripts/generate-sbapi-dwarf-enum.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+
+import argparse
+import re
+
+HEADER = """\
+//===-- SBLanguages.h -----------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_API_SBLANGUAGE_H
+#define LLDB_API_SBLANGUAGE_H
+/// Used by \\ref SBExpressionOptions.
+/// These enumerations use the same language enumerations as the DWARF
+/// specification for ease of use and consistency.
+enum SBSourceLanguageName : uint16_t {
+"""
+
+FOOTER = """\
+};
+
+#endif
+"""
+
+REGEX = re.compile(
+    r'^ *HANDLE_DW_LNAME *\( *(?P<value>[^,]+), (?P<comment>[^"]+), "(?P<name>.*)",.*\)'
+)
+
+
+def emit_enum(input, output):
+    # Read the input and break it up by lines.
+    lines = []
+    with open(input, "r") as f:
+        lines = f.readlines()
+
+    # Write the output.
+    with open(output, "w") as f:
+        # Emit the header.
+        f.write(HEADER)
+
+        # Emit the enum values.
+        for line in lines:
+            match = REGEX.match(line)
+            if not match:
+                continue
+            f.write(f"  /// {match.group('comment')}.\n")
+            f.write(f"  eLanguageName{match.group('name')} = {match.group('value')},\n")
+
+        # Emit the footer
+        f.write(FOOTER)
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--output", "-o")
+    parser.add_argument("input")
+    args = parser.parse_args()
+
+    emit_enum(args.input, args.output)
+
+
+if __name__ == "__main__":
+    main()