[PATCH 10/16] rpcgen: define entrypoint for running new rpcgen impl
The new program takes the form
rpcgen [--mode source|header|repr] \
[--header include] \
xdr-file output-file
If '--mode' is not given it parses the XDR file but does not
generate anything, which is useful as a syntax check. The
'source' mode gives the '.c' file content, while 'header'
gives the '.h' file content. 'repr' gives a representation
of the abstract syntax tree, mostly useful for debugging
the parser.
If '--header' is given, it is added as a local #include ".."
statement in the output and is valid for either 'header'
or 'source' modes.
Either 'xdr-file' or 'output-file' can be omitted in which
case they default to stdin/stdout respectively.
This rpcgen program will directly include the 'config.h'
header in its output.
Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com>
---
scripts/rpcgen/main.py | 86 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
create mode 100755 scripts/rpcgen/main.py
diff --git a/scripts/rpcgen/main.py b/scripts/rpcgen/main.py
new file mode 100755
index 0000000000..bf4ef38ede
--- /dev/null
+++ b/scripts/rpcgen/main.py
@@ -0,0 +1,86 @@
+#!/usr/bin/python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+import argparse
+import os
+import sys
+
+from rpcgen.parser import XDRParser
+from rpcgen.generator import (
+ XDRTypeDeclarationGenerator,
+ XDRMarshallDeclarationGenerator,
+ XDRMarshallImplementationGenerator,
+)
+
+
+def parse_cli():
+ parser = argparse.ArgumentParser("RPC code generator")
+ parser.add_argument(
+ "-m",
+ "--mode",
+ choices=["header", "source", "repr"],
+ help="Output generation mode",
+ )
+ parser.add_argument(
+ "-r", "--header", default=[], action="append",
help="Extra headers to include"
+ )
+ parser.add_argument("input", default="-", nargs="?",
help="XDR input protocol file")
+ parser.add_argument("output", default="-", nargs="?",
help="Generated output file")
+
+ return parser.parse_args()
+
+
+def main():
+ args = parse_cli()
+
+ infp = sys.stdin
+ outfp = sys.stdout
+ if args.input != "-":
+ infp = open(args.input, "r")
+ if args.output != "-":
+ # the old genprotocol.pl wrapper would make the
+ # output files mode 0444, which will prevent us
+ # from writing directly do them. Explicitly
+ # unlinking first gets rid of any old possibly
+ # read-only copy
+ #
+ # We can delete this in a few years, once we
+ # know users won't have a previously generated
+ # readonly copy lieing around.
+ try:
+ os.unlink(args.output)
+ except Exception:
+ pass
+ outfp = open(args.output, "w")
+
+ parser = XDRParser(infp)
+ spec = parser.parse()
+
+ if args.mode == "header":
+ print("/* This file is auto-generated from %s */\n" % args.input,
file=outfp)
+ print("#include <rpc/rpc.h>", file=outfp)
+ for h in args.header:
+ print('#include "%s"' % h, file=outfp)
+ print("", file=outfp)
+ print("#pragma once\n", file=outfp)
+ generator = XDRTypeDeclarationGenerator(spec)
+ print(generator.visit(), file=outfp)
+ generator = XDRMarshallDeclarationGenerator(spec)
+ print(generator.visit(), file=outfp)
+ elif args.mode == "source":
+ print("/* This file is auto-generated from %s */\n" % args.input,
file=outfp)
+ print("#include <config.h>", file=outfp)
+ if args.input.endswith(".x"):
+ print('#include "%s.h"' % args.input[:-2], file=outfp)
+ for h in args.header:
+ print('#include "%s"' % h, file=outfp)
+ print("", file=outfp)
+ generator = XDRMarshallImplementationGenerator(spec)
+ print(generator.visit(), file=outfp)
+ elif args.mode == "repr":
+ print(spec, file=outfp)
+ else:
+ pass # Just validates XDR input syntax
+
+
+main()
--
2.39.1