diff options
author | Jakub Kicinski <kuba@kernel.org> | 2023-11-29 22:36:22 +0300 |
---|---|---|
committer | Jakub Kicinski <kuba@kernel.org> | 2023-11-30 03:07:00 +0300 |
commit | a115b9279f4897b8afdfbc30035b1382c047fc26 (patch) | |
tree | 9270fe94b20e60693f5a1cb5fc86f7de8ce65830 /tools/net | |
parent | 9cf9b57082411ad42d6d12c7b857e60add673877 (diff) | |
download | linux-a115b9279f4897b8afdfbc30035b1382c047fc26.tar.xz |
tools: ynl: don't skip regeneration from make targets
Commit 2b7ac0c87d98 ("tools: ynl-gen: don't touch the output file if
content is the same") is working too well. It was added so that
ynl-regen -f doesn't make us rebuild half of the kernel, if there
are no actual changes in any generated code.
When ynl-gen-c is called by make, however, we're better off trusting
make's tracking and overwrite the file. Otherwise if output is identical
we won't update file timestamps and make will retry code gen on every
invocation.
Link: https://lore.kernel.org/r/20231129193622.2912353-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/net')
-rwxr-xr-x | tools/net/ynl/ynl-gen-c.py | 12 | ||||
-rwxr-xr-x | tools/net/ynl/ynl-regen.sh | 4 |
2 files changed, 10 insertions, 6 deletions
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py index cbbda276f6d1..ba1c3611c6fa 100755 --- a/tools/net/ynl/ynl-gen-c.py +++ b/tools/net/ynl/ynl-gen-c.py @@ -1164,8 +1164,9 @@ class RenderInfo: class CodeWriter: - def __init__(self, nlib, out_file=None): + def __init__(self, nlib, out_file=None, overwrite=True): self.nlib = nlib + self._overwrite = overwrite self._nl = False self._block_end = False @@ -1186,8 +1187,9 @@ class CodeWriter: return # Avoid modifying the file if contents didn't change self._out.flush() - if os.path.isfile(self._out_file) and filecmp.cmp(self._out.name, self._out_file, shallow=False): - return + if not self._overwrite and os.path.isfile(self._out_file): + if filecmp.cmp(self._out.name, self._out_file, shallow=False): + return with open(self._out_file, 'w+') as out_file: self._out.seek(0) shutil.copyfileobj(self._out, out_file) @@ -2516,6 +2518,8 @@ def main(): parser.add_argument('--header', dest='header', action='store_true', default=None) parser.add_argument('--source', dest='header', action='store_false') parser.add_argument('--user-header', nargs='+', default=[]) + parser.add_argument('--cmp-out', action='store_true', default=None, + help='Do not overwrite the output file if the new output is identical to the old') parser.add_argument('--exclude-op', action='append', default=[]) parser.add_argument('-o', dest='out_file', type=str, default=None) args = parser.parse_args() @@ -2543,7 +2547,7 @@ def main(): print(f'Message enum-model {parsed.msg_id_model} not supported for {args.mode} generation') os.sys.exit(1) - cw = CodeWriter(BaseNlLib(), args.out_file) + cw = CodeWriter(BaseNlLib(), args.out_file, overwrite=(not args.cmp_out)) _, spec_kernel = find_kernel_root(args.spec) if args.mode == 'uapi' or args.header: diff --git a/tools/net/ynl/ynl-regen.sh b/tools/net/ynl/ynl-regen.sh index bdba24066cf1..a37304dcc88e 100755 --- a/tools/net/ynl/ynl-regen.sh +++ b/tools/net/ynl/ynl-regen.sh @@ -30,8 +30,8 @@ for f in $files; do fi echo -e "\tGEN ${params[2]}\t$f" - $TOOL --mode ${params[2]} --${params[3]} --spec $KDIR/${params[0]} \ - $args -o $f + $TOOL --cmp-out --mode ${params[2]} --${params[3]} \ + --spec $KDIR/${params[0]} $args -o $f done popd >>/dev/null |