[PATCH] drivers: video: logo: Don't mention the full path of the input in output

[Helge Deller]

On 4/4/24 18:44, Lucas Stach wrote:
> Am Donnerstag, dem 04.04.2024 um 15:15 +0200 schrieb Helge Deller:
>> On 4/4/24 14:18, Lucas Stach wrote:
>>> This change strips $abs_srctree of the input file containing the
>>> PNM data in the generated output. The motivation for this change
>>> is Yocto emitting a build warning
>>>
>>>       WARNING: linux-foo-6.8-r0 do_package_qa: QA Issue:
>>>       File /usr/src/debug/linux-foo/6.8-r0/drivers/video/logo/logo_linux_clut224.c
>>>       in package linux-foo-src contains reference to TMPDIR
>>>
>>> So this change brings us one step closer to make the build result
>>> reproducible independent of the build path.
>>>
>>> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
>>> ---
>>>    drivers/video/logo/pnmtologo.c | 14 +++++++++++++-
>>>    1 file changed, 13 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/video/logo/pnmtologo.c b/drivers/video/logo/pnmtologo.c
>>> index 2434a25afb64..59ccd721e8af 100644
>>> --- a/drivers/video/logo/pnmtologo.c
>>> +++ b/drivers/video/logo/pnmtologo.c
>>> @@ -223,6 +223,18 @@ static inline int is_equal(struct color c1, struct color c2)
>>>
>>>    static void write_header(void)
>>>    {
>>> +	const char *abs_srctree = getenv("abs_srctree");
>>> +	const char *rel_filename;
>>> +
>>> +	if (abs_srctree &&
>>> +	    !strncmp(abs_srctree, filename, strlen(abs_srctree))) {
>>> +		rel_filename = filename + strlen(abs_srctree);
>>> +		while (*rel_filename == '/')
>>> +			++rel_filename;
>>> +	} else {
>>> +		rel_filename = filename;
>>> +	}
>>> +
>>>    	/* open logo file */
>>>    	if (outputname) {
>>>    		out = fopen(outputname, "w");
>>> @@ -235,7 +247,7 @@ static void write_header(void)
>>>    	fputs("/*\n", out);
>>>    	fputs(" *  DO NOT EDIT THIS FILE!\n", out);
>>>    	fputs(" *\n", out);
>>> -	fprintf(out, " *  It was automatically generated from %s\n", filename);
>>> +	fprintf(out, " *  It was automatically generated from %s\n", rel_filename);
>>
>> can't you use instead: ?
>>> +	fprintf(out, " *  It was automatically generated from %s\n", basename(filename));
>>
> The difference to basename is that this keeps the path in the source
> tree intact, e.g. it shortens the absolute path to
> "drivers/video/logo/logo_linux_clut224.c", so the comment in the
> generated file still has a full reference to the file location in the
> source tree. It only strips out the part of the path that is host
> dependent.

That's true, but
a) it's just a comment which is generated, and
b) all source and generated logo files are in the [src|build]/drivers/video/logo/ directory anyway, and
c) the file name already suggests where it is generated from.

So, IMHO basically we could simply drop the whole comment line alltogether as well.

Helge