[PATCH] rust: docs: fix logo replacement

[Miguel Ojeda]

The static files placement by `rustdoc` changed in Rust 1.67.0 [1],
but the custom code we have to replace the logo in the generated
HTML files did not get updated.

Thus update it to have the Linux logo again in the output.

Hopefully `rustdoc` will eventually support a custom logo from
a local file [2], so that we do not need to maintain this hack
on our side.

Link: https://github.com/rust-lang/rust/pull/101702 [1]
Link: https://github.com/rust-lang/rfcs/pull/3226 [2]
Fixes: 3ed03f4da06e ("rust: upgrade to Rust 1.68.2")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx>
---
 rust/Makefile | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/rust/Makefile b/rust/Makefile
index 87958e864be0..08af1f869f0c 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -93,15 +93,14 @@ quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
 # and then retouch the generated files.
 rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \
     rustdoc-alloc rustdoc-kernel
-	$(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)
-	$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)
+	$(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/
+	$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/
 	$(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \
-		-e 's:rust-logo\.svg:logo.svg:g' \
-		-e 's:rust-logo\.png:logo.svg:g' \
-		-e 's:favicon\.svg:logo.svg:g' \
-		-e 's:<link rel="alternate icon" type="image/png" href="[./]*favicon-(16x16|32x32)\.png">::g'
-	$(Q)echo '.logo-container > img { object-fit: contain; }' \
-		>> $(rustdoc_output)/rustdoc.css
+		-e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \
+		-e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \
+		-e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g'
+	$(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \
+		echo ".logo-container > img { object-fit: contain; }" >> $$f; done
 
 rustdoc-macros: private rustdoc_host = yes
 rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \
-- 
2.42.0