net-libs/rustls-ffi: drop nightly use (again)

Signed-off-by: Sam James <sam@gentoo.org>

net-libs/rustls-ffi/files/rustls-ffi-0.12.1-no-rust-nightly.patch

@@ -0,0 +1,48 @@
+https://github.com/rustls/rustls-ffi/issues/397
+https://github.com/rustls/rustls-ffi/pull/398
+
+From 9890aff0f0b1cc69f86c24b217a2515525e57056 Mon Sep 17 00:00:00 2001
+From: Daniel McCarney <daniel@binaryparadox.net>
+Date: Wed, 27 Mar 2024 21:08:16 -0400
+Subject: [PATCH] Cargo: configure cargo-c to use vendored .h
+
+Presently we pre-generate the rustls.h header file using `cbindgen`,
+commit the result to `src/rustls.h`, and check that the generated result
+matches the checked-in result in CI.
+
+The new experimental cargo-c build regenerates its own header file using
+`cbindgen` by default unless told to do otherwise. We'd prefer it didn't
+do this because we're using a `cbindgen` feature that requires nightly
+rust.
+
+This commit updates the `Cargo.toml` capi metadata to tell cargo-c to
+skip generation of its own header file. We then configure the
+pre-generated checked-in header file as an asset to be copied into the
+install include directory.
+
+This better matches how the `Makefile` build allowed building the static
+lib without needing nightly rust or `cbindgen`.
+---
+ Cargo.toml | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/Cargo.toml b/Cargo.toml
+index 7a910a9d..d601c7f8 100644
+--- a/Cargo.toml
++++ b/Cargo.toml
+@@ -41,6 +41,7 @@ regex = "1.9.6"
+ [package.metadata.capi.header]
+ name = "rustls"
+ subdirectory = false
++generation = false # Prefer a vendored .h
+ 
+ [package.metadata.capi.library]
+ name = "rustls"
+@@ -50,3 +51,6 @@ rustflags = "-Cmetadata=rustls-ffi"
+ [package.metadata.capi.pkg_config]
+ name = "rustls"
+ filename = "rustls"
++
++[package.metadata.capi.install.include]
++asset = [{from = "src/rustls.h", to = "" }]
+

net-libs/rustls-ffi/rustls-ffi-0.12.1-r2.ebuild

@@ -56,6 +56,10 @@ BDEPEND="dev-util/cargo-c"
 
 QA_FLAGS_IGNORED="usr/lib.*/librustls.*"
 
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.12.1-no-rust-nightly.patch
+)
+
 src_prepare() {
 	default
 
@@ -70,9 +74,6 @@ src_configure() {
 	# Hopefully fixed with https://github.com/rustls/rustls-ffi/pull/389
 	export RUSTFLAGS="${RUSTFLAGS} -C link-arg=-Wl,-z,notext"
 
-	# https://github.com/rustls/rustls-ffi/issues/397
-	export RUSTC_BOOTSTRAP=1
-
 	multilib-minimal_src_configure
 }