Temporarily bundle serde_with and its dependencies

rust-serde_with doesn't include the default "macros" feature.  Bundle
serde_with and its dependencies while we sort out this mess.

bundle-serde_with.patch

@@ -0,0 +1,11 @@
+--- coreos-installer-0.12.0/Cargo.toml.old	2021-12-17 15:04:38.560516015 -0500
++++ coreos-installer-0.12.0/Cargo.toml	2021-12-17 16:45:29.567815138 -0500
+@@ -120,7 +120,7 @@
+ version = "^1.0"
+ 
+ [dependencies.serde_with]
+-version = "1.9.4"
++path = "vendor/serde_with"
+ 
+ [dependencies.serde_yaml]
+ version = "0.8"

rust-coreos-installer.spec

@@ -23,6 +23,16 @@ Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{
 Source1:        https://github.com/coreos/%{crate}/releases/download/v%{version}/%{crate}-%{version}-vendor.tar.gz
 Source2:        https://github.com/coreos/coreos-installer-dracut/archive/%{dracutcommit}/coreos-installer-dracut-%{dracutshortcommit}.tar.gz
 
+# rust-serde_with doesn't include the default "macros" feature.  Bundle
+# serde_with and its dependencies while we sort out this mess.
+Patch1:         bundle-serde_with.patch
+BuildRequires:  rust-ident_case+default-devel
+Provides:       bundled(crate(darling)) = 0.13.0
+Provides:       bundled(crate(darling_core)) = 0.13.0
+Provides:       bundled(crate(darling_macro)) = 0.13.0
+Provides:       bundled(crate(serde_with)) = 1.11.0
+Provides:       bundled(crate(serde_with_macros)) = 1.5.1
+
 ExclusiveArch:  %{rust_arches}
 %if 0%{?rhel} && !0%{?eln}
 BuildRequires:  rust-toolset
@@ -96,6 +106,18 @@ directory = "vendor"
 EOF
 %else
 %cargo_prep
+# FIXME: until the serde_with package provides the macros feature
+tar xvf %{SOURCE1}
+mkdir -p .cargo
+cat >>.cargo/config << EOF
+[patch.crates-io]
+darling = { path = 'vendor/darling' }
+darling_core = { path = 'vendor/darling_core' }
+darling_macro = { path = 'vendor/darling_macro' }
+serde_with = { path = 'vendor/serde_with' }
+serde_with_macros = { path = 'vendor/serde_with_macros' }
+EOF
+# /FIXME
 %endif
 # Fix SIGSEGV in tests on s390x
 # https://bugzilla.redhat.com/show_bug.cgi?id=1883457
@@ -192,6 +214,7 @@ from the initramfs.
 %changelog
 * Fri Dec 17 2021 Benjamin Gilbert <bgilbert@redhat.com> - 0.12.0-1
 - New release
+- Temporarily bundle serde_with and its dependencies
 
 * Wed Dec 15 2021 Sohan Kunkerkar <skunkerk@redhat.com> - 0.11.0-3
 - Remove conditional around sourcing the vendor tarball