Use vendored dependencies in RHEL builds

RHEL does not ship individual Rust dependency packages.  However,
upstream does provide vendor tarballs which simplifies this greatly.

.gitignore

@@ -8,3 +8,4 @@
 /mdevctl-1.0.0.crate
 /mdevctl-1.1.0.crate
 /mdevctl-1.2.0.crate
+/mdevctl-1.2.0-vendor.tar.gz

mdevctl.spec

@@ -10,8 +10,14 @@ Summary:        A mediated device management utility for Linux
 License:        LGPLv2
 URL:            https://crates.io/crates/mdevctl
 Source:         %{crates_source}
+Source1:        https://github.com/mdevctl/mdevctl/releases/download/v%{version}/mdevctl-%{version}-vendor.tar.gz
 
-BuildRequires: make systemd rust-packaging python3-docutils
+BuildRequires: make systemd python3-docutils
+%if 0%{?rhel}
+BuildRequires:  rust-toolset
+%else
+BuildRequires:  rust-packaging >= 21
+%endif
 Requires(post,postun): %{_sbindir}/udevadm
 
 %description
@@ -23,10 +29,14 @@ vfio-mdev for assignment to virtual machines.
 
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
+%if 0%{?rhel}
+%cargo_prep -V 1
+%else
 %cargo_prep
 
 %generate_buildrequires
 %cargo_generate_buildrequires
+%endif
 
 %build
 %cargo_build

sources

@@ -1 +1,2 @@
 SHA512 (mdevctl-1.2.0.crate) = e4880842780d1f3e29da1671151a8415b2b19172bbc379804e4f12a8609b6455d7da68857f9cd77a9e0473024000e80914d3158c781c4291b4814455af254175
+SHA512 (mdevctl-1.2.0-vendor.tar.gz) = 752ad0fe393d2f466dda8da1aefb04f22f447ef288873cb350f0b1ae67f8caae49315be6ea413fd2cbdd89afc1889b8d8e082fe416c45dfa1a4613e0d05943c3