spec: introduce conditionals for upstream vendoring (RHEL opt-in)

rust-zincati.spec

@@ -1,12 +1,12 @@
 # Generated by rust2rpm 15
 %bcond_without check
-%global __cargo_skip_build 0
 
+%global __cargo_skip_build 0
 %global crate zincati
 
 Name:           rust-%{crate}
 Version:        0.0.19
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Update agent for Fedora CoreOS
 
 # Upstream license specification: Apache-2.0
@@ -14,11 +14,18 @@ License:        ASL 2.0
 URL:            https://crates.io/crates/%{crate}
 Source0:        %{crates_source}
 Source1:        https://github.com/coreos/%{crate}/releases/download/v%{version}/%{crate}-%{version}-vendor.tar.gz
-Patch0:         zincati-fix-metadata.diff
+%if 0%{?fedora}
+Patch0:         fedora-tweak-cargo-manifest.diff
+%endif
 
 ExclusiveArch:  %{rust_arches}
 
+%if 0%{?rhel}
+BuildRequires:  rust-toolset
+%else
 BuildRequires:  rust-packaging
+%endif
+BuildRequires:  pkgconfig(openssl)
 BuildRequires:  systemd-rpm-macros
 
 Requires:       polkit
@@ -74,11 +81,18 @@ License:        ASL 2.0 and BSD and MIT and MPLv2.0 and zlib
 %systemd_postun_with_restart zincati.service
 
 %prep
-%autosetup -n %{crate}-%{version_no_tilde} -p1
+%autosetup -N -n %{crate}-%{version_no_tilde}
+%if 0%{?rhel}
+%cargo_prep -V 1
+%else
 %cargo_prep
+%endif
+%autopatch -p1
 
+%if !0%{?rhel}
 %generate_buildrequires
 %cargo_generate_buildrequires
+%endif
 
 %build
 %cargo_build
@@ -114,6 +128,9 @@ ln -snf /run/%{crate}/public/metrics.promsock %{buildroot}/run/%{crate}/private/
 %endif
 
 %changelog
+* Thu Apr 08 2021 Luca BRUNO <lucab@lucabruno.net> - 0.0.19-2
+- Introduce conditionals for upstream vendoring (RHEL opt-in).
+
 * Tue Mar 23 2021 Kelvin Fan <kfan@redhat.com> - 0.0.19-1
 - New upstream version
   https://github.com/coreos/zincati/releases/tag/v0.0.19