Adapt to new packaging

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

rust-rustc_version.spec

@@ -7,9 +7,10 @@
 
 Name:           rust-%{crate}
 Version:        0.2.3
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Library for querying the version of a installed rustc compiler
 
+# Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/rustc_version
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
@@ -17,21 +18,38 @@ Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{
 ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
-# [dependencies]
-BuildRequires:  (crate(semver) >= 0.9.0 with crate(semver) < 0.10.0)
+BuildRequires:  (crate(semver/default) >= 0.9.0 with crate(semver/default) < 0.10.0)
 
-%description
-%{summary}.
+%global _description \
+A library for querying the version of a installed rustc compiler.
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
-A library for querying the version of a installed rustc compiler.
+%description    devel %{_description}
 
 This package contains library source intended for building other packages
-which use %{crate} from crates.io.
+which use "%{crate}" crate.
+
+%files          devel
+%license LICENSE-MIT LICENSE-APACHE
+%doc README.md
+%{cargo_registry}/%{crate}-%{version}/
+
+%package     -n %{name}+default-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+default-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "default" feature of "%{crate}" crate.
+
+%files       -n %{name}+default-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version} -p1
@@ -48,12 +66,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-MIT LICENSE-APACHE
-%doc README.md
-%{cargo_registry}/%{crate}-%{version}/
-
 %changelog
+* Sat Oct 27 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.2.3-3
+- Adapt to new packaging
+
 * Sun Oct 07 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.2.3-2
 - Run tests in infrastructure