Adapt to new packaging

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

rust-peeking_take_while.spec

@@ -6,9 +6,10 @@
 
 Name:           rust-%{crate}
 Version:        0.1.2
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Like `Iterator::take_while`, but calls the predicate on a peeked value
 
+# Upstream license specification: Apache-2.0/MIT
 License:        ASL 2.0 or MIT
 URL:            https://crates.io/crates/peeking_take_while
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
@@ -17,21 +18,39 @@ ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
 
-%description
-%{summary}.
+%global _description \
+Like `Iterator::take_while`, but calls the predicate on a peeked value. This\
+allows you to use `Iterator::by_ref` and `Iterator::take_while` together, and\
+still get the first value for which the `take_while` predicate returned false\
+after dropping the `by_ref`.
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
-Like `Iterator::take_while`, but calls the predicate on a peeked value. This
-allows you to use `Iterator::by_ref` and `Iterator::take_while` together, and
-still get the first value for which the `take_while` predicate returned false
-after dropping the `by_ref`.
+%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-APACHE LICENSE-MIT
+%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 +67,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-APACHE LICENSE-MIT
-%doc README.md
-%{cargo_registry}/%{crate}-%{version}/
-
 %changelog
+* Sun Nov 04 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.1.2-5
+- Adapt to new packaging
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.1.2-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild