Add jj specfile (#18)

Author: RelativeSure

specs/jj.spec

@@ -0,0 +1,34 @@
+%global debug_package %{nil}
+
+Name:    jj
+Version: 0.23.0
+Release: 1%{?dist}
+Summary: A Git-compatible VCS that is both simple and powerful
+
+License: Apache v2.0
+# https://github.com/martinvonz/jj/releases/download/v0.23.0/jj-v0.23.0-x86_64-unknown-linux-musl.tar.gz
+URL: https://github.com/martinvonz/jj
+Source: %{url}/releases/download/v%{version}/%{name}-v%{version}-x86_64-unknown-linux-musl.tar.gz
+Source1: https://raw.githubusercontent.com/martinvonz/jj/v%{version}/README.md
+Source2: https://raw.githubusercontent.com/martinvonz/jj/v%{version}/LICENSE
+
+%description
+%{summary}
+
+%prep
+%autosetup -c
+cp %{SOURCE1} CONFIGURATION.md
+cp %{SOURCE2} LICENSE
+
+%build
+
+%install
+install -p -D %{name} %{buildroot}%{_bindir}/%{name}
+
+%files
+%doc CONFIGURATION.md
+%license LICENSE
+%{_bindir}/%{name}
+
+%changelog
+%autochangelog