add systemd service for rpm-based distros

.gitignore

@@ -8,5 +8,6 @@ runtime/wasm/target/
 .vscode
 polkadot.*
 !polkadot.service
+!.rpm/*
 .DS_Store
 .cargo

.rpm/polkadot.spec

@@ -0,0 +1,50 @@
+%define __spec_install_post %{nil}
+%define __os_install_post %{_dbpath}/brp-compress
+%define debug_package %{nil}
+
+Name: polkadot
+Summary: Implementation of a https://polkadot.network node in Rust based on the Substrate framework.
+Version: @@VERSION@@
+Release: @@RELEASE@@%{?dist}
+License: GPLv3
+Group: Applications/System
+Source0: %{name}-%{version}.tar.gz
+
+Requires: systemd, shadow-utils
+Requires(post): systemd
+Requires(preun): systemd
+Requires(postun): systemd
+
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
+
+%description
+%{summary}
+
+
+%prep
+%setup -q
+
+
+%install
+rm -rf %{buildroot}
+mkdir -p %{buildroot}
+cp -a * %{buildroot}
+
+%post
+config_file="/etc/default/polkadot"
+getent group polkadot >/dev/null || groupadd -r polkadot
+getent passwd polkadot >/dev/null || \
+    useradd -r -g polkadot -d /home/polkadot -m -s /sbin/nologin \
+    -c "User account for running polkadot as a service" polkadot
+if [ ! -e "$config_file" ]; then
+    echo 'POLKADOT_CLI_ARGS=""' > /etc/default/polkadot
+fi
+exit 0
+
+%clean
+rm -rf %{buildroot}
+
+%files
+%defattr(-,root,root,-)
+%{_bindir}/*
+/usr/lib/systemd/system/polkadot.service

Cargo.toml

@@ -107,3 +107,6 @@ buildflags = ["--release"]
 
 [package.metadata.rpm.targets]
 polkadot = { path = "/usr/bin/polkadot" }
+
+[package.metadata.rpm.files]
+"../scripts/packaging/polkadot.service" = { path = "/usr/lib/systemd/system/polkadot.service", mode = "644" }

README.md

@@ -19,18 +19,19 @@ either run the latest binary from our
 [releases](https://github.com/paritytech/polkadot/releases) page, or install
 Polkadot from one of our package repositories.
 
+Installation from the debian or rpm repositories will create a `systemd`
+service that can be used to run a Polkadot node. This is disabled by default,
+and can be started by running `systemctl start polkadot`. By default, it will
+run as the `polkadot` user.  Command-line flags passed to the binary can be
+customised by editing `/etc/default/polkadot`. This file will not be
+overwritten on updating polkadot. You may also just run the node directly from
+the command-line.
+
 ### Debian-based (Debian, Ubuntu)
 
 Currently supports Debian 10 (Buster) and Ubuntu 20.04 (Focal), and
 derivatives.
 
-Installation from the repository will create a `systemd` service that can be
-used to run a Polkadot node. This is disabled by default, and can be started by
-running `systemctl start polkadot`. By default, it will run as the `polkadot`
-user.  Command-line flags passed to the binary can be customised by editing
-`/etc/default/polkadot`. This file will not be overwritten on updating
-polkadot. You may also just run the node directly from the command-line.
-
 ```
 # Import the security@parity.io GPG key
 curl -fsSL 'https://keys.mailvelope.com/pks/lookup?op=get&search=security%40parity.io&options=mr&exact=on' | apt-key add -