Build a Simple RPM Package

Prerequisite

Install package that contain the rpmbuild tool that create the rpm package.

$ yum install rpm-build

Install also a convenient development tool for setting up environment.

$ yum install rpmdevtools

When building rpm package you should do that with a noon root user. To create a new user.

$ useradd rpmuser

Setup

Change to rpm user and from it's home directory run:

$ rpmdev-setuptree

This will create a new empty catalogue structure for your rpm package development.

Creating the Program

$ vi ~/rpmbuild/SOURCES/hello.sh

#!/bin/bash
echo "Good morning, world."

We can test run to see that it actually runs.

$ chmod +x ~/rpmbuild/SOURCES/hello.sh
$ ~/rpmbuild/SOURCES/hello.sh
Good morning, world.

Creating the RPM Spec File

Now with help of wim, that will create a template spec file, we will create a rpm spec file for our hello rpm package.

$ vim ~/rpmbuild/SPECS/hello.spec
Name:   hello  
Version: 1.0 
Release: 1%{?dist}
Summary:  A simple hello world application. 

Group:  Applications/File
License: GPLv2+
URL:  http://magnus-k-karlsson.blogspot.se/  
Source0: hello.sh 
BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)

#BuildRequires: 
Requires: bash

%description

# Prep is used to set up the environment for building the rpm package
# Expansion of source tar balls are done in this section
#%prep
#%setup -q

# Used to compile and to build the source
#%build
#%configure
#make %{?_smp_mflags}

# The installation.
%install
rm -rf %{buildroot}
#make install DESTDIR=%{buildroot}
mkdir -p %{buildroot}/usr/bin
cp %{SOURCE0} $RPM_BUILD_ROOT/usr/bin/.

%clean
rm -rf %{buildroot}

%files
%defattr(-,root,root,-)
/usr/bin/hello.sh
%doc

%changelog

Build the RPM

$ rpmbuild -ba ~/rpmbuild/SPECS/hello.spec

Test the RPM

Query (q) the local package (p) for all it's files (l).

$ rpm -qpl rpmbuild/RPMS/x86_64/hello-1.0-1.el6.x86_64.rpm
/usr/bin/hello.sh

Now switch to root and install the package.

$ rpm -pi /home/rpmuser/rpmbuild/RPMS/x86_64/hello-1.0-1.el6.x86_64.rpm

And test it.

$ hello.sh 
Good morning, world.

And to uninstall it.

$ yum erase hello
...