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#REDIRECT [[Fedora_RPM_Build]]
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= Fedora RPM Build =
== Structure ==
To build an rpm must be created and/or placed different files under <tt>/usr/src/redhat</tt> as follow:
# Spec file with details of name, dependencies, instructions, etc and script of how to build the rpm under <tt>SPEC</tt> folder
# Compressed file with the sources under <tt>SOURCES</tt> folder

== Build ==
To build the new rpm, run the command:
# rpmbuild -ba SPEC/newrpm.spec

The created files will be placed as follow:
# New RPM created under <tt>RPMS/''system_architecture''</tt> folder
# RPM with sources and spec file packed under <tt>SRPMS</tt> folder
# Unpacked sources under <tt>BUILD</tt> folder

== Scripts ==
There are 4 types of scripts:
# Pre install: pre
# Post install: post
# Pre uninstall: preun
# Post uninstall: postun

The <tt>rpm</tt> command has 3 main types of execution to be considered:
# install
rpm -i newrpm.rpm

# upgrade
rpm -u newrpm.rpm

# remove
rpm -e newrpm.rpm
: and different values are passed to each script based on which type of execution is performed by the <tt>rpm</tt> command.

{{Warningbox | Warning |
* Be careful with the usage of each script section, please note the execution order which is crucial at upgrade time.
* When importing specs from other distros use remove `%` in from of `make`}}


==== New installation ====
The execution order and values passed are:
* %pre NEW_PACKAGE ($1 = 1)
* %install
* %post NEW_PACKAGE ($1 = 1)

==== Upgrade ====
The execution order and values passed are:
* %pre
''NEW_PACKAGE'' `($1 = 2)`
* %install
* %post
''NEW_PACKAGE'' `($1 = 2)`
* %preun
''OLD_PACKAGE'' `($1 = 1)`
* %files
''NEW_PACKAGE, Delete all files no longer listed''
* %postun
''OLD_PACKAGE'' `($1 = 1)`

==== Remove ====
The execution order and values passed are:
* %preun
''OLD_PACKAGE'' `($1 = 0)`
* %files
''OLD_PACKAGE, Delete all files listed''
* %postun
''OLD_PACKAGE'' `($1 = 0)`

Latest revision as of 22:18, 6 June 2015

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