Debhelper

From Wikipedia, the free encyclopedia

The correct title of this article is debhelper. The initial letter is shown capitalized due to technical restrictions.

debhelper is a suite of programs originally written by Joey Hess that help a Debian packager write a rules files. A rules file is a Makefile that contains instructions for building and creating a Debian package.

There are many tasks that need to be performed over and over again in the rules files. Instead of cutting and pasting code to do these tasks, debhelper allows a packager to simply call one of its 51 programs to do the task for them.

debhelper can greatly simplify things. Debian includes packages of GNU hello made both with and without debhelper as examples for packagers. The rules file that does not use debhelper is 1,978 characters. In contrast, the version that uses debhelper is 1,022 characters.

Related to debhelper, there is also a tool called dh_make. dh_make copies templates of all of the files needed to build a debian package to the source directory of a program. These templates are customized slightly based on information that the user gives and on a cursory examination of how the source code is built. After running dh_make, a developer still has to edit most of the template files to be able to build the package.

Although closely related to it, dh_make is not part of debhelper; it was separately developed by Craig Small.

CDBS builds on debhelper to allow a user to write even shorter rules files.

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