Debconf

lastmod 2020-03-03created 2020-03-0310 edits

Debconf is the Debian package configuration management system. Packages use Debconf to ask questions when they are installed.

Non interactive mode

Set the DEBIAN_FRONTEND=noninteractive environment variable.

How to use

First, create the directory and file structure that will hold the files to build.

# 빌드할 대상을 모아놓을 작업 디렉토리:
mkdir pkg-build-essential

# 데비안 패키지 설정 디렉토리 및 파일들:
mkdir pkg-build-essential/DEBIAN
touch pkg-build-essential/DEBIAN/control
touch pkg-build-essential/DEBIAN/preinst
touch pkg-build-essential/DEBIAN/postinst

# 위에서 작성한 DEBIAN 디렉토리 외의 모든 디렉토리는 패키지 설치시 root 디렉토리 밑에 그대로 복사된다.
mkdir pkg-build-essential/usr
mkdir pkg-build-essential/usr/local
mkdir pkg-build-essential/usr/local/bin
mkdir pkg-build-essential/usr/local/lib
mkdir pkg-build-essential/usr/local/include

With dh_make, you can create the directories for Debian packaging interactively.

Write the control file.

Package: pkg-build-essential
Version: 1.3.4
Section: devel
Priority: optional
Architecture: all
Depends: build-essential, subversion, openjdk-7-jdk, libmysqlclient-dev, libmysql++-dev,
    libcurl4-openssl-dev,libjson0, libjson0-dev, libjsoncpp0, libjsoncpp-dev, python-twisted-core,
    flex, cmake
Recommends: libjson0-dbg, python-mysqldb
Maintainer: Developers <[email protected]>
Homepage: http://kukuta.tistory.com
Description: Server Development base library install package
    1.0.1 : bug fetch..#1
    1.1.1 : bug fetch..#2
    1.2.0 : bug fetch..#3

When content spans multiple lines, from the second line on there must be a whitespace character such as a tab or space at the very start of the line.

For packaging, use the dpkg command.

$ dpkg -b pkg-build-essential

When it finishes, a pkg-build-essential.deb file is created.

To install, use dpkg -i {패키지경로}. However, it does not automatically download the packages listed in Depends; instead it fails with an error that those packages are required but not installed. To have dependent packages installed automatically, use gdebi.

$ sudo apt-get update
$ sudo apt-get install gdebi-core
$ sudo gdebi pkg-build-essential.deb

Or just install it the easy way with apt-get.

Basic install step

On first install:

$ sudo apt-get install ./answer-pack_1.0.0.deb
Preparing to unpack .../c2pack/answer-pack_1.0.0.deb ...
[new-preinst] install(old-version=1.0.0,new-version=1.0.0)
Unpacking answer-pack (1.0.0) ...
Setting up answer-pack (1.0.0) ...
[postinst] configure(old-version=1.0.0)

On update:

$ sudo apt-get install ./answer-pack_1.0.1.deb
Preparing to unpack .../c2pack/answer-pack_1.0.1.deb ...
[old-prerm] upgrade(new-version=1.0.1)
[new-preinst] upgrade(old-version=1.0.0,new-version=1.0.1)
Unpacking answer-pack (1.0.1) over (1.0.0) ...
[old-postrm] upgrade(new-version=1.0.1)
Setting up answer-pack (1.0.1) ...
[postinst] configure(old-version=1.0.0)

On removal:

$ sudo apt-get remove answer-pack
Removing answer-pack (1.0.1) ...
[prerm] remove()
[postrm] remove()

Troubleshooting

If a debconf package was misconfigured, you can reconfigure it as follows:

$ dpkg-reconfigure PACKAGE-NAME

Favorite site

Man page

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