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Antes De Empezar Antes de empezar... ● Láminas (y quizás video) en bureado.com ● Aplicaciones->Accesorios->Terminal – sudo aptitude update – sudo aptitude install gems – gems-client 10.2.205.219 ● Aplicaciones->Accesorios->Terminal – sudo aptitude install dpkg-dev devscripts Taller de empaquetamiento de software bajo el sistema APT José Miguel Parrella Romero (bureado) Debian Developer Problemática ● La mayoría del software libre crece de forma orgánica, generando un problema de acceso ● ca 1993 se empezó a atender el problema de la distribución de software libre al público ● En 1998, Debian libera APT: Advanced Packaging Tool como propuesta – Facilitar la distribución de software libre – Hacer elegante y escalable la distribución – Hoy en día, el sistema de paquetes más usado Otros sistemas de paquetes ● Derivados de APT ● Sistemas agnósticos (ipkg/opkg, Fink) postmodernos ● RPM y frontends – PackageKit contemporáneos – Conary usados en Red Hat, – Smart SuSe y derivados – ZeroInstall ● Paquetes basados – CoApp en fuentes como – Ponga su nombre Arch (pacman) y aquí... también Slackware (swaret) Objetivos funcionales ● Ubicar un pedazo de software en cualquier parte del mundo, en demanda – If you can't apt-get it, it isn't useful or doesn't exist ● Encargarse de conseguir y preparar todas las dependencias para el software ● Instalar el software para su uso inmediato ● Preconfigurar el software, opcionalmente de acuerdo a instrucciones del usuario ● Gestionar actualizaciones y remociones Componentes de APT Paquete Repo fuente ● Paquetes binarios físicos (.deb) ● Build Paquetes fuentes daemon físicos (.dsc, .tar.gz) Listas de paquetes ● Listas de paquetes (Release y Packages[.*]) ● Repositorios (HTTP, Developers FTP, SSH...) Paquetes binarios Escenarios (objetivos) ● Reconstruir un paquete de software existente con nuevas opciones y/o cambios ● Crear un paquete de software para una nueva aplicación ● Discusión sobre otros escenarios (si el tiempo lo permite) – Aplicaciones Web – Módulos de lenguajes (Perl, Python...) ● Buenos ciudadanos en Debian (y Ubuntu) Buscando las fuentes... ● ¿Sabemos cómo se llama? – http://packages.debian.org/src:<paquete> ● Buscamos el archivo DSC (a la derecha) ● En un terminal, dget <archivo DSC> – O si tenemos entradas deb-src en sources.list: ● apt-get source <paquete> ● ¿No sabemos cómo se llama? – aptitude search <término> – dpkg -S <archivo> – apt-file El contenido de un paquete fuente ● debian/ ● Los archivos bajo la – control carpeta debian/ son los que determinan – changelog la forma de – copyright construcción del – rules paquete – ...y hay más ● Distintos ayudantes y funciones requieren distintos archivos en la carpeta debian/ debian/control ● Es generalmente informativo ● Los tres aspectos más importantes: – Nombres de los paquetes binarios – Dependencias para construir el paquete – Arquitecturas en las que se ejecuta el paquete ● any corre en todas las arquitecturas de Debian ● all es independiente de la arquitectura utilizada debian/changelog ● Es generalmente inútilmente informativo ● Sin embargo, de su sintaxis se determina la versión del paquete debian/rules ● Es un Makefile ● Su contenido determina cómo se construye el paquete ● Se pueden llamar los siguientes objetivos: – clean limpia el entorno de trabajo – binary crea el/los paquetes/s binario/s – build construye el software ¡Quiero saber más! ● Debian Policy ● Presentación en: – bureado.com ● Twitter/Identi.ca – @bureado ● Correo electrónico – [email protected] ● Comunidad en Ecuador: – www.debian.ec .
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