85 lines
3.2 KiB
Plaintext
85 lines
3.2 KiB
Plaintext
This README explains how packages are added to full CDs and DVDs based
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on tasks defined in tasksel.
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Note that this document describes the default configuration for debian-cd.
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Overview
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========
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One of the main factors deciding in what order packages are added,
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especially for the first DVD and earlier CDs, is the definition of which
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tasksel tasks should be used.
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The list of packages to be added is generated dynamically at build time.
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The procedure is somewhat complex and involves a number of (intermediate)
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files.
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The general sequence in which packages are added for "complete" images is:
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1) Packages required by Debian Installer
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2) Packages required to install the base system (debootstrap)
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3) Any packages with priority "standard" or higher
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4) Packages from tasksel tasks
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a) Packages defined as "key" packages for primary tasksel tasks
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b) Packages defined as "key" packages for language tasks (in the order:
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'<language>', '<language>-desktop', '<language>-<desktop>-desktop');
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only language desktop tasks that correspond to a primary task are
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included
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c) Regular packages from primary tasksel tasks
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d) Regular packages from language tasks
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e) Key packages from secondary tasksel tasks
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f) Key packages from language tasks corresponding to secondary tasksel
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tasks
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g) Regular packages from secondary tasksel tasks
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h) Regular packages from language tasks corresponding to secondary
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tasksel tasks
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5) Other packages in the order of their popularity (popcon score)
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A tasksel task is defined as "secondary" by adding a '-' after its name
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in a task.list file; other tasksel tasks are "primary".
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Language tasks are added grouped per type, not per language. So with three
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languages (A, B, C) and 'desktop' and 'gnome-desktop' as tasks you'll get:
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A
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B
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C
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A-desktop
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B-desktop
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C-desktop
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A-gnome-desktop
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B-gnome-desktop
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C-gnome-desktop
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Note that <language>-desktop tasks are always sorted before any
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<language>-<desktop>-desktop tasks.
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Files involved
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==============
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Static task files (can be found in tasks/codename):
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- Debian-generic or Debian-<desktop>:
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top level task file; defines order of other task files to be used,
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including task-essential-[generic|<desktop>] and
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task-full-[generic|<desktop>]
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- task.list.generic or task.list.<desktop>:
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tasksel tasks to be included
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Dynamically generated task files created at build time (can be found in
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the subdirectory tasks under the working directory for the build):
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- task.languages
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copy of the actual language list to be used to add language tasks
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(see "Language list used at build time" below)
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- task.gen.[generic|<desktop>].primary:
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contains primary tasks from task.list.[generic|<desktop>] followed by
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corresponding language tasks
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- task.gen.[generic|<desktop>].secondary:
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contains secondary tasks from task.list.[generic|<desktop>] and
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corresponding language tasks
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- task-essential-[generic|<desktop>]:
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list of key packages based on task.gen.[generic|<desktop>].primary;
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corresponds to 3a/3b from overview above
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- task-full-[generic|<desktop>]:
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list of packages based on both task.gen.[generic|<desktop>].primary and
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task.gen.[generic|<desktop>].secondary; corresponds to 3c-3h from overview
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above
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The generation of these files is done early in a build by the script
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tools/update_tasks.
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