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Diffstat (limited to 'dselect/methods/multicd/README.multicd')
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diff --git a/dselect/methods/multicd/README.multicd b/dselect/methods/multicd/README.multicd new file mode 100644 index 0000000..19e5856 --- /dev/null +++ b/dselect/methods/multicd/README.multicd @@ -0,0 +1,100 @@ +Installation method for multiple binary CDs +------------------------------------------- + + This directory contains a method to be used within dselect in order to + access Debian binary packages stored across multiple binary CD-ROMs. + +Acquiring package data +--------------------- + + It is possible to access up to four binary directories within «dists/stable»: + + . main + . contrib + . non-free + . local + + The selected method will try to read the «Packages.cd» file from each + of these directories if it is available. + +Identifying the CD-ROM +---------------------- + + A unique name is associated to each CD. This name should correspond + with the label on the front of the CD. The name is also available on + the CD, so the system can find out which CD is in the drive at any + time. + +Installing the files +-------------------- + + At the beginning of the installation the “multicd” method will sort + the list of to-be-installed packages and install them CD by CD. If a + different CD-ROM is required the user will be prompted to exchange + the CD-ROM. + +Preparing multiple binary CD-ROMs +--------------------------------- + + Since the “multicd” method needs to know which packages are on which + CD-ROMs one cannot use regular «Packages» files. An additional data + field «X-Medium:» is required. The first CD-ROM from the set should + contain all «Packages.cd» files. To be more convenient you should + include the «Packages.cd» files on all CD-ROMs. This ensures that + you do not have to start with the first CD-ROM all the time. + + Additionally the package needs to gain information which CD-ROM is + currently used. Thus each CD-ROM contains the file «.disk/info» + which contains the symbolic name for the CD-ROM as specified by + «X-Medium:». + + In order to be able to create the modified «Packages.cd» files, you + have to use the «-M medium» option of dpkg-scanpackages (supported + in dpkg-dev since 1.15.5). + + To split the “main” distribution into two CD-ROMs you will need to + create a «Packages.cd» file for each «binary-$arch» directory. + Afterwards you simply append the second one to the first one and + put the resulting «Packages.cd» file into both «binary-$arch» + directories. + +Sample Layout +------------- + + CD1 .disk/info = "Debian GNU/Linux binary-amd64" + dists/stable/main/binary-all/ + binary-amd64/Packages.cd.gz + binary-amd64/net/foo.deb + contrib/binary-amd64/Packages.cd.gz + non-free/binary-amd64/Packages.cd.gz + + CD2 .disk/info = "Debian GNU/Linux contrib-amd64" + dists/stable/main/binary-amd64/Packages.cd.gz + contrib/binary-all/ + binary-amd64/Packages.cd.gz + binary-amd64/net/foo.deb + non-free/binary-amd64/Packages.cd.gz + + CD3 .disk/info = "Debian GNU/Linux non-free-amd64" + dists/stable/main/binary-amd64/Packages.cd.gz + contrib/binary-amd64/Packages.cd.gz + non-free/binary-all/ + binary-amd64/Packages.cd.gz + binary-amd64/net/foo.deb + + To re-generate the Packages file you have to change directory into + «dists/stable/$part» and issue «dpkg-scanpackages» as follows. It is + assumed that you use regular compressed overrides files in + «/pub/debian/indices». + + CD1: dpkg-scanpackages -M "Debian GNU/Linux binary-amd64" \ + binary-amd64 /pub/debian/indices/override.buster.gz \ + dists/stable/ > binary-amd64/Packages + + CD2: dpkg-scanpackages -M "Debian GNU/Linux contrib-amd64" \ + binary-amd64 /pub/debian/indices/override.buster.contrib.gz \ + dists/stable/ > binary-amd64/Packages + + CD3: dpkg-scanpackages -M "Debian GNU/Linux non-free-amd64" \ + binary-amd64 /pub/debian/indices/override.buster.non-free.gz \ + dists/stable/ > binary-amd64/Packages |