[Bug 1144373] [NEW] Workaround apt-ftparchive generating empty Packages.gz

[Daniel Dehennin]

Public bug reported:

Hello,

On my system with apt-ftparchive version 0.9.7.7, empty Packages.gz have
size 0 instead of 20 bytes for empty gzip file.

Steps to reproduce:

1) cat > apt-ftparchive.conf <<EOF
Dir::ArchiveDir ".";
Dir::OverrideDir ".";
Dir::CacheDir ".";
Default::Packages::Compress "gzip";

TreeDefault::Contents " ";


Tree "dists/whatever" {
    FileList "empty.list";
    Sections "main";
    Architectures "amd64";
}
EOF

2) > empty.list

3) mkdir -p dists/whatever/main/binary-amd64

4) apt-ftparchive generate apt-ftparchive.conf

5) ls -l dists/whatever/main/binary-amd64/

This cause troubles installing my custom CDROM, apt-cdrom fails with:

    Mar  1 16:06:15 base-installer: gzip: 
    Mar  1 16:06:15 base-installer: stdin: unexpected end of file

Then base installer fails to install lvm2 because it does not find it.

My workaround makes my custom CDROM work again.

Regards.

** Affects: debian-cd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: cdimage lucid

** Patch added: "Workaround for empty gzip files"
   https://bugs.launchpad.net/bugs/1144373/+attachment/3556545/+files/scanpackages.diff

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https://bugs.launchpad.net/bugs/1144373

Title:
  Workaround apt-ftparchive generating empty Packages.gz

Status in “debian-cd” package in Ubuntu:
  New

Bug description:
  Hello,

  On my system with apt-ftparchive version 0.9.7.7, empty Packages.gz
  have size 0 instead of 20 bytes for empty gzip file.

  Steps to reproduce:

  1) cat > apt-ftparchive.conf <<EOF
  Dir::ArchiveDir ".";
  Dir::OverrideDir ".";
  Dir::CacheDir ".";
  Default::Packages::Compress "gzip";

  TreeDefault::Contents " ";

  
  Tree "dists/whatever" {
      FileList "empty.list";
      Sections "main";
      Architectures "amd64";
  }
  EOF

  2) > empty.list

  3) mkdir -p dists/whatever/main/binary-amd64

  4) apt-ftparchive generate apt-ftparchive.conf

  5) ls -l dists/whatever/main/binary-amd64/

  This cause troubles installing my custom CDROM, apt-cdrom fails with:

      Mar  1 16:06:15 base-installer: gzip: 
      Mar  1 16:06:15 base-installer: stdin: unexpected end of file

  Then base installer fails to install lvm2 because it does not find it.

  My workaround makes my custom CDROM work again.

  Regards.

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