[Bug 1365008] [NEW] allow about->"software licenses" to read gzip'd files to reclaim some more disk space

[James Hunt]

Public bug reported:

/usr/share/doc is stripped down to only the copyright files and yet...

$ du -sh /usr/share/doc
19M     /usr/share/doc

Compressing even just the copyrights gives an appreciable gain:

$ cp -a /usr/share/doc /tmp/foo
$ find /tmp/foo/ -type f -exec gzip -9 {} \; && du -sh /tmp/foo
5.5M    /tmp/foo

A saving of 13+ Meg!

However, for this to be useful, the software licenses view would need to
be able to read gzip'ed files.

= Performance =

Currently, reading a *single* copyright from the software licenses
screen is slow (~1-2 seconds to read what are tiny (<2k) files).

This seems like an issue that needs work before we can consider reading
.gz files.

What would be rather neat is to augment the existing plain alphabetical
list of software packages with icons denoting the licenses. This would
allow the user to get a quick visual summary without necessarily having
to click on each and every package to see what their particular licences
are.

If implemented, it would make sense to generate a map of "package =>
licenses" at livecd-rootfs build-time. This should be

Bonus points to allow the list to be sorted by licence type :-)

** Affects: livecd-rootfs (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: ubuntu-system-settings (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: livecd-rootfs (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1365008

Title:
  allow about->"software licenses" to read gzip'd files to reclaim some
  more disk space

Status in “livecd-rootfs” package in Ubuntu:
  New
Status in “ubuntu-system-settings” package in Ubuntu:
  New

Bug description:
  /usr/share/doc is stripped down to only the copyright files and yet...

  $ du -sh /usr/share/doc
  19M     /usr/share/doc

  Compressing even just the copyrights gives an appreciable gain:

  $ cp -a /usr/share/doc /tmp/foo
  $ find /tmp/foo/ -type f -exec gzip -9 {} \; && du -sh /tmp/foo
  5.5M    /tmp/foo

  A saving of 13+ Meg!

  However, for this to be useful, the software licenses view would need
  to be able to read gzip'ed files.

  = Performance =

  Currently, reading a *single* copyright from the software licenses
  screen is slow (~1-2 seconds to read what are tiny (<2k) files).

  This seems like an issue that needs work before we can consider
  reading .gz files.

  What would be rather neat is to augment the existing plain
  alphabetical list of software packages with icons denoting the
  licenses. This would allow the user to get a quick visual summary
  without necessarily having to click on each and every package to see
  what their particular licences are.

  If implemented, it would make sense to generate a map of "package =>
  licenses" at livecd-rootfs build-time. This should be

  Bonus points to allow the list to be sorted by licence type :-)

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