https://github.com/afbjorklund/debfile

dlocate query file cache
https://github.com/afbjorklund/debfile

debian dpkg

Last synced: about 2 months ago
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dlocate query file cache

• Host: GitHub
• URL: https://github.com/afbjorklund/debfile
• Owner: afbjorklund
• License: gpl-2.0
• Created: 2024-03-21T21:55:40.000Z (10 months ago)
• Default Branch: main
• Last Pushed: 2024-06-03T10:01:04.000Z (8 months ago)
• Last Synced: 2024-10-14T17:44:57.632Z (3 months ago)
• Topics: debian, dpkg
• Language: Perl
• Homepage:
• Size: 23.4 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# debfile

Returns which deb package owns a particular file, and its version too.

Similar to `dpkg -S` and `dpkg-query -W`, but much faster (uses [dlocate](https://github.com/afbjorklund/dlocate)).

The deb equivalent of running `rpm -qf`.

Remember to run `sudo update-dlocatedb`.

## zstd

The default dlocatedb takes a lot of disk space, when not compressed...

But compressing it with gzip, makes dlocate run much slower (like 10x)

Use zstd instead, see: dlocate-zstd.diff

Still compresses 10x, but runs 10x faster

## grep

For reasons why dlocate is using text files and `grep`, instead of `locate`:

The debfile "database" maps from paths to packages, and packages to versions.

But since it doesn't use regular expressions, it can be converted into a dbm.

## text

For debugging purposes or other experiments, you can make it output text:

`DEBFILE_TEXT=1 ./convertdb.pl > debfiledb`

The format is actually YAML, and can be converted to e.g. JSON using `yq`.

Or one can use grep instead of gdbm, just like with the dlocate database.

## cron

The dlocatedb is normally updated from `/etc/cron.daily/dlocate`

You can update the debfile.db as well, from the same daily job.

Something like this: dlocate-debfile.diff

Or run `sudo /usr/share/dlocate/convertdb`.