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Accepted
Sybil
Asked: 2020-09-29 00:43:32 +0800 CST

How to list all proprietary (license field) snap packages installed on my box?

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After a snap has been installed with sudo snap install [package] how can I list all packages on my box which have a proprietary license? For deciding what is Open Source and what not I like Debian Free Software Guidelines.

For example spotify

Details for Spotify
License
    Proprietary
license snap

1 Answers

  1. Best Answer

    To get all snap packages:

    snap list

    To get details (including the license):

    snap info <package name>

    So something as

    for p in $(snap list | awk 'NR > 1 { print $1 }') ; do
    snap info $p | grep license
done

    would list the license for each snap, and then you could filter that at will. Now, the parameter license in the few snaps I have is unset. Except for snapd, which has GPL-3.0, versus GPL-3.0+ shown here.

    So, apparently, to get the actual license for each snap you would have to write a script that retrieves the info from https://snapcraft.io/<package name>, or, better, from snap info <package name> | grep store-url (likely the same in all cases, but I would not bet on it). Not a big deal, but not expected either probably.

    Adding a script as commented by @Xosrov

    #!/usr/bin/env bash

for i in $(snap list | awk 'NR > 1 {print $1}') ; do
  url="https://snapcraft.io/${i}"
  echo "${url}"
  site=$(curl -s "${url}")
  for j in $site ; do
    res=$(echo "$j" | awk -F'>' '$0~"data-live=\"license"{print $2}')
    if [ -n "$res" ] ; then
      echo "License for ${i}: ${res:0:$((${#string}-4))}"
      break
    fi
  done
done
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