On Tue, 16 Jan 2018, davidson wrote:
On Sun, 14 Jan 2018, Vasyl Vavrychuk wrote:
Hi, John,
On Sun, Jan 14, 2018 at 8:48 AM, john doe <johndoe65...@mail.com> wrote:
On 1/14/2018 7:28 AM, john doe wrote:
$ dpkg-query -W -f='${db:Status-Abbrev}${binary:Package}\n' awk git gawk
cmake 2>&1 | awk '!/^ii/ || !/^un/{print $6}'
git
gawk
cmake
I also tried to parse stderr, but then I realized that relying on the
output
dpkg-query: no packages found matching
is not correct since it might be localized and is not suitable for
scripting.
You could just discard the stderr, and take the complement of the hits
from dpkg-query, relative to the supplied arguments:
show-installed () {
dpkg-query -W -f='${db:Status-Abbrev}${binary:Package}\n' "$@" |
awk '/^ii/ {print $2}'
}
show-absent () {
universe=("$@")
diff <( IFS=$'\n' ; sort <<<"${universe[*]}" ) \
<( show-installed "${universe[@]}" 2>/dev/null ) |
sed -n 's/^< //p'
}
Further testing shows that the above has a lot of problems.
Would not recommend.
Sorry for the noise.
