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#!/usr/bin/env bash
_os=''
detect_os() {
command -v uname > /dev/null \
&& [ "$( uname -o )" == 'Cygwin' ] \
&& _os='Cygwin' \
&& return 0
[ -r /etc/os-release ] \
&& _os="$( . /etc/os-release && echo "$NAME" )" \
&& return 0
return 1
}
detect_os
os_detected() {
test -n "$_os"
}
is_cygwin() {
test "$_os" == 'Cygwin'
}
is_ubuntu() {
test "$_os" == 'Ubuntu'
}
list_manually_installed_packages_ubuntu() (
set -o errexit -o nounset -o pipefail
comm -23 <( apt-mark showmanual | sort | uniq ) \
<( gzip --decompress --stdout -- /var/log/installer/initial-status.gz | sed --quiet 's/^Package: //p' | sort | uniq )
)
list_packages_cygwin() (
set -o errexit -o nounset -o pipefail
cygcheck --check-setup --dump-only \
| tail -n +3 \
| cut -d ' ' -f 1
)
list_packages_ubuntu() (
set -o errexit -o nounset -o pipefail
dpkg --get-selections \
| grep --invert-match -- 'deinstall$' \
| cut -f 1 \
| cut -d ':' -f 1
)
list_packages() (
set -o errexit -o nounset -o pipefail
if is_cygwin; then
list_packages_cygwin
elif is_ubuntu; then
list_packages_ubuntu
fi
return 1
)
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