josch/mmdebstrap
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enforce dpkg >= 1.20.0 and remove dead code

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Johannes Schauer Marin Rodrigues 2021-10-07 08:12:12 +02:00
parent 4f278deadf
commit 1d2a7ef71a
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 28 additions and 52 deletions
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mmdebstrap
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@ -1550,29 +1550,6 @@ sub setup {
sub run_setup() {
my $options = shift;
my $dpkgversion = version->new(0);
{
my $pid = open my $fh, '-|' // error "failed to fork(): $!";
if ($pid == 0) {
# redirect stderr to /dev/null to hide error messages from dpkg
# versions before 1.20.0
open(STDERR, '>', '/dev/null')
or error "cannot open /dev/null for writing: $!";
exec 'dpkg', '--robot', '--version';
}
chomp(
my $content = do { local $/; <$fh> }
);
close $fh;
# the --robot option was introduced in 1.20.0 but until 1.20.2 the
# output contained a string after the version, separated by a
# whitespace -- since then, it's only the version
if ($? == 0 and $content =~ /^([0-9.]+)( .*)?$/) {
# dpkg is new enough for the --robot option
$dpkgversion = version->new($1);
}
}
{
my @directories = (
'/etc/apt/apt.conf.d', '/etc/apt/sources.list.d',
@ -1584,7 +1561,6 @@ sub run_setup() {
# since we do not know the dpkg version inside the chroot at this
# point, we can only omit it in chrootless mode
if ($options->{mode} ne 'chrootless'
or $dpkgversion < "1.20.0"
or scalar @{ $options->{dpkgopts} } > 0) {
push @directories, '/etc/dpkg/dpkg.cfg.d/';
}
@ -1597,8 +1573,7 @@ sub run_setup() {
push @directories, '/var/log/apt';
# since we do not know the dpkg version inside the chroot at this
# point, we can only omit it in chrootless mode
if ( $options->{mode} ne 'chrootless'
or $dpkgversion < "1.20.0") {
if ($options->{mode} ne 'chrootless') {
push @directories, '/var/lib/dpkg/triggers',
'/var/lib/dpkg/info', '/var/lib/dpkg/alternatives',
'/var/lib/dpkg/updates';
@ -1698,31 +1673,6 @@ sub run_setup() {
close $fh;
}
# /var/lib/dpkg/available is required to exist or otherwise package
# removals will fail
# since we do not know the dpkg version inside the chroot at this point, we
# can only omit it in chrootless mode
# since we want to produce equivalent output independent on the mode, we
# only check for the dpkg version
if ($dpkgversion < "1.20.0") {
open my $fh, '>', "$options->{root}/var/lib/dpkg/available"
or error "failed to open(): $!";
close $fh;
}
# /var/lib/dpkg/cmethopt is used by dselect
# see #930788
# since we do not know the dpkg version inside the chroot at this point, we
# can only omit it in chrootless mode
# since we want to produce equivalent output independent on the mode, we
# only check for the dpkg version
if ($dpkgversion < "1.20.0") {
open my $fh, '>', "$options->{root}/var/lib/dpkg/cmethopt"
or error "failed to open(): $!";
print $fh "apt apt\n";
close $fh;
}
# we create /var/lib/dpkg/arch inside the chroot either if there is more
# than the native architecture in the chroot or if chrootless mode is
# used to create a chroot of a different architecture than the native
@ -4531,6 +4481,32 @@ sub main() {
}
}
{
my $dpkgversion = version->new(0);
my $pid = open my $fh, '-|' // error "failed to fork(): $!";
if ($pid == 0) {
# redirect stderr to /dev/null to hide error messages from dpkg
# versions before 1.20.0
open(STDERR, '>', '/dev/null')
or error "cannot open /dev/null for writing: $!";
exec 'dpkg', '--robot', '--version';
}
chomp(
my $content = do { local $/; <$fh> }
);
close $fh;
# the --robot option was introduced in 1.20.0 but until 1.20.2 the
# output contained a string after the version, separated by a
# whitespace -- since then, it's only the version
if ($? == 0 and $content =~ /^([0-9.]+)( .*)?$/) {
# dpkg is new enough for the --robot option
$dpkgversion = version->new($1);
}
if ($dpkgversion < "1.20.0") {
error "need dpkg >= 1.20.0 but have $dpkgversion";
}
}
{
my $aptversion = version->new(0);
my $pid = open my $fh, '-|', 'apt-get',