josch/mmdebstrap
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only print progress bars on interactive terminals that are wide enough

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This commit is contained in:
Johannes Schauer Marin Rodrigues 2022-10-16 22:03:06 +02:00
parent 0903b3f6a7
commit 4048293be5
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 80 additions and 20 deletions
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mmdebstrap
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@ -35,6 +35,7 @@ use File::Basename;
use File::Find;
use Cwd qw(abs_path getcwd);
require "syscall.ph"; ## no critic (Modules::RequireBarewordIncludes)
require "sys/ioctl.ph"; ## no critic (Modules::RequireBarewordIncludes)
use Fcntl qw(S_IFCHR S_IFBLK FD_CLOEXEC F_GETFD F_SETFD);
use List::Util qw(any none);
use POSIX
@ -694,30 +695,87 @@ sub havemknod {
return $havemknod;
}
# inspired by /usr/share/perl/5.34/pod/perlfaq8.pod
sub terminal_width {
if (!stderr_is_tty()) {
return -1;
}
if (!defined &TIOCGWINSZ) {
return -1;
}
if (!-e "/dev/tty") {
return -1;
}
my $tty_fh;
if (!open($tty_fh, "+<", "/dev/tty")) {
return -1;
}
my $winsize = '';
if (!ioctl($tty_fh, &TIOCGWINSZ, $winsize)) {
return -1;
}
my (undef, $col, undef, undef) = unpack('S4', $winsize);
return $col;
}
# Prints the current status, the percentage and a progress bar on STDERR if
# it is an interactive tty and if verbosity is set to 1.
#
# * first 12 chars: status
# * following 7 chars: percentage
# * progress bar until 79 chars are filled
sub print_progress {
if ($verbosity_level != 1) {
return;
}
my $perc = shift;
if (!stderr_is_tty()) {
return;
}
if ($perc eq "done") {
my $perc = shift;
my $status = shift;
my $len_status = 12;
my $len_perc = 7;
my $len_prog_min = 10;
my $len_prog_max = 60;
my $twidth = terminal_width();
if ($twidth <= $len_status) {
return;
}
# \e[2K clears everything on the current line (i.e. the progress bar)
print STDERR "\e[2Kdone\n";
print STDERR "\e[2K";
if ($perc eq "done") {
print STDERR "done\n";
return;
}
if (defined $status) {
printf STDERR "%*s", -$len_status, "$status:";
} else {
print STDERR (" " x $len_status);
}
if ($twidth <= $len_status + $len_perc) {
print STDERR "\r";
return;
}
if ($perc >= 100) {
$perc = 100;
}
my $width = 50;
my $num_x = int($perc * $width / 100);
my $bar = '=' x $num_x;
if ($num_x != $width) {
$bar .= '>';
$bar .= ' ' x ($width - $num_x - 1);
printf STDERR "%*.2f", $len_perc, $perc;
if ($twidth <= $len_status + $len_perc + $len_prog_min) {
print STDERR "\r";
return;
}
printf STDERR "%6.2f [%s]\r", $perc, $bar;
my $len_prog = $twidth - $len_perc - $len_status;
if ($len_prog > $len_prog_max) {
$len_prog = $len_prog_max;
}
my $num_x = int($perc * ($len_prog - 3) / 100);
my $bar = '=' x $num_x;
if ($num_x != ($len_prog - 3)) {
$bar .= '>';
$bar .= ' ' x ($len_prog - $num_x - 4);
}
print STDERR " [$bar]\r";
return;
}
@ -787,6 +845,15 @@ sub run_progress {
POSIX::sigprocmask(SIG_UNBLOCK, $sigset)
or error "Can't unblock signals: $!";
if ($verbosity_level != 1 || !stderr_is_tty()) {
# no need to print any progress
# we still need to consume everything from $rfh or otherwise apt
# will block forever if there is too much output
local $/;
<$rfh>;
close $rfh;
exit 0;
}
my $progress = 0.0;
my $status = undef;
print_progress($progress);
@ -801,14 +868,7 @@ sub run_progress {
if (defined $newstatus) {
$status = $newstatus;
}
if ( defined $status
and $verbosity_level == 1
and stderr_is_tty()) {
# \e[2K clears everything on the current line (i.e. the
# progress bar)
print STDERR "\e[2K$status: ";
}
print_progress($newprogress);
print_progress($newprogress, $status);
$progress = $newprogress;
}
print_progress("done");
@ -2424,7 +2484,7 @@ sub run_extract() {
}
waitpid($pid3, 0);
$? == 0 or error "tar --extract failed: $?";
print_progress($counter / $total * 100);
print_progress($counter / $total * 100, "extracting");
}
print_progress "done";