diff --git a/mmdebstrap b/mmdebstrap index 1230ff4..9e62300 100755 --- a/mmdebstrap +++ b/mmdebstrap @@ -34,7 +34,8 @@ use File::Temp qw(tempfile tempdir); use File::Basename; use File::Find; use Cwd qw(abs_path getcwd); -require "syscall.ph"; ## no critic (Modules::RequireBarewordIncludes) +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; } + 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 <= $len_status) { + return; + } + # \e[2K clears everything on the current line (i.e. the progress bar) + print STDERR "\e[2K"; if ($perc eq "done") { - # \e[2K clears everything on the current line (i.e. the progress bar) - print STDERR "\e[2Kdone\n"; + 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";