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package ShellSequence;
use strict;
use warnings;
use Capture::Tiny 'tee_stdout';
use Array::Iterator;
use Term::UI;
use Term::ReadLine;
use ScriptStatus;
sub new {
my $class = shift;
my $self = {
'commands' => []
};
bless $self, $class;
return $self;
}
# the advantage of using the add_ functions and queuing up commands is
# that the user will be informed what the next command will be, which
# helps them decide whether to give up and skip the command (e.g.: `mr
# autoci` is failing, and `mr push` will be next)
sub add_should_zero {
my $self = shift;
my @args = @_;
my $cmd = ['ZERO', @args];
push @{$self->{'commands'}}, $cmd;
}
sub add_should_succeed {
my $self = shift;
my @args = @_;
my $cmd = ['SUCCEED', @args];
push @{$self->{'commands'}}, $cmd;
}
sub should_zero {
my $self = shift;
my @args = @_;
$self->add_should_zero(@args);
$self->run();
}
sub should_succeed {
my $self = shift;
my @args = @_;
$self->add_should_succeed(@args);
$self->run();
}
sub choice {
my $i = shift @_;
my @args = @_;
my $term = Term::ReadLine->new('brand');
my $shell = $term->ask_yn(
prompt => 'Spawn a shell to investigate?',
default => 'n',
);
if ($shell) {
status "I will try running `@args' again when this shell exits";
system $ENV{'SHELL'};
return 1;
} else {
if ($i->peek()) {
my @maybe_next = @{$i->peek()};
shift @maybe_next;
my @next = @maybe_next;
status "info: if you skip, the next command will be `@next'";
}
my $give_up = $term->ask_yn(
prompt => 'Give up and skip this command?',
default => 'n',
);
return !$give_up;
}
}
sub run {
my $self = shift;
my $i = Array::Iterator->new($self->{'commands'});
while ( my $cmd = $i->get_next() ) {
my $require = shift @$cmd;
my @args = @$cmd;
# previously we always used tee_stdout, and then looked at
# both $output and its exit code. However, tee_stdout works
# badly for ncurses, such as debconf prompts which appeared
# during apt runs. So don't use tee_stdout except when we
# have to
while (42) {
status "running `@args'";
if ($require eq 'SUCCEED') {
system @args;
my $exit = $? >> 8;
if ($exit != 0) {
status "`@args' failed but it was required to succeed";
choice($i, @args) || last;
} else {
last;
}
} else {
(my $output, undef) = tee_stdout {
system @args;
};
if (length($output)) {
status "`@args' was required to produce no output";
choice($i, @args) || last;
} else {
last;
}
}
}
}
$self->{'commands'} = [];
}
1;
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