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#
# (c) Jan Gehring <jan.gehring@gmail.com>
#
package Rex::Interface::Exec::Base;
use v5.14.4;
use warnings;
use Carp;
use Rex::Helper::Run;
use Rex::Commands::Fs;
use Rex::Interface::Shell;
our $VERSION = '1.16.1'; # VERSION
sub new {
my $that = shift;
my $proto = ref($that) || $that;
my $self = {@_};
bless( $self, $proto );
return $self;
}
sub exec { die("Must be implemented by Interface Class"); }
sub _continuous_read {
my ( $self, $line, $option ) = @_;
my $cb = $option->{continuous_read} || undef;
if ( defined($cb) && ref($cb) eq 'CODE' ) {
&$cb($line);
}
}
sub _end_if_matched {
my ( $self, $line, $option ) = @_;
my $regex = $option->{end_if_matched} || undef;
if ( defined($regex) && ref($regex) eq 'Regexp' && $line =~ m/$regex/ ) {
return 1;
}
return;
}
sub execute_line_based_operation {
my ( $self, $line, $option ) = @_;
$self->_continuous_read( $line, $option );
return $self->_end_if_matched( $line, $option );
}
sub can_run {
my ( $self, $commands_to_check, $check_with_command ) = @_;
$check_with_command ||= "command -v";
my $exec = Rex::Interface::Exec->create;
my $cache = Rex::get_cache();
for my $command ( @{$commands_to_check} ) {
my $cache_key_name = $cache->gen_key_name("can_run.cmd/$command");
if ( $cache->valid($cache_key_name) ) {
return $cache->get($cache_key_name);
}
my @output = Rex::Helper::Run::i_run "$check_with_command $command",
fail_ok => 1;
next if ( $? != 0 );
next if ( !is_file( $output[0] ) );
$cache->set( $cache_key_name, $output[0] );
return $output[0];
}
return undef;
}
sub direct_exec {
my ( $self, $exec, $option ) = @_;
Rex::Commands::profiler()->start("direct_exec: $exec");
my $class_name = ref $self;
Rex::Logger::debug("$class_name/executing: $exec");
my ( $out, $err ) = $self->_exec( $exec, $option );
Rex::Commands::profiler()->end("direct_exec: $exec");
Rex::Logger::debug($out) if ($out);
if ($err) {
Rex::Logger::debug("========= ERR ============");
Rex::Logger::debug($err);
Rex::Logger::debug("========= ERR ============");
}
if (wantarray) { return ( $out, $err ); }
return $out;
}
sub _exec {
my ($self) = @_;
my $class_name = ref $self;
die("_exec method must be overwritten by class ($class_name).");
}
sub shell {
my ($self) = @_;
Rex::Logger::debug("Detecting shell...");
my $cache = Rex::get_cache();
if ( $cache->valid("shell") ) {
Rex::Logger::debug( "Found shell in cache: " . $cache->get("shell") );
return Rex::Interface::Shell->create( $cache->get("shell") );
}
my %shells = Rex::Interface::Shell->get_shell_provider;
for my $shell ( keys %shells ) {
Rex::Logger::debug( "Searching for shell: " . $shell );
$shells{$shell}->require;
if ( $shells{$shell}->detect($self) ) {
Rex::Logger::debug( "Found shell and using: " . $shell );
$cache->set( "shell", $shell );
return Rex::Interface::Shell->create($shell);
}
}
return Rex::Interface::Shell->create("sh");
}
1;
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