Implement package management commands.

Signed-off-by: Nicolás Ortega Froysa <nicolas@ortegas.org>

pacundo.pl

@@ -141,25 +141,46 @@ $n, $tx->{action}, $tx->{pkg_name}
 sub get_pkgmgr() {
 	# TODO: autodetect AUR helper
 	my $mgr = $ENV{DEFAULT_PKGMGR} // 'pacman';
-	my $mgr_bin = `which $mgr 2>&1`;
+	my $sudo = '';
+	my $user = $ENV{LOGNAME} || $ENV{USER};
 
+	my $mgr_bin = `which $mgr 2>&1`;
 	if ($? != 0) {
 		print(STDERR "Failed to find pacman executable. Are you using an ArchLinux system?\n");
 		exit 1;
 	}
+	chomp($mgr_bin);
+
+	if ($mgr eq 'pacman' && $user ne 'root') {
+		$sudo = 'sudo';
+	}
 
 	my %pkgmgr = (
 		name           => $mgr,
 		bin            => $mgr_bin,
-		search         => "$mgr_bin -Ss",
-		install_remote => "$mgr_bin -S",
-		install_local  => "$mgr_bin -U",
-		remove         => "$mgr_bin -R",
+		search         => "$sudo $mgr_bin -Ss",
+		install_remote => "$sudo $mgr_bin -S",
+		install_local  => "$sudo $mgr_bin -U",
+		remove         => "$sudo $mgr_bin -R",
 	);
 
 	return \%pkgmgr;
 }
 
+sub find_local_pkg($pkgmgr, $pkg_name, $pkg_ver) {
+	my $pkg_file = '';
+	my $aur_dir = "$ENV{'XDG_CACHE_HOME'}/yay/$pkg_name";
+
+	if ($pkgmgr->{name} eq 'yay' && -d $aur_dir) {
+		$pkg_file = `ls $aur_dir/$pkg_name-$pkg_ver-*.pkg.tar.zst | tail -n1`;
+	} else {
+		$pkg_file = `ls /var/cache/pacman/pkg/$pkg_name-$pkg_ver-*.pkg.tar.zst | tail -n1`;
+	}
+
+	chomp($pkg_file);
+	return $pkg_file;
+}
+
 getopts("irt:dvh", \my %opts);
 
 if ($opts{'v'}) {
@@ -186,3 +207,27 @@ my @undo_txs = &read_txs($num_txs);
 
 # Interactive mode
 @undo_txs = &select_txs(@undo_txs) unless ($r_flag);
+
+my $remove_pkgs = "";          # executed via -R
+my $remote_install_pkgs = "";  # executed via -S
+my $local_install_pkgs = "";   # executed via -U
+
+foreach my $tx (@undo_txs) {
+	if ($tx->{action} eq 'installed') {
+		$remove_pkgs .= "$tx->{pkg_name} ";
+	} elsif ($tx->{action} eq 'removed') {
+		# TODO: install local package if available
+		$remote_install_pkgs .= "$tx->{pkg_name} ";
+	} else {
+		my $pkg_file = &find_local_pkg($pkgmgr, $tx->{pkg_name}, $tx->{oldver});
+		if ($pkg_file eq '') {
+			$remote_install_pkgs .= "$tx->{pkg_name} ";
+		} else {
+			$local_install_pkgs .= "$pkg_file ";
+		}
+	}
+}
+
+system("$pkgmgr->{remove} $remove_pkgs") if ($remove_pkgs ne '');
+system("$pkgmgr->{install_remote} $remote_install_pkgs") if ($remote_install_pkgs ne '');
+system("$pkgmgr->{install_local} $local_install_pkgs") if ($local_install_pkgs ne '');