Bump version to v1.1

No longer exists.

.gitignore

@@ -1,2 +1 @@
-pacundo
 pacundo.1.gz

Makefile

@@ -20,20 +20,26 @@
 # 3. This notice may not be removed or altered from any source
 #    distribution.
 
-PREFIX=/usr/local
-
-pacundo: pacundo.pl
-	pp -o $@ $^
+ifeq ($(PREFIX),)
+	PREFIX := /usr/local
+endif
 
 pacundo.1.gz: pacundo.1
 	gzip -c $^ > $@
 
-.PHONY: install clean
+.PHONY: clean doc install uninstall
 
 clean:
-	$(RM) pacundo
 	$(RM) pacundo.1.gz
 
-install: pacundo pacundo.1.gz
-	install -m 755 pacundo $(PREFIX)/bin/
+doc: pacundo.1.gz
+
+install: pacundo.1.gz
+	install -d $(PREFIX)/bin
+	install -m 755 pacundo.pl $(PREFIX)/bin/pacundo
+	install -d $(PREFIX)/share/man/man1
 	install -m 644 pacundo.1.gz $(PREFIX)/share/man/man1/
+
+uninstall:
+	$(RM) $(PREFIX)/bin/pacundo
+	$(RM) $(PREFIX)/share/man/man1/pacundo.1.gz

README.md

@@ -11,13 +11,13 @@ to boot from a USB depending on just how broken it is).
 
 - Perl 5
 - `File::ReadBackwards` module
-- PAR Packager (for compiling)
-- GNU Makefile
+- cURL
+- GNU Make
 
 You can install these packages with the following command:
 
 ```console
-# pacman -S perl perl-file-readbackwards perl-par-packer
+# pacman -S perl perl-file-readbackwards curl
 ```
 
 ### Compiling & Installing
@@ -45,6 +45,30 @@ There are two modes for undoing pacman transactions:
 
 Look at the man-page (`man pacundo`) for more information.
 
+### Supported AUR Helpers
+
+- [yay](https://github.com/Jguer/yay)
+
+## Contributing
+
+If you find any issues, feel free to report them on GitHub or send me an E-Mail
+(see my website/profile for the address). I will add these issues to my personal
+Gitea page and (unless specified otherwise) mention you as the person who found
+the issue.
+
+For patches/pull requests, if you open a PR on GitHub I will likely not merge
+directly but instead apply the patches locally (via Git patches, conserving
+authorship), push them to my Gitea repository, which will finally be mirrored to
+GitHub. However, you can save me a bit of work by just sending me the Git
+patches directly (via E-Mail).
+
+If you're looking for a way to contribute, there are a few to-do items within
+the code which you can find using `grep`:
+
+```console
+# grep -n "TODO" pacundo.pl
+```
+
 ## License
 
 This project is licensed under the terms & conditions of the Zlib license.

pacundo.1

@@ -1,6 +1,6 @@
-.TH PACUNDO "1" "April 2024" "pacundo 1.0" "User Commands"
+.TH PACUNDO "1" "April 2024" "pacundo 1.1" "User Commands"
 .SH "NAME"
-pacundo - A time machine to return your ArchLinux machine back to a working state.
+pacundo - A time machine to roll back your ArchLinux machine to a working state.
 .SH "SYNOPSIS"
 .B pacundo
 [\fI\-i\fR|\fI\-r\fR] [\fI\-t\fR <\fInum\fR>] [\fI\-d\fR]
@@ -21,19 +21,22 @@ is especially helpful if the last update broke your system for some reason.
 .SH "OPTIONS"
 .TP
 \fB\-i\fR
-Interactively select the transactions to undo (default behavior)
+Enter interactive mode to select package operations to undo (default behavior)
 .TP
 \fB\-r\fR
-Non-interactively undo transactions
+Non-interactively undo entire transactions
 .TP
 \fB\-t\fR <\fInum\fR>
-Select number of transactions to include (default: 1)
+Specify the number of transactions to include (default: 1)
+.TP
+\fB\-d\fR
+Dry run, i.e. don't actually do anything
 .TP
 \fB\-h\fR
-Show help information
+Show this help information
 .TP
 \fB\-v\fR
-Show program version
+Print program version
 
 .SH "AUTHOR"
 Written by Nicolás A. Ortega Froysa.

pacundo.pl

@@ -29,7 +29,7 @@ use feature qw(signatures);
 use Getopt::Std;
 use File::ReadBackwards;
 
-my $VERSION   = '1.0';
+my $VERSION   = '1.1';
 my $PROG_NAME = 'pacundo';
 
 sub print_version() {
@@ -39,7 +39,7 @@ sub print_version() {
 
 sub print_help() {
 	&print_version();
-	print("A time machine to return your ArchLinux machine back to a working state.
+	print("A time machine to roll back your ArchLinux machine to a working state.
 
 USAGE:
 	$PROG_NAME [-i|-r] [-t <num>] [-d]
@@ -47,9 +47,9 @@ USAGE:
 	$PROG_NAME -v
 
 OPTIONS:
-	-i         Enter interactive mode to select packages to downgrade [default behavior]
-	-r         Automatically downgrade all packages from last upgrade
-	-t <num>   Specify the number of transactions to include for undoing selection [default 1]
+	-i         Enter interactive mode to select package operations to undo (default behavior)
+	-r         Non-interactively undo entire transactions
+	-t <num>   Specify the number of transactions to include (default: 1)
 	-d         Dry run, i.e. don't actually do anything
 	-h         Show this help information
 	-v         Print program version\n");
@@ -169,7 +169,8 @@ sub get_pkgmgr() {
 	my %pkgmgr = (
 		name           => $mgr,
 		bin            => $mgr_bin,
-		search         => "$sudo $mgr_bin -Ss",
+		search         => "$mgr_bin -Ss",
+		info           => "$mgr_bin -Si",
 		install_remote => "$sudo $mgr_bin -S",
 		install_local  => "$sudo $mgr_bin -U",
 		remove         => "$sudo $mgr_bin -R",
@@ -178,17 +179,72 @@ sub get_pkgmgr() {
 	return \%pkgmgr;
 }
 
-sub find_local_pkg($pkgmgr, $pkg_name, $pkg_ver) {
+sub find_local_pkg($pkgmgr, $pkg_name, $pkg_ver='') {
 	my $pkg_file = '';
-	my $aur_dir = "$ENV{'XDG_CACHE_HOME'}/yay/$pkg_name";
+	my $pkg_pat;
+	my $repo = `$pkgmgr->{info} $pkg_name | awk '{ if (\$1 == "Repository") print \$3; }'`;;
+	chomp($repo);
 
-	if ($pkgmgr->{name} eq 'yay' && -d $aur_dir) {
-		$pkg_file = `ls $aur_dir/$pkg_name-$pkg_ver-*.pkg.tar.zst | tail -n1`;
+	if ($pkg_ver ne '') {
+		$pkg_pat = "$pkg_name-$pkg_ver-*.pkg.tar.zst";
 	} else {
-		$pkg_file = `ls /var/cache/pacman/pkg/$pkg_name-$pkg_ver-*.pkg.tar.zst | tail -n1`;
+		$pkg_pat = "$pkg_name-*.pkg.tar.zst";
+	}
+
+	if ($repo eq 'aur') {
+		my $aur_dir;
+
+		if ($pkgmgr->{name} eq 'yay') {
+			$aur_dir = "$ENV{'XDG_CACHE_HOME'}/yay/$pkg_name";
+		} else {
+			return '';
+		}
+
+		$pkg_file = `ls $aur_dir/$pkg_pat 2> /dev/null | tail -n1`;
+	} else {
+		$pkg_file = `ls /var/cache/pacman/pkg/$pkg_pat 2> /dev/null | tail -n1`;
 	}
 
 	chomp($pkg_file);
+
+	return $pkg_file;
+}
+
+sub find_remote_archive($pkgmgr, $pkg_name, $pkg_ver) {
+	my $repo = `$pkgmgr->{info} $pkg_name | awk '{ if (\$1 == "Repository") print \$3; }'`;;
+	chomp($repo);
+	# TODO: look through git history for version.
+	if ($repo eq 'aur') {
+		return '';
+	}
+
+	# TODO: Probably a better way of managing architectures. There should be a
+	# way of getting the architecture of the package.
+	my @archs = (`uname -m`, 'any');
+	my $ala_url = "https://archive.archlinux.org/packages/" .
+		substr($pkg_name,0,1) . "/" . $pkg_name;
+	my $pkg_file = '';
+
+	foreach my $arch (@archs) {
+		chomp($arch);
+		my $filename = "$pkg_name-$pkg_ver-$arch.pkg.tar.zst";
+		my $pkg_url = "$ala_url/$filename";
+		my $output_file = "/tmp/$filename";
+
+		my $resp = `curl -Lo $output_file -s -w '%{http_code}\n' $pkg_url`;
+		chomp($resp);
+		if ($resp eq '200') {
+			system("curl -Lo $output_file.sig -s $pkg_url.sig");
+			$pkg_file = $output_file;
+			last;
+		} else {
+			unlink $output_file;
+		}
+	}
+
+	if ($pkg_file ne '') {
+		print("Downloaded from archive: $pkg_file\n");
+	}
 	return $pkg_file;
 }
 
@@ -227,18 +283,30 @@ 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});
+		my $pkg_file = &find_local_pkg($pkgmgr, $tx->{pkg_name});
 		if ($pkg_file eq '') {
 			$remote_install_pkgs .= "$tx->{pkg_name} ";
 		} else {
 			$local_install_pkgs .= "$pkg_file ";
 		}
+	} else {
+		my $pkg_file = &find_local_pkg($pkgmgr, $tx->{pkg_name}, $tx->{oldver});
+		$pkg_file = &find_remote_archive($pkgmgr, $tx->{pkg_name}, $tx->{oldver}) if ($pkg_file eq '');
+
+		if ($pkg_file ne '') {
+			$local_install_pkgs .= "$pkg_file ";
+		} else {
+			print(STDERR "Unable to find $tx->{pkg_name} $tx->{pkg_ver}");
+		}
 	}
 }
 
-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 '');
+if ($dry_run) {
+	print("$pkgmgr->{remove} $remove_pkgs\n") if ($remove_pkgs ne '');
+	print("$pkgmgr->{install_remote} $remote_install_pkgs\n") if ($remote_install_pkgs ne '');
+	print("$pkgmgr->{install_local} $local_install_pkgs\n") if ($local_install_pkgs ne '');
+} else {
+	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 '');
+}