Refactor into subroutines.
Signed-off-by: Nicolás Ortega Froysa <nicolas@ortegas.org>
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169
pacundo.pl
169
pacundo.pl
@ -24,6 +24,7 @@
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use strict;
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use warnings;
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use feature qw(signatures);
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use Getopt::Std;
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use File::ReadBackwards;
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@ -31,12 +32,12 @@ use File::ReadBackwards;
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my $VERSION = "1.0";
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my $PROG_NAME = "pacundo";
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sub print_version {
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sub print_version() {
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print("$PROG_NAME v$VERSION\n");
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return;
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}
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sub print_help {
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sub print_help() {
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&print_version();
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print("A time machine to return your ArchLinux machine back to a working state.\n");
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print("\nUSAGE:
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@ -54,6 +55,91 @@ OPTIONS:
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return;
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}
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sub read_txs($num_txs = 1) {
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my $found_txs = 0;
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my $in_tx = 0;
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my @undo_txs;
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my $pacman_log = File::ReadBackwards->new("/var/log/pacman.log") ||
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die("Failed to load pacman log file.\n$!");
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while ($found_txs < $num_txs && defined(my $line = $pacman_log->readline)) {
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unless ($in_tx) {
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# Remeber that we're reading this in reverse order
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if ($line =~ /\[ALPM\] transaction completed/) {
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$in_tx = 1;
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}
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} elsif ($line =~ /\[ALPM\] transaction started/) {
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$found_txs++;
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$in_tx = 0;
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} elsif ($line =~ /\[ALPM\] (upgraded|downgraded)/) {
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my ($action, $pkg_name, $oldver, $newver) =
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$line =~ /\[ALPM\] (upgraded|downgraded) ([^\s]+) \((.*) -> (.*)\)/;
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push(@undo_txs,
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{
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'action' => $action,
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'pkg_name' => $pkg_name,
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'oldver' => $oldver,
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'newver' => $newver,
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}
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);
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} elsif ($line =~ /\[ALPM\] (installed|removed)/) {
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my ($action, $pkg_name) = $line =~ /\[ALPM\] (installed|removed) ([^\s]+)/;
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push(@undo_txs,
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{
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'action' => $action,
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'pkg_name' => $pkg_name,
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}
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);
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}
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}
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return @undo_txs;
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}
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sub select_txs(@undo_txs) {
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print("Last changes:\n");
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my $n = 1;
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foreach my $tx (@undo_txs) {
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format UPGRFORMAT =
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@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @<<<<<<<<<<< -> @<<<<<<<<<<<<<
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$n, $tx->{action}, $tx->{pkg_name}, $tx->{oldver}, $tx->{newver}
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.
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format INSTFORMAT =
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@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
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$n, $tx->{action}, $tx->{pkg_name}
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.
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local $~ = ($tx->{action} =~ /(upgraded|downgraded)/) ? "UPGRFORMAT" : "INSTFORMAT";
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write();
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$n++;
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}
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print("Select transactions to undo (e.g. '1 2 3', '1-3')\n");
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print("> ");
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my @sel = split(' ', <STDIN>);
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foreach my $i (@sel) {
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if ($i =~ /[0-9]+-[0-9]+/) {
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my ($start, $end) = $i =~ /([0-9]+)-([0-9+])/;
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push(@sel, ($start..$end));
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}
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}
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@sel = sort grep({!/[0-9+]-[0-9+]/} @sel);
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my @sel_undo;
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foreach my $i (@sel) {
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push(@sel_undo, $undo_txs[$i-1]);
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}
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return @sel_undo;
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}
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getopts("irt:dvh", \my %opts);
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if ($opts{'v'}) {
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@ -75,82 +161,9 @@ my $r_flag = $opts{'r'} // 0;
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my $dry_run = $opts{'d'} // 0;
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my $num_txs = $opts{'t'} // 1;
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my $pacman_log = File::ReadBackwards->new("/var/log/pacman.log") ||
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die("Failed to load pacman log file.\n$!");
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my $found_txs = 0;
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my $in_tx = 0;
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my @undo_txs;
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while ($found_txs < $num_txs && defined(my $line = $pacman_log->readline)) {
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# Remeber that we're reading this in reverse order
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if (!$in_tx && $line =~ /\[ALPM\] transaction completed/) {
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$in_tx = 1;
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} elsif ($in_tx) {
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if ($line =~ /\[ALPM\] transaction started/) {
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$found_txs++;
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$in_tx = 0;
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} elsif ($line =~ /\[ALPM\] (upgraded|downgraded)/) {
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my ($action, $pkg_name, $oldver, $newver) = $line =~ /\[ALPM\] (upgraded|downgraded) ([^\s]+) \((.*) -> (.*)\)/;
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push(@undo_txs,
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{
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'action' => $action,
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'pkg_name' => $pkg_name,
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'oldver' => $oldver,
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'newver' => $newver,
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}
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);
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} elsif ($line =~ /\[ALPM\] (installed|removed)/) {
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my ($action, $pkg_name) = $line =~ /\[ALPM\] (installed|removed) ([^\s]+)/;
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push(@undo_txs,
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{
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'action' => $action,
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'pkg_name' => $pkg_name,
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}
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);
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}
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}
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}
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my @undo_txs = &read_txs($num_txs);
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# Interactive mode
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if (!$r_flag) {
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print("Last changes:\n");
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my $n = 1;
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foreach my $tx (@undo_txs) {
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format UPGRFORMAT =
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@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @<<<<<<<<<<< -> @<<<<<<<<<<<<<
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$n, $tx->{action}, $tx->{pkg_name}, $tx->{oldver}, $tx->{newver}
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.
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format INSTFORMAT =
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@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
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$n, $tx->{action}, $tx->{pkg_name}
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.
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local $~ = ($tx->{action} =~ /(upgraded|downgraded)/) ? "UPGRFORMAT" : "INSTFORMAT";
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write();
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$n++;
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}
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print("Select transactions to undo (e.g. '1 2 3', '1-3')\n");
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print("> ");
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my @sel = split(' ', <STDIN>);
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foreach my $i (@sel) {
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if ($i =~ /[0-9]-[0-9]/) {
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my ($start, $end) = $i =~ /([0-9])-([0-9])/;
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push(@sel, ($start..$end));
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}
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}
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@sel = sort grep({!/[0-9]-[0-9]/} @sel);
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my @sel_undo;
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foreach my $i (@sel) {
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push(@sel_undo, $undo_txs[$i-1]);
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}
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@undo_txs = @sel_undo;
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unless ($r_flag) {
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@undo_txs = &select_txs(@undo_txs);
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}
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