nortega/pacundo
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Refactor into subroutines.

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Signed-off-by: Nicolás Ortega Froysa <nicolas@ortegas.org>
This commit is contained in:
Nicolás A. Ortega Froysa 2024-03-09 16:47:25 +01:00
parent e9eec6cfcc
commit 4cb213d585
1 changed files with 91 additions and 78 deletions
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169
pacundo.pl
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@ -24,6 +24,7 @@
use strict; use strict;
use warnings; use warnings;
use feature qw(signatures);
use Getopt::Std; use Getopt::Std;
use File::ReadBackwards; use File::ReadBackwards;
@ -31,12 +32,12 @@ use File::ReadBackwards;
my $VERSION = "1.0"; my $VERSION = "1.0";
my $PROG_NAME = "pacundo"; my $PROG_NAME = "pacundo";
sub print_version { sub print_version() {
print("$PROG_NAME v$VERSION\n"); print("$PROG_NAME v$VERSION\n");
return; return;
} }
sub print_help { sub print_help() {
&print_version(); &print_version();
print("A time machine to return your ArchLinux machine back to a working state.\n"); print("A time machine to return your ArchLinux machine back to a working state.\n");
print("\nUSAGE: print("\nUSAGE:
@ -54,6 +55,91 @@ OPTIONS:
return; return;
} }
sub read_txs($num_txs = 1) {
my $found_txs = 0;
my $in_tx = 0;
my @undo_txs;
my $pacman_log = File::ReadBackwards->new("/var/log/pacman.log") ||
die("Failed to load pacman log file.\n$!");
while ($found_txs < $num_txs && defined(my $line = $pacman_log->readline)) {
unless ($in_tx) {
# Remeber that we're reading this in reverse order
if ($line =~ /\[ALPM\] transaction completed/) {
$in_tx = 1;
}
} elsif ($line =~ /\[ALPM\] transaction started/) {
$found_txs++;
$in_tx = 0;
} elsif ($line =~ /\[ALPM\] (upgraded|downgraded)/) {
my ($action, $pkg_name, $oldver, $newver) =
$line =~ /\[ALPM\] (upgraded|downgraded) ([^\s]+) \((.*) -> (.*)\)/;
push(@undo_txs,
{
'action' => $action,
'pkg_name' => $pkg_name,
'oldver' => $oldver,
'newver' => $newver,
}
);
} elsif ($line =~ /\[ALPM\] (installed|removed)/) {
my ($action, $pkg_name) = $line =~ /\[ALPM\] (installed|removed) ([^\s]+)/;
push(@undo_txs,
{
'action' => $action,
'pkg_name' => $pkg_name,
}
);
}
}
return @undo_txs;
}
sub select_txs(@undo_txs) {
print("Last changes:\n");
my $n = 1;
foreach my $tx (@undo_txs) {
format UPGRFORMAT =
@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @<<<<<<<<<<< -> @<<<<<<<<<<<<<
$n, $tx->{action}, $tx->{pkg_name}, $tx->{oldver}, $tx->{newver}
.
format INSTFORMAT =
@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$n, $tx->{action}, $tx->{pkg_name}
.
local $~ = ($tx->{action} =~ /(upgraded|downgraded)/) ? "UPGRFORMAT" : "INSTFORMAT";
write();
$n++;
}
print("Select transactions to undo (e.g. '1 2 3', '1-3')\n");
print("> ");
my @sel = split(' ', <STDIN>);
foreach my $i (@sel) {
if ($i =~ /[0-9]+-[0-9]+/) {
my ($start, $end) = $i =~ /([0-9]+)-([0-9+])/;
push(@sel, ($start..$end));
}
}
@sel = sort grep({!/[0-9+]-[0-9+]/} @sel);
my @sel_undo;
foreach my $i (@sel) {
push(@sel_undo, $undo_txs[$i-1]);
}
return @sel_undo;
}
getopts("irt:dvh", \my %opts); getopts("irt:dvh", \my %opts);
if ($opts{'v'}) { if ($opts{'v'}) {
@ -75,82 +161,9 @@ my $r_flag = $opts{'r'} // 0;
my $dry_run = $opts{'d'} // 0; my $dry_run = $opts{'d'} // 0;
my $num_txs = $opts{'t'} // 1; my $num_txs = $opts{'t'} // 1;
my $pacman_log = File::ReadBackwards->new("/var/log/pacman.log") || my @undo_txs = &read_txs($num_txs);
die("Failed to load pacman log file.\n$!");
my $found_txs = 0;
my $in_tx = 0;
my @undo_txs;
while ($found_txs < $num_txs && defined(my $line = $pacman_log->readline)) {
# Remeber that we're reading this in reverse order
if (!$in_tx && $line =~ /\[ALPM\] transaction completed/) {
$in_tx = 1;
} elsif ($in_tx) {
if ($line =~ /\[ALPM\] transaction started/) {
$found_txs++;
$in_tx = 0;
} elsif ($line =~ /\[ALPM\] (upgraded|downgraded)/) {
my ($action, $pkg_name, $oldver, $newver) = $line =~ /\[ALPM\] (upgraded|downgraded) ([^\s]+) \((.*) -> (.*)\)/;
push(@undo_txs,
{
'action' => $action,
'pkg_name' => $pkg_name,
'oldver' => $oldver,
'newver' => $newver,
}
);
} elsif ($line =~ /\[ALPM\] (installed|removed)/) {
my ($action, $pkg_name) = $line =~ /\[ALPM\] (installed|removed) ([^\s]+)/;
push(@undo_txs,
{
'action' => $action,
'pkg_name' => $pkg_name,
}
);
}
}
}
# Interactive mode # Interactive mode
if (!$r_flag) { unless ($r_flag) {
print("Last changes:\n"); @undo_txs = &select_txs(@undo_txs);
my $n = 1;
foreach my $tx (@undo_txs) {
format UPGRFORMAT =
@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @<<<<<<<<<<< -> @<<<<<<<<<<<<<
$n, $tx->{action}, $tx->{pkg_name}, $tx->{oldver}, $tx->{newver}
.
format INSTFORMAT =
@|| @<< @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$n, $tx->{action}, $tx->{pkg_name}
.
local $~ = ($tx->{action} =~ /(upgraded|downgraded)/) ? "UPGRFORMAT" : "INSTFORMAT";
write();
$n++;
}
print("Select transactions to undo (e.g. '1 2 3', '1-3')\n");
print("> ");
my @sel = split(' ', <STDIN>);
foreach my $i (@sel) {
if ($i =~ /[0-9]-[0-9]/) {
my ($start, $end) = $i =~ /([0-9])-([0-9])/;
push(@sel, ($start..$end));
}
}
@sel = sort grep({!/[0-9]-[0-9]/} @sel);
my @sel_undo;
foreach my $i (@sel) {
push(@sel_undo, $undo_txs[$i-1]);
}
@undo_txs = @sel_undo;
} }