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PT-2015 Fix pt-config-diff not sorting flags

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Previously, flags would be compared in the exact order they are output
by MySQL, which can result in false negatives if the input ordering does
not match.

Example from the ticket:

```
[root@avvr-dbm51 ~]# pt-config-diff /etc/my.cnf h=localhost,P=3047
1 config difference
Variable                  /etc/my.cnf  avvr-dbm51
========================= ============ ============
myisam_recover_options    FORCE,BACKUP BACKUP,FORCE
```

This commit fixes the issue by sorting the flags before comparison to
ensure that any ordering differences will not report a diff.

Co-authored-by: Jonathan Gnagy <jonathan@therubyist.org>
This commit is contained in:
Hartley McGuire
2025-08-27 16:06:49 +00:00
parent bca6c5bee8
commit 47f7638d60
3 changed files with 32 additions and 0 deletions
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4
lib/MySQLConfigComparer.pm
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@@ -295,6 +295,10 @@ sub _normalize_value {
$val = defined $val ? $val : '';
$val = $alt_val_for{$val} if exists $alt_val_for{$val};
if ( $val =~ m/,/ && !$is_dir && !$base_path) {
$val = join(',', sort(split(',', $val)));
}
if ( $val ) {
if ( $is_dir ) {
$val .= '/' unless $val =~ m/\/$/;