use File::Path;
use File::Basename;
+use File::Find;
use Getopt::Long qw(:config no_getopt_compat);
use Mail::Header;
use Mail::Box::Maildir;
$xdg_cache_dir = $ENV{XDG_CACHE_HOME} if $ENV{XDG_CACHE_HOME};
my $cache_dir = "$xdg_cache_dir/notmuch/mutt";
+sub die_dir($$) {
+ my ($maildir, $error) = @_;
+ die "notmuch-mutt: search cache maildir $maildir $error\n".
+ "Please ensure that the notmuch-mutt search cache Maildir\n".
+ "contains no subfolders or real mail data, only symlinks to mail\n";
+}
+
+sub die_subdir($$$) {
+ my ($maildir, $subdir, $error) = @_;
+ die_dir($maildir, "subdir $subdir $error");
+}
+
+# check that the search cache maildir is that and not a real maildir
+# otherwise there could be data loss when the search cache is emptied
+sub check_search_cache_maildir($) {
+ my ($maildir) = (@_);
+
+ return unless -e $maildir;
+
+ -d $maildir or die_dir($maildir, 'is not a directory');
+
+ opendir(my $mdh, $maildir) or die_dir($maildir, "cannot be opened: $!");
+ my @contents = grep { !/^\.\.?$/ } readdir $mdh;
+ closedir $mdh;
+
+ my @required = ('cur', 'new', 'tmp');
+ foreach my $d (@required) {
+ -l "$maildir/$d" and die_dir($maildir, "contains symlink $d");
+ -e "$maildir/$d" or die_subdir($maildir, $d, 'is missing');
+ -d "$maildir/$d" or die_subdir($maildir, $d, 'is not a directory');
+ find(sub {
+ $_ eq '.' and return;
+ $_ eq '..' and return;
+ -l $_ or die_subdir($maildir, $d, "contains non-symlink $_");
+ }, "$maildir/$d");
+ }
+
+ my %required = map { $_ => 1 } @required;
+ foreach my $d (@contents) {
+ -l "$maildir/$d" and die_dir( $maildir, "contains symlink $d");
+ -d "$maildir/$d" or die_dir( $maildir, "contains non-directory $d");
+ exists($required{$d}) or die_dir( $maildir, "contains directory $d");
+ }
+}
# create an empty search cache maildir (if missing) or empty existing one
sub empty_search_cache_maildir($) {
push @args, "--duplicate=1" if $remove_dups;
push @args, $query;
+ check_search_cache_maildir($maildir);
empty_search_cache_maildir($maildir);
open my $pipe, '-|', @args or die "Running @args failed: $!\n";
while (<$pipe>) {