use rel2abs_collapsed when loading Inbox objects

[public-inbox.git] / lib / PublicInbox / Config.pm

diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index 2f5c83cd86c9f9322cca5a14120c6906c7cd73ea..577337dc8a024d375be2db4f72cffb0365be2ffb 100644 (file)
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -368,6 +368,16 @@ sub git_bool {
        }
 }
 
+# abs_path resolves symlinks, so we want to avoid it if rel2abs
+# is sufficient and doesn't leave "/.." or "/../"
+sub rel2abs_collapsed {
+       require File::Spec;
+       my $p = File::Spec->rel2abs($_[-1]);
+       return $p if substr($p, -3, 3) ne '/..' && index($p, '/../') < 0;
+       require Cwd;
+       Cwd::abs_path($p);
+}
+
 sub _fill {
        my ($self, $pfx) = @_;
        my $ibx = {};
@@ -391,9 +401,9 @@ EOF
        }
 
        # "mainrepo" is backwards compatibility:
-       $ibx->{inboxdir} //= $self->{"$pfx.mainrepo"} // return;
-       if ($ibx->{inboxdir} =~ /\n/s) {
-               warn "E: `$ibx->{inboxdir}' must not contain `\\n'\n";
+       my $dir = $ibx->{inboxdir} //= $self->{"$pfx.mainrepo"} // return;
+       if (index($dir, "\n") >= 0) {
+               warn "E: `$dir' must not contain `\\n'\n";
                return;
        }
        foreach my $k (qw(obfuscate)) {
@@ -436,7 +446,7 @@ EOF
                        $self->{-by_list_id}->{lc($list_id)} = $ibx;
                }
        }
-       if (my $ngname = $ibx->{newsgroup}) {
+       if (defined(my $ngname = $ibx->{newsgroup})) {
                if (ref($ngname)) {
                        delete $ibx->{newsgroup};
                        warn 'multiple newsgroups not supported: '.
@@ -445,7 +455,8 @@ EOF
                # wildmat-exact and RFC 3501 (IMAP) ATOM-CHAR.
                # Leave out a few chars likely to cause problems or conflicts:
                # '|', '<', '>', ';', '#', '$', '&',
-               } elsif ($ngname =~ m![^A-Za-z0-9/_\.\-\~\@\+\=:]!) {
+               } elsif ($ngname =~ m![^A-Za-z0-9/_\.\-\~\@\+\=:]! ||
+                               $ngname eq '') {
                        delete $ibx->{newsgroup};
                        warn "newsgroup name invalid: `$ngname'\n";
                } else {
@@ -454,6 +465,13 @@ EOF
                        $self->{-by_newsgroup}->{$ngname} = $ibx;
                }
        }
+       unless (defined $ibx->{newsgroup}) { # for ->eidx_key
+               my $abs = rel2abs_collapsed($dir);
+               if ($abs ne $dir) {
+                       warn "W: `$dir' canonicalized to `$abs'\n";
+                       $ibx->{inboxdir} = $abs;
+               }
+       }
        $self->{-by_name}->{$name} = $ibx;
        if ($ibx->{obfuscate}) {
                $ibx->{-no_obfuscate} = $self->{-no_obfuscate};