cindex: rename --associate to --join, test w/ real repos

The association data is just stored as deflated JSON in Xapian
metadata keys of shard[0] for now.  It should be reasonably
compact and fit in memory for now since we'll assume sane,
non-malicious git coderepo history, for now.

The new cindex-join.t test requires TEST_REMOTE_JOIN=1 to be
set in the environment and tests the joins against the inboxes
and coderepos of two small projects with a common history.

Internally, we'll use `ibx_off', `root_off' instead of `ibx_id'
and `root_id' since `_id' may be mistaken for columns in an SQL
database which they are not.

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index 0d17e6e7..361a2356 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -14,7 +14,7 @@ use Scalar::Util qw(isvstring);
 use Carp ();
 our @EXPORT;
 my $lei_loud = $ENV{TEST_LEI_ERR_LOUD};
-my $tail_cmd = $ENV{TAIL};
+our $tail_cmd = $ENV{TAIL};
 our ($lei_opt, $lei_out, $lei_err);
 use autodie qw(chdir close fcntl mkdir open opendir seek unlink);
 
@@ -364,12 +364,15 @@ sub run_script ($;$$) {
         my $fhref = [];
         my $spawn_opt = {};
         my @tail_paths;
+        local $tail_cmd = $tail_cmd;
         for my $fd (0..2) {
                 my $redir = $opt->{$fd};
                 my $ref = ref($redir);
                 if ($ref eq 'SCALAR') {
                         my $fh;
-                        if ($tail_cmd && $ENV{TAIL_ALL} && $fd > 0) {
+                        if ($ENV{TAIL_ALL} && $fd > 0) {
+                                # tail -F is better, but not portable :<
+                                $tail_cmd //= 'tail -f';
                                 require File::Temp;
                                 $fh = File::Temp->new("fd.$fd-XXXX", TMPDIR=>1);
                                 push @tail_paths, $fh->filename;
@@ -820,7 +823,7 @@ sub create_coderepo ($$;@) {
         $tmpdir;
 }
 
-sub create_inbox ($$;@) {
+sub create_inbox ($;@) {
         my $ident = shift;
         my $cb = pop;
         my %opt = @_;