v2writable: allow setting nproc via creat options

Avoiding reliance on environment variables is a bit cleaner
for writing tests

5 files changed, 16 insertions, 14 deletions

diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index b92d8d24..afcac4d2 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -24,7 +24,14 @@ use IO::Handle;
 my $PACKING_FACTOR = 0.4;
 
 # assume 2 cores if GNU nproc(1) is not available
-sub nproc_parts () {
+sub nproc_parts ($) {
+        my ($creat_opt) = @_;
+        if (ref($creat_opt) eq 'HASH') {
+                if (defined(my $n = $creat_opt->{nproc})) {
+                        return $n
+                }
+        }
+
         my $n = int($ENV{NPROC} || `nproc 2>/dev/null` || 2);
         # subtract for the main process and git-fast-import
         $n -= 1;
@@ -52,6 +59,8 @@ sub count_partitions ($) {
 }
 
 sub new {
+        # $creat may be any true value, or 0/undef.  A hashref is true,
+        # and $creat->{nproc} may be set to an integer
         my ($class, $v2ibx, $creat) = @_;
         my $dir = $v2ibx->{mainrepo} or die "no mainrepo in inbox\n";
         unless (-d $dir) {
@@ -80,7 +89,7 @@ sub new {
                 rotate_bytes => int((1024 * 1024 * 1024) / $PACKING_FACTOR),
                 last_commit => [], # git repo -> commit
         };
-        $self->{partitions} = count_partitions($self) || nproc_parts();
+        $self->{partitions} = count_partitions($self) || nproc_parts($creat);
         bless $self, $class;
 }
 
diff --git a/script/public-inbox-index b/script/public-inbox-index
index 2f810a56..b353093e 100755
--- a/script/public-inbox-index
+++ b/script/public-inbox-index
@@ -71,8 +71,7 @@ sub index_dir {
                 eval { require PublicInbox::V2Writable };
                 die "v2 requirements not met: $@\n" if $@;
                 my $v2w = eval {
-                        $jobs and local $ENV{NPROC} = $jobs;
-                        PublicInbox::V2Writable->new($repo);
+                        PublicInbox::V2Writable->new($repo, {nproc=>$jobs});
                 };
                 if (defined $jobs) {
                         if ($jobs == 0) {
diff --git a/t/purge.t b/t/purge.t
index b518c26f..574935e0 100644
--- a/t/purge.t
+++ b/t/purge.t
@@ -35,12 +35,11 @@ Hello World
 
 EOF
 
-local $ENV{NPROC} = '1';
 my $cfgfile = "$tmpdir/config";
 local $ENV{PI_CONFIG} = $cfgfile;
 open my $cfg_fh, '>', $cfgfile or die "open: $!";
 
-my $v2w = PublicInbox::V2Writable->new($ibx, 1);
+my $v2w = PublicInbox::V2Writable->new($ibx, {nproc => 1});
 my $mime = PublicInbox::MIME->new($raw);
 ok($v2w->add($mime), 'add message to be purged');
 $v2w->done;
diff --git a/t/v2reindex.t b/t/v2reindex.t
index 8a3071b7..c416629c 100644
--- a/t/v2reindex.t
+++ b/t/v2reindex.t
@@ -39,14 +39,13 @@ my $mime = PublicInbox::MIME->create(
         ],
         body => $agpl,
 );
-local $ENV{NPROC} = 2;
 my $minmax;
 my $msgmap;
 my ($mark1, $mark2, $mark3, $mark4);
 {
         my %config = %$ibx_config;
         my $ibx = PublicInbox::Inbox->new(\%config);
-        my $im = PublicInbox::V2Writable->new($ibx, 1);
+        my $im = PublicInbox::V2Writable->new($ibx, {nproc => 1});
         my $im0 = $im->importer();
         foreach my $i (1..10) {
                 $mime->header_set('Message-Id', "<$i\@example.com>");
diff --git a/t/v2writable.t b/t/v2writable.t
index f8ef415a..75110155 100644
--- a/t/v2writable.t
+++ b/t/v2writable.t
@@ -33,10 +33,7 @@ my $mime = PublicInbox::MIME->create(
         body => "hello world\n",
 );
 
-my $im = eval {
-        local $ENV{NPROC} = '1';
-        PublicInbox::V2Writable->new($ibx, 1);
-};
+my $im = PublicInbox::V2Writable->new($ibx, {nproc => 1});
 is($im->{partitions}, 1, 'one partition when forced');
 ok($im->add($mime), 'ordinary message added');
 foreach my $f ("$mainrepo/msgmap.sqlite3",
@@ -201,11 +198,10 @@ EOF
         is_deeply([sort keys %lg], [sort keys %$rover], 'XROVER range OK');
 };
 {
-        local $ENV{NPROC} = 2;
         my @log = qw(log --no-decorate --no-abbrev --no-notes --no-color);
         my @before = $git0->qx(@log, qw(--pretty=oneline));
         my $before = $git0->qx(@log, qw(--pretty=raw --raw -r));
-        $im = PublicInbox::V2Writable->new($ibx, 1);
+        $im = PublicInbox::V2Writable->new($ibx, {nproc => 2});
         is($im->{partitions}, 1, 'detected single partition from previous');
         my $smsg = $im->remove($mime, 'test removal');
         $im->done;