services/nomad/build/buildbot*: make buildroot a host volume

also increase the recent build count 20 -> 30

Author: classabbyamp

services/nomad/build/buildbot-worker.nomad

@@ -40,14 +40,25 @@ job "buildbot-worker" {
         }
       }
 
+      dynamic "volume" {
+        for_each = [ "${group.value.name}" ]
+        labels = [ "${volume.value}_buildrootdir" ]
+
+        content {
+          type = "host"
+          source = "${volume.value}_buildrootdir"
+          read_only = false
+        }
+      }
+
       // https://github.com/hashicorp/nomad/issues/8892
       task "prep-host-dirs" {
         driver = "docker"
 
         config {
           image = "ghcr.io/void-linux/void-glibc-full:20240526R1"
           command = "chown"
-          args = ["418:418", "/hostdir", "/workdir"]
+          args = ["418:418", "/hostdir", "/workdir", "/buildroots"]
         }
 
         volume_mount {
@@ -60,6 +71,11 @@ job "buildbot-worker" {
           destination = "/workdir"
         }
 
+        volume_mount {
+          volume = "${group.value.name}_buildrootdir"
+          destination = "/buildroots"
+        }
+
         lifecycle {
           hook = "prestart"
         }
@@ -94,6 +110,11 @@ job "buildbot-worker" {
           destination = "/workdir"
         }
 
+        volume_mount {
+          volume = "${group.value.name}_buildrootdir"
+          destination = "/buildroots"
+        }
+
         template {
           data = <<EOF
 {{ range service "buildbot-worker" -}}

services/nomad/build/buildbot.cfg

@@ -62,6 +62,7 @@ c = BuildmasterConfig = {
         'auth': netauth,
         'ui_default_config': {
             'Links.build_link_template': "%(build_number)",
+            'Home.max_recent_builds': 30,
             'Waterfall.number_background_waterfall': True,
             'Waterfall.show_builders_without_builds': True,
             'Builders.show_workers_name': True,
@@ -124,7 +125,7 @@ c['schedulers'].append(schedulers.ForceScheduler(
 distdir = lambda f: util.Interpolate(f'/workdir/%(prop:name)s/void-packages/{f}')
 bulkdir = lambda f: util.Interpolate(f'/workdir/%(prop:name)s/xbps-bulk/{f}')
 hostdir = '/hostdir'
-buildroot = 'buildroot'
+buildroot = lambda: util.Interpolate(f'/buildroots/%(prop:name)s/buildroot')
 builddir = lambda: util.Interpolate('builddir-%(prop:buildnumber)s')
 do_sync = lambda: util.Interpolate('%(prop:sync)s') == "True"
 hide_skipped = lambda results, _: results == SKIPPED
@@ -138,7 +139,7 @@ def make_xbps_src_cmd(props, cmd):
     command = [
         distdir('xbps-src'),
         '-H', hostdir,
-        '-m', buildroot,
+        '-m', buildroot(),
         '-A', props.getProperty('host'),
     ]
 
@@ -158,7 +159,7 @@ def make_xbps_bulk_cmd(props):
         bulkdir('configure'),
         '-h', hostdir,
         '-d', distdir(''),
-        '-m', f'../{buildroot}',
+        '-m', buildroot(),
         '-t',
     ]
     if props.getProperty('cross') == 'True':