* Add the bubblewrap build runtime (step 17, ADR 0007)
BwrapBuildRunner: third runtime behind BuildRunner for hosts without root
and without Docker (e.g. Hostsharing managed webspaces). Shells out to the
bwrap CLI, unpacks a prepared rootfs on demand into
.git/werkator/buildenv/<envKey>/rootfs, reuses the Docker runner's git
metadata mounts, and returns the attached bwrap process for streaming and
cancellation.
Config: bwrap.enabled/rootfs/env on BranchConfig and BwrapOverrides on
BuildDefinition; enabled/rootfs are pinned like the docker sandbox policy.
Docker and bwrap are mutually exclusive per build, rejected in
buildSettings instead of picked silently. DispatchingBuildRunner routes
bwrap; InitCommand template, docs/configuration.md and AGENTS.md in sync.
* bwrap rollout tooling: remote script, prerequisites disk/quota check, absolute workspace binds
- tools/remote: central remote control script with check-prerequisites, install and build commands
- tools/werkator-build-prerequisites.sh: compact PASS/FAIL output, target-dir parameter, free-space and
group-quota headroom checks against the ~5 GiB build footprint, home-filesystem reference
- BwrapBuildRunner: bind workspace and home at absolute paths resolved against repoDir — a relative
path made bwrap create mountpoints inside the read-only rootfs (seen on the webspace); regression test
- TestcontainersSmokeTest: gated with enabledIf docker available (skip, never fail, without a daemon)
- docs: configuration reference, step-17 plan notes, PR-doc
* bwrap: bind the repo read-write before the workspace so mountpoints are creatable
bwrap creates mountpoints for bind destinations inside the sandbox; with only a
read-only rootfs bound at /, creating them for the workspace under .git/werkator/
worktrees failed with 'Read-only file system' (seen on the webspace). Binding the
repo dir read-write first provides the base; the git metadata mounts then layer
the usual isolation on top (read-only .git, tmpfs mask over .git/werkator,
read-write worktree admin dir).
* bwrap: pre-create bind mountpoints inside the unpacked rootfs
bwrap mkdirs mountpoints for bind destinations against the sandbox view; with the
rootfs ro-bound at / every destination missing from the rootfs (the repo dir under
/home/storage/... on the webspace) fails with 'Read-only file system'. The rootfs
directory is a plain host dir, so create the mountpoints there before launching
bwrap; it then finds them and has nothing left to create.
* bwrap: skip existing rootfs files when pre-creating bind mountpoints
/etc/resolv.conf is a file the rootfs already ships; createDirectories threw on it.
Only missing directories are created now.
* bwrap: pre-create proc/dev/tmpfs mountpoints in the rootfs too
The rootfs archive ships no /proc or /dev (excluded when packed), so bwrap failed
mkdir'ing their mountpoints against the read-only root.
* bwrap: bind the workspace after the git metadata mounts
The tmpfs mask over .git/werkator shadowed the earlier workspace bind, because the
worktree lives under .git/werkator/worktrees — chdir then failed with ENOENT. The
workspace bind now comes last and shadows the mask at exactly its own path.
* systemd resource limits and webspace start command (step 17, web access)
- server.systemd.memoryMax/tasksMax (empty = directive omitted): on platforms where
the service runs in a shared memory slice (Hostsharing Managed Webspaces) a
runaway Gradle build must not starve the whole package; init --systemd reads the
effective config and bakes the values into the generated unit
- tools/remote werkator start: writes server settings (assigned port, loopback
bind, publicBaseUrl, nginx off) plus the Apache reverse-proxy .htaccess into
~/doms/<domain>/subs/www, runs init --systemd and enables the user unit
- docs/configuration.md documents the new keys
* tools/remote: env-based configuration and background port-forward
All connection and deployment values come from .env in the repository root
(WERKATOR_REMOTE, WERKATOR_PATH, WERKATOR_PORT, WERKATOR_DOMAIN,
WERKATOR_LOCAL_PORT, optional WERKATOR_BRANCH/MEMORY_MAX/TASKS_MAX/ROOTFS);
missing values fail with a pointing error instead of positional parameters.
- port-forward is now 'tools/remote port-forward start|stop' with a detached
ssh tunnel, pid file under /tmp, and idempotent start
- start restarts the systemd unit after updating the machine config
- control-token generates the token in place when the server has not yet
- the rootfs archive default moves to build/ (already gitignored)
Michael Hönnig
71f1fc62c6