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Russell Bryant
7274a6bea3
* feat(cli): add --env flag to sandbox create and exec
Add `--env KEY=VALUE` (repeatable) to `openshell sandbox create` and
`openshell sandbox exec`, wiring user-specified environment variables
into the existing `SandboxSpec.environment` and
`ExecSandboxRequest.environment` protobuf fields which were previously
only accessible via the SDK/gRPC API.
Fix a bug where user-specified environment variables set via
`SandboxSpec.environment` were silently dropped inside sandbox SSH
sessions. The SSH handler's `apply_child_env()` calls `env_clear()` to
strip supervisor-internal secrets before spawning user shells, but this
also wiped container-level env vars including user-specified ones. This
was introduced in 5fd4885a (2026-02-26, "feat(sandbox): VS Code
Remote-SSH support with platform detection fix") which added
`env_clear()` to fix a VS Code platform detection timeout caused by
leaked supervisor env vars.
The fix introduces an `OPENSHELL_USER_ENVIRONMENT` sidecar env var:
compute drivers (Docker, Podman, Kubernetes, VM) serialize the
user-specified environment as JSON into this variable at container
creation time, the sandbox supervisor deserializes it at startup, and
the SSH handler re-injects the values into child processes after
`env_clear()`. User-specified vars are applied at lowest priority so
proxy, TLS, and provider credentials still take precedence.
Signed-off-by: Russell Bryant <russell.bryant@gmail.com>
* fix(sandbox): address PR review feedback for env var injection
- VM driver: restructure build_guest_environment to apply user env
before required driver vars, preventing user-specified values from
overriding OPENSHELL_ENDPOINT, PATH, and other critical vars.
Matches the pattern already used by Docker/Podman/Kubernetes.
- All drivers: insert OPENSHELL_USER_ENVIRONMENT sidecar after
environment.extend(user_env) so a user-supplied key of the same
name cannot clobber the JSON payload the supervisor parses.
- Podman driver: fix template/spec env precedence — template env is
now applied first with spec overwriting, matching the other drivers
(spec is user-specified and should win over image defaults).
- CLI: add parse_env_pairs() that rejects OPENSHELL_* prefixed keys
with a clear error message. Both sandbox create and exec call sites
updated to use it.
- SSH handler: filter out OPENSHELL_* keys from user_environment
before injecting into child processes.
- Docs: add "Set Environment Variables" section to manage-sandboxes.mdx
documenting --env for both create and exec, per-command override
semantics, and the OPENSHELL_* reservation.
- Tests: add sandbox_create_env_rejects_reserved_prefix test.
- Fix rustfmt formatting in lib.rs, container.rs, driver.rs.
* fix(server): reject OPENSHELL_* env keys at API boundary
Add server-side validation to reject environment variable keys starting
with OPENSHELL_ in SandboxSpec.environment, SandboxTemplate.environment,
and ExecSandboxRequest.environment. This closes the gap where SDK/gRPC
callers (bypassing the CLI) could inject reserved keys that affect
supervisor-internal state.
The CLI already rejects these keys via parse_env_pairs, but the API
boundary is the authoritative enforcement point since all clients
(CLI, SDK, direct gRPC) pass through it.
* fix(server): validate env key names and control chars at API boundary
Add POSIX env key format validation (^[A-Za-z_][A-Za-z0-9_]*$) and
control character rejection for SandboxSpec.environment,
SandboxTemplate.environment, and ExecSandboxRequest.environment at the
gRPC validation layer. This catches invalid keys like "1BAD" or
"BAD-NAME" and values containing newlines at the API boundary rather
than letting them surface as driver-specific container/pod failures.
Also add matching CLI-side validation in parse_env_pairs so users get
immediate feedback. Update docs to say "OpenShell rejects" rather than
"the CLI rejects" since enforcement is now at both boundaries.
* fix(server): allow exec helper keys and add env size limit
Split exec env validation so OPENSHELL_PYFUNC_B64 (used by the Python
SDK's exec_python()) passes through while runtime-clobberable keys
like OPENSHELL_SANDBOX_ID are still rejected. Create-time validation
remains strict — all OPENSHELL_* keys are blocked.
Add a 256 KiB total serialized-size limit on create-time environment
maps. The drivers serialize the full map into a single
OPENSHELL_USER_ENVIRONMENT env var; capping the input at the API
boundary prevents driver/runtime-specific startup failures from
oversized env blocks.
Add template environment control-character test and exec helper key
acceptance test.
---------
Signed-off-by: Russell Bryant <russell.bryant@gmail.com>