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fix: publish resolved python_bin/lua_bin into the global dict

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bins.ensure() now stores the resolved interpreter path under
python_bin / lua_bin when the key is unset, so test scripts can use
$(python_bin) / $(lua_bin) in GUI mode (no -d override). Restores the
behaviour lost when bins.py centralised resolution. A user-provided
value is left untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Foué
2026-06-07 18:42:43 +02:00
parent 2241dfb8c7
commit 3d96e5060f
2 changed files with 9 additions and 3 deletions
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2
DESIGN.md
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@@ -124,7 +124,7 @@ To add a new API call usable from subprocesses:
`src/testium/interpreter/utils/bins.py` — single source of truth for the paths to the external Python and Lua interpreters used by subprocesses.
- `python_bin()` / `lua_bin()` : resolve and cache. The cache is keyed by `(name, override)` so that a later change to `gd[python_bin]` (typically when a `param.yaml` sets the key) triggers a re-resolution on the next lookup instead of returning the stale auto-discovered path. Falls back to discovery on PATH (candidates: `python3`/`python` and `lua`/`lua5.5`/`lua5.4`/`lua5.3`/`lua5.2`/`lua5.1`).
- `ensure(*names)` : called by `TestSet._validate_runtime_deps()` at test load. Always requires `python` (the eval engine always runs); requires `lua` only if a `lua_func` item is in the tree. Fails fast with a clear error citing tried candidates and override key.
- `ensure(*names)` : called by `TestSet._validate_runtime_deps()` at test load. Always requires `python` (the eval engine always runs); requires `lua` only if a `lua_func` item is in the tree. Fails fast with a clear error citing tried candidates and override key. Also **publishes** each resolved path into gd (`python_bin` / `lua_bin`) when the key is unset, so test scripts can reference `$(python_bin)` / `$(lua_bin)` regardless of launch mode (e.g. GUI, where no `-d` override is passed). A user-provided value is never overwritten.
Engines (`PyProcessBase`, `LuaProcessBase`, `EvalExecEngine`) call `bins.python_bin()`/`bins.lua_bin()` themselves — call sites never pass an explicit binary path.

10
src/testium/interpreter/utils/bins.py
View File

@@ -388,12 +388,18 @@ def ensure(*names):
"""
missing = []
for n in names:
if not _resolve(n):
display, gd_key, candidates, _ = _SPECS[n]
path = _resolve(n)
display, gd_key, candidates, _ = _SPECS[n]
if not path:
missing.append(
f" - {display}: tried {candidates} on PATH, none usable. "
f"Set '{gd_key}' in the YAML config to override."
)
elif not tm.gd(gd_key):
# Publish the resolved interpreter so test scripts can reference
# $(python_bin) / $(lua_bin) regardless of how testium was launched
# (e.g. GUI, where no -d override is passed).
tm.setgd(gd_key, path)
if missing:
raise ETUMRuntimeError(
"Required external interpreter(s) not found:\n" + "\n".join(missing)