mirror of
https://github.com/Niko1221/Strata.git
synced 2026-11-09 17:36:14 -10:00
63 lines
3.2 KiB
JavaScript
63 lines
3.2 KiB
JavaScript
/**
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* The one place the App Host decides which Python to run. Every spawn of Python goes through it
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* (tuning, Time-skip, the revise command, the native MCP client, setup/calibration jobs, the native server).
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*
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* Order:
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* 1. STRATA_PYTHON, then STRATA_NATIVE_PYTHON (an explicit choice is never second-guessed)
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* 1b. the Control component's own interpreter, when the app ships one (control-runtime.mjs findControl):
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* the installed app never looks at the user's Python
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* 2. the repository's own venv: .venv\Scripts\python.exe on Windows, .venv/bin/python elsewhere
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* 3. Windows: `py -3` (the launcher), then python.exe; each one must actually start
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* (the Microsoft Store alias in WindowsApps exists on PATH but only opens the Store)
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* POSIX: Homebrew 3.11 / 3.10, then python3, then python
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* It returns { command, args } so `py -3` can be spawned as spawn(command, [...args, script]).
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*/
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import { existsSync } from 'node:fs';
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import { spawnSync } from 'node:child_process';
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import { join } from 'node:path';
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export function venvPython(repo, platform = process.platform) {
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return join(repo, '.venv', platform === 'win32' ? 'Scripts' : 'bin', platform === 'win32' ? 'python.exe' : 'python');
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}
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/** Does this interpreter start? A bare name is looked up on PATH by the spawn itself. */
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export function pythonStarts(command, args = []) {
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try {
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const result = spawnSync(command, [...args, '-c', 'import sys'], { timeout: 15000, windowsHide: true, stdio: 'ignore' });
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return !result.error && result.status === 0;
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} catch { return false; }
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}
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const cache = new Map();
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export function resolvePython({ repo = null, control = null, env = process.env, platform = process.platform, exists = existsSync, starts = pythonStarts, useCache = true } = {}) {
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const key = JSON.stringify([repo, control?.python ?? null, env.STRATA_PYTHON, env.STRATA_NATIVE_PYTHON, platform]);
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if (useCache && cache.has(key)) return cache.get(key);
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const found = (() => {
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const explicit = env.STRATA_PYTHON || env.STRATA_NATIVE_PYTHON;
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if (explicit) return { command: explicit, args: [], source: 'environment' };
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if (control?.python) return { command: control.python, args: [], source: 'bundled' };
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if (repo) {
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const venv = venvPython(repo, platform);
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if (exists(venv)) return { command: venv, args: [], source: 'venv' };
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}
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if (platform === 'win32') {
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if (starts('py', ['-3'])) return { command: 'py', args: ['-3'], source: 'py launcher' };
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if (starts('python.exe')) return { command: 'python.exe', args: [], source: 'PATH' };
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return { command: 'python.exe', args: [], source: 'fallback' };
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}
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for (const brew of ['/opt/homebrew/bin/python3.11', '/opt/homebrew/bin/python3.10']) {
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if (exists(brew)) return { command: brew, args: [], source: 'homebrew' };
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}
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return { command: 'python3', args: [], source: 'PATH' };
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})();
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// A failed lookup (the fallback) is not cached: the person may install Python and retry.
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if (useCache && found.source !== 'fallback') cache.set(key, found);
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return found;
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}
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/** A shell-ready command prefix such as `"py" -3`, for the few places that run a command string. */
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export function shellPrefix(python) {
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return [`"${python.command}"`, ...python.args].join(' ');
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}
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