File size: 2,644 Bytes
09aec41 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | /** Shell selection and executable verification use the target execution provider. */
import { SubprocessExecutableNotFoundError, type SubprocessRuntime } from '@deepseek-ai/dsh-subprocess'
import type { TerminalShell } from './types.ts'
/**
* Resolve the configured shell or the execution environment's default shell.
* @param subprocess - target execution provider.
* @param configured - optional profile overriding the environment's default shell.
* @param signal - resolution cancellation.
* @returns one verified shell; a declared default that cannot resolve rejects.
*/
export async function resolveShell(
subprocess: SubprocessRuntime, configured: TerminalShell | undefined, signal: AbortSignal,
): Promise<TerminalShell> {
let shell = configured
if (shell === undefined) {
const environment = await subprocess.terminalEnvironment(signal)
shell = profile(environment.defaultShell ?? (environment.platform === 'windows' ? 'cmd.exe' : '/bin/sh'))
}
const path = await subprocess.resolveExecutable(shell.path, undefined, signal)
return { ...shell, path }
}
function profile(path: string): TerminalShell {
const name = path.slice(Math.max(path.lastIndexOf('/'), path.lastIndexOf('\\')) + 1)
const kind = name.toLowerCase().replace(/\.exe$/u, '')
return { path, name, args: kind === 'cmd' ? [] : kind === 'pwsh' || kind === 'powershell' ? ['-NoLogo'] : ['-i'] }
}
/**
* List verified candidates after the configured or environment-default shell.
* @param subprocess - target execution provider.
* @param configured - optional default profile.
* @param candidates - executable names or paths permitted for shell selection.
* @param signal - discovery cancellation.
* @returns unique installed shells, with the default first; transport failures reject.
*/
export async function discoverShells(
subprocess: SubprocessRuntime, configured: TerminalShell | undefined,
candidates: readonly string[], signal: AbortSignal,
): Promise<TerminalShell[]> {
const preferred = await resolveShell(subprocess, configured, signal)
const found = await Promise.all(candidates.map(async (candidate) => {
try { return await resolveShell(subprocess, profile(candidate), signal) }
catch (error) {
if (error instanceof SubprocessExecutableNotFoundError) return undefined
throw error
}
}))
const shells = new Map<string, TerminalShell>()
for (const shell of [preferred, ...found]) {
if (shell === undefined) continue
const key = shell.path.includes('\\') ? shell.path.toLowerCase() : shell.path
if (!shells.has(key)) shells.set(key, shell)
}
return [...shells.values()]
}
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