| /** | |
| * The command table: every program name this shell can run. A browser worker | |
| * spawns no processes, so this table IS the machine's `/bin` — a name that is | |
| * not here reports `command not found`, exactly as a real shell would for a | |
| * binary that is not installed. | |
| * @module @deepseek-ai/dsh-experimental-webworker-runtime/src/shell/programs | |
| */ | |
| import type { ShellProgram } from '../types.ts' | |
| import { BUILTIN_PROGRAMS } from './builtins.ts' | |
| import { FILE_PROGRAMS } from './files.ts' | |
| import { TEXT_PROGRAMS } from './text.ts' | |
| let table: Map<string, ShellProgram> | undefined | |
| /** | |
| * The standard command table, built once and shared by every command line. | |
| * @returns the program table, keyed by command name. | |
| */ | |
| export function standardPrograms(): ReadonlyMap<string, ShellProgram> { | |
| table ??= new Map<string, ShellProgram>([ | |
| ...Object.entries(BUILTIN_PROGRAMS), | |
| ...Object.entries(FILE_PROGRAMS), | |
| ...Object.entries(TEXT_PROGRAMS), | |
| ['which', which], | |
| ]) | |
| return table | |
| } | |
| /** Reports which of the requested names this shell can run. */ | |
| const which: ShellProgram = (argv, io) => { | |
| const known = standardPrograms() | |
| let status = 0 | |
| for (const name of argv.slice(1)) { | |
| // Every program is built into the shell, so a known name reports itself | |
| // instead of a path that would not exist in the VFS. | |
| if (known.has(name)) { | |
| io.out(`${name}: shell built-in command\n`) | |
| continue | |
| } | |
| io.err(`which: no ${name} in the worker host command table\n`) | |
| status = 1 | |
| } | |
| return status | |
| } | |