Files
msd-core/scripts/gen-exit-code-registry.cjs
Tom Boucher 12f9d1d9a0 enhance(#3913): docs, and the guards come down (#3994)
ADR-3889 terminal phase. Generated docs/reference/exit-codes.md from the exit-code declaration with a --check drift arm; deleted the inert soft-error-exit-zero oracle; promoted untyped-success from SMELL to VIOLATION so it can fail a build; pruned all 5 smell-baseline entries.

Fixed inline: two mis-scoped oracles (routing-validity, value-hygiene), a second source behind the band table, unescaped declaration strings reaching Markdown, and a pre-existing Windows 8.3 short-name path-comparison defect.

Guard ledger corrected from a claimed net -4 to a measured net -1.

Closes #3913
2026-08-28 13:10:20 -04:00

892 lines
36 KiB
JavaScript

#!/usr/bin/env node
/**
* gen-exit-code-registry.cjs — generates FIVE byte-identical/derived
* artifacts from the declaration at gsd-core/bin/shared/exit-codes.json:
* - gsd-core/bin/lib/exit-code-registry.cjs (tsc-adjacent build tree)
* - scripts/lib/exit-code-registry.cjs (committed, for scripts/
* consumers that must work on an unbuilt clone — same reason
* scripts/lib/cli-exit.cjs exists alongside gsd-core/bin/lib/cli-exit.cjs;
* see scripts/gen-scripts-cli-exit.cjs).
* - hooks/lib/exit-code-registry.js (committed, for hooks/
* consumers that must work on a raw, unbuilt clone — same reason as the
* scripts/ copy above; see scripts/gen-hooks-cli-exit.cjs, which emits
* hooks/lib/cli-exit.js's sibling `require('./exit-code-registry.js')`.
* `.js`, not `.cjs`, to match the hooks/lib/*.js convention — ADR-3889
* Phase 7, #3911).
* - src/exit-code-registry.d.cts (the ambient type declaration
* tsc uses to typecheck src/cli-exit.cts's `require('./exit-code-registry.cjs')`
* against the shape the .cjs artifacts above actually export — generated
* from the SAME ENTRY_FIELD_TYPES table serializeRegistry() uses, so the
* two can never independently drift).
* - gsd-core/bin/shared/exit-codes.sh (POSIX sh, safe under
* `set -u`: one `export EXIT_<NAME>=<code>` per entry, sourced by the
* bash scanners under scripts/ so a shell caller never re-invents a
* literal exit-code integer — ADR-3889 Phase 4, #3908).
*
* ADR-3889 ("One exit-code registry — 0 and 1 are free, everything else is
* allocated") Phase 1 (#3905) built the single-output allocator; Phase 2
* (#3906) added the second .cjs emission so scripts/ has its own committed
* copy instead of reaching into gitignored build output; a follow-up closed
* the review finding that the .d.cts was hand-maintained with no gate by
* generating it here too; Phase 4 (#3908) added the shell fragment so the
* three bash scanners can source symbolic names instead of hardcoding
* integers; Phase 7 (#3911) added the hooks/lib/ copy so a shipped hook can
* terminate through `terminateNow` without depending on any build artifact.
*
* The three .cjs/.js artifacts (primary, scripts, hooks) are byte-identical:
* serializeRegistry() only encodes the DECLARATION path (for the banner
* comment), never the output path, so one generated string is written to all
* three locations unchanged. The .d.cts and .sh artifacts are separate,
* smaller derivations but are generated and --check-gated exactly the same
* way.
*
* Nothing in this script emits a registered exit code itself; wiring
* consumers onto the registry is separate work.
*
* Usage:
* node scripts/gen-exit-code-registry.cjs # same as --write
* node scripts/gen-exit-code-registry.cjs --write # write all five artifacts
* node scripts/gen-exit-code-registry.cjs --check # exit 1 if ANY committed artifact is stale
* node scripts/gen-exit-code-registry.cjs --declaration <path> --out <path> --scripts-out <path> --hooks-out <path> --dts-out <path> --sh-out <path> # override for tests
* node scripts/gen-exit-code-registry.cjs --json # emit ONE JSON report on stdout instead of human prose
*/
'use strict';
const fs = require('node:fs');
const path = require('node:path');
const REPO_ROOT = path.resolve(__dirname, '..');
const DEFAULT_DECLARATION_PATH = path.join(REPO_ROOT, 'gsd-core', 'bin', 'shared', 'exit-codes.json');
const DEFAULT_OUTPUT_PATH = path.join(REPO_ROOT, 'gsd-core', 'bin', 'lib', 'exit-code-registry.cjs');
const DEFAULT_SCRIPTS_OUTPUT_PATH = path.join(REPO_ROOT, 'scripts', 'lib', 'exit-code-registry.cjs');
const DEFAULT_HOOKS_OUTPUT_PATH = path.join(REPO_ROOT, 'hooks', 'lib', 'exit-code-registry.js');
const DEFAULT_DTS_OUTPUT_PATH = path.join(REPO_ROOT, 'src', 'exit-code-registry.d.cts');
const DEFAULT_SH_OUTPUT_PATH = path.join(REPO_ROOT, 'gsd-core', 'bin', 'shared', 'exit-codes.sh');
/**
* Single source of the entry field list (name -> TS type), in emission order.
* serializeRegistry()'s per-entry object literal and serializeDts()'s
* ExitCodeEntry interface are BOTH derived from this one table, so the two
* artifacts cannot independently drift out of shape with each other — closing
* the review finding that the ambient .d.cts was a hand-maintained guess at
* what serializeRegistry() emits.
*/
const ENTRY_FIELD_TYPES = Object.freeze({
code: 'number',
name: 'string',
meaning: 'string',
owner: 'string',
authorizedBy: 'string',
});
/** Frozen reason codes so tests assert on structure, not prose. */
const REASON = Object.freeze({
OK: 'ok_generated_sync',
DRIFTED: 'fail_generated_drifted',
USAGE: 'fail_usage',
MISSING_DECLARATION: 'fail_missing_declaration',
MALFORMED_DECLARATION: 'fail_malformed_declaration',
NOT_AN_ARRAY: 'fail_not_an_array',
EMPTY_DECLARATION: 'fail_empty_declaration',
INVALID_ENTRY: 'fail_invalid_entry',
DUPLICATE_CODE: 'fail_duplicate_code',
DUPLICATE_NAME: 'fail_duplicate_name',
RESERVED_CODE: 'fail_reserved_code',
FORBIDDEN_OWNER: 'fail_forbidden_owner',
MISSING_ARTIFACT: 'fail_missing_artifact',
INVALID_CHARACTERS: 'fail_invalid_characters',
});
const USAGE_MESSAGE = [
'Usage: node scripts/gen-exit-code-registry.cjs [--write|--check] [--declaration <path>] [--out <path>] [--scripts-out <path>] [--hooks-out <path>] [--dts-out <path>] [--sh-out <path>] [--json]',
' (no flag) same as --write',
' --write write all five generated registry artifacts',
' --check exit 1 if ANY committed artifact is stale',
' --declaration override the declaration path (default: gsd-core/bin/shared/exit-codes.json)',
' --out override the primary output artifact path (default: gsd-core/bin/lib/exit-code-registry.cjs)',
' --scripts-out override the secondary output artifact path (default: scripts/lib/exit-code-registry.cjs)',
' --hooks-out override the hooks output artifact path (default: hooks/lib/exit-code-registry.js)',
' --dts-out override the ambient type declaration path (default: src/exit-code-registry.d.cts)',
' --sh-out override the shell-sourceable fragment path (default: gsd-core/bin/shared/exit-codes.sh)',
' --json emit ONE JSON report ({ok, reason, context, detail?}) on stdout instead of human-readable prose',
].join('\n');
/** SCREAMING_SNAKE_CASE: starts with a letter, only uppercase letters/digits/underscores. */
const NAME_RE = /^[A-Z][A-Z0-9_]*$/;
/** Fields every entry must carry as a non-empty, non-whitespace-only string. */
const REQUIRED_STRING_FIELDS = ['meaning', 'owner', 'authorizedBy'];
/**
* Characters forbidden in any declaration string field: a literal pipe `|`
* (the Markdown table cell delimiter `gen-exit-code-docs.cjs`'s
* `renderRegisteredTable` interpolates these fields into — an unescaped `|`
* breaks the row and everything after it lands verbatim in the rendered
* page, including a forged Markdown heading), and any C0 control character
* (`\x00`-`\x1F`, `\x7F`) — which subsumes CR (`\r`) and LF (`\n`), both of
* which would otherwise let a single declaration entry inject an entire
* extra row (or non-table content) into the generated table.
*
* Enforced HERE, at the validator both generators share (`gen-exit-code-registry.cjs`'s
* `validateEntry`, called by `gen-exit-code-docs.cjs`'s `loadEntries`), not
* at the docs renderer — failing closed at the declaration source is
* correct: an escaping fix at render time would let a malformed declaration
* through validation and only cosmetically repair the symptom (#3913 P9
* SEC-3).
*
* Checked via char codes rather than a literal control-character regex
* range — same approach as `scripts/registry-schema.cjs`'s
* `hasDisallowedControlChar` — so this never trips ESLint's `no-control-regex`.
*
* @param {string} v
* @returns {boolean}
*/
function hasForbiddenDeclarationChar(v) {
for (let i = 0; i < v.length; i += 1) {
const code = v.charCodeAt(i);
if (code === 0x7c) return true; // '|'
if (code < 0x20 || code === 0x7f) return true; // C0 control chars (incl. CR/LF/tab) + DEL
}
return false;
}
/**
* Bands, per ADR-3889 §1:
* 0, 1 free (not allocatable here)
* 2 hook-adapter only
* 3-13 Node-reserved
* 14-63, 79, 126+ outside every band
* 64-78 generic
* 80-125 domain
*
* SINGLE SOURCE for every band boundary in this file: `isAllocatableCode`,
* `bandFor`, and (via scripts/gen-exit-code-docs.cjs's `classifyBand`) the
* generated "Reserved bands" table are ALL derived from this one ordered
* list of `{category, allocatable, test}` predicates — there is no second
* hand-typed range anywhere else. Widening or narrowing a band means editing
* a `test` function here; every consumer (validation, the docs page) picks
* that change up with nothing else to keep in sync.
*/
const BANDS = Object.freeze([
{ category: 'free', allocatable: false, test: (code) => code === 0 || code === 1 },
{ category: 'hook-only', allocatable: true, test: (code) => code === 2 },
{ category: 'node-reserved', allocatable: false, test: (code) => code >= 3 && code <= 13 },
{ category: 'generic', allocatable: true, test: (code) => code >= 64 && code <= 78 },
{ category: 'domain', allocatable: true, test: (code) => code >= 80 && code <= 125 },
{ category: 'shell-signal', allocatable: false, test: (code) => code >= 126 },
]);
/** The band a code falls into, or `null` for the residual "outside every band" gap (14-63, 79) that no BANDS entry above claims. */
function bandEntryFor(code) {
return BANDS.find((band) => band.test(code)) || null;
}
function isAllocatableCode(code) {
const band = bandEntryFor(code);
return band !== null && band.allocatable;
}
/**
* Label the non-allocatable band a rejected code falls into, per the same
* BANDS table isAllocatableCode reads. Only called for codes that already
* failed isAllocatableCode, so an allocatable band's category is never
* returned here.
* @returns {string}
*/
function bandFor(code) {
const band = bandEntryFor(code);
return band ? band.category : 'outside-every-band'; // 14-63, 79
}
/**
* Validate a single declaration entry's shape and band membership.
* @returns {{ok:true}|{ok:false,reason:string,message:string,context:object}}
*/
function validateEntry(entry, index) {
if (typeof entry !== 'object' || entry === null || Array.isArray(entry)) {
return {
ok: false,
reason: REASON.INVALID_ENTRY,
message: `entry[${index}] is not an object: ${JSON.stringify(entry)}`,
context: { field: 'entry', index },
};
}
const { code, name } = entry;
if (!Number.isInteger(code) || code < 0) {
return {
ok: false,
reason: REASON.INVALID_ENTRY,
message: `entry[${index}].code must be a non-negative integer (no coercion), received ${JSON.stringify(code)}`,
context: { field: 'code', index, code },
};
}
if (typeof name !== 'string' || name.trim() === '' || !NAME_RE.test(name)) {
return {
ok: false,
reason: REASON.INVALID_ENTRY,
message: `entry[${index}].name must be a non-empty SCREAMING_SNAKE_CASE string, received ${JSON.stringify(name)}`,
context: { field: 'name', index, code, name },
};
}
for (const field of REQUIRED_STRING_FIELDS) {
const value = entry[field];
if (typeof value !== 'string' || value.trim() === '') {
return {
ok: false,
reason: REASON.INVALID_ENTRY,
message: `entry[${index}] (${name}).${field} must be a non-empty string, received ${JSON.stringify(value)}`,
context: { field, index, code, name },
};
}
if (hasForbiddenDeclarationChar(value)) {
return {
ok: false,
reason: REASON.INVALID_CHARACTERS,
message: `entry[${index}] (${name}).${field} must not contain a "|", CR, LF, or other control character ` +
`(these are interpolated into a Markdown table cell by gen-exit-code-docs.cjs), received ${JSON.stringify(value)}`,
context: { field, index, code, name },
};
}
}
if (!isAllocatableCode(code)) {
return {
ok: false,
reason: REASON.RESERVED_CODE,
message: `entry[${index}] (${name}) declares code ${code}, which is outside every allocatable band ` +
`(2 hook-adapter only; 64-78 generic; 80-125 domain) — see ADR-3889 §1`,
context: { code, band: bandFor(code), index, name },
};
}
if (code === 2 && entry.owner !== 'hook-adapter') {
return {
ok: false,
reason: REASON.FORBIDDEN_OWNER,
message: `entry[${index}] (${name}) declares code 2 with owner "${entry.owner}" — code 2 is reserved to ` +
`the Claude Code hook protocol and may only be owned by "hook-adapter"`,
context: { code, owner: entry.owner, requiredOwner: 'hook-adapter', index, name },
};
}
return { ok: true };
}
/**
* Validate the whole declaration: every entry individually, then the
* cross-entry invariants (one number one meaning; one owner emits a given
* code — but the SAME owner may legitimately own several distinct codes).
* @returns {{ok:true}|{ok:false,reason:string,message:string,context:object}}
*/
function validateEntries(entries) {
for (let i = 0; i < entries.length; i++) {
const result = validateEntry(entries[i], i);
if (!result.ok) return result;
}
const byCode = new Map();
const byName = new Map();
for (const entry of entries) {
if (byCode.has(entry.code)) {
const other = byCode.get(entry.code);
return {
ok: false,
reason: REASON.DUPLICATE_CODE,
message: `code ${entry.code} is declared twice: "${other.name}" and "${entry.name}"`,
context: { code: entry.code, names: [other.name, entry.name] },
};
}
byCode.set(entry.code, entry);
if (byName.has(entry.name)) {
const other = byName.get(entry.name);
return {
ok: false,
reason: REASON.DUPLICATE_NAME,
message: `name "${entry.name}" is declared twice: code ${other.code} and code ${entry.code}`,
context: { name: entry.name, codes: [other.code, entry.code] },
};
}
byName.set(entry.name, entry);
}
return { ok: true };
}
/**
* Load and parse the declaration file.
* @returns {{ok:true,entries:Array}|{ok:false,reason:string,message:string}}
*/
function loadDeclaration(declarationPath) {
if (!fs.existsSync(declarationPath)) {
return {
ok: false,
reason: REASON.MISSING_DECLARATION,
message: `declaration not found at ${declarationPath}`,
context: { path: declarationPath },
};
}
let raw;
try {
raw = fs.readFileSync(declarationPath, 'utf8');
} catch (err) {
return {
ok: false,
reason: REASON.MISSING_DECLARATION,
message: `could not read ${declarationPath}: ${err.message}`,
context: { path: declarationPath },
};
}
let parsed;
try {
parsed = JSON.parse(raw);
} catch (err) {
return {
ok: false,
reason: REASON.MALFORMED_DECLARATION,
message: `${declarationPath} is not valid JSON: ${err.message}`,
context: { path: declarationPath },
};
}
if (!Array.isArray(parsed)) {
return {
ok: false,
reason: REASON.NOT_AN_ARRAY,
message: `${declarationPath} must be a JSON array, received ${parsed === null ? 'null' : typeof parsed}`,
context: { path: declarationPath },
};
}
if (parsed.length === 0) {
return {
ok: false,
reason: REASON.EMPTY_DECLARATION,
message: `${declarationPath} is an empty array — declare at least one exit code`,
context: { path: declarationPath },
};
}
return { ok: true, entries: parsed };
}
/**
* Hand-serialize the generated registry module (string concatenation, like
* gsd-core/bin/lib/capability-registry.cjs — no build step, no template
* engine, so the emitted bytes are exactly what `--check` re-derives).
*/
function serializeRegistry(entries, declarationPath) {
const relDeclaration = path.relative(REPO_ROOT, declarationPath).split(path.sep).join('/');
const banner = [
'\'use strict\';',
'',
'// GENERATED FILE — DO NOT EDIT BY HAND.',
`// Source of truth: ${relDeclaration}. Regenerate with:`,
'// node scripts/gen-exit-code-registry.cjs --write',
'// This exact content is emitted to THREE locations — gsd-core/bin/lib/exit-code-registry.cjs,',
'// scripts/lib/exit-code-registry.cjs, and hooks/lib/exit-code-registry.js (the latter two',
'// committed so scripts/ and hooks/ consumers work on an unbuilt clone) — all byte-compared by',
'// `npm run lint:generated-sync` (#3905 ADR-3889 Phase 1; #3906 Phase 2 added the second copy;',
'// #3911 ADR-3889 Phase 7 added the hooks/lib/ copy).',
'//',
'// exitCodeFor(name) / nameForExitCode(code) are pure and total over this',
'// closed table — each throws for anything not registered here.',
'',
].join('\n');
const entryFieldNames = Object.keys(ENTRY_FIELD_TYPES);
const entryLiterals = entries.map((e) => {
const fieldLines = entryFieldNames.map((field) => ` ${field}: ${JSON.stringify(e[field])},`).join('\n');
return ` Object.freeze({\n${fieldLines}\n })`;
}).join(',\n');
const body = [
'const EXIT_CODES = Object.freeze([',
entryLiterals,
']);',
'',
'const NAME_TO_CODE = new Map(EXIT_CODES.map((entry) => [entry.name, entry.code]));',
'const CODE_TO_NAME = new Map(EXIT_CODES.map((entry) => [entry.code, entry.name]));',
'',
'/**',
' * Resolve the registered exit code for a symbolic name. Pure, total: throws',
' * for anything not an exact, registered, exact-case key — including',
' * non-strings, the empty string, untrimmed strings, wrong case, and',
' * prototype-chain names like `__proto__`/`constructor`/`toString` (a Map',
' * lookup never touches the prototype chain, so these are indistinguishable',
' * from any other unregistered name).',
' *',
' * @param {string} name',
' * @returns {number}',
' */',
'function exitCodeFor(name) {',
' if (typeof name !== \'string\' || name.length === 0) {',
' throw new Error(`exitCodeFor: name must be a non-empty string, received ${JSON.stringify(name)}`);',
' }',
' if (!NAME_TO_CODE.has(name)) {',
' throw new Error(`exitCodeFor: unregistered exit code name: ${JSON.stringify(name)}`);',
' }',
' return NAME_TO_CODE.get(name);',
'}',
'',
'/**',
' * Reverse of exitCodeFor: resolve the symbolic name for a registered exit',
' * code. Pure, total: throws for anything not an exact, registered code.',
' *',
' * @param {number} code',
' * @returns {string}',
' */',
'function nameForExitCode(code) {',
' if (!CODE_TO_NAME.has(code)) {',
' throw new Error(`nameForExitCode: unregistered exit code: ${JSON.stringify(code)}`);',
' }',
' return CODE_TO_NAME.get(code);',
'}',
'',
'module.exports = { EXIT_CODES, exitCodeFor, nameForExitCode };',
'',
].join('\n');
return banner + '\n' + body;
}
/**
* Generate the ambient type declaration for the generated .cjs registry
* artifacts. Derived from the SAME ENTRY_FIELD_TYPES table serializeRegistry()
* iterates for its per-entry object literals, and from serializeRegistry()'s
* own fixed `module.exports = { EXIT_CODES, exitCodeFor, nameForExitCode }`
* shape — so this declaration cannot drift out of step with what the sibling
* .cjs artifacts actually export without both call sites being edited
* together. Structural only (no per-entry data): the type is the same
* regardless of how many rows the declaration has.
*/
function serializeDts(declarationPath) {
const relDeclaration = path.relative(REPO_ROOT, declarationPath).split(path.sep).join('/');
const fieldLines = Object.entries(ENTRY_FIELD_TYPES)
.map(([field, type]) => ` readonly ${field}: ${type};`)
.join('\n');
return [
'// GENERATED FILE — DO NOT EDIT BY HAND.',
`// Source of truth: ${relDeclaration} + the ENTRY_FIELD_TYPES table in`,
'// scripts/gen-exit-code-registry.cjs. Regenerate with:',
'// node scripts/gen-exit-code-registry.cjs --write',
'//',
'// Ambient type declaration for exit-code-registry.cjs — a GENERATED,',
'// committed artifact with no `.cts` source of its own (it is hand-serialized',
'// from gsd-core/bin/shared/exit-codes.json by scripts/gen-exit-code-registry.cjs,',
'// ADR-3889 §2, #3905/#3906), so tsc has nothing to compile for it. This file',
"// exists purely so `src/cli-exit.cts`'s `require('./exit-code-registry.cjs')`",
'// type-checks against the SAME shape the generated artifact actually exports',
'// at runtime — mirroring the src/vendor/*.d.cts pattern already used for',
'// other verbatim/generated JS this tree resolves types for without compiling.',
'//',
'// This declaration is generated from the same ENTRY_FIELD_TYPES table',
"// serializeRegistry()'s per-entry object literals iterate, and is",
'// byte-compared by `node scripts/gen-exit-code-registry.cjs --check`',
'// (the same check that already covers the two sibling .cjs artifacts) so a',
'// shape drift here fails the build instead of surfacing at a destructuring',
'// call site.',
'',
'export interface ExitCodeEntry {',
fieldLines,
'}',
'',
'declare const exitCodeRegistry: {',
' readonly EXIT_CODES: readonly ExitCodeEntry[];',
' // Property-typed function signatures (`name: (args) => ret`), NOT method',
' // shorthand (`name(args): ret`) — the latter is a TS "method" and trips',
' // @typescript-eslint/unbound-method at every destructuring call site',
' // (`const { exitCodeFor } = ...`), since a method may implicitly use',
' // `this`. These are pure functions that never do, so they are typed as',
' // plain function-valued properties instead.',
' exitCodeFor: (name: string) => number;',
' nameForExitCode: (code: number) => string;',
'};',
'',
'export = exitCodeRegistry;',
'',
].join('\n');
}
/**
* Generate the shell-sourceable fragment: one `export EXIT_<NAME>=<code>`
* line per declared entry, POSIX sh, safe under `set -u` (a sourced file that
* only ever ASSIGNS variables can never trip an unset-variable check,
* regardless of what the caller's shell had in scope beforehand).
*
* Consumed by the bash scanners under scripts/ via `. gsd-core/bin/shared/
* exit-codes.sh` (ADR-3889 Phase 4, #3908) so a shell caller resolves a
* symbolic name instead of hardcoding a literal integer that can silently
* drift from the registry.
*/
function serializeSh(entries, declarationPath) {
const relDeclaration = path.relative(REPO_ROOT, declarationPath).split(path.sep).join('/');
const banner = [
'#!/bin/sh',
'# GENERATED FILE — DO NOT EDIT BY HAND.',
`# Source of truth: ${relDeclaration}. Regenerate with:`,
'# node scripts/gen-exit-code-registry.cjs --write',
'#',
'# One `export EXIT_<NAME>=<code>` per gsd-core/bin/shared/exit-codes.json',
'# entry (ADR-3889 §2, #3905/#3906/#3908). POSIX sh, safe under `set -u`:',
'# sourcing this file only ever ASSIGNS variables, never reads one, so it',
'# cannot trip an unset-variable check regardless of the caller\'s existing',
'# environment.',
'#',
'# Usage (from a scanner under scripts/):',
'# . "$(dirname "$0")/../gsd-core/bin/shared/exit-codes.sh"',
'# exit "$EXIT_UNAVAILABLE"',
'',
].join('\n');
const lines = entries.map((e) => `export EXIT_${e.name}=${e.code}`);
return banner + lines.join('\n') + '\n';
}
/**
* Load, validate, and serialize the declaration in one step.
* @returns {{ok:true,content:string}|{ok:false,reason:string,message:string}}
*/
function buildRegistryContent(declarationPath) {
const loaded = loadDeclaration(declarationPath);
if (!loaded.ok) return loaded;
const validated = validateEntries(loaded.entries);
if (!validated.ok) return validated;
return { ok: true, content: serializeRegistry(loaded.entries, declarationPath), entries: loaded.entries };
}
function printFail(result) {
console.error(`FAIL gen-exit-code-registry: ${result.reason}`);
console.error(` ${result.message}`);
}
/**
* Emit a failure outcome: structured JSON on stdout (and NO stderr prose)
* when `json` is set, otherwise the legacy human-readable stderr report.
* `context` carries the specifics (offending code/name/field/path) that the
* `detail` prose currently embeds, so a `--json` consumer never needs to
* parse prose to recover them — it defaults to `null` for reasons (USAGE,
* DRIFTED, MISSING_ARTIFACT) that carry no structured specifics.
* @param {{reason:string, message?:string, context?:object}} result
* @param {boolean} json
*/
function emitFail(result, json) {
if (json) {
process.stdout.write(JSON.stringify({ ok: false, reason: result.reason, context: result.context ?? null, detail: result.message }) + '\n');
return;
}
printFail(result);
}
/**
* Emit a success outcome: structured JSON on stdout when `json` is set,
* otherwise the legacy human-readable stdout line.
* @param {string} reason
* @param {string} humanMessage
* @param {boolean} json
*/
function emitOk(reason, humanMessage, json) {
if (json) {
process.stdout.write(JSON.stringify({ ok: true, reason }) + '\n');
return;
}
console.log(humanMessage);
}
function doWrite(declarationPath, outPath, scriptsOutPath, hooksOutPath, dtsPath, shPath, json) {
const result = buildRegistryContent(declarationPath);
if (!result.ok) {
emitFail(result, json);
return 1;
}
// The three .cjs/.js artifacts are byte-identical copies of the same
// generated content (serializeRegistry never encodes the output path), so
// the same string is written to all three locations unchanged.
for (const target of [outPath, scriptsOutPath, hooksOutPath]) {
fs.mkdirSync(path.dirname(target), { recursive: true });
fs.writeFileSync(target, result.content, 'utf8');
}
const dtsContent = serializeDts(declarationPath);
fs.mkdirSync(path.dirname(dtsPath), { recursive: true });
fs.writeFileSync(dtsPath, dtsContent, 'utf8');
const shContent = serializeSh(result.entries, declarationPath);
fs.mkdirSync(path.dirname(shPath), { recursive: true });
fs.writeFileSync(shPath, shContent, 'utf8');
emitOk(
REASON.OK,
`ok gen-exit-code-registry: wrote ${outPath}\nok gen-exit-code-registry: wrote ${scriptsOutPath}\n`
+ `ok gen-exit-code-registry: wrote ${hooksOutPath}\n`
+ `ok gen-exit-code-registry: wrote ${dtsPath}\nok gen-exit-code-registry: wrote ${shPath}`,
json,
);
return 0;
}
/**
* Verify one committed artifact against the freshly generated content.
* @returns {{ok:true}|{ok:false,reason:string,message:string,context:object}}
*/
function checkOneArtifact(artifactLabel, artifactPath, content) {
if (!fs.existsSync(artifactPath)) {
return {
ok: false,
reason: REASON.MISSING_ARTIFACT,
message: `${artifactPath} (${artifactLabel}) does not exist. Run:\n node scripts/gen-exit-code-registry.cjs --write`,
context: { artifact: artifactLabel, path: artifactPath },
};
}
const committed = fs.readFileSync(artifactPath, 'utf8');
if (committed !== content) {
return {
ok: false,
reason: REASON.DRIFTED,
message:
`${artifactPath} (${artifactLabel}, ${committed.length} bytes) != freshly generated content (${content.length} bytes)\n\n`
+ 'Regenerate with:\n node scripts/gen-exit-code-registry.cjs --write',
context: { artifact: artifactLabel, path: artifactPath },
};
}
return { ok: true };
}
/**
* --check verifies ALL FIVE committed artifacts against the same freshly
* generated content and fails naming which one drifted (or is missing) if
* any does. Checked in a fixed order (primary, secondary, hooks, dts, sh) so
* a single-artifact failure is always reported deterministically.
*/
function doCheck(declarationPath, outPath, scriptsOutPath, hooksOutPath, dtsPath, shPath, json) {
const result = buildRegistryContent(declarationPath);
if (!result.ok) {
emitFail(result, json);
return 1;
}
const dtsContent = serializeDts(declarationPath);
const shContent = serializeSh(result.entries, declarationPath);
const artifacts = [
['primary', outPath, result.content],
['secondary', scriptsOutPath, result.content],
['hooks', hooksOutPath, result.content],
['dts', dtsPath, dtsContent],
['sh', shPath, shContent],
];
for (const [artifactLabel, artifactPath, content] of artifacts) {
const checked = checkOneArtifact(artifactLabel, artifactPath, content);
if (!checked.ok) {
emitFail(checked, json);
return 1;
}
}
emitOk(
REASON.OK,
`ok gen-exit-code-registry: ${outPath} matches ${declarationPath}\n`
+ `ok gen-exit-code-registry: ${scriptsOutPath} matches ${declarationPath}\n`
+ `ok gen-exit-code-registry: ${hooksOutPath} matches ${declarationPath}\n`
+ `ok gen-exit-code-registry: ${dtsPath} matches ${declarationPath}\n`
+ `ok gen-exit-code-registry: ${shPath} matches ${declarationPath}`,
json,
);
return 0;
}
/**
* @returns {{mode:'write'|'check', declarationPath:?string, outPath:?string, scriptsOutPath:?string, hooksOutPath:?string, dtsPath:?string, shPath:?string, json:boolean}}
*/
function parseArgs(argv) {
let mode = null;
let declarationPath = null;
let outPath = null;
let scriptsOutPath = null;
let hooksOutPath = null;
let dtsPath = null;
let shPath = null;
let json = false;
for (let i = 0; i < argv.length; i++) {
const arg = argv[i];
if (arg === '--write' || arg === '--check') {
if (mode !== null) {
throw new Error(`conflicting mode flags: --${mode} and ${arg}`);
}
mode = arg === '--write' ? 'write' : 'check';
} else if (arg === '--json') {
json = true;
} else if (arg === '--declaration') {
const value = argv[++i];
if (value === undefined) throw new Error('--declaration requires a value');
declarationPath = value;
} else if (arg.startsWith('--declaration=')) {
declarationPath = arg.slice('--declaration='.length);
} else if (arg === '--out') {
const value = argv[++i];
if (value === undefined) throw new Error('--out requires a value');
outPath = value;
} else if (arg.startsWith('--out=')) {
outPath = arg.slice('--out='.length);
} else if (arg === '--scripts-out') {
const value = argv[++i];
if (value === undefined) throw new Error('--scripts-out requires a value');
scriptsOutPath = value;
} else if (arg.startsWith('--scripts-out=')) {
scriptsOutPath = arg.slice('--scripts-out='.length);
} else if (arg === '--hooks-out') {
const value = argv[++i];
if (value === undefined) throw new Error('--hooks-out requires a value');
hooksOutPath = value;
} else if (arg.startsWith('--hooks-out=')) {
hooksOutPath = arg.slice('--hooks-out='.length);
} else if (arg === '--dts-out') {
const value = argv[++i];
if (value === undefined) throw new Error('--dts-out requires a value');
dtsPath = value;
} else if (arg.startsWith('--dts-out=')) {
dtsPath = arg.slice('--dts-out='.length);
} else if (arg === '--sh-out') {
const value = argv[++i];
if (value === undefined) throw new Error('--sh-out requires a value');
shPath = value;
} else if (arg.startsWith('--sh-out=')) {
shPath = arg.slice('--sh-out='.length);
} else {
throw new Error(`unrecognized argument: ${arg}`);
}
}
return { mode: mode || 'write', declarationPath, outPath, scriptsOutPath, hooksOutPath, dtsPath, shPath, json };
}
function main() {
// --json must be honored even on a parse failure (e.g. an unrecognized
// flag alongside --json), so it is detected from the raw argv rather
// than from parseArgs's return value, which may never be produced.
const rawArgv = process.argv.slice(2);
const jsonRequested = rawArgv.includes('--json');
let args;
try {
args = parseArgs(rawArgv);
} catch (err) {
emitFail({ reason: REASON.USAGE, message: jsonRequested ? err.message : `${err.message}\n${USAGE_MESSAGE}` }, jsonRequested);
return 1;
}
const declarationPath = args.declarationPath || DEFAULT_DECLARATION_PATH;
const outPath = args.outPath || DEFAULT_OUTPUT_PATH;
const scriptsOutPath = args.scriptsOutPath || DEFAULT_SCRIPTS_OUTPUT_PATH;
const hooksOutPath = args.hooksOutPath || DEFAULT_HOOKS_OUTPUT_PATH;
const dtsPath = args.dtsPath || DEFAULT_DTS_OUTPUT_PATH;
const shPath = args.shPath || DEFAULT_SH_OUTPUT_PATH;
return args.mode === 'check'
? doCheck(declarationPath, outPath, scriptsOutPath, hooksOutPath, dtsPath, shPath, args.json)
: doWrite(declarationPath, outPath, scriptsOutPath, hooksOutPath, dtsPath, shPath, args.json);
}
if (require.main === module) process.exitCode = main();
/**
* Classify a single code into one of the band categories the docs page
* renders a row for. Reads the SAME `bandEntryFor`/BANDS table that
* `isAllocatableCode`/`bandFor` are themselves derived from — there is no
* second, independently-typed band boundary anywhere in this classification,
* so widening or narrowing a band (editing a `test` in BANDS) changes what
* this returns too, with nothing else to keep in sync.
* @param {number} code
* @returns {'free'|'hook-only'|'node-reserved'|'outside-every-band'|'generic'|'domain'|'shell-signal'}
*/
function classifyBand(code) {
const band = bandEntryFor(code);
return band ? band.category : 'outside-every-band'; // 14-63, 79
}
/**
* Scan the code space [0, maxCode] and group it into maximal contiguous
* runs of the same classifyBand() category, in the order those categories
* first appear. The run touching `maxCode` is marked `openEnded: true` for
* any category whose classification never changes past that point
* (currently only 'shell-signal', since bandFor(code >= 126) is constant),
* so the docs renderer can print it as `126+` instead of a false upper
* bound. This is what makes the docs page's band table a DERIVED artifact:
* widening a band in isAllocatableCode/bandFor changes what this function
* returns, which changes the rendered table, with no second literal to
* keep in sync.
* @param {number} maxCode
* @returns {Array<{category:string, ranges:Array<{start:number,end:number,openEnded:boolean}>}>}
*/
function computeBandRanges(maxCode) {
/** @type {Map<string, Array<{start:number,end:number,openEnded:boolean}>>} */
const byCategory = new Map();
const order = [];
let runCategory = null;
let runStart = null;
for (let code = 0; code <= maxCode; code += 1) {
const category = classifyBand(code);
if (category !== runCategory) {
if (runCategory !== null) {
pushRun(byCategory, order, runCategory, runStart, code - 1, false);
}
runCategory = category;
runStart = code;
}
}
// Close the final run. It is open-ended (unbounded above) exactly when its
// category classification is constant for every code beyond maxCode too —
// true today only for 'shell-signal', since bandFor treats every code
// >= 126 identically with no further upper boundary.
const openEnded = classifyBand(maxCode) === classifyBand(maxCode + 1);
pushRun(byCategory, order, runCategory, runStart, maxCode, openEnded);
return order.map((category) => ({ category, ranges: byCategory.get(category) }));
}
function pushRun(byCategory, order, category, start, end, openEnded) {
if (!byCategory.has(category)) {
byCategory.set(category, []);
order.push(category);
}
byCategory.get(category).push({ start, end, openEnded });
}
module.exports = {
REASON,
USAGE_MESSAGE,
DEFAULT_DECLARATION_PATH,
DEFAULT_OUTPUT_PATH,
DEFAULT_SCRIPTS_OUTPUT_PATH,
DEFAULT_HOOKS_OUTPUT_PATH,
DEFAULT_DTS_OUTPUT_PATH,
DEFAULT_SH_OUTPUT_PATH,
ENTRY_FIELD_TYPES,
BANDS,
bandEntryFor,
isAllocatableCode,
bandFor,
classifyBand,
computeBandRanges,
hasForbiddenDeclarationChar,
validateEntry,
validateEntries,
loadDeclaration,
serializeRegistry,
serializeDts,
serializeSh,
buildRegistryContent,
parseArgs,
main,
};