mirror of
https://github.com/affaan-m/ECC.git
synced 2026-10-14 12:15:29 +02:00
373 lines
12 KiB
JavaScript
373 lines
12 KiB
JavaScript
'use strict';
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const fs = require('fs');
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const path = require('path');
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const { appendFile, ensureDir } = require('../utils');
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const VERSION_DIRECTORY_NAME = '.versions';
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const EVOLUTION_DIRECTORY_NAME = '.evolution';
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const EVOLUTION_LOG_TYPES = Object.freeze([
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'observations',
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'inspections',
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'amendments',
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]);
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function normalizeSkillDir(skillPath) {
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if (!skillPath || typeof skillPath !== 'string') {
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throw new Error('skillPath is required');
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}
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const resolvedPath = path.resolve(skillPath);
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if (path.basename(resolvedPath) === 'SKILL.md') {
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return path.dirname(resolvedPath);
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}
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return resolvedPath;
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}
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function getSkillFilePath(skillPath) {
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return path.join(normalizeSkillDir(skillPath), 'SKILL.md');
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}
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function ensureSkillExists(skillPath) {
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const skillFilePath = getSkillFilePath(skillPath);
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if (!fs.existsSync(skillFilePath)) {
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throw new Error(`Skill file not found: ${skillFilePath}`);
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}
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return skillFilePath;
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}
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function getVersionsDir(skillPath) {
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return path.join(normalizeSkillDir(skillPath), VERSION_DIRECTORY_NAME);
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}
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function getEvolutionDir(skillPath) {
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return path.join(normalizeSkillDir(skillPath), EVOLUTION_DIRECTORY_NAME);
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}
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function getEvolutionLogPath(skillPath, logType) {
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if (!EVOLUTION_LOG_TYPES.includes(logType)) {
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throw new Error(`Unknown evolution log type: ${logType}`);
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}
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return path.join(getEvolutionDir(skillPath), `${logType}.jsonl`);
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}
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function ensureSkillVersioning(skillPath) {
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ensureSkillExists(skillPath);
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const versionsDir = getVersionsDir(skillPath);
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const evolutionDir = getEvolutionDir(skillPath);
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ensureDir(versionsDir);
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ensureDir(evolutionDir);
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for (const logType of EVOLUTION_LOG_TYPES) {
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const logPath = getEvolutionLogPath(skillPath, logType);
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if (!fs.existsSync(logPath)) {
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fs.writeFileSync(logPath, '', 'utf8');
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}
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}
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return {
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versionsDir,
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evolutionDir,
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};
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}
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function parseVersionNumber(fileName) {
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const match = /^v(\d+)\.md$/.exec(fileName);
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if (!match) {
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return null;
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}
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const version = Number(match[1]);
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return Number.isSafeInteger(version) && version >= 1 ? version : null;
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}
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function listVersions(skillPath) {
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const versionsDir = getVersionsDir(skillPath);
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if (!fs.existsSync(versionsDir)) {
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return [];
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}
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return fs.readdirSync(versionsDir)
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.map(fileName => {
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const version = parseVersionNumber(fileName);
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if (version === null) {
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return null;
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}
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const filePath = path.join(versionsDir, fileName);
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let stats;
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try {
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stats = fs.statSync(filePath);
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} catch (error) {
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// A dangling link still occupies a path, but is not a readable snapshot.
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if (error.code === 'ENOENT') return null;
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throw error;
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}
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if (!stats.isFile()) {
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return null;
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}
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return {
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version,
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path: filePath,
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created_at: stats.mtime.toISOString(),
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};
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})
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.filter(Boolean)
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.sort((left, right) => left.version - right.version);
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}
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function getCurrentVersion(skillPath) {
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const skillFilePath = getSkillFilePath(skillPath);
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if (!fs.existsSync(skillFilePath)) {
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return 0;
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}
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const versions = listVersions(skillPath);
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if (versions.length === 0) {
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return 1;
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}
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return versions[versions.length - 1].version;
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}
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function appendEvolutionRecord(skillPath, logType, record) {
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ensureSkillVersioning(skillPath);
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appendFile(getEvolutionLogPath(skillPath, logType), `${JSON.stringify(record)}\n`);
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return { ...record };
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}
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function readJsonl(filePath) {
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if (!fs.existsSync(filePath)) {
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return [];
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}
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return fs.readFileSync(filePath, 'utf8')
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.split('\n')
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.map(line => line.trim())
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.filter(Boolean)
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.reduce((rows, line) => {
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try {
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const record = JSON.parse(line);
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if (record && typeof record === 'object' && !Array.isArray(record)) {
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rows.push(record);
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}
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} catch {
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// Ignore malformed rows so the log remains append-only and resilient.
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}
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return rows;
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}, []);
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}
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function getEvolutionLog(skillPath, logType) {
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return readJsonl(getEvolutionLogPath(skillPath, logType));
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}
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function allocateSnapshotVersion(skillPath) {
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const versions = listVersions(skillPath);
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const versionsDir = getVersionsDir(skillPath);
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const occupiedPaths = new Set(fs.existsSync(versionsDir) ? fs.readdirSync(versionsDir) : []);
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let nextVersion = versions.length === 0 ? 1 : versions[versions.length - 1].version + 1;
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// Listing excludes non-files, but their paths remain user-owned and occupied.
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while (Number.isSafeInteger(nextVersion) && occupiedPaths.has(`v${nextVersion}.md`)) {
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nextVersion += 1;
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}
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if (!Number.isSafeInteger(nextVersion)) {
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throw new Error('Skill snapshot version range is exhausted; safe integer allocation is unavailable; existing snapshots were preserved');
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}
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return nextVersion;
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}
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function removeOwnedSnapshot(snapshot) {
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let current;
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try {
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current = fs.lstatSync(snapshot.path);
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} catch (error) {
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if (error.code === 'ENOENT') return;
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throw error;
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}
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if (!current.isFile() || current.dev !== snapshot.identity.dev || current.ino !== snapshot.identity.ino) {
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throw new Error('Snapshot path changed ownership; replacement was preserved');
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}
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fs.unlinkSync(snapshot.path);
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}
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function failSnapshotAttempt(snapshot, primaryError) {
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try {
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removeOwnedSnapshot(snapshot);
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} catch (recoveryError) {
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const error = new Error(`${primaryError.message}; snapshot cleanup failed: ${recoveryError.message}; recovery is pending`, { cause: primaryError });
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error.primaryError = primaryError;
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error.recoveryError = recoveryError;
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throw error;
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}
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throw primaryError;
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}
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function removeOwnedStaging(staging, contentIdentity) {
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const directory = fs.lstatSync(staging.path);
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if (!directory.isDirectory() || directory.dev !== staging.identity.dev || directory.ino !== staging.identity.ino) {
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throw new Error('Snapshot staging directory changed ownership; replacement was preserved');
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}
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let content;
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try {
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content = fs.lstatSync(staging.contentPath);
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} catch (error) {
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if (error.code !== 'ENOENT') throw error;
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}
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if (content) {
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if (!contentIdentity || !content.isFile() || content.dev !== contentIdentity.dev || content.ino !== contentIdentity.ino) {
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throw new Error('Snapshot staging content ownership could not be verified; content was preserved');
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}
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fs.unlinkSync(staging.contentPath);
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}
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// Unexpected entries remain owned by their writers. Empty-directory removal is safe.
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fs.rmdirSync(staging.path);
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}
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function prepareStaging(versionsDir) {
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const stagingDir = fs.mkdtempSync(path.join(versionsDir, '.snapshot-'));
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try {
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return { path: stagingDir, contentPath: path.join(stagingDir, 'content.md'), identity: fs.lstatSync(stagingDir) };
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} catch (primaryError) {
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const recoveryError = new Error(`Staging directory identity could not be verified; preserved ${stagingDir}`);
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const error = new Error(`${primaryError.message}; ${recoveryError.message}; recovery is pending`, { cause: primaryError });
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error.primaryError = primaryError;
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error.recoveryError = recoveryError;
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throw error;
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}
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}
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function publishVersion(skillPath, skillContent, options) {
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ensureSkillExists(skillPath);
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const nextVersion = allocateSnapshotVersion(skillPath);
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const versionsDir = getVersionsDir(skillPath);
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ensureSkillVersioning(skillPath);
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const staging = prepareStaging(versionsDir);
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const stagedPath = staging.contentPath;
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const snapshotPath = path.join(versionsDir, `v${nextVersion}.md`);
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const createdAt = options.timestamp || new Date().toISOString();
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let snapshot;
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let published = false;
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try {
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const descriptor = fs.openSync(stagedPath, 'wx');
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try {
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snapshot = { version: nextVersion, path: snapshotPath, created_at: createdAt, identity: fs.fstatSync(descriptor) };
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fs.writeFileSync(descriptor, skillContent, 'utf8');
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} finally {
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fs.closeSync(descriptor);
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}
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// Exclusive linking publishes fully written bytes without replacing occupied paths.
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fs.linkSync(stagedPath, snapshotPath);
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published = true;
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removeOwnedStaging(staging, snapshot.identity);
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return snapshot;
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} catch (primaryError) {
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try {
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if (published) removeOwnedSnapshot(snapshot);
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removeOwnedStaging(staging, snapshot?.identity);
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} catch (recoveryError) {
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const error = new Error(`${primaryError.message}; publication cleanup failed: ${recoveryError.message}; recovery is pending`, { cause: primaryError });
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error.primaryError = primaryError;
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error.recoveryError = recoveryError;
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throw error;
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}
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throw primaryError;
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}
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}
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function recordSnapshot(skillPath, snapshot, options) {
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appendEvolutionRecord(skillPath, 'amendments', {
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event: 'snapshot',
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version: snapshot.version,
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reason: options.reason || null,
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author: options.author || null,
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status: 'applied',
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created_at: snapshot.created_at,
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});
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return { version: snapshot.version, path: snapshot.path, created_at: snapshot.created_at };
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}
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function createVersion(skillPath, options = {}) {
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const skillFilePath = ensureSkillExists(skillPath);
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const skillContent = fs.readFileSync(skillFilePath, 'utf8');
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return recordSnapshot(skillPath, publishVersion(skillPath, skillContent, options), options);
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}
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function rollbackTo(skillPath, targetVersion, options = {}) {
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const normalizedTargetVersion = Number(targetVersion);
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if (!Number.isSafeInteger(normalizedTargetVersion) || normalizedTargetVersion <= 0) {
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throw new Error(`Invalid target version: ${targetVersion}`);
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}
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ensureSkillExists(skillPath);
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const targetPath = path.join(getVersionsDir(skillPath), `v${normalizedTargetVersion}.md`);
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if (!fs.existsSync(targetPath)) {
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throw new Error(`Version not found: v${normalizedTargetVersion}`);
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}
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const priorContent = fs.readFileSync(getSkillFilePath(skillPath));
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const currentVersion = getCurrentVersion(skillPath);
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const targetContent = fs.readFileSync(targetPath, 'utf8');
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// Publish the restored-content snapshot before replacing unsnapshotted live work.
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// Initialization and exclusive publication failures therefore leave SKILL.md intact.
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const snapshotOptions = {
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timestamp: options.timestamp,
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reason: options.reason || `rollback to v${normalizedTargetVersion}`,
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author: options.author || null,
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};
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const snapshot = publishVersion(skillPath, targetContent, snapshotOptions);
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try {
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fs.writeFileSync(getSkillFilePath(skillPath), targetContent, 'utf8');
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} catch (primaryError) {
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try {
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if (!fs.readFileSync(getSkillFilePath(skillPath)).equals(priorContent)) {
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throw new Error('Live skill changed during the failed write; target snapshot retained');
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}
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} catch (recoveryError) {
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const error = new Error(`${primaryError.message}; ${recoveryError.message}; recovery is pending`, { cause: primaryError });
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error.primaryError = primaryError;
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error.recoveryError = recoveryError;
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throw error;
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}
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failSnapshotAttempt(snapshot, primaryError);
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}
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const createdVersion = recordSnapshot(skillPath, snapshot, snapshotOptions);
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appendEvolutionRecord(skillPath, 'amendments', {
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event: 'rollback',
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version: createdVersion.version,
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source_version: currentVersion,
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target_version: normalizedTargetVersion,
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reason: options.reason || null,
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author: options.author || null,
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status: 'applied',
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created_at: options.timestamp || new Date().toISOString(),
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});
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return createdVersion;
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}
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module.exports = {
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EVOLUTION_DIRECTORY_NAME,
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EVOLUTION_LOG_TYPES,
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VERSION_DIRECTORY_NAME,
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appendEvolutionRecord,
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createVersion,
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ensureSkillVersioning,
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getCurrentVersion,
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getEvolutionDir,
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getEvolutionLog,
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getEvolutionLogPath,
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getVersionsDir,
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listVersions,
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rollbackTo,
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};
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