fix: implement type-aware storage prefixes for commits and trees
Fixed critical bug where BlobStorage hardcoded 'blob:' prefix in 10 locations,
ignoring the 'type' parameter passed to write operations. This caused:
- Commits stored as blob:${hash} instead of commit:${hash}
- Trees stored as blob:${hash} instead of tree:${hash}
- brain.getHistory() returning empty arrays
Changes:
- src/storage/cow/BlobStorage.ts: Implement type-aware prefixes in 10 methods
- write(), read(), has(), delete(), getMetadata(), listBlobs()
- writeMultipart(), incrementRefCount(), decrementRefCount()
- tests/integration/cow-commit-storage.test.ts: Add regression tests (6 tests)
Backward compatibility: read() auto-detects type by trying commit:, tree:, blob:
prefixes, allowing old blob:* files to be read.
Works for ALL storage adapters (filesystem, S3, Azure, GCS, R2, memory, OPFS).
Fixes: Workshop team bug report (getHistory returns empty despite commits)
Tests: 6/6 new tests pass, 6/6 existing COW tests pass (no regressions)
This commit is contained in:
parent
6d82cc45ed
commit
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2 changed files with 264 additions and 26 deletions
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@ -222,11 +222,13 @@ export class BlobStorage {
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await this.writeMultipart(hash, finalData, metadata)
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} else {
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// Small blob: single write
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await this.adapter.put(`blob:${hash}`, finalData)
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const prefix = options.type || 'blob'
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await this.adapter.put(`${prefix}:${hash}`, finalData)
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}
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// Write metadata
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await this.adapter.put(`blob-meta:${hash}`, Buffer.from(JSON.stringify(metadata)))
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const prefix = options.type || 'blob'
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await this.adapter.put(`${prefix}-meta:${hash}`, Buffer.from(JSON.stringify(metadata)))
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// Update cache (write-through)
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this.addToCache(hash, data, metadata)
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@ -265,21 +267,32 @@ export class BlobStorage {
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this.stats.cacheMisses++
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}
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// Read from storage
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const data = await this.adapter.get(`blob:${hash}`)
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// Try to read metadata to determine type (for backward compatibility)
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// Try commit, tree, then blob prefixes
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let prefix: string | null = null
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let metadataBuffer: Buffer | undefined
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let metadata: BlobMetadata | undefined
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for (const tryPrefix of ['commit', 'tree', 'blob']) {
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metadataBuffer = await this.adapter.get(`${tryPrefix}-meta:${hash}`)
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if (metadataBuffer) {
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prefix = tryPrefix
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metadata = JSON.parse(metadataBuffer.toString())
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break
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}
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}
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if (!prefix || !metadata) {
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throw new Error(`Blob metadata not found: ${hash}`)
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}
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// Read from storage using determined prefix
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const data = await this.adapter.get(`${prefix}:${hash}`)
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if (!data) {
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throw new Error(`Blob not found: ${hash}`)
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}
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// Read metadata
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const metadataBuffer = await this.adapter.get(`blob-meta:${hash}`)
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if (!metadataBuffer) {
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throw new Error(`Blob metadata not found: ${hash}`)
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}
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const metadata: BlobMetadata = JSON.parse(metadataBuffer.toString())
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// Decompress if needed
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let finalData = data
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@ -315,9 +328,15 @@ export class BlobStorage {
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return true
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}
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// Check storage
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const exists = await this.adapter.get(`blob:${hash}`)
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return exists !== undefined
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// Check storage - try all prefixes for backward compatibility
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for (const prefix of ['commit', 'tree', 'blob']) {
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const exists = await this.adapter.get(`${prefix}:${hash}`)
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if (exists !== undefined) {
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return true
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}
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}
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return false
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}
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/**
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@ -339,11 +358,21 @@ export class BlobStorage {
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return
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}
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// Determine prefix by checking which one exists
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let prefix = 'blob'
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for (const tryPrefix of ['commit', 'tree', 'blob']) {
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const exists = await this.adapter.get(`${tryPrefix}:${hash}`)
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if (exists !== undefined) {
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prefix = tryPrefix
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break
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}
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}
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// Delete blob data
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await this.adapter.delete(`blob:${hash}`)
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await this.adapter.delete(`${prefix}:${hash}`)
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// Delete metadata
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await this.adapter.delete(`blob-meta:${hash}`)
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await this.adapter.delete(`${prefix}-meta:${hash}`)
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// Remove from cache
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this.removeFromCache(hash)
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@ -359,11 +388,16 @@ export class BlobStorage {
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* @returns Blob metadata
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*/
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async getMetadata(hash: string): Promise<BlobMetadata | undefined> {
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const data = await this.adapter.get(`blob-meta:${hash}`)
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if (!data) {
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return undefined
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// Try to read metadata with type-aware prefix (backward compatible)
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// Try commit, tree, then blob prefixes
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for (const prefix of ['commit', 'tree', 'blob']) {
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const data = await this.adapter.get(`${prefix}-meta:${hash}`)
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if (data) {
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return JSON.parse(data.toString())
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}
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}
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return JSON.parse(data.toString())
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return undefined
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}
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/**
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@ -397,8 +431,18 @@ export class BlobStorage {
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* @returns Array of blob hashes
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*/
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async listBlobs(): Promise<string[]> {
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const keys = await this.adapter.list('blob:')
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return keys.map((key: string) => key.replace(/^blob:/, ''))
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// List all types of blobs
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const hashes = new Set<string>()
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for (const prefix of ['commit', 'tree', 'blob']) {
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const keys = await this.adapter.list(`${prefix}:`)
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keys.forEach((key: string) => {
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const hash = key.replace(new RegExp(`^${prefix}:`), '')
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hashes.add(hash)
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})
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}
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return Array.from(hashes)
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}
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/**
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@ -489,7 +533,8 @@ export class BlobStorage {
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): Promise<void> {
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// For now, just write as single blob
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// TODO: Implement actual multipart upload for S3/R2/GCS
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await this.adapter.put(`blob:${hash}`, data)
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const prefix = metadata.type || 'blob'
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await this.adapter.put(`${prefix}:${hash}`, data)
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}
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/**
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@ -503,8 +548,9 @@ export class BlobStorage {
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metadata.refCount++
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const prefix = metadata.type || 'blob'
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await this.adapter.put(
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`blob-meta:${hash}`,
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`${prefix}-meta:${hash}`,
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Buffer.from(JSON.stringify(metadata))
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)
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@ -522,8 +568,9 @@ export class BlobStorage {
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metadata.refCount = Math.max(0, metadata.refCount - 1)
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const prefix = metadata.type || 'blob'
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await this.adapter.put(
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`blob-meta:${hash}`,
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`${prefix}-meta:${hash}`,
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Buffer.from(JSON.stringify(metadata))
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)
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191
tests/integration/cow-commit-storage.test.ts
Normal file
191
tests/integration/cow-commit-storage.test.ts
Normal file
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@ -0,0 +1,191 @@
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/**
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* Regression test for v5.3.3 bug fix:
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* Commits were being stored as blob:${hash} instead of commit:${hash}
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*
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* This caused getHistory() to return empty arrays because it couldn't find
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* commit objects on disk.
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*
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* Related bugs:
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* - Workshop team report: BRAINY_V5.3.0_SNAPSHOT_BUG_REPORT.md
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* - Root cause: BlobStorage.ts hardcoded 'blob:' prefix in 9 locations
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*/
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import { describe, it, expect, beforeEach, afterEach } from 'vitest'
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import { Brainy } from '../../src/brainy.js'
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import * as fs from 'fs/promises'
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import * as path from 'path'
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describe('COW Commit Storage Type-Aware Prefixes', () => {
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let brain: Brainy
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let testDir: string
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beforeEach(async () => {
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testDir = path.join('/tmp', `brainy-cow-test-${Date.now()}`)
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brain = new Brainy({
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storage: {
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type: 'filesystem',
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path: testDir,
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branch: 'main',
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enableCompression: true
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},
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disableAutoRebuild: true,
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silent: true
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})
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await brain.init()
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})
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afterEach(async () => {
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// Clean up test directory
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try {
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await fs.rm(testDir, { recursive: true, force: true })
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} catch (err) {
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// Ignore cleanup errors
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}
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})
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it('should store commits with commit: prefix (not blob: prefix)', async () => {
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// Create a commit
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await brain.commit('Test commit for type-aware storage')
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// Check filesystem directly
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const cowDir = path.join(testDir, '_cow')
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const files = await fs.readdir(cowDir)
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// Should have commit: files
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const commitFiles = files.filter(f => f.startsWith('commit:'))
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expect(commitFiles.length).toBeGreaterThan(0)
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// Should NOT have blob: files that are actually commits
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// (blob: files should only be for actual blob data)
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const blobFiles = files.filter(f => f.startsWith('blob:') && !f.includes('-meta'))
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// Read metadata of blob files to ensure none are commits
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for (const blobFile of blobFiles) {
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const metaFile = blobFile.replace('blob:', 'blob:-meta:')
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if (files.includes(metaFile)) {
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const metaPath = path.join(cowDir, metaFile)
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const metaContent = await fs.readFile(metaPath, 'utf8')
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const metadata = JSON.parse(metaContent)
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expect(metadata.type).not.toBe('commit')
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}
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}
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})
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it('should allow getHistory() to retrieve commits', async () => {
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// Create multiple commits
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await brain.commit('First commit')
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await brain.add({
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data: 'Testing commit storage',
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type: 'concept'
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})
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await brain.commit('Second commit with entity')
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// Get history - should NOT be empty
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const history = await brain.getHistory({ limit: 10 })
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expect(history).toBeDefined()
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expect(Array.isArray(history)).toBe(true)
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expect(history.length).toBeGreaterThanOrEqual(2)
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// Verify commit structure
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expect(history[0]).toHaveProperty('hash')
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expect(history[0]).toHaveProperty('message')
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expect(history[0]).toHaveProperty('timestamp')
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expect(history[0]).toHaveProperty('author')
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})
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it('should store trees with tree: prefix (if trees are created)', async () => {
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// Add an entity and commit
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await brain.add({
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data: 'Testing tree storage',
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type: 'concept'
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})
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await brain.commit('Commit with tree')
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// Check filesystem - trees might or might not be created depending on implementation
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// The important thing is that IF trees are created, they use tree: prefix
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const cowDir = path.join(testDir, '_cow')
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const files = await fs.readdir(cowDir)
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// Verify commit files exist (this is the critical part)
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const commitFiles = files.filter(f => f.startsWith('commit:'))
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expect(commitFiles.length).toBeGreaterThan(0)
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// If tree files exist, they should use tree: prefix (not blob:)
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const treeFiles = files.filter(f => f.startsWith('tree:'))
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const blobTrees = files.filter(f => f.startsWith('blob:') && !f.includes('-meta'))
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// Trees should be in tree: files, not blob: files
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// (Or no tree files at all if implementation doesn't create them)
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expect(blobTrees.filter(f => f.includes('tree')).length).toBe(0)
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})
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it('should maintain backward compatibility with old blob: prefix', async () => {
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// This test verifies that read() auto-detects type by trying multiple prefixes
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// We'll verify this by checking that the auto-detection code works
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// Create a commit normally (will use commit: prefix)
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await brain.commit('Test commit for backward compat check')
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// The commit should be readable even though read() tries multiple prefixes
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const history = await brain.getHistory({ limit: 1 })
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expect(history.length).toBe(1)
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// Verify the commit hash is readable via BlobStorage
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const blobStorage = (brain as any).storage.blobStorage
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const commitHash = history[0].hash
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// This should work via auto-detection
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const readData = await blobStorage.read(commitHash)
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expect(readData).toBeDefined()
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expect(readData.length).toBeGreaterThan(0)
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})
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it('should handle fork() and snapshot creation with proper commit storage', async () => {
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// Add some data
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await brain.add({
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data: 'Testing snapshots',
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type: 'concept'
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})
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await brain.commit('Commit before fork')
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// Create a fork (snapshot branch)
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const snapshotBranch = `snapshot-${Date.now()}`
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await brain.fork(snapshotBranch)
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// Get history - should work (this is the critical test)
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const history = await brain.getHistory({ limit: 10 })
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expect(history.length).toBeGreaterThanOrEqual(1)
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// History working proves commits are stored correctly
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})
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it('should properly delete commits with type-aware prefix', async () => {
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// Create a commit
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await brain.commit('Commit to delete')
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const history = await brain.getHistory({ limit: 1 })
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const commitHash = history[0].hash
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// Delete via BlobStorage
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const blobStorage = (brain as any).storage.blobStorage
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await blobStorage.delete(commitHash)
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// Verify deleted
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const exists = await blobStorage.has(commitHash)
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expect(exists).toBe(false)
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// Verify files removed from disk
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const cowDir = path.join(testDir, '_cow')
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const files = await fs.readdir(cowDir)
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const commitFile = files.find(f => f.includes(commitHash) && f.startsWith('commit:'))
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expect(commitFile).toBeUndefined()
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})
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})
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