51 lines
1.8 KiB
TypeScript
51 lines
1.8 KiB
TypeScript
/** Git-blob operations owned by the bilingual pairing workflow. */
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import { spawnSync } from 'node:child_process'
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import { createHash } from 'node:crypto'
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const SNAPSHOT_REF_PREFIX = 'refs/dsh/translation-pairing/snapshots'
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/** Full SHA-1 Git blob hash (the 40-hex format used by pairing records). */
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export function gitBlobHash(content: Buffer): string {
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const hash = createHash('sha1')
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hash.update(`blob ${content.byteLength}\0`)
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hash.update(content)
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return hash.digest('hex')
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}
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function runGit(root: string, args: string[], operation: string, input?: Buffer): Buffer {
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const result = spawnSync('git', ['-C', root, ...args], {
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input,
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maxBuffer: 1 << 26,
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})
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if (result.error) {
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throw new Error(`${operation} failed: ${result.error.message}`, { cause: result.error })
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}
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if (result.status !== 0) {
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throw new Error(`${operation} failed with status ${String(result.status)}: ${result.stderr.toString('utf8').trim()}`)
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}
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return result.stdout
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}
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/**
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* Persist exact working-tree bytes so a pairing record can later recover them
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* with `git cat-file`, even when they have never appeared in the index or a
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* commit. The returned object ID is checked against the pairing format's own
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* content hash before the caller writes a sidecar.
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*/
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export function storeGitBlob(root: string, content: Buffer): string {
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const expected = gitBlobHash(content)
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const stored = runGit(root, ['hash-object', '-w', '--stdin'], 'git hash-object -w --stdin', content)
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.toString('utf8')
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.trim()
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if (stored !== expected) {
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throw new Error(`git hash-object -w --stdin returned unexpected object ID ${JSON.stringify(stored)}; expected ${expected}`)
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}
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runGit(
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root,
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['update-ref', `${SNAPSHOT_REF_PREFIX}/${stored}`, stored],
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'git update-ref for translation snapshot',
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)
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return stored
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}
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