bare-operating-system/packages/bare-os-coreutils/test/xattr-acl-utils.test.mjs

/**
 * getfacl / setfacl / xattr against an in-memory vfs stub.
 */
import { readFile } from 'node:fs/promises'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import test from 'brittle'
import b4a from 'b4a'

const __dirname = path.dirname(fileURLToPath(import.meta.url))

const AsyncFunction = Object.getPrototypeOf(async function () {}).constructor

/**
 * @param {string} name
 */
async function loadBin(name) {
  const runtime = await readFile(
    path.join(__dirname, '../lib/runtime.js'),
    'utf8'
  )
  const body = await readFile(
    path.join(__dirname, `../src/${name}.js`),
    'utf8'
  )
  return new AsyncFunction(
    'ctx',
    'argv',
    `${runtime}\n${body}\nif (typeof run === 'function') return await run(ctx, argv)\n`
  )
}

function createCtx(store) {
  const logs = []
  const errs = []
  return {
    b4a,
    exitCode: 0,
    shellStdin: '',
    console: {
      log: (m) => logs.push(String(m)),
      error: (m) => errs.push(String(m))
    },
    vfs: {
      async stat(p) {
        if (!Object.prototype.hasOwnProperty.call(store.files, p)) return null
        return store.files[p].stat
      },
      async readFile(p) {
        const ent = store.files[p]
        if (!ent) return null
        return ent.body
      },
      async writeFile(p, body) {
        store.files[p] = {
          stat: { mode: 0o644, type: 'file', mtimeMs: Date.now() },
          body: body instanceof Uint8Array ? body : b4a.from(body)
        }
      },
      async unlink(p) {
        delete store.files[p]
      }
    },
    _logs: logs,
    _errs: errs
  }
}

test('getfacl synthesizes mode triples and reads sidecar', async (t) => {
  const store = {
    files: {
      '/a': {
        stat: { mode: 0o755, type: 'file', mtimeMs: 1 },
        body: null
      },
      '/b': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: null
      },
      '/b.bare_acl': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: b4a.from('user::rw-\n')
      }
    }
  }
  const runA = await loadBin('getfacl')
  const ctxA = createCtx(store)
  await runA(ctxA, ['getfacl', '-c', '/a'])
  t.is(ctxA.exitCode, 0)
  t.is(ctxA._logs.join('\n'), 'user::rwx\ngroup::r-x\nother::r-x')

  const runB = await loadBin('getfacl')
  const ctxB = createCtx(store)
  await runB(ctxB, ['getfacl', '/b'])
  t.is(ctxB.exitCode, 0)
  t.ok(ctxB._logs[0].includes('user::rw-'))
})

test('getfacl documents mask-style sidecars for VFS enforcement', async (t) => {
  const store = {
    files: {
      '/c': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: null
      },
      '/c.bare_acl': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: b4a.from('user::rw-\nother::---\n')
      }
    }
  }
  const run = await loadBin('getfacl')
  const ctx = createCtx(store)
  await run(ctx, ['getfacl', '-c', '/c'])
  t.is(ctx.exitCode, 0)
  t.ok(ctx._logs.join('\n').includes('other::---'))
})

test('setfacl -b and stdin write', async (t) => {
  const store = {
    files: {
      '/x': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: null
      },
      '/x.bare_acl': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: b4a.from('old\n')
      }
    }
  }
  const runClear = await loadBin('setfacl')
  const ctx1 = createCtx(store)
  await runClear(ctx1, ['setfacl', '-b', '/x'])
  t.is(ctx1.exitCode, 0)
  t.absent(store.files['/x.bare_acl'])

  const runSet = await loadBin('setfacl')
  const ctx2 = createCtx(store)
  ctx2.shellStdin = 'user::r--\n'
  await runSet(ctx2, ['setfacl', '/x'])
  t.is(ctx2.exitCode, 0)
  t.is(b4a.toString(store.files['/x.bare_acl'].body), 'user::r--\n')
})

test('xattr -w -l -d round trip', async (t) => {
  const store = {
    files: {
      '/f': {
        stat: { mode: 0o644, type: 'file', mtimeMs: 1 },
        body: null
      }
    }
  }
  const runW = await loadBin('xattr')
  const ctxW = createCtx(store)
  await runW(ctxW, ['xattr', '-w', 'user.t', 'hi', '/f'])
  t.is(ctxW.exitCode, 0)

  const runL = await loadBin('xattr')
  const ctxL = createCtx(store)
  await runL(ctxL, ['xattr', '-l', '/f'])
  t.is(ctxL.exitCode, 0)
  t.is(ctxL._logs.join('\n'), 'user.t: hi')

  const runD = await loadBin('xattr')
  const ctxD = createCtx(store)
  await runD(ctxD, ['xattr', '-d', 'user.t', '/f'])
  t.is(ctxD.exitCode, 0)

  const runNames = await loadBin('xattr')
  const ctxN = createCtx(store)
  await runNames(ctxN, ['xattr', '/f'])
  t.is(ctxN.exitCode, 0)
  t.is(ctxN._logs.length, 0)
})

test('getfacl and xattr on personal-drive-shaped metadata paths', async (t) => {
  const meta = '/.bare/os/registry.json'
  const store = {
    files: {
      [meta]: {
        stat: { mode: 0o600, type: 'file', mtimeMs: 1 },
        body: b4a.from('{}')
      },
      [`${meta}.bare_acl`]: {
        stat: { mode: 0o600, type: 'file', mtimeMs: 1 },
        body: b4a.from('user::rw-\nother::---\n')
      }
    }
  }
  const runG = await loadBin('getfacl')
  const ctxG = createCtx(store)
  await runG(ctxG, ['getfacl', '-c', meta])
  t.is(ctxG.exitCode, 0)
  t.ok(ctxG._logs.join('\n').includes('other::---'))

  const runX = await loadBin('xattr')
  const ctxX = createCtx(store)
  await runX(ctxX, ['xattr', '-w', 'user.meta', 'v1', meta])
  t.is(ctxX.exitCode, 0)
  t.ok(store.files[`${meta}.bare_xattr.json`])
})