130 lines
3.6 KiB
Plaintext
130 lines
3.6 KiB
Plaintext
/* BARE_OS_BIN_API 1.0.0 — bump when staged /bin script semantics change (see developer guide). */
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/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
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function bareStdin(ctx) {
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return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
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}
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/** @param {number} mode @param {'file' | 'directory' | 'symlink'} type */
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function bareFormatModeString(mode, type) {
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const typeChar = type === 'directory' ? 'd' : type === 'symlink' ? 'l' : '-'
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const perm = mode & 0o777
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const r = (bit) => (perm & bit ? 'r' : '-')
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const w = (bit) => (perm & bit ? 'w' : '-')
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const x = (bit) => (perm & bit ? 'x' : '-')
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return (
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typeChar +
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r(0o400) +
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w(0o200) +
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x(0o100) +
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r(0o040) +
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w(0o020) +
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x(0o010) +
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r(0o004) +
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w(0o002) +
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x(0o001)
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)
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}
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/** @param {number} mtimeMs @param {number} [nowMs] */
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function bareFormatLsMtime(mtimeMs, nowMs) {
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const now = nowMs != null ? nowMs : Date.now()
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const d = new Date(mtimeMs)
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const months = [
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'Jan',
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'Feb',
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'Mar',
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'Apr',
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'May',
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'Jun',
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'Jul',
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'Aug',
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'Sep',
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'Oct',
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'Nov',
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'Dec'
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]
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const mon = months[d.getMonth()]
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const day = String(d.getDate()).padStart(2, ' ')
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const sixMo = 180 * 24 * 3600 * 1000
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if (Math.abs(now - mtimeMs) > sixMo) {
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const yr = String(d.getFullYear()).padStart(4, ' ')
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return mon + ' ' + day + ' ' + yr
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}
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const hh = String(d.getHours()).padStart(2, '0')
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const mm = String(d.getMinutes()).padStart(2, '0')
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return mon + ' ' + day + ' ' + hh + ':' + mm
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}
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/** @param {number} size */
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function barePosixBlocks(size) {
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return Math.ceil(Number(size) / 512) || 0
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}
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/**
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* Raw stdout for NUL/binary when **`process.stdout.write`** is missing.
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* If **`ctx.bareOsBinWrite(Uint8Array|string)`** is set (tests / host), use it.
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* @param {Record<string, unknown>} ctx
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* @param {string | Uint8Array} chunk
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* @returns {boolean}
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*/
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function bareOsEmitRaw(ctx, chunk) {
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if (typeof ctx.bareOsBinWrite === 'function') {
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const b4 = ctx.b4a
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const u8 =
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typeof chunk === 'string'
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? b4 && typeof b4.from === 'function'
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? b4.from(chunk)
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: new TextEncoder().encode(chunk)
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: chunk
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ctx.bareOsBinWrite(u8 instanceof Uint8Array ? u8 : new Uint8Array(u8))
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return true
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}
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const w = globalThis.process?.stdout?.write
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if (typeof w === 'function') {
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w.call(globalThis.process.stdout, chunk)
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return true
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}
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return false
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}
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async function readUtf8(ctx, path) {
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const vfs = ctx.vfs
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if (!vfs || typeof vfs.readFile !== 'function') {
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throw new Error('kernel-boot-diff: vfs.readFile unavailable')
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}
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const buf = await vfs.readFile(path)
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return ctx.b4a ? ctx.b4a.toString(buf) : String(buf)
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}
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async function run(ctx, argv) {
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const a = argv[2]
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const b = argv[3]
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if (!a || !b) {
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ctx.console.error('Usage: kernel-boot-diff FILE1 FILE2')
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ctx.console.error('Compares NDJSON or line-oriented boot checkpoint dumps.')
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ctx.exitCode = 1
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return
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}
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let t1 = ''
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let t2 = ''
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try {
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;[t1, t2] = await Promise.all([readUtf8(ctx, a), readUtf8(ctx, b)])
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} catch (e) {
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ctx.console.error(
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'kernel-boot-diff: ' + ((e && e.message) || String(e))
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)
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ctx.exitCode = 1
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return
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}
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const lines1 = t1.split(/\r?\n/).filter((x) => x.trim())
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const lines2 = t2.split(/\r?\n/).filter((x) => x.trim())
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const s1 = new Set(lines1)
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const s2 = new Set(lines2)
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for (const x of lines2) {
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if (!s1.has(x)) ctx.console.log('+ ' + x.slice(0, 800))
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}
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for (const x of lines1) {
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if (!s2.has(x)) ctx.console.log('- ' + x.slice(0, 800))
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}
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}
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