@sanity/migrate
Version:
Tooling for running data migrations on Sanity.io projects
253 lines (252 loc) • 9.53 kB
JavaScript
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
try {
var info = gen[key](arg);
var value = info.value;
} catch (error) {
reject(error);
return;
}
if (info.done) {
resolve(value);
} else {
Promise.resolve(value).then(_next, _throw);
}
}
function _async_to_generator(fn) {
return function() {
var self = this, args = arguments;
return new Promise(function(resolve, reject) {
var gen = fn.apply(self, args);
function _next(value) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
}
function _throw(err) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
}
_next(undefined);
});
};
}
function _ts_generator(thisArg, body) {
var f, y, t, _ = {
label: 0,
sent: function() {
if (t[0] & 1) throw t[1];
return t[1];
},
trys: [],
ops: []
}, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype), d = Object.defineProperty;
return d(g, "next", {
value: verb(0)
}), d(g, "throw", {
value: verb(1)
}), d(g, "return", {
value: verb(2)
}), typeof Symbol === "function" && d(g, Symbol.iterator, {
value: function() {
return this;
}
}), g;
function verb(n) {
return function(v) {
return step([
n,
v
]);
};
}
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while(g && (g = 0, op[0] && (_ = 0)), _)try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [
op[0] & 2,
t.value
];
switch(op[0]){
case 0:
case 1:
t = op;
break;
case 4:
_.label++;
return {
value: op[1],
done: false
};
case 5:
_.label++;
y = op[1];
op = [
0
];
continue;
case 7:
op = _.ops.pop();
_.trys.pop();
continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {
_ = 0;
continue;
}
if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {
_.label = op[1];
break;
}
if (op[0] === 6 && _.label < t[1]) {
_.label = t[1];
t = op;
break;
}
if (t && _.label < t[2]) {
_.label = t[2];
_.ops.push(op);
break;
}
if (t[2]) _.ops.pop();
_.trys.pop();
continue;
}
op = body.call(thisArg, _);
} catch (e) {
op = [
6,
e
];
y = 0;
} finally{
f = t = 0;
}
if (op[0] & 5) throw op[1];
return {
value: op[0] ? op[1] : void 0,
done: true
};
}
}
import { ReadableStream } from 'node:stream/web';
import { BufferList } from './BufferList.js';
import * as headers from './headers.js';
// Inspired by
// - https://github.com/alanshaw/it-tar/blob/master/src/extract.ts
// - https://github.com/mafintosh/tar-stream/blob/master/extract.js
var emptyReadableStream = function() {
return new ReadableStream({
pull: function pull(controller) {
controller.close();
}
});
};
export function untar(stream) {
var options = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : {};
var buffer = new BufferList();
var reader = stream.getReader();
var readingChunk = false;
return new ReadableStream({
pull: function pull(controller) {
return _async_to_generator(function() {
var _options_filenameEncoding, _options_allowUnknownFormat, _ref, done, value, headerChunk, header;
return _ts_generator(this, function(_state) {
switch(_state.label){
case 0:
if (readingChunk) {
return [
2
];
}
return [
4,
reader.read()
];
case 1:
_ref = _state.sent(), done = _ref.done, value = _ref.value;
if (!done) {
buffer.push(value);
}
headerChunk = buffer.shift(512);
if (!headerChunk) {
throw new Error('Unexpected end of tar file. Expected 512 bytes of headers.');
}
header = headers.decode(headerChunk, (_options_filenameEncoding = options.filenameEncoding) !== null && _options_filenameEncoding !== void 0 ? _options_filenameEncoding : 'utf8', (_options_allowUnknownFormat = options.allowUnknownFormat) !== null && _options_allowUnknownFormat !== void 0 ? _options_allowUnknownFormat : false);
if (header) {
if (header.size === null || header.size === 0 || header.type === 'directory') {
controller.enqueue([
header,
emptyReadableStream()
]);
} else {
readingChunk = true;
controller.enqueue([
header,
entryStream(reader, header.size, buffer, function() {
readingChunk = false;
})
]);
}
} else if (done) {
// note - there might be more data in the buffer, after the input stream is done
// so only complete if we couldn't find a header
controller.close();
}
return [
2
];
}
});
})();
}
});
}
function entryStream(reader, expectedBytes, buffer, next) {
var totalBytesRead = 0;
// let pulling = false
return new ReadableStream({
pull: function pull(controller) {
return _async_to_generator(function() {
var _ref, done, value, remaining, chunk;
return _ts_generator(this, function(_state) {
switch(_state.label){
case 0:
return [
4,
reader.read()
];
case 1:
_ref = _state.sent(), done = _ref.done, value = _ref.value;
remaining = expectedBytes - totalBytesRead;
if (!done) {
buffer.push(value);
}
chunk = buffer.shiftFirst(remaining);
if (!chunk) {
throw new Error('Premature end of tar stream');
}
controller.enqueue(chunk);
totalBytesRead += chunk.byteLength;
if ((chunk === null || chunk === void 0 ? void 0 : chunk.byteLength) === remaining) {
// We've reached the end of the entry, discard any padding at the end (
discardPadding(buffer, expectedBytes);
controller.close();
next();
}
return [
2
];
}
});
})();
}
});
}
function getPadding(size) {
size &= 511;
return size === 0 ? 0 : 512 - size;
}
function discardPadding(bl, size) {
var overflow = getPadding(size);
if (overflow > 0) {
bl.shift(overflow);
}
}