@pando/git-remote-pando
Version:
git-remote-helper for pando
262 lines • 12.4 kB
JavaScript
"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = 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 (_) 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 };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var debug_1 = __importDefault(require("debug"));
var fs_extra_1 = __importDefault(require("fs-extra"));
var shelljs_1 = __importDefault(require("shelljs"));
var promise_1 = __importDefault(require("simple-git/promise"));
var path_1 = __importDefault(require("path"));
var smart_buffer_1 = require("smart-buffer");
var zlib_1 = __importDefault(require("zlib"));
var git = promise_1.default();
var GitHelper = /** @class */ (function () {
// OK
function GitHelper(helper) {
this.helper = helper;
this._debug = debug_1.default('pando');
}
/***** core methods *****/
// OK
GitHelper.prototype.collect = function (oid, mapping) {
return __awaiter(this, void 0, void 0, function () {
var _a, _b, _c, cid, node, _mapping, _d, _e, _i, entry, _mapping;
return __generator(this, function (_f) {
switch (_f.label) {
case 0:
this._debug('collecting', oid);
cid = this.helper.ipld.shaToCid(oid);
if (mapping[cid])
return [2 /*return*/, mapping];
return [4 /*yield*/, this.load(oid)];
case 1:
node = _f.sent();
if (!(node.gitType === 'commit')) return [3 /*break*/, 3];
return [4 /*yield*/, this.collect(this.helper.ipld.cidToSha(node.tree['/']), mapping)];
case 2:
_mapping = _f.sent();
return [2 /*return*/, __assign({}, mapping, _mapping, (_a = {}, _a[cid] = node, _a))];
case 3:
if (!Buffer.isBuffer(node)) return [3 /*break*/, 4];
// node is a blob
return [2 /*return*/, __assign({}, mapping, (_b = {}, _b[cid] = node, _b))];
case 4:
_d = [];
for (_e in node)
_d.push(_e);
_i = 0;
_f.label = 5;
case 5:
if (!(_i < _d.length)) return [3 /*break*/, 8];
entry = _d[_i];
return [4 /*yield*/, this.collect(this.helper.ipld.cidToSha(node[entry].hash['/']), mapping)];
case 6:
_mapping = _f.sent();
mapping = __assign({}, mapping, _mapping);
_f.label = 7;
case 7:
_i++;
return [3 /*break*/, 5];
case 8: return [2 /*return*/, __assign({}, mapping, (_c = {}, _c[cid] = node, _c))];
}
});
});
};
// OK
GitHelper.prototype.download = function (oid) {
return __awaiter(this, void 0, void 0, function () {
var cid, node, _i, _a, parent_1, _b, _c, _d, entry, _e;
return __generator(this, function (_f) {
switch (_f.label) {
case 0:
this._debug('downloading', oid);
return [4 /*yield*/, this.exists(oid)];
case 1:
if (_f.sent())
return [2 /*return*/];
cid = this.helper.ipld.shaToCid(oid);
return [4 /*yield*/, this.helper.ipld.get(cid)];
case 2:
node = _f.sent();
if (!(node.gitType === 'commit')) return [3 /*break*/, 9];
// node is a commit
return [4 /*yield*/, this.download(this.helper.ipld.cidToSha(node.tree['/']))];
case 3:
// node is a commit
_f.sent();
_i = 0, _a = node.parents;
_f.label = 4;
case 4:
if (!(_i < _a.length)) return [3 /*break*/, 7];
parent_1 = _a[_i];
return [4 /*yield*/, this.download(this.helper.ipld.cidToSha(parent_1['/']))];
case 5:
_f.sent();
_f.label = 6;
case 6:
_i++;
return [3 /*break*/, 4];
case 7: return [4 /*yield*/, this.dump(oid, node)];
case 8:
_f.sent();
return [3 /*break*/, 18];
case 9:
if (!Buffer.isBuffer(node)) return [3 /*break*/, 11];
// node is a blob
return [4 /*yield*/, this.dump(oid, node)];
case 10:
// node is a blob
_f.sent();
return [3 /*break*/, 18];
case 11:
_b = [];
for (_c in node)
_b.push(_c);
_d = 0;
_f.label = 12;
case 12:
if (!(_d < _b.length)) return [3 /*break*/, 16];
entry = _b[_d];
_e = this.download;
return [4 /*yield*/, this.helper.ipld.cidToSha(node[entry].hash['/'])];
case 13: return [4 /*yield*/, _e.apply(this, [_f.sent()])];
case 14:
_f.sent();
_f.label = 15;
case 15:
_d++;
return [3 /*break*/, 12];
case 16: return [4 /*yield*/, this.dump(oid, node)];
case 17:
_f.sent();
_f.label = 18;
case 18: return [2 /*return*/];
}
});
});
};
/***** fs-related methods *****/
// OK
GitHelper.prototype.exists = function (oid) {
return __awaiter(this, void 0, void 0, function () {
var _a, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
_b = (_a = fs_extra_1.default).pathExists;
return [4 /*yield*/, this.path(oid)];
case 1:
// modify this function to rely on git cat-file -e $sha^{commit}
// see https://stackoverflow.com/questions/18515488/how-to-check-if-the-commit-exists-in-a-git-repository-by-its-sha-1
return [2 /*return*/, _b.apply(_a, [_c.sent()])];
}
});
});
};
// OK
GitHelper.prototype.load = function (oid) {
return __awaiter(this, void 0, void 0, function () {
var type, size, data, raw;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
type = shelljs_1.default.exec("git cat-file -t " + oid, { silent: true }).stdout.trim();
size = shelljs_1.default.exec("git cat-file -s " + oid, { silent: true }).stdout.trim();
return [4 /*yield*/, git.binaryCatFile([type, oid])];
case 1:
data = _a.sent();
raw = new smart_buffer_1.SmartBuffer();
raw.writeString(type + " ");
raw.writeString(size);
raw.writeUInt8(0);
raw.writeBuffer(data);
return [4 /*yield*/, this.helper.ipld.deserialize(raw.toBuffer())];
case 2: return [2 /*return*/, _a.sent()];
}
});
});
};
// OK
GitHelper.prototype.dump = function (oid, node) {
return __awaiter(this, void 0, void 0, function () {
var path, buffer;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.path(oid)];
case 1:
path = _a.sent();
return [4 /*yield*/, this.helper.ipld.serialize(node)];
case 2:
buffer = _a.sent();
return [4 /*yield*/, fs_extra_1.default.ensureFile(path)];
case 3:
_a.sent();
fs_extra_1.default.writeFileSync(path, zlib_1.default.deflateSync(buffer));
return [2 /*return*/];
}
});
});
};
/***** utility methods *****/
// OK
GitHelper.prototype.path = function (oid) {
return __awaiter(this, void 0, void 0, function () {
var subdirectory, filename;
return __generator(this, function (_a) {
subdirectory = oid.substring(0, 2);
filename = oid.substring(2);
return [2 /*return*/, path_1.default.join(this.helper.path, 'objects', subdirectory, filename)];
});
});
};
return GitHelper;
}());
exports.default = GitHelper;
//# sourceMappingURL=git-helper.js.map