@dev-build-deploy/diagnose-it
Version:
Expressive Diagnostics library
107 lines (106 loc) • 4.57 kB
JavaScript
;
/*
* SPDX-FileCopyrightText: 2023 Kevin de Jong <monkaii@hotmail.com>
* SPDX-License-Identifier: MIT
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.applyPatch = exports.createPatch = void 0;
const fs_1 = __importDefault(require("fs"));
const diff = __importStar(require("diff"));
/**
* Creates a patch based on an unified Diff.
*
* NOTE: This is not a full implementation of the unified Diff format,
* but only supports the bare minimum required to create a patch
* that applies Fix-It Hints, covering a single line in a single
* hunk.
* @returns Patch.
*/
function createPatch(message) {
var _a, _b, _c, _d;
if (message.context === undefined) {
throw new Error("Cannot apply FixIt hints without a context.");
}
// get modification date of file as Date object
const stats = fs_1.default.existsSync(message.file) ? fs_1.default.statSync(message.file) : undefined;
const mtime = stats ? new Date(stats.mtimeMs) : new Date();
const original = (_a = message.context) === null || _a === void 0 ? void 0 : _a.lines[((_b = message.message.linenumber) !== null && _b !== void 0 ? _b : 1) - message.context.linenumber];
// apply fixit hints to original string
let expected = original;
// each fixit hint modifies the string, so we need to keep track of the offset
let offset = 0;
// Use a copy of the array to prevent modifying the original
const fixitHints = [...message.getFixitHints()];
fixitHints.forEach(fixit => {
var _a, _b, _c, _d;
fixit.range.index += offset;
expected = fixit.apply(expected);
// update offset based on modification type
switch (fixit.modification) {
case "INSERT":
offset += (_b = (_a = fixit.text) === null || _a === void 0 ? void 0 : _a.length) !== null && _b !== void 0 ? _b : 0;
break;
case "REMOVE":
offset -= fixit.range.length;
break;
case "REPLACE":
offset += ((_d = (_c = fixit.text) === null || _c === void 0 ? void 0 : _c.length) !== null && _d !== void 0 ? _d : fixit.range.length) - fixit.range.length;
break;
}
});
const linenumber = message.context.linenumber;
const linecount = message.context.lines.length;
let result = `--- ${message.file} ${mtime.toLocaleString("en-GB")}
+++ ${message.file}.fix ${new Date().toLocaleString("en-GB")}
@@ -${linenumber},${linecount} +${linenumber},${linecount} @@`;
for (const line of (_d = (_c = message.context) === null || _c === void 0 ? void 0 : _c.lines) !== null && _d !== void 0 ? _d : []) {
const modification = line === original && original !== expected;
result += `\n${modification ? "-" : " "}${line}`;
if (modification) {
result += `\n+${expected}`;
}
}
return result;
}
exports.createPatch = createPatch;
/**
* Applies a patch (see createPatch) to a file using a Buffer.
* @param patch
* @internal
*/
function applyPatch(patch) {
const filename = patch.split(/\r?\n/)[0].split(" ")[1];
const source = fs_1.default.readFileSync(filename, "utf-8");
const res = diff.applyPatch(source, patch);
if (res === false) {
throw new Error("Failed to apply patch");
}
return res;
}
exports.applyPatch = applyPatch;