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Frontend-Learner/node_modules/diff/libcjs/patch/create.js
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Frontend-Learner/node_modules/diff/libcjs/patch/create.js
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"use strict";
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var __assign = (this && this.__assign) || function () {
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__assign = Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};
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return __assign.apply(this, arguments);
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.structuredPatch = structuredPatch;
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exports.formatPatch = formatPatch;
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exports.createTwoFilesPatch = createTwoFilesPatch;
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exports.createPatch = createPatch;
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var line_js_1 = require("../diff/line.js");
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function structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {
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var optionsObj;
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if (!options) {
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optionsObj = {};
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}
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else if (typeof options === 'function') {
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optionsObj = { callback: options };
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}
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else {
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optionsObj = options;
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}
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if (typeof optionsObj.context === 'undefined') {
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optionsObj.context = 4;
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}
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// We copy this into its own variable to placate TypeScript, which thinks
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// optionsObj.context might be undefined in the callbacks below.
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var context = optionsObj.context;
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// @ts-expect-error (runtime check for something that is correctly a static type error)
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if (optionsObj.newlineIsToken) {
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throw new Error('newlineIsToken may not be used with patch-generation functions, only with diffing functions');
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}
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if (!optionsObj.callback) {
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return diffLinesResultToPatch((0, line_js_1.diffLines)(oldStr, newStr, optionsObj));
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}
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else {
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var callback_1 = optionsObj.callback;
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(0, line_js_1.diffLines)(oldStr, newStr, __assign(__assign({}, optionsObj), { callback: function (diff) {
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var patch = diffLinesResultToPatch(diff);
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// TypeScript is unhappy without the cast because it does not understand that `patch` may
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// be undefined here only if `callback` is StructuredPatchCallbackAbortable:
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callback_1(patch);
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} }));
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}
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function diffLinesResultToPatch(diff) {
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// STEP 1: Build up the patch with no "\ No newline at end of file" lines and with the arrays
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// of lines containing trailing newline characters. We'll tidy up later...
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if (!diff) {
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return;
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}
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diff.push({ value: '', lines: [] }); // Append an empty value to make cleanup easier
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function contextLines(lines) {
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return lines.map(function (entry) { return ' ' + entry; });
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}
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var hunks = [];
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var oldRangeStart = 0, newRangeStart = 0, curRange = [], oldLine = 1, newLine = 1;
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for (var i = 0; i < diff.length; i++) {
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var current = diff[i], lines = current.lines || splitLines(current.value);
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current.lines = lines;
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if (current.added || current.removed) {
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// If we have previous context, start with that
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if (!oldRangeStart) {
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var prev = diff[i - 1];
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oldRangeStart = oldLine;
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newRangeStart = newLine;
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if (prev) {
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curRange = context > 0 ? contextLines(prev.lines.slice(-context)) : [];
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oldRangeStart -= curRange.length;
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newRangeStart -= curRange.length;
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}
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}
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// Output our changes
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for (var _i = 0, lines_1 = lines; _i < lines_1.length; _i++) {
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var line = lines_1[_i];
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curRange.push((current.added ? '+' : '-') + line);
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}
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// Track the updated file position
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if (current.added) {
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newLine += lines.length;
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}
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else {
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oldLine += lines.length;
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}
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}
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else {
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// Identical context lines. Track line changes
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if (oldRangeStart) {
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// Close out any changes that have been output (or join overlapping)
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if (lines.length <= context * 2 && i < diff.length - 2) {
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// Overlapping
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for (var _a = 0, _b = contextLines(lines); _a < _b.length; _a++) {
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var line = _b[_a];
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curRange.push(line);
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}
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}
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else {
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// end the range and output
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var contextSize = Math.min(lines.length, context);
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for (var _c = 0, _d = contextLines(lines.slice(0, contextSize)); _c < _d.length; _c++) {
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var line = _d[_c];
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curRange.push(line);
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}
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var hunk = {
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oldStart: oldRangeStart,
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oldLines: (oldLine - oldRangeStart + contextSize),
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newStart: newRangeStart,
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newLines: (newLine - newRangeStart + contextSize),
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lines: curRange
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};
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hunks.push(hunk);
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oldRangeStart = 0;
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newRangeStart = 0;
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curRange = [];
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}
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}
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oldLine += lines.length;
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newLine += lines.length;
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}
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}
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// Step 2: eliminate the trailing `\n` from each line of each hunk, and, where needed, add
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// "\ No newline at end of file".
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for (var _e = 0, hunks_1 = hunks; _e < hunks_1.length; _e++) {
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var hunk = hunks_1[_e];
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for (var i = 0; i < hunk.lines.length; i++) {
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if (hunk.lines[i].endsWith('\n')) {
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hunk.lines[i] = hunk.lines[i].slice(0, -1);
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}
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else {
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hunk.lines.splice(i + 1, 0, '\\ No newline at end of file');
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i++; // Skip the line we just added, then continue iterating
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}
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}
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}
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return {
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oldFileName: oldFileName, newFileName: newFileName,
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oldHeader: oldHeader, newHeader: newHeader,
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hunks: hunks
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};
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}
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}
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/**
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* creates a unified diff patch.
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* @param patch either a single structured patch object (as returned by `structuredPatch`) or an array of them (as returned by `parsePatch`)
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*/
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function formatPatch(patch) {
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if (Array.isArray(patch)) {
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return patch.map(formatPatch).join('\n');
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}
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var ret = [];
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if (patch.oldFileName == patch.newFileName) {
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ret.push('Index: ' + patch.oldFileName);
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}
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ret.push('===================================================================');
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ret.push('--- ' + patch.oldFileName + (typeof patch.oldHeader === 'undefined' ? '' : '\t' + patch.oldHeader));
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ret.push('+++ ' + patch.newFileName + (typeof patch.newHeader === 'undefined' ? '' : '\t' + patch.newHeader));
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for (var i = 0; i < patch.hunks.length; i++) {
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var hunk = patch.hunks[i];
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// Unified Diff Format quirk: If the chunk size is 0,
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// the first number is one lower than one would expect.
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// https://www.artima.com/weblogs/viewpost.jsp?thread=164293
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if (hunk.oldLines === 0) {
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hunk.oldStart -= 1;
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}
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if (hunk.newLines === 0) {
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hunk.newStart -= 1;
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}
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ret.push('@@ -' + hunk.oldStart + ',' + hunk.oldLines
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+ ' +' + hunk.newStart + ',' + hunk.newLines
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+ ' @@');
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for (var _i = 0, _a = hunk.lines; _i < _a.length; _i++) {
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var line = _a[_i];
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ret.push(line);
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}
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}
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return ret.join('\n') + '\n';
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}
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function createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {
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if (typeof options === 'function') {
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options = { callback: options };
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}
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if (!(options === null || options === void 0 ? void 0 : options.callback)) {
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var patchObj = structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options);
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if (!patchObj) {
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return;
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}
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return formatPatch(patchObj);
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}
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else {
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var callback_2 = options.callback;
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structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, __assign(__assign({}, options), { callback: function (patchObj) {
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if (!patchObj) {
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callback_2(undefined);
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}
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else {
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callback_2(formatPatch(patchObj));
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}
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} }));
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}
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}
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function createPatch(fileName, oldStr, newStr, oldHeader, newHeader, options) {
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return createTwoFilesPatch(fileName, fileName, oldStr, newStr, oldHeader, newHeader, options);
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}
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/**
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* Split `text` into an array of lines, including the trailing newline character (where present)
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*/
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function splitLines(text) {
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var hasTrailingNl = text.endsWith('\n');
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var result = text.split('\n').map(function (line) { return line + '\n'; });
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if (hasTrailingNl) {
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result.pop();
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}
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else {
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result.push(result.pop().slice(0, -1));
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}
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return result;
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}
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