134 lines
12 KiB
JavaScript
134 lines
12 KiB
JavaScript
/*istanbul ignore start*/'use strict';
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exports.__esModule = true;
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exports. /*istanbul ignore end*/parsePatch = parsePatch;
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function parsePatch(uniDiff) {
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/*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
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var diffstr = uniDiff.split('\n'),
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list = [],
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i = 0;
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function parseIndex() {
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var index = {};
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list.push(index);
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// Parse diff metadata
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while (i < diffstr.length) {
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var line = diffstr[i];
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// File header found, end parsing diff metadata
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if (/^(\-\-\-|\+\+\+|@@)\s/.test(line)) {
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break;
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}
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// Diff index
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var header = /^(?:Index:|diff(?: -r \w+)+)\s+(.+?)\s*$/.exec(line);
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if (header) {
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index.index = header[1];
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}
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i++;
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}
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// Parse file headers if they are defined. Unified diff requires them, but
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// there's no technical issues to have an isolated hunk without file header
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parseFileHeader(index);
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parseFileHeader(index);
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// Parse hunks
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index.hunks = [];
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while (i < diffstr.length) {
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var _line = diffstr[i];
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if (/^(Index:|diff|\-\-\-|\+\+\+)\s/.test(_line)) {
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break;
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} else if (/^@@/.test(_line)) {
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index.hunks.push(parseHunk());
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} else if (_line && options.strict) {
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// Ignore unexpected content unless in strict mode
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throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(_line));
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} else {
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i++;
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}
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}
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}
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// Parses the --- and +++ headers, if none are found, no lines
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// are consumed.
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function parseFileHeader(index) {
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var fileHeader = /^(\-\-\-|\+\+\+)\s+(\S*)\s?(.*?)\s*$/.exec(diffstr[i]);
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if (fileHeader) {
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var keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';
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index[keyPrefix + 'FileName'] = fileHeader[2];
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index[keyPrefix + 'Header'] = fileHeader[3];
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i++;
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}
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}
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// Parses a hunk
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// This assumes that we are at the start of a hunk.
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function parseHunk() {
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var chunkHeaderIndex = i,
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chunkHeaderLine = diffstr[i++],
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chunkHeader = chunkHeaderLine.split(/@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/);
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var hunk = {
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oldStart: +chunkHeader[1],
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oldLines: +chunkHeader[2] || 1,
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newStart: +chunkHeader[3],
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newLines: +chunkHeader[4] || 1,
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lines: []
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};
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var addCount = 0,
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removeCount = 0;
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for (; i < diffstr.length; i++) {
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var operation = diffstr[i][0];
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if (operation === '+' || operation === '-' || operation === ' ' || operation === '\\') {
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hunk.lines.push(diffstr[i]);
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if (operation === '+') {
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addCount++;
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} else if (operation === '-') {
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removeCount++;
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} else if (operation === ' ') {
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addCount++;
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removeCount++;
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}
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} else {
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break;
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}
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}
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// Handle the empty block count case
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if (!addCount && hunk.newLines === 1) {
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hunk.newLines = 0;
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}
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if (!removeCount && hunk.oldLines === 1) {
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hunk.oldLines = 0;
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}
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// Perform optional sanity checking
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if (options.strict) {
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if (addCount !== hunk.newLines) {
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throw new Error('Added line count did not match for hunk at line ' + (chunkHeaderIndex + 1));
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}
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if (removeCount !== hunk.oldLines) {
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throw new Error('Removed line count did not match for hunk at line ' + (chunkHeaderIndex + 1));
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}
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}
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return hunk;
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}
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while (i < diffstr.length) {
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parseIndex();
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}
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return list;
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}
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Unified diff requires them, but\n    // there's no technical issues to have an isolated hunk without file header\n    parseFileHeader(index);\n    parseFileHeader(index);\n\n    // Parse hunks\n    index.hunks = [];\n\n    while (i < diffstr.length) {\n      let line = diffstr[i];\n\n      if (/^(Index:|diff|\\-\\-\\-|\\+\\+\\+)\\s/.test(line)) {\n        break;\n      } else if (/^@@/.test(line)) {\n        index.hunks.push(parseHunk());\n      } else if (line && options.strict) {\n        // Ignore unexpected content unless in strict mode\n        throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(line));\n      } else {\n        i++;\n      }\n    }\n  }\n\n  // Parses the --- and +++ headers, if none are found, no lines\n  // are consumed.\n  function parseFileHeader(index) {\n    let fileHeader = (/^(\\-\\-\\-|\\+\\+\\+)\\s+(\\S*)\\s?(.*?)\\s*$/).exec(diffstr[i]);\n    if (fileHeader) {\n      let keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';\n      index[keyPrefix + 'FileName'] = fileHeader[2];\n      index[keyPrefix + 'Header'] = fileHeader[3];\n\n      i++;\n    }\n  }\n\n  // Parses a hunk\n  // This assumes that we are at the start of a hunk.\n  function parseHunk() {\n    let chunkHeaderIndex = i,\n        chunkHeaderLine = diffstr[i++],\n        chunkHeader = chunkHeaderLine.split(/@@ -(\\d+)(?:,(\\d+))? \\+(\\d+)(?:,(\\d+))? @@/);\n\n    let hunk = {\n      oldStart: +chunkHeader[1],\n      oldLines: +chunkHeader[2] || 1,\n      newStart: +chunkHeader[3],\n      newLines: +chunkHeader[4] || 1,\n      lines: []\n    };\n\n    let addCount = 0,\n        removeCount = 0;\n    for (; i < diffstr.length; i++) {\n      let operation = diffstr[i][0];\n\n      if (operation === '+' || operation === '-' || operation === ' ' || operation === '\\\\') {\n        hunk.lines.push(diffstr[i]);\n\n        if (operation === '+') {\n          addCount++;\n        } else if (operation === '-') {\n          removeCount++;\n        } else if (operation === ' ') {\n          addCount++;\n          removeCount++;\n        }\n      } else {\n        break;\n      }\n    }\n\n    // Handle the empty block count case\n    if (!addCount && hunk.newLines === 1) {\n      hunk.newLines = 0;\n    }\n    if (!removeCount && hunk.oldLines === 1) {\n      hunk.oldLines = 0;\n    }\n\n    // Perform optional sanity checking\n    if (options.strict) {\n      if (addCount !== hunk.newLines) {\n        throw new Error('Added line count did not match for hunk at line ' + (chunkHeaderIndex + 1));\n      }\n      if (removeCount !== hunk.oldLines) {\n        throw new Error('Removed line count did not match for hunk at line ' + (chunkHeaderIndex + 1));\n      }\n    }\n\n    return hunk;\n  }\n\n  while (i < diffstr.length) {\n    parseIndex();\n  }\n\n  return list;\n}\n"]}
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