GT2/GT2-iOS/node_modules/diff/lib/patch/parse.js

148 lines
15 KiB
JavaScript

/*istanbul ignore start*/'use strict';
exports.__esModule = true;
exports. /*istanbul ignore end*/parsePatch = parsePatch;
function parsePatch(uniDiff) {
/*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
var diffstr = uniDiff.split(/\r\n|[\n\v\f\r\x85]/),
delimiters = uniDiff.match(/\r\n|[\n\v\f\r\x85]/g) || [],
list = [],
i = 0;
function parseIndex() {
var index = {};
list.push(index);
// Parse diff metadata
while (i < diffstr.length) {
var line = diffstr[i];
// File header found, end parsing diff metadata
if (/^(\-\-\-|\+\+\+|@@)\s/.test(line)) {
break;
}
// Diff index
var header = /^(?:Index:|diff(?: -r \w+)+)\s+(.+?)\s*$/.exec(line);
if (header) {
index.index = header[1];
}
i++;
}
// Parse file headers if they are defined. Unified diff requires them, but
// there's no technical issues to have an isolated hunk without file header
parseFileHeader(index);
parseFileHeader(index);
// Parse hunks
index.hunks = [];
while (i < diffstr.length) {
var _line = diffstr[i];
if (/^(Index:|diff|\-\-\-|\+\+\+)\s/.test(_line)) {
break;
} else if (/^@@/.test(_line)) {
index.hunks.push(parseHunk());
} else if (_line && options.strict) {
// Ignore unexpected content unless in strict mode
throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(_line));
} else {
i++;
}
}
}
// Parses the --- and +++ headers, if none are found, no lines
// are consumed.
function parseFileHeader(index) {
var headerPattern = /^(---|\+\+\+)\s+([\S ]*)(?:\t(.*?)\s*)?$/;
var fileHeader = headerPattern.exec(diffstr[i]);
if (fileHeader) {
var keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';
var fileName = fileHeader[2].replace(/\\\\/g, '\\');
if (/^".*"$/.test(fileName)) {
fileName = fileName.substr(1, fileName.length - 2);
}
index[keyPrefix + 'FileName'] = fileName;
index[keyPrefix + 'Header'] = fileHeader[3];
i++;
}
}
// Parses a hunk
// This assumes that we are at the start of a hunk.
function parseHunk() {
var chunkHeaderIndex = i,
chunkHeaderLine = diffstr[i++],
chunkHeader = chunkHeaderLine.split(/@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/);
var hunk = {
oldStart: +chunkHeader[1],
oldLines: +chunkHeader[2] || 1,
newStart: +chunkHeader[3],
newLines: +chunkHeader[4] || 1,
lines: [],
linedelimiters: []
};
var addCount = 0,
removeCount = 0;
for (; i < diffstr.length; i++) {
// Lines starting with '---' could be mistaken for the "remove line" operation
// But they could be the header for the next file. Therefore prune such cases out.
if (diffstr[i].indexOf('--- ') === 0 && i + 2 < diffstr.length && diffstr[i + 1].indexOf('+++ ') === 0 && diffstr[i + 2].indexOf('@@') === 0) {
break;
}
var operation = diffstr[i][0];
if (operation === '+' || operation === '-' || operation === ' ' || operation === '\\') {
hunk.lines.push(diffstr[i]);
hunk.linedelimiters.push(delimiters[i] || '\n');
if (operation === '+') {
addCount++;
} else if (operation === '-') {
removeCount++;
} else if (operation === ' ') {
addCount++;
removeCount++;
}
} else {
break;
}
}
// Handle the empty block count case
if (!addCount && hunk.newLines === 1) {
hunk.newLines = 0;
}
if (!removeCount && hunk.oldLines === 1) {
hunk.oldLines = 0;
}
// Perform optional sanity checking
if (options.strict) {
if (addCount !== hunk.newLines) {
throw new Error('Added line count did not match for hunk at line ' + (chunkHeaderIndex + 1));
}
if (removeCount !== hunk.oldLines) {
throw new Error('Removed line count did not match for hunk at line ' + (chunkHeaderIndex + 1));
}
}
return hunk;
}
while (i < diffstr.length) {
parseIndex();
}
return list;
}
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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    const headerPattern = /^(---|\\+\\+\\+)\\s+([\\S ]*)(?:\\t(.*?)\\s*)?$/;\n    const fileHeader = headerPattern.exec(diffstr[i]);\n    if (fileHeader) {\n      let keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';\n      let fileName = fileHeader[2].replace(/\\\\\\\\/g, '\\\\');\n      if (/^\".*\"$/.test(fileName)) {\n        fileName = fileName.substr(1, fileName.length - 2);\n      }\n      index[keyPrefix + 'FileName'] = fileName;\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      linedelimiters: []\n    };\n\n    let addCount = 0,\n        removeCount = 0;\n    for (; i < diffstr.length; i++) {\n      // Lines starting with '---' could be mistaken for the \"remove line\" operation\n      // But they could be the header for the next file. Therefore prune such cases out.\n      if (diffstr[i].indexOf('--- ') === 0\n            && (i + 2 < diffstr.length)\n            && diffstr[i + 1].indexOf('+++ ') === 0\n            && diffstr[i + 2].indexOf('@@') === 0) {\n          break;\n      }\n      let operation = diffstr[i][0];\n\n      if (operation === '+' || operation === '-' || operation === ' ' || operation === '\\\\') {\n        hunk.lines.push(diffstr[i]);\n        hunk.linedelimiters.push(delimiters[i] || '\\n');\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"]}