Innovenergy_trunk/frontend/node_modules/diff/lib/patch/parse.js

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/*istanbul ignore start*/
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.parsePatch = parsePatch;
/*istanbul ignore end*/
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*$/.exec(line);
if (header) {
index.index = header[1];
}
i++;
} // Parse file headers if they are defined. Unified diff requires them, but
// there's no technical issues to have an isolated hunk without file header
parseFileHeader(index);
parseFileHeader(index); // Parse hunks
index.hunks = [];
while (i < diffstr.length) {
var _line = diffstr[i];
if (/^(Index:|diff|\-\-\-|\+\+\+)\s/.test(_line)) {
break;
} else if (/^@@/.test(_line)) {
index.hunks.push(parseHunk());
} else if (_line && options.strict) {
// Ignore unexpected content unless in strict mode
throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(_line));
} else {
i++;
}
}
} // Parses the --- and +++ headers, if none are found, no lines
// are consumed.
function parseFileHeader(index) {
var fileHeader = /^(---|\+\+\+)\s+(.*)$/.exec(diffstr[i]);
if (fileHeader) {
var keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';
var data = fileHeader[2].split('\t', 2);
var fileName = data[0].replace(/\\\\/g, '\\');
if (/^".*"$/.test(fileName)) {
fileName = fileName.substr(1, fileName.length - 2);
}
index[keyPrefix + 'FileName'] = fileName;
index[keyPrefix + 'Header'] = (data[1] || '').trim();
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].length == 0 && i != diffstr.length - 1 ? ' ' : 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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