264 lines
7.8 KiB
JavaScript
264 lines
7.8 KiB
JavaScript
/*
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*
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* Diff Parser (diff-parser.js)
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* Author: rtfpessoa
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*
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*/
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(function() {
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var utils = require('./utils.js').Utils;
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var LINE_TYPE = {
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INSERTS: 'd2h-ins',
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DELETES: 'd2h-del',
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INSERT_CHANGES: 'd2h-ins d2h-change',
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DELETE_CHANGES: 'd2h-del d2h-change',
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CONTEXT: 'd2h-cntx',
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INFO: 'd2h-info'
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};
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function DiffParser() {
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}
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DiffParser.prototype.LINE_TYPE = LINE_TYPE;
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DiffParser.prototype.generateDiffJson = function(diffInput, config) {
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var files = [];
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var currentFile = null;
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var currentBlock = null;
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var oldLine = null;
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var newLine = null;
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var saveBlock = function() {
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/* Add previous block(if exists) before start a new file */
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if (currentBlock) {
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currentFile.blocks.push(currentBlock);
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currentBlock = null;
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}
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};
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var saveFile = function() {
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/*
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* Add previous file(if exists) before start a new one
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* if it has name (to avoid binary files errors)
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*/
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if (currentFile && currentFile.newName) {
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files.push(currentFile);
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currentFile = null;
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}
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};
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var startFile = function() {
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saveBlock();
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saveFile();
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/* Create file structure */
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currentFile = {};
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currentFile.blocks = [];
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currentFile.deletedLines = 0;
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currentFile.addedLines = 0;
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};
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var startBlock = function(line) {
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saveBlock();
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var values;
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if (values = /^@@ -(\d+),\d+ \+(\d+),\d+ @@.*/.exec(line)) {
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currentFile.isCombined = false;
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} else if (values = /^@@@ -(\d+),\d+ -\d+,\d+ \+(\d+),\d+ @@@.*/.exec(line)) {
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currentFile.isCombined = true;
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} else {
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values = [0, 0];
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currentFile.isCombined = false;
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}
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oldLine = values[1];
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newLine = values[2];
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/* Create block metadata */
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currentBlock = {};
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currentBlock.lines = [];
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currentBlock.oldStartLine = oldLine;
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currentBlock.newStartLine = newLine;
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currentBlock.header = line;
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};
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var createLine = function(line) {
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var currentLine = {};
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currentLine.content = line;
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var newLinePrefixes = !currentFile.isCombined ? ['+'] : ['+', ' +'];
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var delLinePrefixes = !currentFile.isCombined ? ['-'] : ['-', ' -'];
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/* Fill the line data */
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if (utils.startsWith(line, newLinePrefixes)) {
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currentFile.addedLines++;
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currentLine.type = LINE_TYPE.INSERTS;
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currentLine.oldNumber = null;
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currentLine.newNumber = newLine++;
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currentBlock.lines.push(currentLine);
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} else if (utils.startsWith(line, delLinePrefixes)) {
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currentFile.deletedLines++;
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currentLine.type = LINE_TYPE.DELETES;
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currentLine.oldNumber = oldLine++;
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currentLine.newNumber = null;
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currentBlock.lines.push(currentLine);
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} else {
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currentLine.type = LINE_TYPE.CONTEXT;
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currentLine.oldNumber = oldLine++;
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currentLine.newNumber = newLine++;
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currentBlock.lines.push(currentLine);
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}
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};
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var diffLines =
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diffInput.replace(/\\ No newline at end of file/g, '')
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.replace(/\r\n?/g, '\n')
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.split('\n');
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/* Diff */
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var oldMode = /^old mode (\d{6})/;
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var newMode = /^new mode (\d{6})/;
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var deletedFileMode = /^deleted file mode (\d{6})/;
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var newFileMode = /^new file mode (\d{6})/;
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var copyFrom = /^copy from "?(.+?)"?/;
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var copyTo = /^copy to "?(.+?)"?/;
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var renameFrom = /^rename from "?(.+?)"?/;
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var renameTo = /^rename to "?(.+?)"?/;
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var similarityIndex = /^similarity index (\d+)%/;
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var dissimilarityIndex = /^dissimilarity index (\d+)%/;
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var index = /^index ([0-9a-z]+)..([0-9a-z]+) (\d{6})?/;
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/* Combined Diff */
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var combinedIndex = /^index ([0-9a-z]+),([0-9a-z]+)..([0-9a-z]+)/;
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var combinedMode = /^mode (\d{6}),(\d{6})..(\d{6})/;
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var combinedNewFile = /^new file mode (\d{6})/;
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var combinedDeletedFile = /^deleted file mode (\d{6}),(\d{6})/;
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diffLines.forEach(function(line) {
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// Unmerged paths, and possibly other non-diffable files
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// https://github.com/scottgonzalez/pretty-diff/issues/11
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// Also, remove some useless lines
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if (!line || utils.startsWith(line, '*')) {
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return;
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}
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var values = [];
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if (utils.startsWith(line, 'diff')) {
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startFile();
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} else if (currentFile && !currentFile.oldName && (values = getSrcFilename(line, config))) {
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currentFile.oldName = values;
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currentFile.language = getExtension(currentFile.oldName, currentFile.language);
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} else if (currentFile && !currentFile.newName && (values = getDstFilename(line, config))) {
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currentFile.newName = values;
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currentFile.language = getExtension(currentFile.newName, currentFile.language);
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} else if (currentFile && utils.startsWith(line, '@@')) {
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startBlock(line);
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} else if ((values = oldMode.exec(line))) {
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currentFile.oldMode = values[1];
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} else if ((values = newMode.exec(line))) {
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currentFile.newMode = values[1];
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} else if ((values = deletedFileMode.exec(line))) {
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currentFile.deletedFileMode = values[1];
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} else if ((values = newFileMode.exec(line))) {
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currentFile.newFileMode = values[1];
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} else if ((values = copyFrom.exec(line))) {
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currentFile.oldName = values[1];
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currentFile.isCopy = true;
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} else if ((values = copyTo.exec(line))) {
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currentFile.newName = values[1];
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currentFile.isCopy = true;
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} else if ((values = renameFrom.exec(line))) {
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currentFile.oldName = values[1];
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currentFile.isRename = true;
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} else if ((values = renameTo.exec(line))) {
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currentFile.newName = values[1];
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currentFile.isRename = true;
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} else if ((values = similarityIndex.exec(line))) {
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currentFile.unchangedPercentage = values[1];
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} else if ((values = dissimilarityIndex.exec(line))) {
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currentFile.changedPercentage = values[1];
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} else if ((values = index.exec(line))) {
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currentFile.checksumBefore = values[1];
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currentFile.checksumAfter = values[2];
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values[2] && (currentFile.mode = values[3]);
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} else if ((values = combinedIndex.exec(line))) {
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currentFile.checksumBefore = [values[2], values[3]];
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currentFile.checksumAfter = values[1];
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} else if ((values = combinedMode.exec(line))) {
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currentFile.oldMode = [values[2], values[3]];
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currentFile.newMode = values[1];
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} else if ((values = combinedNewFile.exec(line))) {
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currentFile.newFileMode = values[1];
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} else if ((values = combinedDeletedFile.exec(line))) {
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currentFile.deletedFileMode = values[1];
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} else if (currentBlock) {
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createLine(line);
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}
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});
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saveBlock();
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saveFile();
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return files;
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};
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function getExtension(filename, language) {
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var nameSplit = filename.split('.');
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if (nameSplit.length > 1) {
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return nameSplit[nameSplit.length - 1];
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}
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return language;
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}
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function getSrcFilename(line, cfg) {
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var prefixes = ["a/", "i/", "w/", "c/", "o/"];
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if (cfg.srcPrefix) prefixes.push(cfg.srcPrefix);
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return _getFilename('---', line, prefixes);
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}
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function getDstFilename(line, cfg) {
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var prefixes = ["b/", "i/", "w/", "c/", "o/"];
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if (cfg.dstPrefix) prefixes.push(cfg.dstPrefix);
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return _getFilename('\\+\\+\\+', line, prefixes);
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}
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function _getFilename(linePrefix, line, prefixes) {
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var FilenameRegExp = new RegExp('^' + linePrefix + ' "?(.+?)"?$');
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var filename;
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var values = FilenameRegExp.exec(line);
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if (values && values[1]) {
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filename = values[1];
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var prefix = prefixes.find(function(prefix) {
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return filename.startsWith(prefix);
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});
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if (prefix) filename = filename.slice(prefix.length); // remove prefix if exists
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}
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return filename;
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}
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module.exports.DiffParser = new DiffParser();
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})();
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