222 lines
7 KiB
JavaScript
222 lines
7 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 (global, undefined) {
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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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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) {
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var files = [],
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currentFile = null,
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currentBlock = null,
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oldLine = null,
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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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/* fill the line data */
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if (utils.startsWith(line, "+") || utils.startsWith(line, " +")) {
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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, "-") || utils.startsWith(line, " -")) {
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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 = diffInput.split("\n");
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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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//|| utils.startsWith(line, "new") || utils.startsWith(line, "index")
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return;
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}
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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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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 = /^--- a\/(\S+).*$/.exec(line))) {
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currentFile.oldName = values[1];
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currentFile.language = getExtension(currentFile.oldName, currentFile.language);
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} else if (currentFile && !currentFile.newName && (values = /^\+\+\+ [b]?\/(\S+).*$/.exec(line))) {
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currentFile.newName = values[1];
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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) return nameSplit[nameSplit.length - 1];
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else return language;
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}
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if (typeof module !== 'undefined' && module.exports) {
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module.exports.DiffParser = new DiffParser();
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} else if (typeof global.DiffParser === 'undefined') {
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global.DiffParser = new DiffParser();
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}
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})(this);
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