142 lines
7.4 KiB
JavaScript
142 lines
7.4 KiB
JavaScript
const entryBuilder = require('./entry/entryBuilder');
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const entryEquality = require('./entry/entryEquality');
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const stats = require('./statistics/statisticsUpdate');
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const pathUtils = require('path');
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const fsPromise = require('./fs/fsPromise');
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const loopDetector = require('./symlink/loopDetector');
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const entryComparator = require('./entry/entryComparator');
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const entryType = require('./entry/entryType');
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const { getPrmissionDenieStateWhenLeftMissing, getPrmissionDenieStateWhenRightMissing, getPermissionDeniedState } = require('./permissions/permissionDeniedState');
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/**
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* Returns the sorted list of entries in a directory.
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*/
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function getEntries(rootEntry, relativePath, loopDetected, options) {
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if (!rootEntry || loopDetected) {
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return Promise.resolve([]);
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}
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if (rootEntry.isDirectory) {
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if (rootEntry.isPermissionDenied) {
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return [];
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}
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return fsPromise.readdir(rootEntry.absolutePath)
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.then(entries => entryBuilder.buildDirEntries(rootEntry, entries, relativePath, options));
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}
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return Promise.resolve([rootEntry]);
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}
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/**
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* Compares two directories asynchronously.
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*/
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function compare(rootEntry1, rootEntry2, level, relativePath, options, statistics, diffSet, symlinkCache) {
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const loopDetected1 = loopDetector.detectLoop(rootEntry1, symlinkCache.dir1);
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const loopDetected2 = loopDetector.detectLoop(rootEntry2, symlinkCache.dir2);
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loopDetector.updateSymlinkCache(symlinkCache, rootEntry1, rootEntry2, loopDetected1, loopDetected2);
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return Promise.all([getEntries(rootEntry1, relativePath, loopDetected1, options), getEntries(rootEntry2, relativePath, loopDetected2, options)])
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.then(entriesResult => {
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const entries1 = entriesResult[0];
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const entries2 = entriesResult[1];
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let i1 = 0, i2 = 0;
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const comparePromises = [];
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const compareFilePromises = [];
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let subDiffSet;
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while (i1 < entries1.length || i2 < entries2.length) {
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const entry1 = entries1[i1];
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const entry2 = entries2[i2];
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let type1, type2;
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// compare entry name (-1, 0, 1)
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let cmp;
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if (i1 < entries1.length && i2 < entries2.length) {
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cmp = entryComparator.compareEntry(entry1, entry2, options);
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type1 = entryType.getType(entry1);
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type2 = entryType.getType(entry2);
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}
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else if (i1 < entries1.length) {
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type1 = entryType.getType(entry1);
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type2 = entryType.getType(undefined);
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cmp = -1;
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}
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else {
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type1 = entryType.getType(undefined);
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type2 = entryType.getType(entry2);
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cmp = 1;
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}
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// process entry
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if (cmp === 0) {
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// Both left/right exist and have the same name and type
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const permissionDeniedState = getPermissionDeniedState(entry1, entry2);
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if (permissionDeniedState === "access-ok") {
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const compareEntryRes = entryEquality.isEntryEqualAsync(entry1, entry2, type1, diffSet, options);
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const samePromise = compareEntryRes.samePromise;
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const same = compareEntryRes.same;
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if (same !== undefined) {
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options.resultBuilder(entry1, entry2, same ? 'equal' : 'distinct', level, relativePath, options, statistics, diffSet, compareEntryRes.reason, permissionDeniedState);
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stats.updateStatisticsBoth(entry1, entry2, compareEntryRes.same, compareEntryRes.reason, type1, permissionDeniedState, statistics, options);
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}
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else {
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compareFilePromises.push(samePromise);
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}
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}
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else {
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const state = 'distinct';
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const reason = "permission-denied";
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const same = false;
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options.resultBuilder(entry1, entry2, state, level, relativePath, options, statistics, diffSet, reason, permissionDeniedState);
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stats.updateStatisticsBoth(entry1, entry2, same, reason, type1, permissionDeniedState, statistics, options);
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}
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i1++;
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i2++;
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if (!options.skipSubdirs && type1 === 'directory') {
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if (!options.noDiffSet) {
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subDiffSet = [];
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diffSet.push(subDiffSet);
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}
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comparePromises.push(compare(entry1, entry2, level + 1, pathUtils.join(relativePath, entry1.name), options, statistics, subDiffSet, loopDetector.cloneSymlinkCache(symlinkCache)));
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}
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}
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else if (cmp < 0) {
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// Right missing
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const permissionDeniedState = getPrmissionDenieStateWhenRightMissing(entry1);
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options.resultBuilder(entry1, undefined, 'left', level, relativePath, options, statistics, diffSet, undefined, permissionDeniedState);
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stats.updateStatisticsLeft(entry1, type1, permissionDeniedState, statistics, options);
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i1++;
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if (type1 === 'directory' && !options.skipSubdirs) {
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if (!options.noDiffSet) {
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subDiffSet = [];
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diffSet.push(subDiffSet);
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}
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comparePromises.push(compare(entry1, undefined, level + 1, pathUtils.join(relativePath, entry1.name), options, statistics, subDiffSet, loopDetector.cloneSymlinkCache(symlinkCache)));
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}
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}
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else {
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// Left missing
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let permissionDeniedState = getPrmissionDenieStateWhenLeftMissing(entry2);
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options.resultBuilder(undefined, entry2, 'right', level, relativePath, options, statistics, diffSet, undefined, permissionDeniedState);
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stats.updateStatisticsRight(entry2, type2, permissionDeniedState, statistics, options);
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i2++;
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if (type2 === 'directory' && !options.skipSubdirs) {
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if (!options.noDiffSet) {
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subDiffSet = [];
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diffSet.push(subDiffSet);
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}
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comparePromises.push(compare(undefined, entry2, level + 1, pathUtils.join(relativePath, entry2.name), options, statistics, subDiffSet, loopDetector.cloneSymlinkCache(symlinkCache)));
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}
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}
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}
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return Promise.all(comparePromises)
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.then(() => Promise.all(compareFilePromises)
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.then(sameResults => {
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for (let i = 0; i < sameResults.length; i++) {
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const sameResult = sameResults[i];
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if (sameResult.error) {
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return Promise.reject(sameResult.error);
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}
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else {
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const permissionDeniedState = "access-ok";
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options.resultBuilder(sameResult.entry1, sameResult.entry2, sameResult.same ? 'equal' : 'distinct', level, relativePath, options, statistics, sameResult.diffSet, sameResult.reason, permissionDeniedState);
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stats.updateStatisticsBoth(sameResult.entries1, sameResult.entries2, sameResult.same, sameResult.reason, sameResult.type1, permissionDeniedState, statistics, options);
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}
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}
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}));
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});
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}
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module.exports = compare;
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//# sourceMappingURL=compareAsync.js.map
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