rsync: add integrity information

src/syncer.js

@@ -62,15 +62,14 @@ function ISFILE(x) {
     return (x & fs.constants.S_IFREG) === fs.constants.S_IFREG;
 }
 
-async function sync(dataLayout, options) {
+async function sync(dataLayout, cacheFile) {
     assert(dataLayout instanceof DataLayout, 'Expecting dataLayout to be a DataLayout');
-    assert.strictEqual(typeof options, 'object');
+    assert.strictEqual(typeof cacheFile, 'string');
 
     const addQueue = [], delQueue = []; // separate queues. we have to process the del first and then the add
     let curCacheIndex = 0;
-
-    const cacheFile = options.cacheFile, newCacheFile = `${options.cacheFile}.new`;
-
+    const integrityMap = new Map();
+    const newCacheFile = `${cacheFile}.new`;
     let cache = [];
 
     // if cache is missing or if we crashed/errored in previous run, start out empty. TODO: do a remote listDir and rebuild
@@ -119,6 +118,7 @@ async function sync(dataLayout, options) {
 
             const cachePath = curCacheIndex === cache.length ? null : cache[curCacheIndex].path;
             const cacheStat = curCacheIndex === cache.length ? null : cache[curCacheIndex].stat;
+            integrityMap.set(entryPath, curCacheIndex === cache.length ? null : cache[curCacheIndex].integrity);
 
             if (cachePath === null || cachePath > entryPath) { // new files appeared
                 if (entryStat.isDirectory()) {
@@ -155,15 +155,14 @@ async function sync(dataLayout, options) {
     return {
         delQueue,
         addQueue,
-        cacheFile,
-        newCacheFile
+        integrityMap
     };
 }
 
-async function finalize(changes) {
-    assert.strictEqual(typeof changes, 'object');
+async function finalize(cacheFile) {
+    assert.strictEqual(typeof cacheFile, 'string');
 
-    safe.fs.unlinkSync(changes.cacheFile);
-
-    if (!safe.fs.renameSync(changes.newCacheFile, changes.cacheFile)) debug('Unable to save new cache file');
+    const newCacheFile = `${cacheFile}.new`;
+    safe.fs.unlinkSync(cacheFile);
+    if (!safe.fs.renameSync(newCacheFile, cacheFile)) debug('Unable to save new cache file');
 }