propate no-match found nil file after find* channel based queries

Fixes #536.
Updates #528.

src/changes.go

@@ -146,17 +146,18 @@ func (g *Commands) changeListResolve(relToRoot, fsPath string, push bool) (cl, c
 	noClashThreshold := uint64(1)
 
 	for rem := range remotesChan {
-		if rem != nil && anyMatch(g.opts.IgnoreRegexp, rem.Name) {
-			return
+		if rem != nil {
+			if anyMatch(g.opts.IgnoreRegexp, rem.Name) {
+				return
+			}
+			iterCount++
 		}
 
-		iterCount++
-
 		ccl, cclashes, cErr := g.byRemoteResolve(relToRoot, fsPath, rem, push)
 
 		cl = append(cl, ccl...)
 		clashes = append(clashes, cclashes...)
-		if false && cErr != nil {
+		if cErr != nil {
 			err = reComposeError(err, cErr.Error())
 		}
 	}

src/clashes.go

@@ -82,10 +82,16 @@ func findClashesForChildren(g *Commands, parentId, relToRootPath string, depth i
 		memoized[child.Name] = cluster
 	}
 
+	separatorPrefix := relToRootPath
+	if rootLike(separatorPrefix) {
+		// Avoid a situation where you have Join("/", "/", "a") -> "//a"
+		separatorPrefix = ""
+	}
+
 	// To preserve the discovery order
 	for _, commonKey := range discoveryOrder {
 		cluster, _ := memoized[commonKey]
-		fullRelToRootPath := sepJoin(RemoteSeparator, relToRootPath, commonKey)
+		fullRelToRootPath := sepJoin(RemoteSeparator, separatorPrefix, commonKey)
 		nameClashesPresent := len(cluster) > 1
 
 		for _, rem := range cluster {
@@ -226,8 +232,9 @@ func autoRenameClashes(g *Commands, clashes []*Change) error {
 
 	var composedError error
 
+	quot := customQuote
 	for _, r := range renames {
-		message := fmt.Sprintf("Renaming %s %v -> %s\n", r.originalPath, r.change.Src.Id, r.newName)
+		message := fmt.Sprintf("Renaming %s %s -> %s\n", quot(r.originalPath), quot(r.change.Src.Id), quot(r.newName))
 		_, err := g.rem.rename(r.change.Src.Id, r.newName)
 		if err == nil {
 			g.log.Log(message)

src/id.go

@@ -66,6 +66,7 @@ func (g *Commands) Id() (err error) {
 		iterCount := uint64(0)
 		for rem := range remotes {
 			if rem == nil {
+				err = reComposeError(err, fmt.Sprintf("%s does not exist remotely", customQuote(relToRootPath)))
 				continue
 			}
 

src/pull.go

@@ -284,6 +284,7 @@ func (g *Commands) PullPiped(byId bool) (err error) {
 		matches := resolver(relToRootPath)
 		for rem := range matches {
 			if rem == nil {
+				err = reComposeError(err, fmt.Sprintf("%s doesnot exist", customQuote(relToRootPath)))
 				continue
 			}
 
@@ -334,17 +335,18 @@ func (g *Commands) pullById() (cl, clashes []*Change, err error) {
 }
 
 func (g *Commands) pullByPath() (cl, clashes []*Change, err error) {
-	fmt.Println("pullByPath")
 	for _, relToRootPath := range g.opts.Sources {
 		fsPath := g.context.AbsPathOf(relToRootPath)
 		ccl, cclashes, cErr := g.changeListResolve(relToRootPath, fsPath, false)
-		clashes = append(clashes, cclashes...)
-		if cErr != nil && cErr != ErrClashesDetected {
-			return cl, clashes, cErr
+		if len(cclashes) > 0 {
+			clashes = append(clashes, cclashes...)
 		}
 		if len(ccl) > 0 {
 			cl = append(cl, ccl...)
 		}
+		if cErr != nil && cErr != ErrClashesDetected {
+			err = reComposeError(err, cErr.Error())
+		}
 	}
 
 	if len(clashes) >= 1 {

src/push.go

@@ -328,21 +328,20 @@ func (g *Commands) playPushChanges(cl []*Change, opMap *map[Operation]sizeCounte
 func lonePush(g *Commands, parent, absPath, path string) (cl, clashes []*Change, err error) {
 	remotesChan := g.rem.FindByPathM(absPath)
 
-	iterCount := uint64(0)
-	noClashThreshold := uint64(1)
 	var l *File
 	localinfo, _ := os.Stat(path)
 	if localinfo != nil {
 		l = NewLocalFile(path, localinfo)
 	}
 
+	iterCount := uint64(0)
+	noClashThreshold := uint64(1)
+
 	for r := range remotesChan {
-		if r == nil {
-			continue
+		if r != nil {
+			iterCount++
 		}
 
-		iterCount++
-
 		clr := &changeListResolve{
 			push:   true,
 			dir:    parent,

src/remote.go

@@ -299,7 +299,7 @@ func reqDoPage(req *drive.FilesListCall, hidden bool, promptOnPagination bool) c
 		defer close(fileChan)
 
 		pageToken := ""
-		for {
+		for pageIterCount := uint64(0); ; pageIterCount++ {
 			if pageToken != "" {
 				req = req.PageToken(pageToken)
 			}
@@ -319,6 +319,10 @@ func reqDoPage(req *drive.FilesListCall, hidden bool, promptOnPagination bool) c
 			}
 			pageToken = results.NextPageToken
 			if pageToken == "" {
+				if len(results.Items) < 1 && pageIterCount < 1 {
+					// Item absolutely doesn't exist
+					fileChan <- nil
+				}
 				break
 			}