croc: add --ignore to ignore folders with strings

Fixes #864

src/cli/cli.go

@@ -78,6 +78,7 @@ func Run() (err error) {
 				&cli.IntFlag{Name: "port", Value: 9009, Usage: "base port for the relay"},
 				&cli.IntFlag{Name: "transfers", Value: 4, Usage: "number of ports to use for transfers"},
 				&cli.BoolFlag{Name: "qrcode", Aliases: []string{"qr"}, Usage: "show receive code as a qrcode"},
+				&cli.StringFlag{Name: "exclude", Value: "", Usage: "exclude files if they contain any of the comma separated strings"},
 			},
 			HelpName: "croc send",
 			Action:   send,
@@ -274,6 +275,13 @@ func send(c *cli.Context) (err error) {
 	if transfersParam == 0 {
 		transfersParam = 4
 	}
+	excludeStrings := []string{}
+	for _, v := range strings.Split(c.String("exclude"), ",") {
+		v = strings.ToLower(strings.TrimSpace(v))
+		if v != "" {
+			excludeStrings = append(excludeStrings, v)
+		}
+	}
 
 	ports := make([]string, transfersParam+1)
 	for i := 0; i <= transfersParam; i++ {
@@ -305,6 +313,7 @@ func send(c *cli.Context) (err error) {
 		GitIgnore:        c.Bool("git"),
 		ShowQrCode:       c.Bool("qrcode"),
 		MulticastAddress: c.String("multicast"),
+		Exclude:          excludeStrings,
 	}
 	if crocOptions.RelayAddress != models.DEFAULT_RELAY {
 		crocOptions.RelayAddress6 = ""
@@ -418,7 +427,7 @@ Or you can go back to the classic croc behavior by enabling classic mode:
 		// generate code phrase
 		crocOptions.SharedSecret = utils.GetRandomName()
 	}
-	minimalFileInfos, emptyFoldersToTransfer, totalNumberFolders, err := croc.GetFilesInfo(fnames, crocOptions.ZipFolder, crocOptions.GitIgnore)
+	minimalFileInfos, emptyFoldersToTransfer, totalNumberFolders, err := croc.GetFilesInfo(fnames, crocOptions.ZipFolder, crocOptions.GitIgnore, crocOptions.Exclude)
 	if err != nil {
 		return
 	}

src/croc/croc.go

@@ -87,6 +87,7 @@ type Options struct {
 	GitIgnore        bool
 	MulticastAddress string
 	ShowQrCode       bool
+	Exclude          []string
 }
 
 type SimpleMessage struct {
@@ -314,7 +315,7 @@ func isChild(parentPath, childPath string) bool {
 
 // This function retrieves the important file information
 // for every file that will be transferred
-func GetFilesInfo(fnames []string, zipfolder bool, ignoreGit bool) (filesInfo []FileInfo, emptyFolders []FileInfo, totalNumberFolders int, err error) {
+func GetFilesInfo(fnames []string, zipfolder bool, ignoreGit bool, exclusions []string) (filesInfo []FileInfo, emptyFolders []FileInfo, totalNumberFolders int, err error) {
 	// fnames: the relative/absolute paths of files/folders that will be transferred
 	totalNumberFolders = 0
 	var paths []string
@@ -379,6 +380,18 @@ func GetFilesInfo(fnames []string, zipfolder bool, ignoreGit bool) (filesInfo []
 		}
 
 		absPath, errAbs := filepath.Abs(fpath)
+		absPathLower := strings.ToLower(absPath)
+		ignorePath := false
+		for _, exclusion := range exclusions {
+			if strings.Contains(absPathLower, exclusion) {
+				ignorePath = true
+				break
+			}
+		}
+		if ignorePath {
+			log.Debugf("Ignoring %s", absPath)
+			continue
+		}
 
 		if errAbs != nil {
 			err = errAbs