Implement the rclone cat command

cmd/all/all.go

@@ -5,6 +5,7 @@ import (
 	// Active commands
 	_ "github.com/ncw/rclone/cmd"
 	_ "github.com/ncw/rclone/cmd/authorize"
+	_ "github.com/ncw/rclone/cmd/cat"
 	_ "github.com/ncw/rclone/cmd/check"
 	_ "github.com/ncw/rclone/cmd/cleanup"
 	_ "github.com/ncw/rclone/cmd/config"

cmd/cat/cat.go

@@ -0,0 +1,40 @@
+package cat
+
+import (
+	"os"
+
+	"github.com/ncw/rclone/cmd"
+	"github.com/ncw/rclone/fs"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	cmd.Root.AddCommand(catCmd)
+}
+
+var catCmd = &cobra.Command{
+	Use:   "cat remote:path",
+	Short: `Concatenates any files and sends them to stdout.`,
+	Long: `
+rclone cat sends any files to standard output.
+
+You can use it like this to output a single file
+
+    rclone cat remote:path/to/file
+
+Or like this to output any file in dir or subdirectories.
+
+    rclone cat remote:path/to/dir
+
+Or like this to output any .txt files in dir or subdirectories.
+
+    rclone --include "*.txt" cat remote:path/to/dir
+`,
+	Run: func(command *cobra.Command, args []string) {
+		cmd.CheckArgs(1, 1, command, args)
+		fsrc := cmd.NewFsSrc(args)
+		cmd.Run(false, command, func() error {
+			return fs.Cat(fsrc, os.Stdout)
+		})
+	},
+}