#1 - fixes ignored command line argument

CloudWatchLogDownloader/Models/CommandOptions.cs

@@ -17,6 +17,9 @@ namespace CloudWatchLogDownloader.Models
         [ValueOption(2)]
         public string OutputFilePath { get; set; }
 
+        [Option('l', "liveStream", HelpText="Keep pulling logs until Ctrl+C is applied")]
+        public bool LiveStream { get; set; }
+
         [ParserState]
         public IParserState ParserState { get; set; }
 

CloudWatchLogDownloader/Program.cs

@@ -19,7 +19,7 @@ namespace CloudWatchLogDownloader
                 client = new AmazonCloudWatchLogsClient();
                 var logGroup = GetLogGroup(opt.LogGroup);
                 var logStream = GetLogStream(logGroup, opt.LogStream);
-                WriteLogToFile(logGroup, logStream, opt.OutputFilePath);
+                WriteLogToFile(logGroup, logStream, opt.LiveStream, opt.OutputFilePath);
             }
         }
 
@@ -80,7 +80,7 @@ namespace CloudWatchLogDownloader
                     allStreams = allStreams.Where(x => x.LogStreamName.StartsWith(logStream)).ToList();
                 }
 
-                allStreams = allStreams.OrderBy(x => x.CreationTime).ToList();
+                allStreams = allStreams.OrderByDescending(x => x.CreationTime).ToList();
 
                 for (int i = 0, len = allStreams.Count; i < len; ++i)
                     Console.WriteLine(i + ") " + allStreams[i].LogStreamName);
@@ -99,15 +99,28 @@ namespace CloudWatchLogDownloader
             return ls;
         }
 
-        private static void WriteLogToFile(LogGroup logGroup, LogStream logStream, string outputFilePath = null)
+        private static void WriteLogToFile(LogGroup logGroup, LogStream logStream, bool liveStream, string outputFilePath = null)
         {
-            Console.WriteLine("Choose Output file [logs/" + logStream.LogStreamName + ".log]: ");
-            var output = Console.ReadLine();
-            if (string.IsNullOrWhiteSpace(output))
-                output = "logs/" + logStream.LogStreamName + ".log";
+            string output = null;
+            if (string.IsNullOrWhiteSpace(outputFilePath))
+            {
+                Console.WriteLine("Choose Output file [logs/" + logStream.LogStreamName + ".log]: ");
+                output = Console.ReadLine();
+                if (string.IsNullOrWhiteSpace(output))
+                    output = "logs/" + logStream.LogStreamName + ".log";
+            }
+            else
+            {
+                output = outputFilePath;
+            }
+
             if (!Directory.GetParent(output).Exists)
                 Directory.CreateDirectory(Directory.GetParent(output).FullName);
 
+            Console.WriteLine("Downloading log into " + output);
+
+            bool lsMessage = !liveStream;
+
             using (StreamWriter sw = new StreamWriter(output))
             {
                 GetLogEventsResponse leResponse = null;
@@ -125,7 +138,17 @@ namespace CloudWatchLogDownloader
                         sw.WriteLine(ev.Message);
 
                     sw.Flush();
-                } while (leResponse.NextForwardToken != null && leResponse.Events.Any());
+
+                    if (!leResponse.Events.Any() && !lsMessage)
+                    {
+                        lsMessage = true;
+                        ConsoleColor oldcolor = Console.ForegroundColor;
+                        Console.ForegroundColor = ConsoleColor.Yellow;
+                        Console.WriteLine("Now streaming live from lg: " + logGroup.LogGroupName + " ls: " + logStream.LogStreamName + " into " + output);
+                        Console.ForegroundColor = oldcolor;
+                        Console.WriteLine("{0}{0}Press CTRL+C to stop...", Environment.NewLine);
+                    }
+                } while ((leResponse.NextForwardToken != null && leResponse.Events.Any()) || liveStream);
             }
         }
 

README.md

@@ -0,0 +1,24 @@
+# CloudWatchLogDownloader
+Download full logs from AWS CloudWatch
+
+## Who is it for?
+For idiots like me who just want a text dump of the cloud watch log without going through S3
+
+## Why .NET?
+Because I was working with the .NET AWSSDK when writing this.
+
+## Why not .NET CORE?
+Because the AWSSDK.CloudWatchLogs nuget package doesn't support it. (As of writing this README)
+
+## Usage
+If you're still reading this means you want to use this abomination... Good.
+
+### Command line params
+|short|long|Description|
+|-----|----|-----------|
+|-g|--logGroup|The log group you want to select the stream from, can end with '*' in which case the option to choose from all groups starting with this will be given|
+|-s|--logStream|The log stream you want to save, can end with '*' in which case the option to choose from all groups starting with this will be given|
+|-o|--outputFile|The file to output the logs to.|
+|-l|--liveStream|After reaching the newest log keep polling until ctrl+c is pressed|
+
+If any of the above are not specified the program will prompt for them