rethrow file and directory think exceptions with proper information

ExtremelySimpleLogger/DirectorySink.cs

@@ -36,9 +36,14 @@ namespace ExtremelySimpleLogger {
         public DirectorySink(DirectoryInfo directory, int maxFiles = 10, bool reopenOnWrite = false, string dateFormat = DefaultDateFormat) {
             this.reopenOnWrite = reopenOnWrite;
 
+            try {
                 if (!directory.Exists)
                     directory.Create();
+            } catch (Exception e) {
+                throw new IOException($"Failed to create directory sink directory {directory}", e);
+            }
 
+            try {
                 // delete old files
                 var files = directory.GetFiles();
                 if (files.Length >= maxFiles) {
@@ -49,11 +54,14 @@ namespace ExtremelySimpleLogger {
                         ordered.RemoveAt(0);
                     }
                 }
+            } catch (Exception e) {
+                throw new IOException($"Failed to delete old files in directory sink {directory}", e);
+            }
 
             var date = DateTime.Now.ToString(dateFormat);
             this.file = new FileInfo(Path.Combine(directory.FullName, $"{date}.txt"));
             if (!reopenOnWrite) {
-                this.writer = this.file.AppendText();
+                this.writer = this.Append();
                 this.writer.AutoFlush = true;
             }
         }
@@ -67,7 +75,7 @@ namespace ExtremelySimpleLogger {
         protected override void Log(Logger logger, LogLevel level, string s) {
             lock (this.file) {
                 if (this.reopenOnWrite) {
-                    using (var w = this.file.AppendText())
+                    using (var w = this.Append())
                         w.WriteLine(s);
                 } else {
                     this.writer.WriteLine(s);
@@ -86,5 +94,13 @@ namespace ExtremelySimpleLogger {
             }
         }
 
+        private StreamWriter Append() {
+            try {
+                return this.file.AppendText();
+            } catch (Exception e) {
+                throw new IOException($"Failed to append to directory sink file {this.file}", e);
+            }
+        }
+
     }
 }

ExtremelySimpleLogger/FileSink.cs

@@ -1,3 +1,4 @@
+using System;
 using System.IO;
 
 namespace ExtremelySimpleLogger {
@@ -33,15 +34,23 @@ namespace ExtremelySimpleLogger {
             this.reopenOnWrite = reopenOnWrite;
             this.file = file;
 
+            try {
                 var dir = file.Directory;
                 if (dir != null && !dir.Exists)
                     dir.Create();
+            } catch (Exception e) {
+                throw new IOException($"Failed to create directory for file sink {file}", e);
+            }
 
+            try {
                 if (file.Exists && (!append || file.Length >= fileSizeLimit))
                     file.Delete();
+            } catch (Exception e) {
+                throw new IOException($"Failed to delete file sink file {file}", e);
+            }
 
             if (!reopenOnWrite) {
-                this.writer = file.AppendText();
+                this.writer = this.Append();
                 this.writer.AutoFlush = true;
             }
         }
@@ -55,7 +64,7 @@ namespace ExtremelySimpleLogger {
         protected override void Log(Logger logger, LogLevel level, string s) {
             lock (this.file) {
                 if (this.reopenOnWrite) {
-                    using (var w = this.file.AppendText())
+                    using (var w = this.Append())
                         w.WriteLine(s);
                 } else {
                     this.writer.WriteLine(s);
@@ -74,5 +83,13 @@ namespace ExtremelySimpleLogger {
             }
         }
 
+        private StreamWriter Append() {
+            try {
+                return this.file.AppendText();
+            } catch (Exception e) {
+                throw new IOException($"Failed to append to file sink {this.file}", e);
+            }
+        }
+
     }
 }