1 files changed, 95 insertions, 0 deletions
diff --git a/src/Constants/Config.cs b/src/Constants/Config.cs
new file mode 100644
index 0000000..fc35928
--- /dev/null
+++ b/src/Constants/Config.cs
@@ -0,0 +1,95 @@
+using System;
+using System.IO;
+using System.Linq;
+
+using Serilog;
+using Serilog.Core;
+
+using VNLib.Tools.Build.Executor.Model;
+
+namespace VNLib.Tools.Build.Executor.Constants
+{
+
+    internal static class Config
+    {
+
+        //relative local directores to the project root
+        public const string BUILD_DIR_NAME = ".build";
+        public const string LOG_DIR_NAME = ".build/log";
+        public const string BUILD_CONFIG = "build.conf.json";
+        public const string SCRATCH_DIR = ".build/scratch";
+        public const string SUM_DIR = ".build/sums";
+        public const string OUTPUT_DIR = ".build/output";
+        public const string SLEET_DIR = ".build/feed";
+
+        /// <summary>
+        /// Gets the system wide <see cref="Logger"/> log writer instance
+        /// </summary>
+        public static Logger Log { get; } = GetLog();
+
+        const string Template = "{Message:lj}{NewLine}{Exception}";
+
+        private static Logger GetLog()
+        {
+            string[] args = Environment.GetCommandLineArgs();
+
+            LoggerConfiguration conf = new();
+
+            if (args.Contains("-v") || args.Contains("--verbose"))
+            {
+                //Check for verbose logging level
+                conf.MinimumLevel.Verbose();
+            }
+            else if (args.Contains("-d") || args.Contains("--debug"))
+            {
+                //Check for debug
+                conf.MinimumLevel.Debug();
+            }
+            else
+            {
+                //Default information level
+                conf.MinimumLevel.Information();
+            }
+
+            //Create a console logger unless the silent flag is set
+            if (!args.Contains("-s"))
+            {
+                conf.WriteTo.Console(outputTemplate: Template);
+            }
+
+            //Creat the new log file
+            string logFilePath = Path.Combine(LOG_DIR_NAME, $"{DateTimeOffset.Now.ToUnixTimeSeconds()}-log.txt");
+
+            //Setup the log file output
+            conf.WriteTo.File(logFilePath, outputTemplate: Template);
+
+            return conf.CreateLogger();
+        }
+
+        /// <summary>
+        /// Cleans up old build log files, so that only 100 log files remain in the log directory
+        /// </summary>
+        public static void TrimLogs(IDirectoryIndex dirIndex, int maxLogs)
+        {
+            try
+            {
+                //Get all log files in the log directory and cleanup any files after the max log count
+                FileInfo[] toDelete = dirIndex.LogDir.EnumerateFiles("*.txt", SearchOption.TopDirectoryOnly)
+                    .OrderByDescending(static f => f.LastWriteTimeUtc)
+                    .Skip(maxLogs)
+                    .ToArray();
+
+                foreach (FileInfo file in toDelete)
+                {
+                    file.Delete();
+                }
+
+                Log.Debug("Cleaned {file} log files", toDelete.Length);
+            }
+            catch (Exception ex)
+            {
+                Log.Warning(ex, "Failed to cleanup log files");
+            }
+        }
+    }
+}
+\ No newline at end of file