Add environment.process path (#485)

Author: SimonCropp

api_list.include.md

@@ -235,6 +235,7 @@
 #### Environment
 
  * `ProcessId` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.environment.processid?view=net-11.0#system-environment-processid)
+ * `ProcessPath` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.environment.processpath?view=net-11.0#system-environment-processpath)
 
 
 #### EventInfo

src/Consume/Consume.cs

@@ -551,6 +551,11 @@ void Enum_Methods()
         values = Enum.GetValuesAsUnderlyingType<DayOfWeek>();
     }
 
+    void Environment_Methods()
+    {
+        var processPath = Environment.ProcessPath;
+    }
+
     void EnumerationOptions_Methods()
     {
         var options = new EnumerationOptions

src/Polyfill/EnvironmentPolyfill.cs

@@ -1,12 +1,11 @@
-#if !NET5_0_OR_GREATER
-
 namespace Polyfills;
 
 using System;
 using System.Diagnostics;
 
 static partial class Polyfill
 {
+#if !NET5_0_OR_GREATER
     static int processId;
 
     extension(Environment)
@@ -29,5 +28,30 @@ public static int ProcessId
             }
         }
     }
-}
 #endif
+
+#if !NET6_0_OR_GREATER
+    static string? processPath;
+
+    extension(Environment)
+    {
+        /// <summary>
+        /// Gets the path of the executable that started the currently executing process.
+        /// </summary>
+        //Link: https://learn.microsoft.com/en-us/dotnet/api/system.environment.processpath?view=net-11.0#system-environment-processpath
+        public static string? ProcessPath
+        {
+            get
+            {
+                if (processPath is null)
+                {
+                    using var process = Process.GetCurrentProcess();
+                    processPath = process.MainModule?.FileName;
+                }
+
+                return processPath;
+            }
+        }
+    }
+#endif
+}

src/Split/net461/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }

src/Split/net462/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }

src/Split/net47/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }

src/Split/net471/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }

src/Split/net472/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }

src/Split/net48/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }

src/Split/net481/EnvironmentPolyfill.cs

@@ -24,4 +24,23 @@ public static int ProcessId
 			}
 		}
 	}
+	static string? processPath;
+	extension(Environment)
+	{
+		/// <summary>
+		/// Gets the path of the executable that started the currently executing process.
+		/// </summary>
+		public static string? ProcessPath
+		{
+			get
+			{
+				if (processPath is null)
+				{
+					using var process = Process.GetCurrentProcess();
+					processPath = process.MainModule?.FileName;
+				}
+				return processPath;
+			}
+		}
+	}
 }