chore: Suppress exception thrown internally on mono is not installed environment (#2966)

* chore: suppress exception thrown on mono is not installed environment

* chore: reflect the reviewed content

* chore: reflect reviewed content. and remove redirect stdout

Author: filzrev

src/BenchmarkDotNet/Environments/HostEnvironmentInfo.cs

@@ -75,7 +75,7 @@ protected HostEnvironmentInfo()
             ChronometerFrequency = Chronometer.Frequency;
             HardwareTimerKind = Chronometer.HardwareTimerKind;
             DotNetSdkVersion = new Lazy<string>(DotNetCliCommandExecutor.GetDotNetSdkVersion);
-            IsMonoInstalled = new Lazy<bool>(() => ProcessHelper.RunAndReadOutput("mono", "--version").IsNotBlank());
+            IsMonoInstalled = new Lazy<bool>(() => ProcessHelper.TestCommandExists("mono"));
             AntivirusProducts = new Lazy<ICollection<Antivirus>>(RuntimeInformation.GetAntivirusProducts);
             VirtualMachineHypervisor = new Lazy<VirtualMachineHypervisor>(RuntimeInformation.GetVirtualMachineHypervisor);
             Os = new Lazy<OsInfo>(OsDetector.GetOs);

src/BenchmarkDotNet/Helpers/ProcessHelper.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics;
+using BenchmarkDotNet.Detectors;
 using BenchmarkDotNet.Loggers;
 
 namespace BenchmarkDotNet.Helpers
@@ -79,5 +80,44 @@ internal static (int exitCode, ImmutableArray<string> output) RunAndReadOutputLi
                 return (process.ExitCode, output);
             }
         }
+
+        internal static bool TestCommandExists(string commandName, string arguments = "--version")
+        {
+            // Check command existence by using where/which command.
+            try
+            {
+                using var process = Process.Start(new ProcessStartInfo
+                {
+                    FileName = OsDetector.IsWindows() ? "where" : "which",
+                    Arguments = commandName,
+                    UseShellExecute = false,
+                    CreateNoWindow = true
+                })!;
+                process.WaitForExit();
+                return process.ExitCode == 0;
+            }
+            catch
+            {
+                // On some environment. which command is not installed. (e.g. Alpine Linux)
+            }
+
+            // Check command existence by executing actual command with --version argument.
+            try
+            {
+                using var process = Process.Start(new ProcessStartInfo
+                {
+                    FileName = commandName,
+                    Arguments = arguments,
+                    UseShellExecute = false,
+                    CreateNoWindow = true
+                })!;
+                process.WaitForExit();
+                return process.ExitCode == 0;
+            }
+            catch
+            {
+                return false;
+            }
+        }
     }
 }