C#: Rename DotnetCommand to DotNetCliInvoker.

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/DotNetCliInvoker.cs

@@ -0,0 +1,53 @@
+using System.Collections.Generic;
+using System.Diagnostics;
+using Semmle.Util;
+
+namespace Semmle.Extraction.CSharp.DependencyFetching
+{
+    /// <summary>
+    /// Low level utilities to run the "dotnet" command.
+    /// </summary>
+    internal sealed class DotNetCliInvoker : IDotNetCliInvoker
+    {
+        private readonly ProgressMonitor progressMonitor;
+
+        public string Exec { get; }
+
+        public DotNetCliInvoker(ProgressMonitor progressMonitor, string exec)
+        {
+            this.progressMonitor = progressMonitor;
+            this.Exec = exec;
+        }
+
+        private ProcessStartInfo MakeDotnetStartInfo(string args, bool redirectStandardOutput)
+        {
+            var startInfo = new ProcessStartInfo(Exec, args)
+            {
+                UseShellExecute = false,
+                RedirectStandardOutput = redirectStandardOutput
+            };
+            // Set the .NET CLI language to English to avoid localized output.
+            startInfo.EnvironmentVariables["DOTNET_CLI_UI_LANGUAGE"] = "en";
+            return startInfo;
+        }
+
+        private bool RunCommandAux(string args, bool redirectStandardOutput, out IList<string> output)
+        {
+            progressMonitor.RunningProcess($"{Exec} {args}");
+            var pi = MakeDotnetStartInfo(args, redirectStandardOutput);
+            var exitCode = pi.ReadOutput(out output);
+            if (exitCode != 0)
+            {
+                progressMonitor.CommandFailed(Exec, args, exitCode);
+                return false;
+            }
+            return true;
+        }
+
+        public bool RunCommand(string args) =>
+            RunCommandAux(args, redirectStandardOutput: false, out _);
+
+        public bool RunCommand(string args, out IList<string> output) =>
+            RunCommandAux(args, redirectStandardOutput: true, out output);
+    }
+}