Fixing core tools host (#4417)

Author: aishwaryabh

eng/ci/build-core-tools-host-artifacts-windows.yml

@@ -6,7 +6,7 @@ trigger:
     - main
   paths:
     include:
-      - /host/src/**
+      - /src/CoreToolsHost/**
 
 resources:
   repositories:

eng/ci/consolidate-artifacts.yml

@@ -25,6 +25,7 @@ resources:
   pipelines:
     - pipeline: core-tools-host
       source: azure/azure-functions-core-tools/core-tools-host.official
+      branch: main
 
     - pipeline: core-tools-inproc
       source: azure/azure-functions-core-tools/core-tools.official

src/CoreToolsHost/AppLoader/NetHost.cs

@@ -7,7 +7,7 @@ namespace CoreToolsHost
 {
     internal class NetHost
     {
-        [DllImport("nethost", CharSet = CharSet.Auto)]
+        [DllImport("nethost", EntryPoint = "get_hostfxr_path", CharSet = CharSet.Auto)]
         private static extern unsafe int GetHostFXRPath(
         [Out] char[] buffer,
         [In] ref int buffer_size,

src/CoreToolsHost/Environment/EnvironmentUtils.cs

@@ -7,7 +7,7 @@ internal static class EnvironmentUtils
     {
 #if OS_LINUX
         [System.Runtime.InteropServices.DllImport("libc")]
-        private static extern int setenv(string name, string value, int overwrite);
+        private static extern int SetEnv(string name, string value, int overwrite);
 #endif
 
         /// <summary>
@@ -28,7 +28,7 @@ internal static void SetValue(string name, string value)
              *  So using the native method directly here.
              * */
 #if OS_LINUX
-            setenv(name, value, 1);
+            SetEnv(name, value, 1);
 #else
             Environment.SetEnvironmentVariable(name, value);
 #endif