Update: Fixing some bugs from compiler inference after optimization

Author: MrcSnm

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       - uses: MrcSnm/setup-dlang@v2
         with:
           compiler: ldc-latest
-          redub: master
+          redub: latest
 
       - name: Build
         if: runner.os != 'macOS'

source/redub/misc/find_executable.d

@@ -53,5 +53,5 @@ string findExecutable(string executableName)
         }
 
     }
-    return "";
+    return null;
 }

source/redub/tooling/compilers_inference.d

@@ -123,18 +123,27 @@ private string getActualCompilerToUse(string preferredCompiler, ref string actua
     import std.typecons;
     import std.process;
     import redub.logging;
-    import std.path: baseName, stripExtension;
+    import std.path: baseName, stripExtension, isAbsolute;
+    import redub.misc.find_executable;
     Tuple!(int, "status", string, "output") compVersionRes;
+    compVersionRes.status = 1;
+    compVersionRes.output = "No compiler found.";
 
     bool preferredTested = false;
     foreach(string searchable; preferredCompiler~searchableCompilers)
     {
-        if(preferredTested && searchable == preferredCompiler)
+        if((preferredTested && searchable == preferredCompiler) || searchable.length == 0)
             continue;
         if(searchable != preferredCompiler)
             searchable = tryGetCompilerOnCwd(searchable);
         else
             preferredTested = true;
+        if(!isAbsolute(searchable))
+        {
+            searchable = findExecutable(searchable);
+            if(searchable.length == 0)
+                continue;
+        }
 
         string[2] versionCommand = [searchable, "--version"];
         size_t args = searchable.baseName.stripExtension != "cl" ? 2 : 1;