Don't emit a warning from resolver and decoder if the file does not exist

It simply means that the file does not exist for some external reason.
For example, in execroot it can be deleted because of another build.
Or path might be received from provider via aspect, so it could be
a provider issue.

Author: ujohnny

base/src/com/google/idea/blaze/base/sync/workspace/ArtifactLocationDecoderImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 The Bazel Authors. All rights reserved.
+ * Copyright 2025 The Bazel Authors. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@
 import com.intellij.openapi.util.io.FileUtil;
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Objects;
@@ -93,6 +94,12 @@ public File decode(ArtifactLocation artifactLocation) {
   private @Nullable File tryToResolveExternalArtifactToMainWorkspace(ArtifactLocation artifactLocation) {
     if (artifactLocation.isExternal()) {
       try {
+        Path estimatedLocation = blazeInfo.getExecutionRoot().toPath().resolve(artifactLocation.getExecutionRootRelativePath());
+        if (!Files.exists(estimatedLocation)) {
+          LOG.info("Cannot resolve " + estimatedLocation + " because it does not exist");
+          return null;
+        }
+
         File realFile = blazeInfo.getExecutionRoot().toPath()
             .resolve(artifactLocation.getExecutionRootRelativePath()).toRealPath().toFile();
         if (pathResolver.getWorkspacePath(realFile) != null) {

base/src/com/google/idea/blaze/base/sync/workspace/ExecutionRootPathResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 The Bazel Authors. All rights reserved.
+ * Copyright 2025 The Bazel Authors. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,6 +28,8 @@
 import com.intellij.openapi.project.Project;
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import javax.annotation.Nullable;
 import org.jetbrains.annotations.NotNull;
 
@@ -158,14 +160,19 @@ public ImmutableList<File> resolveToIncludeDirectories(ExecutionRootPath path) {
   public ImmutableList<File> resolveToExternalWorkspaceWithSymbolicLinkResolution(
       ExecutionRootPath path) {
     File fileInExecutionRoot = path.getFileRootedAt(outputBase);
-
-    try {
-      File realPath = fileInExecutionRoot.toPath().toRealPath().toFile();
-      if (workspacePathResolver.getWorkspacePath(realPath) != null) {
-        return ImmutableList.of(realPath);
+    Path pathInExecutionRoot = fileInExecutionRoot.toPath();
+    if (!Files.exists(pathInExecutionRoot)) {
+      LOG.info("Cannot resolve " + pathInExecutionRoot + " because it does not exist");
+    }
+    else {
+      try {
+        File realPath = pathInExecutionRoot.toRealPath().toFile();
+        if (workspacePathResolver.getWorkspacePath(realPath) != null) {
+          return ImmutableList.of(realPath);
+        }
+      } catch (IOException ioException) {
+        LOG.warn("Failed to resolve real path for " + fileInExecutionRoot, ioException);
       }
-    } catch (IOException ioException) {
-      LOG.warn("Failed to resolve real path for " + fileInExecutionRoot, ioException);
     }
 
     return ImmutableList.of(fileInExecutionRoot);