fix: properly handle runfiles paths in rust_wasm_component_test

- Replace runfiles library approach with direct path searching
- Support common runfiles directory layouts in test scripts
- Handle both local and CI execution environments
- Fix wasm-tools binary path resolution issues

Author: avrabe

MODULE.bazel.lock

@@ -15,22 +15,81 @@ def _rust_wasm_component_test_impl(ctx):
     toolchain = ctx.toolchains["@rules_wasm_component//toolchains:wasm_tools_toolchain_type"]
     wasm_tools = toolchain.wasm_tools
 
-    # Generate test script
-    ctx.actions.write(
-        output = test_script,
-        content = """#!/bin/bash
+    # Generate test script that uses runfiles
+    script_content = """#!/bin/bash
 set -e
 
+# Get the runfiles directory
+if [[ -n "${{RUNFILES_DIR}}" ]]; then
+  RUNFILES="${{RUNFILES_DIR}}"
+elif [[ -n "${{RUNFILES_MANIFEST_FILE}}" ]]; then
+  RUNFILES="$(dirname "${{RUNFILES_MANIFEST_FILE}}")"
+else
+  RUNFILES="${{BASH_SOURCE[0]}}.runfiles"
+fi
+
+# Look for wasm-tools in common locations
+WASM_TOOLS=""
+for path in \\
+  "${{RUNFILES}}/{wasm_tools_workspace}/{wasm_tools_path}" \\
+  "${{RUNFILES}}/{wasm_tools_path}" \\
+  "${{RUNFILES}}/_main/{wasm_tools_path}" \\
+  "${{RUNFILES}}/../{wasm_tools_workspace}/{wasm_tools_path}" \\
+  "${{RUNFILES}}/../{wasm_tools_path}"; do
+  if [[ -f "${{path}}" ]]; then
+    WASM_TOOLS="${{path}}"
+    break
+  fi
+done
+
+if [[ -z "${{WASM_TOOLS}}" ]]; then
+  echo "ERROR: Cannot find wasm-tools binary" >&2
+  echo "Searched in:" >&2
+  echo "  ${{RUNFILES}}/{wasm_tools_workspace}/{wasm_tools_path}" >&2
+  echo "  ${{RUNFILES}}/{wasm_tools_path}" >&2
+  echo "  ${{RUNFILES}}/_main/{wasm_tools_path}" >&2
+  echo "  ${{RUNFILES}}/../{wasm_tools_workspace}/{wasm_tools_path}" >&2
+  echo "  ${{RUNFILES}}/../{wasm_tools_path}" >&2
+  exit 1
+fi
+
+# Look for component in common locations
+COMPONENT_WASM=""
+for path in \\
+  "${{RUNFILES}}/{component_workspace}/{component_path}" \\
+  "${{RUNFILES}}/{component_path}" \\
+  "${{RUNFILES}}/_main/{component_path}"; do
+  if [[ -f "${{path}}" ]]; then
+    COMPONENT_WASM="${{path}}"
+    break
+  fi
+done
+
+if [[ -z "${{COMPONENT_WASM}}" ]]; then
+  echo "ERROR: Cannot find component WASM file" >&2
+  echo "Searched in:" >&2
+  echo "  ${{RUNFILES}}/{component_workspace}/{component_path}" >&2
+  echo "  ${{RUNFILES}}/{component_path}" >&2
+  echo "  ${{RUNFILES}}/_main/{component_path}" >&2
+  exit 1
+fi
+
 # Validate component
 echo "Validating WASM component..."
-{wasm_tools} validate {component_wasm}
+"${{WASM_TOOLS}}" validate "${{COMPONENT_WASM}}"
 
 # TODO: Run component with wasmtime if available
 echo "✅ Component validation passed"
 """.format(
-            wasm_tools = wasm_tools.path,
-            component_wasm = component_info.wasm_file.path,
-        ),
+        wasm_tools_workspace = wasm_tools.owner.workspace_name if wasm_tools.owner else "_main",
+        wasm_tools_path = wasm_tools.short_path,
+        component_workspace = component_info.wasm_file.owner.workspace_name if component_info.wasm_file.owner else "_main",
+        component_path = component_info.wasm_file.short_path,
+    )
+    
+    ctx.actions.write(
+        output = test_script,
+        content = script_content,
         is_executable = True,
     )