testing: for CI only, trim PWD from the oslc -M output

Signed-off-by: Larry Gritz <[email protected]>

src/liboslcomp/oslcomp.cpp

@@ -594,14 +594,24 @@ OSLCompilerImpl::write_dependency_file(string_view filename)
                          : OIIO::Filesystem::fopen(m_deps_filename, "w"));
     if (depfile) {
         OSL::print(depfile, "{}: {}", target, filename);
-        for (const auto& dep : m_file_dependencies) {
+        for (ustring dep : m_file_dependencies) {
             if (OIIO::Strutil::ends_with(dep, "stdosl.h")
                 && !m_generate_system_deps)
                 continue;  // skip system headers if so instructed
             if (OIIO::Strutil::starts_with(dep, "<"))
                 continue;  // skip pseudo files
             if (dep == filename)
                 continue;  // skip this file, since we already put it first
+#if defined(_WIN32) && defined(OSL_CI)
+            // Special behavior for CI on Windows: remove the directory paths
+            // for the dependencies, or else it won't match the reference
+            // output.
+            std::string cwd = OIIO::Filesystem::current_path() + "/";
+            auto d = OIIO::Strutil::replace::replace(dep, "\\\\", "/", true);
+            d      = OIIO::Strutil::replace::replace(d, cwd, "");
+            dep    = ustring(d);
+            OSL::print(depfile, " \\\n  ({})", cwd);
+#endif
             OSL::print(depfile, " \\\n  {}", dep);
         }
         OSL::print(depfile, "\n");