[post build lint] Check if vcpkg_fixup_pkgconfig was called

src/vcpkg/postbuildlint.cpp

@@ -851,6 +851,42 @@ namespace vcpkg::PostBuildLint
         return LintStatus::SUCCESS;
     }
 
+    static LintStatus check_prefix_in_pkgconfig_files(const Filesystem& fs, const Path& dir)
+    {
+        std::vector<Path> pkgconfig_files = fs.get_files_recursive(dir, IgnoreErrors{});
+        Util::erase_remove_if(pkgconfig_files, [](const Path& path) {
+            return !(path.extension() == ".pc" && Path(path.parent_path()).filename() == "pkgconfig");
+        });
+        print2("Es gibt ", pkgconfig_files.size(), " dateien\n");
+        Util::erase_remove_if(pkgconfig_files, [&fs](const Path& path) {
+            for (const auto& line : fs.read_lines(path, VCPKG_LINE_INFO))
+            {
+                if (Strings::starts_with(line, "prefix="))
+                {
+                    if (Strings::starts_with(line, "prefix=$"))
+                    {
+                        return true;
+                    }
+                    // the prefix was not replaced by us, so it is probably wrong (absolute path)
+                    return false;
+                }
+            }
+            return true; // the file has no "prefix=" file, ignoring that file
+        });
+
+        if (!pkgconfig_files.empty())
+        {
+            print2(Color::warning,
+                   "There are pkgconfig files that should be fixed.\n"
+                   "Use the following command in the portfile to fix this issue:\n"
+                   "\n"
+                   "    vcpkg_fixup_pkgconfig()\n"
+                   "\n");
+            return LintStatus::ERROR_DETECTED;
+        }
+        return LintStatus::SUCCESS;
+    }
+
     static void operator+=(size_t& left, const LintStatus& right) { left += static_cast<size_t>(right); }
 
     static size_t perform_all_checks_and_return_error_count(const PackageSpec& spec,
@@ -971,6 +1007,7 @@ namespace vcpkg::PostBuildLint
         error_count += check_no_empty_folders(fs, package_dir);
         error_count += check_no_files_in_dir(fs, package_dir);
         error_count += check_no_files_in_dir(fs, package_dir / "debug");
+        error_count += check_prefix_in_pkgconfig_files(fs, package_dir);
 
         return error_count;
     }