Make aconfig c++ generate only one header and only one .cc file

Bug: 283479529
Test: m aconfig_hello_world_cc && adb push $TOP/out/target/product/panther/system/bin/aconfig_hello_world_cc /system/bin && adb shell aconfig_hello_world_cc
Change-Id: I1890aff70262343e18a62fb2efb2fd0e13a48fb2
diff --git a/tools/aconfig/templates/c_exported_header.template b/tools/aconfig/templates/c_exported_header.template
deleted file mode 100644
index ca812a7..0000000
--- a/tools/aconfig/templates/c_exported_header.template
+++ /dev/null
@@ -1,21 +0,0 @@
-#pragma once
-
-#ifdef __cplusplus
-extern "C" \{
-#endif
-
-{{ for item in class_elements }}
-bool {header}_{item.flag_name}();
-
-{{ if for_test }}
-void set_{header}_{item.flag_name}(bool val);
-{{ -endif }}
-{{ endfor - }}
-
-{{ if for_test }}
-void {header}_reset_flags();
-{{ -endif }}
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/tools/aconfig/templates/c_source_file.template b/tools/aconfig/templates/c_source_file.template
deleted file mode 100644
index 384221d..0000000
--- a/tools/aconfig/templates/c_source_file.template
+++ /dev/null
@@ -1,28 +0,0 @@
-#include "{header}_c.h"
-#include "{header}.h"
-
-{{ for item in class_elements}}
-bool {header}_{item.flag_name}() \{
-    {{ if for_test }}
-    return {cpp_namespace}::{item.flag_name}();
-    {{ -else- }}
-    {{ if not item.readwrite- }}
-    return {item.default_value};
-    {{ -else- }}
-    return {cpp_namespace}::{item.flag_name}();
-    {{ -endif }}
-    {{ -endif }}
-}
-
-{{ if for_test }}
-void set_{header}_{item.flag_name}(bool val) \{
-    {cpp_namespace}::{item.flag_name}(val);
-}
-{{ -endif }}
-{{ endfor -}}
-
-{{ if for_test }}
-void {header}_reset_flags() \{
-     {cpp_namespace}::reset_flags();
-}
-{{ -endif }}
diff --git a/tools/aconfig/templates/cpp_exported_header.template b/tools/aconfig/templates/cpp_exported_header.template
index cd01853..4d56dbc 100644
--- a/tools/aconfig/templates/cpp_exported_header.template
+++ b/tools/aconfig/templates/cpp_exported_header.template
@@ -1,5 +1,7 @@
 #pragma once
 
+#ifdef __cplusplus
+
 #include <memory>
 
 namespace {cpp_namespace} \{
@@ -47,4 +49,25 @@
     return provider_->reset_flags();
 }
 {{ -endif }}
+
 }
+
+extern "C" \{
+#endif // __cplusplus
+
+{{ for item in class_elements }}
+bool {header}_{item.flag_name}();
+
+{{ if for_test }}
+void set_{header}_{item.flag_name}(bool val);
+{{ -endif }}
+{{ endfor - }}
+
+{{ if for_test }}
+void {header}_reset_flags();
+{{ -endif }}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
diff --git a/tools/aconfig/templates/cpp_prod_flag_provider.template b/tools/aconfig/templates/cpp_prod_flag_provider.template
deleted file mode 100644
index f908f12..0000000
--- a/tools/aconfig/templates/cpp_prod_flag_provider.template
+++ /dev/null
@@ -1,24 +0,0 @@
-#pragma once
-
-#include "{header}.h"
-{{ if readwrite }}
-#include <server_configurable_flags/get_flags.h>
-{{ endif }}
-
-namespace {cpp_namespace} \{
-class flag_provider : public flag_provider_interface \{
-public:
-    {{ for item in class_elements}}
-    virtual bool {item.flag_name}() override \{
-        {{ if item.readwrite- }}
-        return server_configurable_flags::GetServerConfigurableFlag(
-            "{item.device_config_namespace}",
-            "{item.device_config_flag}",
-            "{item.default_value}") == "true";
-        {{ -else- }}
-            return {item.default_value};
-        {{ -endif }}
-    }
-    {{ endfor }}
-};
-}
diff --git a/tools/aconfig/templates/cpp_source_file.template b/tools/aconfig/templates/cpp_source_file.template
index d267f03..289e299 100644
--- a/tools/aconfig/templates/cpp_source_file.template
+++ b/tools/aconfig/templates/cpp_source_file.template
@@ -1,8 +1,98 @@
-
 #include "{header}.h"
-#include "{header}_flag_provider.h"
+{{ if readwrite }}
+#include <server_configurable_flags/get_flags.h>
+{{ endif }}
 
 namespace {cpp_namespace} \{
+
+{{ if for_test }}
+    class flag_provider : public flag_provider_interface \{
+    private:
+        std::unordered_map<std::string, bool> overrides_;
+
+    public:
+        flag_provider()
+            : overrides_()
+        \{}
+
+        {{ for item in class_elements}}
+        virtual bool {item.flag_name}() override \{
+            auto it = overrides_.find("{item.flag_name}");
+              if (it != overrides_.end()) \{
+                  return it->second;
+            } else \{
+              {{ if item.readwrite- }}
+              return server_configurable_flags::GetServerConfigurableFlag(
+                  "{item.device_config_namespace}",
+                  "{item.device_config_flag}",
+                  "{item.default_value}") == "true";
+              {{ -else- }}
+                  return {item.default_value};
+              {{ -endif }}
+            }
+        }
+
+        virtual void {item.flag_name}(bool val) override \{
+            overrides_["{item.flag_name}"] = val;
+        }
+        {{ endfor }}
+
+        virtual void reset_flags() override \{
+            overrides_.clear();
+        }
+    };
+
+{{ -else- }}
+
+    class flag_provider : public flag_provider_interface \{
+    public:
+        {{ for item in class_elements}}
+        virtual bool {item.flag_name}() override \{
+            {{ if item.readwrite- }}
+            return server_configurable_flags::GetServerConfigurableFlag(
+                "{item.device_config_namespace}",
+                "{item.device_config_flag}",
+                "{item.default_value}") == "true";
+            {{ -else- }}
+                return {item.default_value};
+            {{ -endif }}
+        }
+        {{ endfor }}
+    };
+
+
+{{ -endif }}
+
+
 std::unique_ptr<flag_provider_interface> provider_ =
     std::make_unique<flag_provider>();
+
 }
+
+
+{{ for item in class_elements}}
+bool {header}_{item.flag_name}() \{
+    {{ if for_test }}
+    return {cpp_namespace}::{item.flag_name}();
+    {{ -else- }}
+    {{ if not item.readwrite- }}
+    return {item.default_value};
+    {{ -else- }}
+    return {cpp_namespace}::{item.flag_name}();
+    {{ -endif }}
+    {{ -endif }}
+}
+
+{{ if for_test }}
+void set_{header}_{item.flag_name}(bool val) \{
+    {cpp_namespace}::{item.flag_name}(val);
+}
+{{ -endif }}
+{{ endfor -}}
+
+{{ if for_test }}
+void {header}_reset_flags() \{
+     {cpp_namespace}::reset_flags();
+}
+{{ -endif }}
+
diff --git a/tools/aconfig/templates/cpp_test_flag_provider.template b/tools/aconfig/templates/cpp_test_flag_provider.template
deleted file mode 100644
index 03f10a5..0000000
--- a/tools/aconfig/templates/cpp_test_flag_provider.template
+++ /dev/null
@@ -1,48 +0,0 @@
-#pragma once
-
-#include "{header}.h"
-
-{{ if readwrite }}
-#include <server_configurable_flags/get_flags.h>
-{{ endif }}
-
-#include <unordered_map>
-#include <string>
-
-namespace {cpp_namespace} \{
-class flag_provider : public flag_provider_interface \{
-private:
-    std::unordered_map<std::string, bool> overrides_;
-
-public:
-    flag_provider()
-        : overrides_()
-    \{}
-
-    {{ for item in class_elements}}
-    virtual bool {item.flag_name}() override \{
-        auto it = overrides_.find("{item.flag_name}");
-	      if (it != overrides_.end()) \{
-	          return it->second;
-        } else \{
-          {{ if item.readwrite- }}
-          return server_configurable_flags::GetServerConfigurableFlag(
-              "{item.device_config_namespace}",
-              "{item.device_config_flag}",
-              "{item.default_value}") == "true";
-          {{ -else- }}
-              return {item.default_value};
-          {{ -endif }}
-        }
-    }
-
-    virtual void {item.flag_name}(bool val) override \{
-        overrides_["{item.flag_name}"] = val;
-    }
-    {{ endfor }}
-
-    virtual void reset_flags() override \{
-        overrides_.clear();
-    }
-};
-}