Add nix-flake-c, nix_flake_init_global, nix_flake_settings_new

src/external-api-docs/doxygen.cfg.in

@@ -40,6 +40,7 @@ GENERATE_LATEX         = NO
 INPUT                  = \
   @src@/src/libutil-c \
   @src@/src/libexpr-c \
+  @src@/src/libflake-c \
   @src@/src/libstore-c \
   @src@/src/external-api-docs/README.md
 

src/external-api-docs/package.nix

@@ -30,6 +30,7 @@ mkMesonDerivation (finalAttrs: {
       # Source is not compiled, but still must be available for Doxygen
       # to gather comments.
       (cpp ../libexpr-c)
+      (cpp ../libflake-c)
       (cpp ../libstore-c)
       (cpp ../libutil-c)
     ];