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-rw-r--r--src/rlx_prv_overlay.erl9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/rlx_prv_overlay.erl b/src/rlx_prv_overlay.erl
index 75608b3..ec8a97f 100644
--- a/src/rlx_prv_overlay.erl
+++ b/src/rlx_prv_overlay.erl
@@ -152,10 +152,15 @@ get_overlay_vars_from_file(State, OverlayVars) ->
-spec read_overlay_vars(rlx_state:t(), proplists:proplist(), [file:name()]) ->
proplists:proplist() | relx:error().
read_overlay_vars(State, OverlayVars, FileNames) ->
+ ApiCallerVars = rlx_state:api_caller_overlays(State),
Terms = merge_overlay_vars(State, FileNames),
- case render_overlay_vars(OverlayVars, Terms, []) of
+ case render_overlay_vars(OverlayVars ++ ApiCallerVars, Terms, []) of
{ok, NewTerms} ->
- OverlayVars ++ NewTerms;
+ % We place `ApiCallerVars' at the end on purpose; their
+ % definitions should be overwrittenable by both internal
+ % and rendered vars, as not to change behaviour in
+ % setups preceding the support for API caller overlays.
+ OverlayVars ++ NewTerms ++ ApiCallerVars;
Error ->
Error
end.