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Implement merged overlays

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This allows overlay_vars to merge comma delimited var config files
This commit is contained in:
Pedram Nimreezi 2013-02-04 15:20:30 -05:00
parent 720d71e47d
commit df7cfba71f
1 changed files with 18 additions and 8 deletions
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26
src/rebar_reltool.erl
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@ -166,22 +166,32 @@ process_overlay(Config, ReltoolConfig) ->
%% providing an additional file on the command-line.
%%
overlay_vars(Config, Vars0, ReltoolConfig) ->
BaseVars = load_vars_file(proplists:get_value(overlay_vars, ReltoolConfig)),
OverrideVars = load_vars_file(rebar_config:get_global(Config,
overlay_vars,
undefined)),
M = fun(_Key, _Base, Override) -> Override end,
BaseVars = load_vars_file([proplists:get_value(overlay_vars, ReltoolConfig)]),
OverlayVars = rebar_config:get_global(Config, overlay_vars, []),
OverrideVars = load_vars_file(string:tokens(OverlayVars, ",")),
M = fun merge_overlay_var/3,
dict:merge(M, dict:merge(M, Vars0, BaseVars), OverrideVars).
merge_overlay_var(_Key, _Base, Override) -> Override.
%%
%% If a filename is provided, construct a dict of terms
%%
load_vars_file(undefined) ->
load_vars_file([undefined]) ->
dict:new();
load_vars_file(File) ->
load_vars_file([]) ->
dict:new();
load_vars_file(Files) ->
load_vars_file(Files, dict:new()).
load_vars_file([], Dict) ->
Dict;
load_vars_file([File | Files], BaseVars) ->
case rebar_config:consult_file(File) of
{ok, Terms} ->
dict:from_list(Terms);
OverrideVars = dict:from_list(Terms),
M = fun merge_overlay_var/3,
load_vars_file(Files, dict:merge(M, BaseVars, OverrideVars));
{error, Reason} ->
?ABORT("Unable to load overlay_vars from ~p: ~p\n", [File, Reason])
end.