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Add support for loading template vars from external file

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This commit is contained in:
Dave Smith 2011-03-29 21:38:14 -06:00
parent 3e2baf1a07
commit c4907b6297
1 changed files with 19 additions and 3 deletions
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22
src/rebar_templater.erl
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@ -104,17 +104,33 @@ create(_Config, _) ->
Context0 = dict:new()
end,
%% Load variables from disk file, if provided
Context1 = case rebar_config:get_global(template_vars, undefined) of
undefined ->
Context0;
File ->
case file:consult(File) of
{ok, Terms} ->
%% TODO: Cleanup/merge with similar code in rebar_reltool
M = fun(_Key, _Base, Override) -> Override end,
dict:merge(M, Context0, dict:from_list(Terms));
{error, Reason} ->
?ABORT("Unable to load template_vars from ~s: ~p\n",
[File, Reason])
end
end,
%% For each variable, see if it's defined in global vars -- if it is,
%% prefer that value over the defaults
Context1 = update_vars(dict:fetch_keys(Context0), Context0),
Context2 = update_vars(dict:fetch_keys(Context1), Context1),
?DEBUG("Template ~p context: ~p\n", [TemplateId, dict:to_list(Context1)]),
%% Handle variables that possibly include other variables in their
%% definition
Context = resolve_recursive_vars(dict:to_list(Context1), Context1),
Context = resolve_recursive_vars(dict:to_list(Context2), Context2),
?DEBUG("Resolved Template ~p context: ~p\n",
[TemplateId, dict:to_list(Context1)]),
[TemplateId, dict:to_list(Context)]),
%% Now, use our context to process the template definition -- this
%% permits us to use variables within the definition for filenames.