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Merge pull request #138 from evax/conditionalTemplateInstructions

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Support conditional template instructions
This commit is contained in:
Dave Smith 2013-09-20 07:02:51 -07:00
commit d5ca068983
1 changed files with 21 additions and 0 deletions
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21
src/rebar_templater.erl
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@ -347,6 +347,10 @@ write_file(Output, Data, Force) ->
{error, exists}
end.
prepend_instructions(Instructions, Rest) when is_list(Instructions) ->
Instructions ++ Rest;
prepend_instructions(Instruction, Rest) ->
[Instruction|Rest].
%%
%% Execute each instruction in a template definition file.
@ -364,6 +368,23 @@ execute_template(_Files, [], _TemplateType, _TemplateName,
?ERROR("One or more files already exist on disk and "
"were not generated:~n~s~s", [Msg , Help])
end;
execute_template(Files, [{'if', Cond, True} | Rest], TemplateType,
TemplateName, Context, Force, ExistingFiles) ->
execute_template(Files, [{'if', Cond, True, []}|Rest], TemplateType,
TemplateName, Context, Force, ExistingFiles);
execute_template(Files, [{'if', Cond, True, False} | Rest], TemplateType,
TemplateName, Context, Force, ExistingFiles) ->
Instructions = case dict:find(Cond, Context) of
{ok, true} ->
True;
{ok, "true"} ->
True;
_ ->
False
end,
execute_template(Files, prepend_instructions(Instructions, Rest),
TemplateType, TemplateName, Context, Force,
ExistingFiles);
execute_template(Files, [{template, Input, Output} | Rest], TemplateType,
TemplateName, Context, Force, ExistingFiles) ->
InputName = filename:join(filename:dirname(TemplateName), Input),