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Add support for forcibly overwriting output files; courtesy of OJ Reeves
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parent
12420ee43c
commit
47e70f308a
1 changed files with 40 additions and 17 deletions
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@ -95,7 +95,8 @@ create(_Config, _) ->
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?DEBUG("Final template def ~p: ~p\n", [template_id(), FinalTemplate]),
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%% Execute the instructions in the finalized template
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execute_template(FinalTemplate, Type, Template, Context).
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Force = rebar_config:get_global(force, "0"),
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execute_template(FinalTemplate, Type, Template, Context, Force, []).
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@ -208,28 +209,50 @@ render(Bin, Context) ->
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%%
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%% Execute each instruction in a template definition file.
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%%
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execute_template([], _TemplateType, _TemplateName, _Context) ->
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ok;
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execute_template([{file, Input, Output} | Rest], TemplateType, TemplateName, Context) ->
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InputName = filename:join(filename:dirname(TemplateName), Input),
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filelib:ensure_dir(Output),
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case file:write_file(Output, render(load_file(TemplateType, InputName), Context)) of
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ok ->
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execute_template(Rest, TemplateType, TemplateName, Context);
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{error, Reason} ->
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?ABORT("Failed to write output file ~p: ~p\n", [Output, Reason])
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execute_template([], _TemplateType, _TemplateName, _Context, _Force, ExistingFiles) ->
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case length(ExistingFiles) of
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0 ->
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ok;
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_ ->
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Msg = lists:flatten([io_lib:format("\t* ~p~n", [F]) || F <- lists:reverse(ExistingFiles)]),
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Help = "To force overwriting, specify force=1 on the command line.\n",
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?ERROR("One or more files already exist on disk and were not generated:~n~s~s", [Msg , Help])
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end;
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execute_template([{dir, Name} | Rest], TemplateType, TemplateName, Context) ->
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execute_template([{file, Input, Output} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
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% determine if the target file already exists
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FileExists = filelib:is_file(Output),
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% perform the function if we're allowed, otherwise just process the next template
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if
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Force =:= "1"; FileExists =:= false ->
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InputName = filename:join(filename:dirname(TemplateName), Input),
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filelib:ensure_dir(Output),
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if
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{Force, FileExists} =:= {"1", true} ->
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?CONSOLE("Writing ~s (forcibly overwriting)~n", [Output]);
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true ->
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?CONSOLE("Writing ~s~n", [Output])
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end,
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case file:write_file(Output, render(load_file(TemplateType, InputName), Context)) of
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ok ->
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execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles);
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{error, Reason} ->
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?ABORT("Failed to write output file ~p: ~p\n", [Output, Reason])
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end;
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true ->
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execute_template(Rest, TemplateType, TemplateName, Context, Force, [Output|ExistingFiles])
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end;
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execute_template([{dir, Name} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
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case filelib:ensure_dir(filename:join(Name, "dummy")) of
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ok ->
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execute_template(Rest, TemplateType, TemplateName, Context);
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execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles);
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{error, Reason} ->
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?ABORT("Failed while processing template instruction {dir, ~s}: ~p\n",
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[Name, Reason])
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end;
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execute_template([{variables, _} | Rest], TemplateType, TemplateName, Context) ->
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execute_template(Rest, TemplateType, TemplateName, Context);
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execute_template([Other | Rest], TemplateType, TemplateName, Context) ->
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execute_template([{variables, _} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
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execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles);
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execute_template([Other | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
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?WARN("Skipping unknown template instruction: ~p\n", [Other]),
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execute_template(Rest, TemplateType, TemplateName, Context).
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execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles).
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