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provide separate 'file' and 'template' directives, instead of one 'file' directive with a boolean Render flag

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This commit is contained in:
Bryan Fink 2010-02-13 14:14:29 -05:00
parent 60629e8516
commit f6feac493d
3 changed files with 52 additions and 35 deletions
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6
priv/templates/simpleapp.template
View file

@ -1,4 +1,4 @@
{variables, [{appid, "myapp"}]}.
{file, "simpleapp.app", "ebin/{{appid}}.app"}.
{file, "simpleapp_app.erl", "src/{{appid}}_app.erl"}.
{file, "simpleapp_sup.erl", "src/{{appid}}_sup.erl"}.
{template, "simpleapp.app", "ebin/{{appid}}.app"}.
{template, "simpleapp_app.erl", "src/{{appid}}_app.erl"}.
{template, "simpleapp_sup.erl", "src/{{appid}}_sup.erl"}.

4
priv/templates/simplenode.template
View file

@ -1,7 +1,7 @@
{variables, [{nodeid, "mynode"}]}.
{file, "simplenode.reltool.config", "reltool.config"}.
{template, "simplenode.reltool.config", "reltool.config"}.
{file, "simplenode.erl.script", "overlay/erts-vsn/bin/erl"}.
{file, "simplenode.nodetool", "overlay/erts-vsn/bin/nodetool"}.
{file, "simplenode.runner", "overlay/bin/{{nodeid}}"}.
{file, "simplenode.app.config", "overlay/etc/app.config"}.
{file, "simplenode.vm.args", "overlay/etc/vm.args"}.
{template, "simplenode.vm.args", "overlay/etc/vm.args"}.

77
src/rebar_templater.erl
View file

@ -207,6 +207,34 @@ render(Bin, Context) ->
Str = re:replace(Bin, "\"", "\\\\\"", [global, {return,list}]),
mustache:render(Str, Context).
write_file(Output, Data, Force) ->
%% determine if the target file already exists
FileExists = filelib:is_file(Output),
%% perform the function if we're allowed,
%% otherwise just process the next template
if
Force =:= "1"; FileExists =:= false ->
filelib:ensure_dir(Output),
if
{Force, FileExists} =:= {"1", true} ->
?CONSOLE("Writing ~s (forcibly overwriting)~n",
[Output]);
true ->
?CONSOLE("Writing ~s~n", [Output])
end,
case file:write_file(Output, Data) of
ok ->
ok;
{error, Reason} ->
?ABORT("Failed to write output file ~p: ~p\n",
[Output, Reason])
end;
true ->
{error, exists}
end.
%%
%% Execute each instruction in a template definition file.
%%
@ -219,32 +247,25 @@ execute_template([], _TemplateType, _TemplateName, _Context, _Force, ExistingFil
Help = "To force overwriting, specify force=1 on the command line.\n",
?ERROR("One or more files already exist on disk and were not generated:~n~s~s", [Msg , Help])
end;
execute_template([{file, Input, Output, Render} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
% determine if the target file already exists
FileExists = filelib:is_file(Output),
% perform the function if we're allowed, otherwise just process the next template
if
Force =:= "1"; FileExists =:= false ->
InputName = filename:join(filename:dirname(TemplateName), Input),
filelib:ensure_dir(Output),
if
{Force, FileExists} =:= {"1", true} ->
?CONSOLE("Writing ~s (forcibly overwriting)~n", [Output]);
true ->
?CONSOLE("Writing ~s~n", [Output])
end,
Rendered = if Render -> render(load_file(TemplateType, InputName), Context);
true -> load_file(TemplateType, InputName)
end,
case file:write_file(Output, Rendered) of
ok ->
execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles);
{error, Reason} ->
?ABORT("Failed to write output file ~p: ~p\n", [Output, Reason])
end;
true ->
execute_template(Rest, TemplateType, TemplateName, Context, Force, [Output|ExistingFiles])
execute_template([{template, Input, Output} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
InputName = filename:join(filename:dirname(TemplateName), Input),
case write_file(Output, render(load_file(TemplateType, InputName), Context), Force) of
ok ->
execute_template(Rest, TemplateType, TemplateName, Context,
Force, ExistingFiles);
{error, exists} ->
execute_template(Rest, TemplateType, TemplateName, Context,
Force, [Output|ExistingFiles])
end;
execute_template([{file, Input, Output} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
InputName = filename:join(filename:dirname(TemplateName), Input),
case write_file(Output, load_file(TemplateType, InputName), Force) of
ok ->
execute_template(Rest, TemplateType, TemplateName, Context,
Force, ExistingFiles);
{error, exists} ->
execute_template(Rest, TemplateType, TemplateName, Context,
Force, [Output|ExistingFiles])
end;
execute_template([{dir, Name} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
case filelib:ensure_dir(filename:join(Name, "dummy")) of
@ -264,10 +285,6 @@ execute_template([{chmod, Mod, File} | Rest], TemplateType, TemplateName, Contex
end;
execute_template([{variables, _} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles);
execute_template([{file, Input, Output} | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
%% old short-form of {file,_,_} is same as
%% new long-form of {file,_,_,true}
execute_template([{file, Input, Output, true}|Rest], TemplateType, TemplateName, Context, Force, ExistingFiles);
execute_template([Other | Rest], TemplateType, TemplateName, Context, Force, ExistingFiles) ->
?WARN("Skipping unknown template instruction: ~p\n", [Other]),
execute_template(Rest, TemplateType, TemplateName, Context, Force, ExistingFiles).