您最多选择25个主题
主题必须以字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
178 行
8.1 KiB
178 行
8.1 KiB
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
|
|
%% ex: ts=4 sw=4 et
|
|
%% -------------------------------------------------------------------
|
|
%%
|
|
%% rebar: Erlang Build Tools
|
|
%%
|
|
%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.com)
|
|
%%
|
|
%% Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
%% of this software and associated documentation files (the "Software"), to deal
|
|
%% in the Software without restriction, including without limitation the rights
|
|
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
%% copies of the Software, and to permit persons to whom the Software is
|
|
%% furnished to do so, subject to the following conditions:
|
|
%%
|
|
%% The above copyright notice and this permission notice shall be included in
|
|
%% all copies or substantial portions of the Software.
|
|
%%
|
|
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
%% THE SOFTWARE.
|
|
%% -------------------------------------------------------------------
|
|
%% @doc Module providing core functionality about command dispatch, namespacing,
|
|
%% and chaining for rebar3.
|
|
-module(rebar_core).
|
|
|
|
-export([init_command/2, process_namespace/2, process_command/2, do/2, format_error/1]).
|
|
|
|
-include("rebar.hrl").
|
|
-include_lib("providers/include/providers.hrl").
|
|
|
|
%% @doc initial command set up; based on the first fragment of the
|
|
%% command, dispatch to special environments. The keywords for
|
|
%% `do' and `as' are implicitly reserved here, barring them from
|
|
%% being used as other commands or namespaces.
|
|
-spec init_command(rebar_state:t(), atom()) ->
|
|
{ok, rebar_state:t()} | {error, term()}.
|
|
init_command(State, do) ->
|
|
process_command(rebar_state:namespace(State, default), do);
|
|
init_command(State, as) ->
|
|
process_command(rebar_state:namespace(State, default), as);
|
|
init_command(State, Command) ->
|
|
case process_namespace(State, Command) of
|
|
{ok, State1, Command1} ->
|
|
process_command(State1, Command1);
|
|
{error, Reason} ->
|
|
{error, Reason}
|
|
end.
|
|
|
|
%% @doc parse the commands starting at the namespace level;
|
|
%% a namespace is found if the first keyword to match is not
|
|
%% belonging to an existing provider, and iff the keyword also
|
|
%% matches a registered namespace.
|
|
%% The command to run is returned last; for namespaces, some
|
|
%% magic is done implicitly calling `do' as an indirect dispatcher.
|
|
-spec process_namespace(rebar_state:t(), atom()) ->
|
|
{error, term()} | {ok, rebar_state:t(), atom()}.
|
|
process_namespace(_State, as) ->
|
|
{error, "Namespace 'as' is forbidden"};
|
|
process_namespace(State, Command) ->
|
|
Providers = rebar_state:providers(State),
|
|
CommandProvider = providers:get_provider(Command, Providers, default),
|
|
case CommandProvider of
|
|
not_found ->
|
|
case providers:get_providers_by_namespace(Command, Providers) of
|
|
[] ->
|
|
{error, io_lib:format("Command ~p not found", [Command])};
|
|
_ ->
|
|
%% Replay 'do' as a command of that namespace
|
|
{ok, rebar_state:namespace(State, Command), do}
|
|
end;
|
|
_ ->
|
|
{ok, rebar_state:namespace(State, default), Command}
|
|
end.
|
|
|
|
%% @doc Dispatches a given command based on the current state.
|
|
%% This requires mapping a command name to a specific provider.
|
|
%% `as' and `do' are still treated as special providers here.
|
|
%% Basic profile application may also be run.
|
|
%%
|
|
%% The function also takes care of expanding a provider to its
|
|
%% dependencies in the proper order.
|
|
-spec process_command(rebar_state:t(), atom()) ->
|
|
{ok, rebar_state:t()} | {error, string()} | {error, {module(), any()}}.
|
|
process_command(State, Command) ->
|
|
%% ? rebar_prv_install_deps:setup_env(State),
|
|
Providers = rebar_state:providers(State),
|
|
Namespace = rebar_state:namespace(State),
|
|
TargetProviders = providers:get_target_providers(Command, Providers, Namespace),
|
|
CommandProvider = providers:get_provider(Command, Providers, Namespace),
|
|
?DEBUG("Expanded command sequence to be run: ~p", [TargetProviders]),
|
|
case CommandProvider of
|
|
not_found when Command =/= do ->
|
|
case Namespace of
|
|
default ->
|
|
{error, io_lib:format("Command ~p not found", [Command])};
|
|
_ ->
|
|
{error, io_lib:format("Command ~p not found in namespace ~p",
|
|
[Command, Namespace])}
|
|
end;
|
|
not_found when Command =:= do, Namespace =/= default ->
|
|
do([{default, do} | TargetProviders], State);
|
|
CommandProvider ->
|
|
case Command of
|
|
do ->
|
|
do(TargetProviders, State);
|
|
as ->
|
|
do(TargetProviders, State);
|
|
_ ->
|
|
Profiles = providers:profiles(CommandProvider),
|
|
State1 = rebar_state:apply_profiles(State, Profiles),
|
|
Opts = providers:opts(CommandProvider)++rebar3:global_option_spec_list(),
|
|
case getopt:parse(Opts, rebar_state:command_args(State1)) of
|
|
{ok, Args} ->
|
|
State2 = rebar_state:command_parsed_args(State1, Args),
|
|
do(TargetProviders, State2);
|
|
{error, {invalid_option, Option}} ->
|
|
{error, io_lib:format("Invalid option ~ts on task ~p", [Option, Command])};
|
|
{error, {invalid_option_arg, {Option, Arg}}} ->
|
|
{error, io_lib:format("Invalid argument ~ts to option ~ts", [Arg, Option])};
|
|
{error, {missing_option_arg, Option}} ->
|
|
{error, io_lib:format("Missing argument to option ~ts", [Option])}
|
|
end
|
|
end
|
|
end.
|
|
|
|
%% @doc execute the selected providers. If a chain of providers
|
|
%% has been returned, run them one after the other, while piping
|
|
%% the state from the first into the next one.
|
|
-spec do([{atom(), atom()}], rebar_state:t()) ->
|
|
{ok, rebar_state:t()} | {error, string()} | {error, {module(), any()}}.
|
|
do([], State) ->
|
|
{ok, State};
|
|
do([ProviderName | Rest], State) ->
|
|
?DEBUG("Provider: ~p", [ProviderName]),
|
|
%% Special providers like 'as', 'do' or some hooks may be passed
|
|
%% as a tuple {Namespace, Name}, otherwise not. Handle them
|
|
%% on a per-need basis.
|
|
Provider = case ProviderName of
|
|
{Namespace, Name} ->
|
|
providers:get_provider(Name
|
|
,rebar_state:providers(State)
|
|
,Namespace);
|
|
_ ->
|
|
providers:get_provider(ProviderName
|
|
,rebar_state:providers(State)
|
|
,rebar_state:namespace(State))
|
|
end,
|
|
|
|
try providers:do(Provider, State) of
|
|
{ok, State1} ->
|
|
do(Rest, State1);
|
|
{error, Error} ->
|
|
{error, Error}
|
|
catch
|
|
?WITH_STACKTRACE(error,undef,Stack)
|
|
case Stack of
|
|
[{ProviderName, do, [_], _}|_] ->
|
|
%% This should really only happen if a plugin provider doesn't export do/1
|
|
?DEBUG("Undefined call to provider's do/1 function:~n~p", [Stack]),
|
|
?PRV_ERROR({bad_provider_namespace, ProviderName});
|
|
_ -> % re-raise
|
|
erlang:raise(error, undef, Stack)
|
|
end;
|
|
error:{badrecord,provider} ->
|
|
{error, ProviderName}
|
|
end.
|
|
|
|
%% @doc convert a given exception's payload into an io description.
|
|
-spec format_error(any()) -> iolist().
|
|
format_error({bad_provider_namespace, {Namespace, Name}}) ->
|
|
io_lib:format("Undefined command ~ts in namespace ~ts", [Name, Namespace]);
|
|
format_error({bad_provider_namespace, Name}) ->
|
|
io_lib:format("Undefined command ~ts", [Name]).
|