diff options
| -rw-r--r-- | src/rcl_app_discovery.erl | 223 | ||||
| -rw-r--r-- | src/rcl_prv_discover.erl | 189 |
2 files changed, 234 insertions, 178 deletions
diff --git a/src/rcl_app_discovery.erl b/src/rcl_app_discovery.erl new file mode 100644 index 0000000..20df1cf --- /dev/null +++ b/src/rcl_app_discovery.erl @@ -0,0 +1,223 @@ +%% -*- erlang-indent-level: 4; indent-tabs-mode: nil; fill-column: 80 -*- +%%% Copyright 2012 Erlware, LLC. All Rights Reserved. +%%% +%%% This file is provided to you under the Apache License, +%%% Version 2.0 (the "License"); you may not use this file +%%% except in compliance with the License. You may obtain +%%% a copy of the License at +%%% +%%% http://www.apache.org/licenses/LICENSE-2.0 +%%% +%%% Unless required by applicable law or agreed to in writing, +%%% software distributed under the License is distributed on an +%%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +%%% KIND, either express or implied. See the License for the +%%% specific language governing permissions and limitations +%%% under the License. +%%%--------------------------------------------------------------------------- +%%% @author Eric Merritt <[email protected]> +%%% @copyright (C) 2012 Erlware, LLC. +%%% +%%% @doc This provider uses the lib_dir setting of the state. It searches the +%%% Lib Dirs looking for all OTP Applications that are available. When it finds +%%% those OTP Applications it loads the information about them and adds them to +%%% the state of available apps. This implements the rcl_provider behaviour. +-module(rcl_app_discovery). + +-export([do/2, + format_error/1]). + +-include_lib("relcool/include/relcool.hrl"). + +%%============================================================================ +%% API +%%============================================================================ + +%% @doc recursively dig down into the library directories specified in the state +%% looking for OTP Applications +-spec do(rcl_state:t(), [filename:name()]) -> {ok, [rcl_app_info:t()]} | relcool:error(). +do(State, LibDirs) -> + rcl_log:info(rcl_state:log(State), + fun() -> + ["Resolving OTP Applications from directories:\n", + [[rcl_util:indent(1), LibDir, "\n"] || LibDir <- LibDirs]] + end), + resolve_app_metadata(State, LibDirs). + +-spec format_error([ErrorDetail::term()]) -> iolist(). +format_error(ErrorDetails) + when erlang:is_list(ErrorDetails) -> + [[format_detail(ErrorDetail), "\n"] || ErrorDetail <- ErrorDetails]. + +%%%=================================================================== +%%% Internal Functions +%%%=================================================================== +resolve_app_metadata(State, LibDirs) -> + AppMeta0 = lists:flatten(ec_plists:map(fun(LibDir) -> + discover_dir([], LibDir) + end, LibDirs)), + AppMeta1 = setup_overrides(State, AppMeta0), + + Errors = [case El of + {error, Ret} -> Ret; + _ -> El + end + || El <- AppMeta1, + case El of + {error, _} -> + true; + _ -> + false + end], + + case Errors of + [] -> + AppMeta2 = lists:flatten(AppMeta1), + rcl_log:debug(rcl_state:log(State), + fun() -> + ["Resolved the following OTP Applications from the system: \n", + [[rcl_app_info:format(1, App), "\n"] || App <- AppMeta2]] + end), + {ok, AppMeta2}; + _ -> + ?RCL_ERROR(Errors) + end. + +app_name({error, _}) -> + undefined; +app_name(AppMeta) -> + rcl_app_info:name(AppMeta). + +setup_overrides(State, AppMetas0) -> + Overrides = rcl_state:overrides(State), + AppMetas1 = [AppMeta || AppMeta <- AppMetas0, + not lists:keymember(app_name(AppMeta), 1, Overrides)], + [case is_valid_otp_app(filename:join([FileName, "ebin", + erlang:atom_to_list(AppName) ++ ".app"])) of + [] -> + {error, {invalid_override, AppName, FileName}}; + Error = {error, _} -> + Error; + App -> + rcl_app_info:link(App, true) + end || {AppName, FileName} <- Overrides] ++ AppMetas1. + + + +-spec format_detail(ErrorDetail::term()) -> iolist(). +format_detail({error, {invalid_override, AppName, FileName}}) -> + io_lib:format("Override {~p, ~p} is not a valid OTP App. Perhaps you forgot to build it?", + [AppName, FileName]); +format_detail({accessing, File, eaccess}) -> + io_lib:format("permission denied accessing file ~s", [File]); +format_detail({accessing, File, Type}) -> + io_lib:format("error (~p) accessing file ~s", [Type, File]); +format_detail({no_beam_files, EbinDir}) -> + io_lib:format("no beam files found in directory ~s", [EbinDir]); +format_detail({not_a_directory, EbinDir}) -> + io_lib:format("~s is not a directory when it should be a directory", [EbinDir]); +format_detail({unable_to_load_app, AppDir, _}) -> + io_lib:format("Unable to load the application metadata from ~s", [AppDir]); +format_detail({invalid_app_file, File}) -> + io_lib:format("Application metadata file exists but is malformed: ~s", + [File]); +format_detail({unversioned_app, AppDir, _AppName}) -> + io_lib:format("Application metadata exists but version is not available: ~s", + [AppDir]); +format_detail({app_info_error, {Module, Detail}}) -> + Module:format_error(Detail). + +-spec discover_dir([file:name()], + file:name()) -> + [rcl_app_info:t() | {error, Reason::term()}] | + rcl_app_info:t() | {error, Reason::term()}. +discover_dir(IgnoreDirs, File) -> + case (not lists:member(File, IgnoreDirs)) + andalso filelib:is_dir(File) of + true -> + case file:list_dir(File) of + {error, Reason} -> + {error, {accessing, File, Reason}}; + {ok, List} -> + ec_plists:map(fun(LibDir) -> + discover_dir(IgnoreDirs, LibDir) + end, [filename:join([File, Dir]) || Dir <- List]) + end; + false -> + is_valid_otp_app(File) + end. + +-spec is_valid_otp_app(file:name()) -> rcl_app_info:t() | {error, Reason::term()} | []. +is_valid_otp_app(File) -> + %% Is this an ebin dir? + EbinDir = filename:dirname(File), + case filename:basename(EbinDir) of + "ebin" -> + case lists:suffix(".app", File) of + true -> + has_at_least_one_beam(EbinDir, File); + false -> + [] + end; + _ -> + [] + end. + +-spec has_at_least_one_beam(file:name(), file:filename()) -> + rcl_app_info:t() | {error, Reason::term()}. +has_at_least_one_beam(EbinDir, File) -> + case file:list_dir(EbinDir) of + {ok, List} -> + case lists:any(fun(NFile) -> lists:suffix(".beam", NFile) end, List) of + true -> + gather_application_info(EbinDir, File); + false -> + {error, {no_beam_files, EbinDir}} + end; + _ -> + {error, {not_a_directory, EbinDir}} + end. + +-spec gather_application_info(file:name(), file:filename()) -> + rcl_app_info:t() | {error, Reason::term()}. +gather_application_info(EbinDir, File) -> + AppDir = filename:dirname(EbinDir), + case file:consult(File) of + {ok, [{application, AppName, AppDetail}]} -> + get_vsn(AppDir, AppName, AppDetail); + {error, Reason} -> + {error, {unable_to_load_app, AppDir, Reason}}; + _ -> + {error, {invalid_app_file, File}} + end. + +-spec get_vsn(file:name(), atom(), proplists:proplist()) -> + rcl_app_info:t() | {error, Reason::term()}. +get_vsn(AppDir, AppName, AppDetail) -> + case proplists:get_value(vsn, AppDetail) of + undefined -> + {error, {unversioned_app, AppDir, AppName}}; + AppVsn -> + case get_deps(AppDir, AppName, AppVsn, AppDetail) of + {ok, App} -> + App; + {error, Detail} -> + {error, {app_info_error, Detail}} + end + end. + +-spec get_deps(file:name(), atom(), string(), proplists:proplist()) -> + {ok, rcl_app_info:t()} | {error, Reason::term()}. +get_deps(AppDir, AppName, AppVsn, AppDetail) -> + ActiveApps = proplists:get_value(applications, AppDetail, []), + LibraryApps = proplists:get_value(included_applications, AppDetail, []), + rcl_app_info:new(AppName, AppVsn, AppDir, ActiveApps, LibraryApps). + +%%%=================================================================== +%%% Test Functions +%%%=================================================================== + +-ifndef(NOTEST). +-include_lib("eunit/include/eunit.hrl"). + +-endif. diff --git a/src/rcl_prv_discover.erl b/src/rcl_prv_discover.erl index 862bd6e..1ffbece 100644 --- a/src/rcl_prv_discover.erl +++ b/src/rcl_prv_discover.erl @@ -43,71 +43,22 @@ init(State) -> -spec do(rcl_state:t()) -> {ok, rcl_state:t()} | relcool:error(). do(State) -> LibDirs = get_lib_dirs(State), - rcl_log:info(rcl_state:log(State), - fun() -> - ["Resolving OTP Applications from directories:\n", - [[rcl_util:indent(1), LibDir, "\n"] || LibDir <- LibDirs]] - end), - resolve_app_metadata(State, LibDirs). + case rcl_app_discovery:do(State, LibDirs) of + {ok, AppMeta} -> + {ok, rcl_state:available_apps(State, AppMeta)}; + Error -> + Error + end. --spec format_error([ErrorDetail::term()]) -> iolist(). -format_error(ErrorDetails) - when erlang:is_list(ErrorDetails) -> - [[format_detail(ErrorDetail), "\n"] || ErrorDetail <- ErrorDetails]. +%% @doc this is here to comply with the signature. However, we do not actually +%% produce any errors and so simply return an empty string. +-spec format_error(any()) -> iolist(). +format_error(_) -> + "". %%%=================================================================== %%% Internal Functions %%%=================================================================== -resolve_app_metadata(State, LibDirs) -> - AppMeta0 = lists:flatten(ec_plists:map(fun(LibDir) -> - discover_dir([], LibDir) - end, LibDirs)), - AppMeta1 = setup_overrides(State, AppMeta0), - - Errors = [case El of - {error, Ret} -> Ret; - _ -> El - end - || El <- AppMeta1, - case El of - {error, _} -> - true; - _ -> - false - end], - - case Errors of - [] -> - AppMeta2 = lists:flatten(AppMeta1), - rcl_log:debug(rcl_state:log(State), - fun() -> - ["Resolved the following OTP Applications from the system: \n", - [[rcl_app_info:format(1, App), "\n"] || App <- AppMeta2]] - end), - {ok, rcl_state:available_apps(State, AppMeta2)}; - _ -> - ?RCL_ERROR(Errors) - end. - -app_name({error, _}) -> - undefined; -app_name(AppMeta) -> - rcl_app_info:name(AppMeta). - -setup_overrides(State, AppMetas0) -> - Overrides = rcl_state:overrides(State), - AppMetas1 = [AppMeta || AppMeta <- AppMetas0, - not lists:keymember(app_name(AppMeta), 1, Overrides)], - [case is_valid_otp_app(filename:join([FileName, "ebin", - erlang:atom_to_list(AppName) ++ ".app"])) of - [] -> - {error, {invalid_override, AppName, FileName}}; - Error = {error, _} -> - Error; - App -> - rcl_app_info:link(App, true) - end || {AppName, FileName} <- Overrides] ++ AppMetas1. - get_lib_dirs(State) -> LibDirs0 = rcl_state:lib_dirs(State), case rcl_state:get(State, disable_default_libs, false) of @@ -140,121 +91,3 @@ add_system_lib_dir(State, LibDirs) -> LibDirs end end. - --spec format_detail(ErrorDetail::term()) -> iolist(). -format_detail({error, {invalid_override, AppName, FileName}}) -> - io_lib:format("Override {~p, ~p} is not a valid OTP App. Perhaps you forgot to build it?", - [AppName, FileName]); -format_detail({accessing, File, eaccess}) -> - io_lib:format("permission denied accessing file ~s", [File]); -format_detail({accessing, File, Type}) -> - io_lib:format("error (~p) accessing file ~s", [Type, File]); -format_detail({no_beam_files, EbinDir}) -> - io_lib:format("no beam files found in directory ~s", [EbinDir]); -format_detail({not_a_directory, EbinDir}) -> - io_lib:format("~s is not a directory when it should be a directory", [EbinDir]); -format_detail({unable_to_load_app, AppDir, _}) -> - io_lib:format("Unable to load the application metadata from ~s", [AppDir]); -format_detail({invalid_app_file, File}) -> - io_lib:format("Application metadata file exists but is malformed: ~s", - [File]); -format_detail({unversioned_app, AppDir, _AppName}) -> - io_lib:format("Application metadata exists but version is not available: ~s", - [AppDir]); -format_detail({app_info_error, {Module, Detail}}) -> - Module:format_error(Detail). - --spec discover_dir([file:name()], - file:name()) -> - [rcl_app_info:t() | {error, Reason::term()}] | - rcl_app_info:t() | {error, Reason::term()}. -discover_dir(IgnoreDirs, File) -> - case (not lists:member(File, IgnoreDirs)) - andalso filelib:is_dir(File) of - true -> - case file:list_dir(File) of - {error, Reason} -> - {error, {accessing, File, Reason}}; - {ok, List} -> - ec_plists:map(fun(LibDir) -> - discover_dir(IgnoreDirs, LibDir) - end, [filename:join([File, Dir]) || Dir <- List]) - end; - false -> - is_valid_otp_app(File) - end. - --spec is_valid_otp_app(file:name()) -> rcl_app_info:t() | {error, Reason::term()} | []. -is_valid_otp_app(File) -> - %% Is this an ebin dir? - EbinDir = filename:dirname(File), - case filename:basename(EbinDir) of - "ebin" -> - case lists:suffix(".app", File) of - true -> - has_at_least_one_beam(EbinDir, File); - false -> - [] - end; - _ -> - [] - end. - --spec has_at_least_one_beam(file:name(), file:filename()) -> - rcl_app_info:t() | {error, Reason::term()}. -has_at_least_one_beam(EbinDir, File) -> - case file:list_dir(EbinDir) of - {ok, List} -> - case lists:any(fun(NFile) -> lists:suffix(".beam", NFile) end, List) of - true -> - gather_application_info(EbinDir, File); - false -> - {error, {no_beam_files, EbinDir}} - end; - _ -> - {error, {not_a_directory, EbinDir}} - end. - --spec gather_application_info(file:name(), file:filename()) -> - rcl_app_info:t() | {error, Reason::term()}. -gather_application_info(EbinDir, File) -> - AppDir = filename:dirname(EbinDir), - case file:consult(File) of - {ok, [{application, AppName, AppDetail}]} -> - get_vsn(AppDir, AppName, AppDetail); - {error, Reason} -> - {error, {unable_to_load_app, AppDir, Reason}}; - _ -> - {error, {invalid_app_file, File}} - end. - --spec get_vsn(file:name(), atom(), proplists:proplist()) -> - rcl_app_info:t() | {error, Reason::term()}. -get_vsn(AppDir, AppName, AppDetail) -> - case proplists:get_value(vsn, AppDetail) of - undefined -> - {error, {unversioned_app, AppDir, AppName}}; - AppVsn -> - case get_deps(AppDir, AppName, AppVsn, AppDetail) of - {ok, App} -> - App; - {error, Detail} -> - {error, {app_info_error, Detail}} - end - end. - --spec get_deps(file:name(), atom(), string(), proplists:proplist()) -> - {ok, rcl_app_info:t()} | {error, Reason::term()}. -get_deps(AppDir, AppName, AppVsn, AppDetail) -> - ActiveApps = proplists:get_value(applications, AppDetail, []), - LibraryApps = proplists:get_value(included_applications, AppDetail, []), - rcl_app_info:new(AppName, AppVsn, AppDir, ActiveApps, LibraryApps). - -%%%=================================================================== -%%% Test Functions -%%%=================================================================== - --ifndef(NOTEST). --include_lib("eunit/include/eunit.hrl"). - --endif. |