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authorEric <[email protected]>2013-05-09 17:04:18 -0700
committerEric <[email protected]>2013-05-09 17:04:18 -0700
commitefbdfbe117939cd50d0252a210b9b7634de42bb4 (patch)
tree74b0bad39d3a5b25bd4199728c16c0b1a4ade703 /src/rcl_dscv_util.erl
parent0d5a803a28010cc956948b614408b9d38997e9a1 (diff)
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Basic file rename from rcl to rlx
Diffstat (limited to 'src/rcl_dscv_util.erl')
-rw-r--r--src/rcl_dscv_util.erl142
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diff --git a/src/rcl_dscv_util.erl b/src/rcl_dscv_util.erl
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-%% -*- 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_dscv_util).
-
--export([do/2,
- format_error/1]).
-
--include_lib("relcool/include/relcool.hrl").
-
-%%============================================================================
-%% Types
-%%============================================================================
-
--type process_fun(Result) :: fun((filename:name(), file | directory) ->
- {ok, Result} |
- {error, term()} |
- {ok, Result, Recurse::boolean()} |
- {noresult, Recurse::boolean()} |
- {error, term()}).
-
-%%============================================================================
-%% API
-%%============================================================================
-
-%% @doc recursively dig down into the library directories specified in the state
-%% looking for OTP Applications
--spec do(process_fun([term()] | term()), [filename:name()]) ->
- [term() | {error, term()}].
-do(ProcessDir, LibDirs) ->
- lists:flatten(ec_plists:map(fun(LibDir) ->
- discover_dir(ProcessDir, LibDir,
- ec_file:type(LibDir))
- end, LibDirs)).
-
--spec format_error([ErrorDetail::term()]) -> iolist().
-format_error(ErrorDetails)
- when erlang:is_list(ErrorDetails) ->
- [[format_detail(ErrorDetail), "\n"] || ErrorDetail <- ErrorDetails].
-
-%%%===================================================================
-%%% Internal Functions
-%%%===================================================================
--spec format_detail(ErrorDetail::term()) -> iolist().
-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({not_a_directory, EbinDir}) ->
- io_lib:format("~s is not a directory when it should be a directory", [EbinDir]).
-
--spec discover_dir(process_fun([term()] | term()),
- file:name(),
- directory | file | symlink) ->
- [{ok, term()}
- | {error, Reason::term()}]
- | []
- | {ok, term()}
- | {error, Reason::term()}.
-discover_dir(ProcessDir, File, directory) ->
- case ProcessDir(File, directory) of
- {ok, Result, true} ->
- [{ok, Result} | recurse(ProcessDir, File)];
- {noresult, true} ->
- recurse(ProcessDir, File);
- {ok, Result, _} ->
- [{ok, Result}];
- {noresult, _} ->
- [];
- Err = {error, _} ->
- [Err]
- end;
-discover_dir(ProcessDir, File, file) ->
- case ProcessDir(File, file) of
- {ok, Result} ->
- [{ok, Result}];
- {noresult, _} ->
- [];
- Err = {error, _} ->
- [Err]
- end;
-discover_dir(ProcessDir, File, symlink) ->
- case filelib:is_dir(File) of
- false ->
- discover_dir(ProcessDir, File, file);
- true ->
- discover_real_symlink_dir(ProcessDir, File)
- end.
-
-discover_real_symlink_dir(ProcessDir, File) ->
- {ok, CurCwd} = file:get_cwd(),
- ok = file:set_cwd(File),
- {ok, ActualRealDir} = file:get_cwd(),
- ok = file:set_cwd(CurCwd),
- lists:prefix(iolist_to_list(filename:absname(ActualRealDir)),
- iolist_to_list(filename:absname(File))),
- case ProcessDir(File, directory) of
- {ok, Result, true} ->
- [{ok, Result} | recurse(ProcessDir, File)];
- {noresult, true} ->
- recurse(ProcessDir, File);
- {ok, Result, _} ->
- [{ok, Result}];
- {noresult, _} ->
- [];
- Err = {error, _} ->
- [Err]
- end.
-
-recurse(ProcessDir, File) ->
- case file:list_dir(File) of
- {error, Reason} ->
- {error, {accessing, File, Reason}};
- {ok, List} ->
- ec_plists:map(fun(LibDir) ->
- discover_dir(ProcessDir, LibDir, ec_file:type(LibDir))
- end, [filename:join([File, Dir]) || Dir <- List])
- end.
-
-iolist_to_list(IoList) ->
- erlang:binary_to_list(erlang:iolist_to_binary(IoList)).