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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2011 Dmitry Demeshchuk
%% Copyright (c) 2011 Tuncer Ayaz
%%
%% 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.
%% -------------------------------------------------------------------
-module(rebar_reltool_link).
-export([pre_generate/2, post_generate/2]).
%% ===================================================================
%% Public API
%% ===================================================================
pre_generate(_, _) ->
maybe_symlink_root_dir().
post_generate(_, _) ->
case has_symlink_dir() of
{true, SymlinkDir} ->
ok = rebar_file_utils:rm_rf(SymlinkDir),
ok = file:del_dir(fake_lib_dir());
false ->
ok
end.
%% ===================================================================
%% Internal functions
%% ===================================================================
-define(FMT(Str, Args), lists:flatten(io_lib:format(Str, Args))).
maybe_symlink_root_dir() ->
case rebar_app_utils:is_app_dir("..") of
{true, RootAppFile} ->
RootApp = rebar_app_utils:app_name(RootAppFile),
LibDir = fake_lib_dir(),
SymlinkDir = filename:join([LibDir, RootApp]),
case filelib:is_dir(SymlinkDir) of
false ->
ok = filelib:ensure_dir(filename:join(SymlinkDir, "dummy"));
true ->
ok
end,
Files = [F || F <- filelib:wildcard("../*"), F =/= LibDir],
make_links(SymlinkDir, Files),
ok;
false ->
ok
end.
fake_lib_dir() ->
filename:join("..", "fake_lib_dir").
make_links(SymlinkDir, Files) ->
lists:foreach(
fun(File) ->
Filename = filename:basename(File),
Existing = filename:absname(filename:join([File])),
New = filename:join([SymlinkDir, Filename]),
ok = make_symlink(Existing, New)
end, Files).
make_symlink(Existing, New) ->
case filelib:is_dir(New) of
true ->
ok = file:delete(New);
false ->
ok
end,
file:make_symlink(Existing, New).
has_symlink_dir() ->
case rebar_app_utils:is_app_dir("..") of
{true, RootAppFile} ->
RootApp = rebar_app_utils:app_name(RootAppFile),
LibDir = fake_lib_dir(),
SymlinkDir = filename:join([LibDir, RootApp]),
case filelib:is_dir(SymlinkDir) of
true -> {true, SymlinkDir};
false -> false
end;
false ->
false
end.