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Diffstat (limited to 'src/rlx_prv_release.erl')
| -rw-r--r-- | src/rlx_prv_release.erl | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/rlx_prv_release.erl b/src/rlx_prv_release.erl new file mode 100644 index 0000000..d90b492 --- /dev/null +++ b/src/rlx_prv_release.erl @@ -0,0 +1,187 @@ +%% -*- 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_prv_release). + +-behaviour(rcl_provider). + +-export([init/1, + do/1, + format_error/1]). + +-include_lib("relcool/include/relcool.hrl"). + +%%============================================================================ +%% API +%%============================================================================ +-spec init(rcl_state:t()) -> {ok, rcl_state:t()}. +init(State) -> + {ok, State}. + +%% @doc recursively dig down into the library directories specified in the state +%% looking for OTP Applications +-spec do(rcl_state:t()) -> {ok, rcl_state:t()} | relcool:error(). +do(State) -> + DepGraph = create_dep_graph(State), + find_default_release(State, DepGraph). + +-spec format_error(ErrorDetail::term()) -> iolist(). +format_error(no_goals_specified) -> + "No goals specified for this release ~n"; +format_error({no_release_name, Vsn}) -> + io_lib:format("A target release version was specified (~s) but no name", [Vsn]); +format_error({invalid_release_info, Info}) -> + io_lib:format("Target release information is in an invalid format ~p", [Info]); +format_error({multiple_release_names, RelA, RelB}) -> + io_lib:format("No default release name was specified and there are multiple " + "releases in the config: ~s, ~s", + [RelA, RelB]); +format_error(no_releases_in_system) -> + "No releases have been specified in the system!"; +format_error({no_releases_for, RelName}) -> + io_lib:format("No releases exist in the system for ~s!", [RelName]); +format_error({release_not_found, {RelName, RelVsn}}) -> + io_lib:format("No releases exist in the system for ~p:~s!", [RelName, RelVsn]); +format_error({failed_solve, Error}) -> + io_lib:format("Failed to solve release:\n ~s", + [rcl_depsolver:format_error({error, Error})]). + +%%%=================================================================== +%%% Internal Functions +%%%=================================================================== +-spec create_dep_graph(rcl_state:t()) -> rcl_depsolver:t(). +create_dep_graph(State) -> + Apps = rcl_state:available_apps(State), + Graph0 = rcl_depsolver:new_graph(), + lists:foldl(fun(App, Graph1) -> + AppName = rcl_app_info:name(App), + AppVsn = rcl_app_info:vsn(App), + Deps = rcl_app_info:active_deps(App) ++ + rcl_app_info:library_deps(App), + rcl_depsolver:add_package_version(Graph1, + AppName, + AppVsn, + Deps) + end, Graph0, Apps). + + +-spec find_default_release(rcl_state:t(), rcl_depsolver:t()) -> + {ok, rcl_state:t()} | relcool:error(). +find_default_release(State, DepGraph) -> + case rcl_state:default_configured_release(State) of + {undefined, undefined} -> + resolve_default_release(State, DepGraph); + {RelName, undefined} -> + resolve_default_version(State, DepGraph, RelName); + {undefined, Vsn} -> + ?RCL_ERROR({no_release_name, Vsn}); + {RelName, RelVsn} -> + solve_release(State, DepGraph, RelName, RelVsn) + end. + +resolve_default_release(State0, DepGraph) -> + %% Here we will just get the highest versioned release and run that. + case lists:sort(fun release_sort/2, + ec_dictionary:to_list(rcl_state:configured_releases(State0))) of + [{{RelName, RelVsn}, _} | _] -> + State1 = rcl_state:default_configured_release(State0, RelName, RelVsn), + solve_release(State1, DepGraph, RelName, RelVsn); + [] -> + ?RCL_ERROR(no_releases_in_system) + end. + +resolve_default_version(State0, DepGraph, RelName) -> + %% Here we will just get the lastest version and run that. + AllReleases = ec_dictionary:to_list(rcl_state:configured_releases(State0)), + SpecificReleases = [Rel || Rel={{PossibleRelName, _}, _} <- AllReleases, + PossibleRelName =:= RelName], + case lists:sort(fun release_sort/2, SpecificReleases) of + [{{RelName, RelVsn}, _} | _] -> + State1 = rcl_state:default_configured_release(State0, RelName, RelVsn), + solve_release(State1, DepGraph, RelName, RelVsn); + [] -> + ?RCL_ERROR({no_releases_for, RelName}) + end. + +-spec release_sort({{rcl_release:name(),rcl_release:vsn()}, term()}, + {{rcl_release:name(),rcl_release:vsn()}, term()}) -> + boolean(). +release_sort({{RelName, RelVsnA}, _}, + {{RelName, RelVsnB}, _}) -> + ec_semver:lte(RelVsnA, RelVsnB); +release_sort({{RelNameA, RelVsnA}, _}, {{RelNameB, RelVsnB}, _}) -> + %% The release names are different. When the releases are named differently + %% we can not just take the lastest version. You *must* provide a default + %% release name at least. So we throw an error here that the top can catch + %% and return + erlang:atom_to_list(RelNameA) =< erlang:atom_to_list(RelNameB) andalso + ec_semver:lte(RelVsnA, RelVsnB). + +solve_release(State0, DepGraph, RelName, RelVsn) -> + rcl_log:debug(rcl_state:log(State0), + "Solving Release ~p-~s~n", + [RelName, RelVsn]), + try + Release = rcl_state:get_configured_release(State0, RelName, RelVsn), + Goals = rcl_release:goals(Release), + case Goals of + [] -> + ?RCL_ERROR(no_goals_specified); + _ -> + case rcl_depsolver:solve(DepGraph, Goals) of + {ok, Pkgs} -> + set_resolved(State0, Release, Pkgs); + {error, Error} -> + ?RCL_ERROR({failed_solve, Error}) + end + end + catch + throw:not_found -> + ?RCL_ERROR({release_not_found, RelName, RelVsn}) + end. + +set_resolved(State, Release0, Pkgs) -> + case rcl_release:realize(Release0, Pkgs, rcl_state:available_apps(State)) of + {ok, Release1} -> + rcl_log:info(rcl_state:log(State), + "Resolved ~p-~s~n", + [rcl_release:name(Release1), + rcl_release:vsn(Release1)]), + rcl_log:debug(rcl_state:log(State), + fun() -> + rcl_release:format(1, Release1) + end), + {ok, rcl_state:add_realized_release(State, Release1)}; + {error, E} -> + ?RCL_ERROR({release_error, E}) + end. + +%%%=================================================================== +%%% Test Functions +%%%=================================================================== + +-ifndef(NOTEST). +-include_lib("eunit/include/eunit.hrl"). + +-endif. |