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%%% Mock a package resource and create an app magically for each URL submitted.
-module(mock_pkg_resource).
-export([mock/0, mock/1, unmock/0]).
-define(MOD, rebar_pkg_resource).
-include("rebar.hrl").
%%%%%%%%%%%%%%%%%
%%% Interface %%%
%%%%%%%%%%%%%%%%%
%% @doc same as `mock([])'.
mock() -> mock([]).
%% @doc Mocks a fake version of the git resource fetcher that creates
%% empty applications magically, rather than trying to download them.
%% Specific config options are explained in each of the private functions.
-spec mock(Opts) -> ok when
Opts :: [Option],
Option :: {upgrade, [App]}
| {cache_dir, string()}
| {default_vsn, Vsn}
| {override_vsn, [{App, Vsn}]}
| {not_in_index, [{App, Vsn}]}
| {pkgdeps, [{{App,Vsn}, [Dep]}]},
App :: string(),
Dep :: {App, string(), {pkg, App, Vsn, Hash}},
Vsn :: string(),
Hash :: string() | undefined.
mock(Opts) ->
meck:new(?MOD, [no_link, passthrough]),
mock_lock(Opts),
mock_update(Opts),
mock_vsn(Opts),
mock_download(Opts),
mock_pkg_index(Opts),
ok.
unmock() ->
meck:unload(?MOD),
meck:unload(rebar_packages).
%%%%%%%%%%%%%%%
%%% Private %%%
%%%%%%%%%%%%%%%
%% @doc creates values for a lock file.
mock_lock(_) ->
meck:expect(?MOD, lock, fun(AppInfo, _) ->
{pkg, Name, Vsn, Hash, _RepoConfig} = rebar_app_info:source(AppInfo),
{pkg, Name, Vsn, Hash}
end).
%% @doc The config passed to the `mock/2' function can specify which apps
%% should be updated on a per-name basis: `{update, ["App1", "App3"]}'.
mock_update(Opts) ->
ToUpdate = proplists:get_value(upgrade, Opts, []),
meck:expect(
?MOD, needs_update,
fun(AppInfo, _) ->
{pkg, App, _Vsn, _Hash, _} = rebar_app_info:source(AppInfo),
lists:member(binary_to_list(App), ToUpdate)
end).
%% @doc Replicated an unsupported call.
mock_vsn(_Opts) ->
meck:expect(
?MOD, make_vsn,
fun(_AppInfo, _) ->
{error, "Replacing version of type pkg not supported."}
end).
%% @doc For each app to download, create a dummy app on disk instead.
%% The configuration for this one (passed in from `mock/1') includes:
%%
%% - Specify a version with `{pkg, _, Vsn, _}'
%% - Dependencies for each application must be passed of the form:
%% `{pkgdeps, [{"app1", [{app2, ".*", {pkg, ...}}]}]}' -- basically
%% the `pkgdeps' option takes a key/value list of terms to output directly
%% into a `rebar.config' file to describe dependencies.
mock_download(Opts) ->
Deps = proplists:get_value(pkgdeps, Opts, []),
Config = proplists:get_value(config, Opts, []),
meck:expect(
?MOD, download,
fun (Dir, AppInfo, _, _) ->
{pkg, AppBin, Vsn, _, _} = rebar_app_info:source(AppInfo),
App = rebar_utils:to_list(AppBin),
filelib:ensure_dir(Dir),
AppDeps = proplists:get_value({App,Vsn}, Deps, []),
{ok, AppInfo1} = rebar_test_utils:create_app(
Dir, App, rebar_utils:to_list(Vsn),
[kernel, stdlib] ++ [element(1,D) || D <- AppDeps]
),
rebar_test_utils:create_config(Dir, [{deps, AppDeps}]++Config),
TarApp = App++"-"++rebar_utils:to_list(Vsn)++".tar",
Metadata = #{<<"app">> => AppBin,
<<"version">> => Vsn},
Files = all_files(rebar_app_info:dir(AppInfo1)),
{ok, {Tarball, _Checksum}} = hex_tarball:create(Metadata, archive_names(Dir, Files)),
Archive = filename:join([Dir, TarApp]),
file:write_file(Archive, Tarball),
Cache = proplists:get_value(cache_dir, Opts, filename:join(Dir,"cache")),
Cached = filename:join([Cache, TarApp]),
filelib:ensure_dir(Cached),
rebar_file_utils:mv(Archive, Cached),
ok
end).
%% @doc On top of the pkg resource mocking, we need to mock the package
%% index.
%%
%% A special option, `{not_in_index, [App]}' lets the index leave out
%% specific applications otherwise listed.
mock_pkg_index(Opts) ->
Deps = proplists:get_value(pkgdeps, Opts, []),
Repos = proplists:get_value(repos, Opts, [<<"hexpm">>]),
Skip = proplists:get_value(not_in_index, Opts, []),
%% Dict: {App, Vsn}: [{<<"link">>, <<>>}, {<<"deps">>, []}]
%% Index: all apps and deps in the index
Dict = find_parts(Deps, Skip),
to_index(Deps, Dict, Repos),
meck:new(rebar_packages, [passthrough, no_link]),
meck:expect(rebar_packages, update_package,
fun(_, _, _State) -> ok end),
meck:expect(rebar_packages, verify_table,
fun(_State) -> true end).
%%%%%%%%%%%%%%%
%%% Helpers %%%
%%%%%%%%%%%%%%%
all_files(Dir) ->
filelib:wildcard(filename:join([Dir, "**"])).
archive_names(Dir, Files) ->
[{(F -- Dir) -- "/", F} || F <- Files].
find_parts(Apps, Skip) -> find_parts(Apps, Skip, dict:new()).
find_parts([], _, Acc) -> Acc;
find_parts([{AppName, Deps}|Rest], Skip, Acc) ->
case lists:member(AppName, Skip) orelse dict:is_key(AppName,Acc) of
true -> find_parts(Rest, Skip, Acc);
false ->
AccNew = dict:store(AppName,
Deps,
Acc),
find_parts(Rest, Skip, AccNew)
end.
parse_deps(Deps) ->
[{maps:get(app, D, Name), {pkg, Name, Constraint, undefined}} || D=#{package := Name,
requirement := Constraint} <- Deps].
to_index(AllDeps, Dict, Repos) ->
catch ets:delete(?PACKAGE_TABLE),
rebar_packages:new_package_table(),
dict:fold(
fun({N, V}, Deps, _) ->
DepsList = [#{package => DKB,
app => DKB,
requirement => DVB,
source => {pkg, DKB, DVB, undefined}}
|| {DK, DV} <- Deps,
DKB <- [ec_cnv:to_binary(DK)],
DVB <- [ec_cnv:to_binary(DV)]],
Repo = rebar_test_utils:random_element(Repos),
ets:insert(?PACKAGE_TABLE, #package{key={N, ec_semver:parse(V), Repo},
dependencies=parse_deps(DepsList),
retired=false,
checksum = <<"checksum">>})
end, ok, Dict),
lists:foreach(fun({{Name, Vsn}, _}) ->
case lists:any(fun(R) ->
ets:member(?PACKAGE_TABLE, {ec_cnv:to_binary(Name), ec_semver:parse(Vsn), R})
end, Repos) of
false ->
Repo = rebar_test_utils:random_element(Repos),
ets:insert(?PACKAGE_TABLE, #package{key={ec_cnv:to_binary(Name), ec_semver:parse(Vsn), Repo},
dependencies=[],
retired=false,
checksum = <<"checksum">>});
true ->
ok
end
end, AllDeps).
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