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-module(rebar_hex_repos).
-export([from_state/2,
get_repo_config/2,
auth_config/1,
update_auth_config/2,
format_error/1]).
-ifdef(TEST).
%% exported for test purposes
-export([repos/1, merge_repos/1]).
-endif.
-include("rebar.hrl").
-include_lib("providers/include/providers.hrl").
-export_type([repo/0]).
-type repo() :: #{name => unicode:unicode_binary(),
api_url => binary(),
api_key => binary(),
repo_url => binary(),
repo_public_key => binary(),
repo_verify => binary()}.
from_state(BaseConfig, State) ->
HexConfig = rebar_state:get(State, hex, []),
Repos = repos(HexConfig),
%% auth is stored in a separate config file since the plugin generates and modifies it
Auth = ?MODULE:auth_config(State),
%% add base config entries that are specific to use by rebar3 and not overridable
Repos1 = merge_with_base_and_auth(Repos, BaseConfig, Auth),
%% merge organizations parent repo options into each oraganization repo
update_organizations(Repos1).
-spec get_repo_config(unicode:unicode_binary(), rebar_state:t() | [repo()])
-> {ok, repo()} | error.
get_repo_config(RepoName, Repos) when is_list(Repos) ->
case ec_lists:find(fun(#{name := N}) -> N =:= RepoName end, Repos) of
error ->
throw(?PRV_ERROR({repo_not_found, RepoName}));
{ok, RepoConfig} ->
{ok, RepoConfig}
end;
get_repo_config(RepoName, State) ->
Resources = rebar_state:resources(State),
#{repos := Repos} = rebar_resource_v2:find_resource_state(pkg, Resources),
get_repo_config(RepoName, Repos).
merge_with_base_and_auth(Repos, BaseConfig, Auth) ->
[maps:merge(maps:get(maps:get(name, Repo), Auth, #{}),
maps:merge(Repo, BaseConfig)) || Repo <- Repos].
%% A user's list of repos are merged by name while keeping the order
%% intact. The order is based on the first use of a repo by name in the
%% list. The default repo is appended to the user's list.
repos(HexConfig) ->
HexDefaultConfig = default_repo(),
case [R || R <- HexConfig, element(1, R) =:= repos] of
[] ->
[HexDefaultConfig];
%% we only care if the first element is a replace entry
[{repos, replace, Repos} | _]->
merge_repos(Repos);
Repos ->
RepoList = repo_list(Repos),
merge_repos(RepoList ++ [HexDefaultConfig])
end.
-spec merge_repos([repo()]) -> [repo()].
merge_repos(Repos) ->
lists:foldl(fun(R=#{name := Name}, ReposAcc) ->
%% private organizations include the parent repo before a :
case rebar_string:split(Name, <<":">>) of
[Repo, Org] ->
update_repo_list(R#{name => Name,
organization => Org,
parent => Repo}, ReposAcc);
_ ->
update_repo_list(R, ReposAcc)
end
end, [], Repos).
update_organizations(Repos) ->
lists:map(fun(Repo=#{organization := Organization,
parent := ParentName}) ->
{ok, Parent} = get_repo_config(ParentName, Repos),
ParentRepoUrl = rebar_utils:to_list(maps:get(repo_url, Parent)),
{ok, RepoUrl} =
rebar_utils:url_append_path(ParentRepoUrl,
filename:join("repos", rebar_utils:to_list(Organization))),
%% still let the organization config override this constructed repo url
maps:merge(Parent#{repo_url => rebar_utils:to_binary(RepoUrl)}, Repo);
(Repo) ->
Repo
end, Repos).
update_repo_list(R=#{name := N}, [H=#{name := HN} | Rest]) when N =:= HN ->
[maps:merge(R, H) | Rest];
update_repo_list(R, [H | Rest]) ->
[H | update_repo_list(R, Rest)];
update_repo_list(R, []) ->
[R].
default_repo() ->
HexDefaultConfig = hex_core:default_config(),
HexDefaultConfig#{name => ?PUBLIC_HEX_REPO}.
repo_list([]) ->
[];
repo_list([{repos, Repos} | T]) ->
Repos ++ repo_list(T);
repo_list([{repos, replace, Repos} | T]) ->
Repos ++ repo_list(T).
format_error({repo_not_found, RepoName}) ->
io_lib:format("The repo ~ts was not found in the configuration.", [RepoName]).
%% auth functions
%% authentication is in a separate config file because the hex plugin updates it
-spec auth_config_file(rebar_state:t()) -> file:filename_all().
auth_config_file(State) ->
filename:join(rebar_dir:global_config_dir(State), ?HEX_AUTH_FILE).
-spec auth_config(rebar_state:t()) -> map().
auth_config(State) ->
case file:consult(auth_config_file(State)) of
{ok, [Config]} ->
Config;
_ ->
#{}
end.
-spec update_auth_config(map(), rebar_state:t()) -> ok.
update_auth_config(Updates, State) ->
Config = auth_config(State),
AuthConfigFile = auth_config_file(State),
ok = filelib:ensure_dir(AuthConfigFile),
NewConfig = iolist_to_binary([io_lib:print(maps:merge(Config, Updates)) | ".\n"]),
ok = file:write_file(AuthConfigFile, NewConfig).
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