only load packages when needed

src/rebar3.erl

@@ -105,7 +105,6 @@ run_aux(State, RawArgs) ->
     {ok, Providers} = application:get_env(rebar, providers),
     %% Providers can modify profiles stored in opts, so set default after initializing providers
     State4 = rebar_state:create_logic_providers(Providers, State3),
-    rebar_packages:packages(State4),
     State5 = rebar_plugins:project_apps_install(State4),
     State6 = rebar_state:default(State5, rebar_state:opts(State5)),
 
@@ -285,7 +284,6 @@ state_from_global_config(Config, GlobalConfigFile) ->
                       [] ->
                           GlobalConfigThrowAway;
                       GlobalPluginsToInstall ->
-                          rebar_packages:packages(GlobalConfigThrowAway),
                           rebar_plugins:handle_plugins(global,
                                                        GlobalPluginsToInstall,
                                                        GlobalConfigThrowAway)

src/rebar_packages.erl

@@ -8,6 +8,7 @@
         ,package_dir/1
         ,registry_checksum/2
         ,find_highest_matching/4
+        ,verify_table/1
         ,format_error/1]).
 
 -export_type([package/0]).
@@ -51,7 +52,7 @@ load_and_verify_version(State) ->
 
 deps(Name, Vsn, State) ->
     try
-        verify_table(State),
+        ?n>MODULE:verify_table(State),
         ets:lookup_element(?PACKAGE_TABLE, {ec_cnv:to_binary(Name), ec_cnv:to_binary(Vsn)}, 2)
     catch
         _:_ ->
@@ -82,7 +83,7 @@ package_dir(State) ->
 
 registry_checksum({pkg, Name, Vsn}, State) ->
     try
-        verify_table(State),
+        ?n>MODULE:verify_table(State),
         ets:lookup_element(?PACKAGE_TABLE, {Name, Vsn}, 3)
     catch
         _:_ ->
@@ -105,7 +106,7 @@ registry_checksum({pkg, Name, Vsn}, State) ->
 %% `~> 2.0` | `>= 2.0.0 and < 3.0.0`
 %% `~> 2.1` | `>= 2.1.0 and < 3.0.0`
 find_highest_matching(Dep, Constraint, Table, State) ->
-    verify_table(State),
+    ?n>MODULE:verify_table(State),
     try ets:lookup_element(Table, Dep, 2) of
         [[HeadVsn | VsnTail]] ->
             {ok, handle_vsns(Constraint, HeadVsn, VsnTail)};
@@ -145,4 +146,4 @@ format_error({missing_package, Package, Version}) ->
     io_lib:format("Package not found in registry: ~s-~s. Try to fix with `rebar3 update`", [Package, Version]).
 
 verify_table(State) ->
-    ets:info(?PACKAGE_TABLE, named_table) =:= true orelse ?n>MODULE:load_and_verify_version(State).
+    ets:info(?PACKAGE_TABLE, named_table) =:= true orelse load_and_verify_version(State).

src/rebar_prv_packages.erl

@@ -27,6 +27,7 @@ init(State) ->
 
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do(State) ->
+    rebar_packages:packages(State),
     print_packages(),
     {ok, State}.
 

test/mock_pkg_resource.erl

@@ -117,7 +117,7 @@ mock_pkg_index(Opts) ->
     meck:new(rebar_packages, [passthrough, no_link]),
     meck:expect(rebar_packages, packages,
                 fun(_State) -> to_index(Deps, Dict) end),
-    meck:expect(rebar_packages, load_and_verify_version,
+    meck:expect(rebar_packages, verify_table,
                 fun(_State) -> to_index(Deps, Dict), true end).
 
 %%%%%%%%%%%%%%%