Merge pull request #410 from tsloughter/master

check registry for missing package that may exist for mix

src/rebar_packages.erl

@@ -2,6 +2,7 @@
 
 -export([get_packages/1
         ,registry/1
+        ,check_registry/3
         ,find_highest_matching/3]).
 
 -export_type([package/0]).
@@ -52,6 +53,18 @@ registry(State) ->
             error
     end.
 
+check_registry(Pkg, Vsn, State) ->
+    case rebar_state:registry(State) of
+        {ok, T} ->
+            case ets:lookup(T, Pkg) of
+                [{Pkg, [Vsns]}] ->
+                    lists:member(Vsn, Vsns);
+                _ ->
+                    false
+            end;
+        error ->
+            false
+    end.
 
 %% Hex supports use of ~> to specify the version required for a dependency.
 %% Since rebar3 requires exact versions to choose from we find the highest

src/rebar_prv_install_deps.erl

@@ -99,6 +99,8 @@ format_error({bad_constraint, Name, Constraint}) ->
     io_lib:format("Unable to parse version for package ~s: ~s", [Name, Constraint]);
 format_error({parse_dep, Dep}) ->
     io_lib:format("Failed parsing dep ~p", [Dep]);
+format_error({not_rebar_package, Package, Version}) ->
+    io_lib:format("Package not buildable with rebar3: ~s-~s", [Package, Version]);
 format_error({missing_package, Package, Version}) ->
     io_lib:format("Package not found in registry: ~s-~s", [Package, Version]);
 format_error({cycles, Cycles}) ->
@@ -210,7 +212,7 @@ update_pkg_deps(Profile, Pkgs, Packages, Upgrade, Seen, State) ->
     {Solved, State1}.
 
 handle_pkg_dep(Profile, Pkg, Packages, Upgrade, DepsDir, Fetched, Seen, State) ->
-    AppInfo = package_to_app(DepsDir, Packages, Pkg),
+    AppInfo = package_to_app(DepsDir, Packages, Pkg, State),
     Level = rebar_app_info:dep_level(AppInfo),
     {NewSeen, NewState} = maybe_lock(Profile, AppInfo, Seen, State, Level),
     {_, AppInfo1} = maybe_fetch(AppInfo, Profile, Upgrade, Seen, NewState),
@@ -242,10 +244,15 @@ maybe_lock(Profile, AppInfo, Seen, State, Level) ->
             {Seen, State}
     end.
 
-package_to_app(DepsDir, Packages, {Name, Vsn, Level}) ->
+package_to_app(DepsDir, Packages, {Name, Vsn, Level}, State) ->
     case dict:find({Name, Vsn}, Packages) of
         error ->
-            throw(?PRV_ERROR({missing_package, Name, Vsn}));
+            case rebar_packages:check_registry(Name, Vsn, State) of
+                true ->
+                    throw(?PRV_ERROR({not_rebar_package, Name, Vsn}));
+                false ->
+                    throw(?PRV_ERROR({missing_package, Name, Vsn}))
+            end;
         {ok, P} ->
             PkgDeps = [{PkgName, PkgVsn}
                        || {PkgName,PkgVsn} <- proplists:get_value(<<"deps">>, P, [])],