[Definition] Gracefully handle when the lockfile is missing specs needed to run on the current platform

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index b30ae81623..0349af39f2 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -76,6 +76,7 @@ module Bundler
       @lockfile_contents      = String.new
       @locked_bundler_version = nil
       @locked_ruby_version    = nil
+      @locked_specs_incomplete_for_platform = false
 
       if lockfile && File.exist?(lockfile)
         @lockfile_contents = Bundler.read_file(lockfile)
@@ -529,7 +530,7 @@ module Bundler
     private :sources
 
     def nothing_changed?
-      !@source_changes && !@dependency_changes && !@new_platform && !@path_changes && !@local_changes
+      !@source_changes && !@dependency_changes && !@new_platform && !@path_changes && !@local_changes && !@locked_specs_incomplete_for_platform
     end
 
     def unlocking?
@@ -556,6 +557,7 @@ module Bundler
         [@new_platform, "you added a new platform to your gemfile"],
         [@path_changes, "the gemspecs for path gems changed"],
         [@local_changes, "the gemspecs for git local gems changed"],
+        [@locked_specs_incomplete_for_platform, "the lockfile does not have all gems needed for the current platform"],
       ].select(&:first).map(&:last).join(", ")
     end
 
@@ -802,7 +804,9 @@ module Bundler
       end
 
       resolve = SpecSet.new(converged)
-      resolve = resolve.for(expand_dependencies(deps, true), @unlock[:gems], false, false, false)
+      expanded_deps = expand_dependencies(deps, true)
+      @locked_specs_incomplete_for_platform = !resolve.for(expanded_deps, @unlock[:gems], true, true)
+      resolve = resolve.for(expanded_deps, @unlock[:gems], false, false, false)
       diff    = nil
 
       # Now, we unlock any sources that do not have anymore gems pinned to it