commands/plugin: support installing from file

lib/vagrant/bundler.rb

@@ -1,3 +1,4 @@
+require "monitor"
 require "pathname"
 require "set"
 require "tempfile"
@@ -17,6 +18,8 @@ module Vagrant
     end
 
     def initialize
+      @monitor  = Monitor.new
+
       @gem_home = ENV["GEM_HOME"]
       @gem_path = ENV["GEM_PATH"]
 
@@ -59,6 +62,41 @@ module Vagrant
       internal_install(plugins, nil)
     end
 
+    # Installs a local '*.gem' file so that Bundler can find it.
+    #
+    # @param [String] path Path to a local gem file.
+    # @return [Gem::Specification]
+    def install_local(path)
+      # We have to do this load here because this file can be loaded
+      # before RubyGems is actually loaded.
+      require "rubygems/dependency_installer"
+      begin
+        require "rubygems/format"
+      rescue LoadError
+        # rubygems 2.x
+      end
+
+      # If we're installing from a gem file, determine the name
+      # based on the spec in the file.
+      pkg = if defined?(Gem::Format)
+              # RubyGems 1.x
+              Gem::Format.from_file_by_path(path)
+            else
+              # RubyGems 2.x
+              Gem::Package.new(path)
+            end
+
+      # Install the gem manually. If the gem exists locally, then
+      # Bundler shouldn't attempt to get it remotely.
+      with_isolated_gem do
+        installer = Gem::DependencyInstaller.new(
+          :document => [], :prerelease => false)
+        installer.install(path, "= #{pkg.spec.version}")
+      end
+
+      pkg.spec
+    end
+
     # Update updates the given plugins, or every plugin if none is given.
     #
     # @param [Hash] plugins
@@ -84,6 +122,21 @@ module Vagrant
       end
     end
 
+    # During the duration of the yielded block, Bundler loud output
+    # is enabled.
+    def verbose
+      @monitor.synchronize do
+        begin
+          old_ui = ::Bundler.ui
+          require 'bundler/vendored_thor'
+          ::Bundler.ui = ::Bundler::UI::Shell.new
+          yield
+        ensure
+          ::Bundler.ui = old_ui
+        end
+      end
+    end
+
     protected
 
     # Builds a valid Gemfile for use with Bundler given the list of

lib/vagrant/plugin/manager.rb

@@ -29,6 +29,13 @@ module Vagrant
       # @param [String] name Name of the plugin (gem)
       # @return [Gem::Specification]
       def install_plugin(name, **opts)
+        if name =~ /\.gem$/
+          # If this is a gem file, then we install that gem locally.
+          local_spec = Vagrant::Bundler.instance.install_local(name)
+          name       = local_spec.name
+          opts[:version] = "= #{local_spec.version}"
+        end
+
         plugins = installed_plugins
         plugins[name] = {
           "require"     => opts[:require],
@@ -37,11 +44,19 @@ module Vagrant
         }
 
         result = nil
+        install_lambda = lambda do
           Vagrant::Bundler.instance.install(plugins).each do |spec|
             next if spec.name != name
             next if result && result.version >= spec.version
             result = spec
           end
+        end
+
+        if opts[:verbose]
+          Vagrant::Bundler.instance.verbose(&install_lambda)
+        else
+          install_lambda.call
+        end
 
         # Add the plugin to the state file
         @global_file.add_plugin(

plugins/commands/plugin/action/install_gem.rb

@@ -1,12 +1,3 @@
-require "rubygems"
-require "rubygems/dependency_installer"
-
-begin
-  require "rubygems/format"
-rescue LoadError
-  # rubygems 2.x
-end
-
 require "log4r"
 require "vagrant/plugin/manager"
 
@@ -27,24 +18,6 @@ module VagrantPlugins
           sources     = env[:plugin_sources]
           version     = env[:plugin_version]
 
-          # Determine the plugin name we'll look for in the installed set
-          # in order to determine the version and all that.
-          find_plugin_name = plugin_name
-          if plugin_name =~ /\.gem$/
-            # If we're installing from a gem file, determine the name
-            # based on the spec in the file.
-            pkg = if defined?(Gem::Format)
-              # RubyGems 1.x
-              Gem::Format.from_file_by_path(plugin_name)
-            else
-              # RubyGems 2.x
-              Gem::Package.new(plugin_name)
-            end
-
-            find_plugin_name = pkg.spec.name
-            version = pkg.spec.version
-          end
-
           # Install the gem
           plugin_name_label = plugin_name
           plugin_name_label += " --version '#{version}'" if version
@@ -56,7 +29,9 @@ module VagrantPlugins
             plugin_name,
             version: version,
             require: entrypoint,
-            sources: sources,)
+            sources: sources,
+            verbose: !!env[:plugin_verbose],
+          )
 
           # Record it so we can uninstall if something goes wrong
           @installed_plugin_name = plugin_spec.name

plugins/commands/plugin/command/install.rb

@@ -10,12 +10,16 @@ module VagrantPlugins
         include MixinInstallOpts
 
         def execute
-          options = {}
+          options = { verbose: false }
 
           opts = OptionParser.new do |o|
             o.banner = "Usage: vagrant plugin install <name> [-h]"
             o.separator ""
             build_install_opts(o, options)
+
+            o.on("--verbose", "Enable verbose output for plugin installation") do |v|
+              options[:verbose] = v
+            end
           end
 
           # Parse the options
@@ -28,7 +32,8 @@ module VagrantPlugins
             :plugin_entry_point => options[:entry_point],
             :plugin_version     => options[:plugin_version],
             :plugin_sources     => options[:plugin_sources],
-            :plugin_name        => argv[0]
+            :plugin_name        => argv[0],
+            :plugin_verbose     => options[:verbose]
           })
 
           # Success, exit status 0