feat: update a single dependency

2 files changed, 8 insertions, 3 deletions

diff --git a/lib/dependabot/cli.rb b/lib/dependabot/cli.rb
index 80d01ad..67d6339 100644
--- a/lib/dependabot/cli.rb
+++ b/lib/dependabot/cli.rb
@@ -7,7 +7,8 @@ require "dependabot/cli/scan"
 module Dependabot
   module CLI
     class Application < Thor
-      desc "scan [DIRECTORY | FILE]", "Scan a directory or file for dependencies to update"
+      desc "scan [OPTION]... [FILE]", "Scan a directory or file for dependencies to update"
+      method_option :dependency, aliases: "-d", type: :string, desc: "Update a specific dependency", default: nil
       method_option :push, aliases: "-p", type: :boolean, desc: "Push the update as a pull request. Default: --no-push", default: false
       method_option :recursive, aliases: "-r", type: :boolean, desc: "Perform a recursive. Default: --no-recursive", default: false
       def scan(path = Pathname.pwd)
diff --git a/lib/dependabot/cli/scan.rb b/lib/dependabot/cli/scan.rb
index 4c29623..90bf4fb 100644
--- a/lib/dependabot/cli/scan.rb
+++ b/lib/dependabot/cli/scan.rb
@@ -12,7 +12,7 @@ module Dependabot
 
       def run
         each_dependency do |dependency|
-          publish_update_for(dependency)
+          update(dependency) if match?(dependency)
         end
       end
 
@@ -30,10 +30,14 @@ module Dependabot
         end
       end
 
-      def publish_update_for(dependency)
+      def update(dependency)
         ::Dependabot.logger.debug("Updating #{dependency.name}…")
         ::Dependabot::Publish.new(dependency).update!(push: options[:push])
       end
+
+      def match?(dependency)
+        options[:dependency].empty? || options[:dependency].include?(dependency.name)
+      end
     end
   end
 end