Merge pull request #4215 from dependabot/brrygrdn/dry-run-requires-de…

…v-shell

bin/dry-run.rb requires a development container to run

README.md

@@ -101,16 +101,13 @@ $ bin/docker-dev-shell
 
 ### Dry run script
 
-*Note: you must have run `bundle install` in the `omnibus` directory before
-running this script.*
-
 You can use the "dry-run" script to simulate a dependency update job, printing
 the diff that would be generated to the terminal. It takes two positional
 arguments: the package manager and the GitHub repo name (including the
 account):
 
 ```bash
-$ cd omnibus && bundle install && cd -
+$ bin/docker-dev-shell
 $ bin/dry-run.rb go_modules rsc/quote
 => fetching dependency files
 => parsing dependency files

bin/dry-run.rb

@@ -35,6 +35,16 @@
 
 # rubocop:disable Style/GlobalVars
 
+require "etc"
+unless Etc.getpwuid(Process.uid).name == "dependabot"
+  puts <<~INFO
+    bin/dry-run.rb is only supported in a developerment container.
+
+    Please use bin/docker-dev-shell first.
+  INFO
+  exit 1
+end
+
 $LOAD_PATH << "./bundler/lib"
 $LOAD_PATH << "./cargo/lib"
 $LOAD_PATH << "./common/lib"