[Init] Check if the current directory is writable

2 files changed, 21 insertions, 0 deletions

diff --git a/lib/bundler/cli/init.rb b/lib/bundler/cli/init.rb
index fa53e7c74b..40df797269 100644
--- a/lib/bundler/cli/init.rb
+++ b/lib/bundler/cli/init.rb
@@ -13,6 +13,11 @@ module Bundler
         exit 1
       end
 
+      unless File.writable?(Dir.pwd)
+        Bundler.ui.error "Can not create #{gemfile} as the current directory is not writable."
+        exit 1
+      end
+
       if options[:gemspec]
         gemspec = File.expand_path(options[:gemspec])
         unless File.exist?(gemspec)
diff --git a/spec/commands/init_spec.rb b/spec/commands/init_spec.rb
index c1cd7b90c8..7a032c09aa 100644
--- a/spec/commands/init_spec.rb
+++ b/spec/commands/init_spec.rb
@@ -64,6 +64,22 @@ RSpec.describe "bundle init" do
     end
   end
 
+  context "when the dir is not writable by the current user" do
+    let(:subdir) { "child_dir" }
+
+    it "notifies the user that it can not write to it" do
+      FileUtils.mkdir bundled_app(subdir)
+      FileUtils.chmod "a-w", bundled_app(subdir)
+
+      Dir.chdir bundled_app(subdir) do
+        bundle :init
+      end
+
+      expect(out).to include("directory is not writable")
+      expect(bundled_app(subdir)).to be_empty
+    end
+  end
+
   context "when a gems.rb file exists in a parent directory", :bundler => ">= 2" do
     let(:subdir) { "child_dir" }