Merge pull request #20213 from Homebrew/dug-20205

Exit non-zero when pinning uninstalled formula

Library/Homebrew/cmd/pin.rb

@@ -25,7 +25,7 @@ module Homebrew
           if f.pinned?
             opoo "#{f.name} already pinned"
           elsif !f.pinnable?
-            onoe "#{f.name} not installed"
+            ofail "#{f.name} not installed"
           else
             f.pin
           end

Library/Homebrew/test/cmd/pin_spec.rb

@@ -11,4 +11,10 @@ RSpec.describe Homebrew::Cmd::Pin do
 
     expect { brew "pin", "testball" }.to be_a_success
   end
+
+  it "fails with an uninstalled Formula", :integration_test do
+    setup_test_formula "testball"
+
+    expect { brew "pin", "testball" }.to be_a_failure
+  end
 end