Merge pull request #949 from nanoc/gh-948-prune-w-non-existing-output…

…-dir

Fix prune crash when output dir does not exist

lib/nanoc/extra/pruner.rb

@@ -26,6 +26,8 @@ def initialize(site, dry_run: false, exclude: [])
     def run
       require 'find'
 
+      return unless File.directory?(site.config[:output_dir])
+
       # Get compiled files
       # FIXME: requires #build_reps to have been called
       all_raw_paths = site.compiler.reps.flat_map { |r| r.raw_paths.values }

spec/nanoc/regressions/gh_948_spec.rb

@@ -0,0 +1,16 @@
+describe 'GH-948', site: true, stdio: true do
+  before do
+    File.write('content/foo.md', 'Foo!')
+
+    File.open('nanoc.yaml', 'w') do |io|
+      io << 'prune:' << "\n"
+      io << '  auto_prune: true' << "\n"
+    end
+
+    FileUtils.rm_rf('output')
+  end
+
+  it 'does not crash when output dir is not present' do
+    Nanoc::CLI.run(%w(compile))
+  end
+end