prune - Don't raise an exception if install_path doesn't exist (#557)

Author: mjoerussell

spec/integration/prune_spec.cr

@@ -36,4 +36,9 @@ describe "prune" do
     Dir.cd(application_path) { run "shards prune" }
     installed_dependencies.sort.should eq([".keep_hidden", "keep_not_hidden", "web"])
   end
+
+  it "should not fail if the install directory does not exist" do
+    run "rm -rf #{install_path}"
+    Dir.cd(application_path) { run "shards prune" }
+  end
 end

src/commands/prune.cr

@@ -6,7 +6,7 @@ module Shards
   module Commands
     class Prune < Command
       def run
-        return unless lockfile?
+        return unless lockfile? && Dir.exists?(Shards.install_path)
 
         Dir.each_child(Shards.install_path) do |name|
           path = File.join(Shards.install_path, name)