Forward unmodified ARGV to subcommand

spec/integration/subcommand_spec.cr

@@ -0,0 +1,21 @@
+require "./spec_helper"
+
+describe "subcommand" do
+  it "forwards all arguments to subcommand" do
+    create_shard("dummy", "0.1.0")
+    create_executable "dummy", "bin/shards-dummy", %(print "args: "; print ARGV)
+
+    with_path(git_path("dummy/bin")) do
+      output = run("shards dummy --no-color --verbose --unknown other argument")
+      output.should contain(%(args: ["--no-color", "--verbose", "--unknown", "other", "argument"]))
+    end
+  end
+end
+
+private def with_path(path)
+  old_path = ENV["PATH"]
+  ENV["PATH"] = "#{File.expand_path(path)}#{Process::PATH_DELIMITER}#{ENV["PATH"]}"
+  yield
+ensure
+  ENV["PATH"] = old_path
+end

src/cli.cr

@@ -101,7 +101,7 @@ module Shards
         else
           program_name = "shards-#{args[0]}"
           if program_path = Process.find_executable(program_name)
-            run_shards_subcommand(program_path, args)
+            run_shards_subcommand(program_path, cli_options)
           else
             display_help_and_exit(opts)
           end
@@ -119,7 +119,7 @@ module Shards
     {% else %}
       shards_opts = ENV.fetch("SHARDS_OPTS", "").split
     {% end %}
-    ARGV.concat(shards_opts)
+    ARGV.dup.concat(shards_opts)
   end
 
   def self.run_shards_subcommand(process_name, args)