Add TAILWINDCSS_DEBUG environment variable

lib/tailwindcss/commands.rb

@@ -4,6 +4,7 @@ module Tailwindcss
   module Commands
     class << self
       def compile_command(debug: false, **kwargs)
+        debug ||= ["true", "1"].include?(ENV["TAILWINDCSS_DEBUG"])
         rails_root = defined?(Rails) ? Rails.root : Pathname.new(Dir.pwd)
 
         command = [

test/lib/tailwindcss/commands_test.rb

@@ -33,6 +33,34 @@ def setup
     end
   end
 
+  test ".compile_command debug environment variable" do
+    begin
+      Rails.stub(:root, File) do # Rails.root won't work in this test suite
+        ENV["TAILWINDCSS_DEBUG"] = "0"
+        actual = Tailwindcss::Commands.compile_command
+        assert_kind_of(Array, actual)
+        assert_includes(actual, "--minify")
+
+        ENV["TAILWINDCSS_DEBUG"] = "1"
+        actual = Tailwindcss::Commands.compile_command
+        assert_kind_of(Array, actual)
+        refute_includes(actual, "--minify")
+
+        ENV["TAILWINDCSS_DEBUG"] = "false"
+        actual = Tailwindcss::Commands.compile_command
+        assert_kind_of(Array, actual)
+        assert_includes(actual, "--minify")
+
+        ENV["TAILWINDCSS_DEBUG"] = "true"
+        actual = Tailwindcss::Commands.compile_command
+        assert_kind_of(Array, actual)
+        refute_includes(actual, "--minify")
+      end
+    ensure
+      ENV.delete('TAILWINDCSS_DEBUG')
+    end
+  end
+
   test ".compile_command when Rails compression is on" do
     Rails.stub(:root, File) do # Rails.root won't work in this test suite
       Tailwindcss::Commands.stub(:rails_css_compressor?, true) do