windows testing

Signed-off-by: Austin Ziegler <austin@zieglers.ca>

Author: halostatue

Gemfile

@@ -6,6 +6,7 @@ source "https://rubygems.org/"
 
 group :development do
   gem "solargraph", platform: :mri
+  gem "fiddle", platform: :windows
 end
 
 gemspec

lib/minitar.rb

@@ -83,7 +83,10 @@ def open(dest, mode = "r", &)
     end
   end
 
-  def windows? = RbConfig::CONFIG["host_os"] =~ /^(mswin|mingw|cygwin)/ # :nodoc:
+  def windows? = # :nodoc:
+    RUBY_PLATFORM =~ /^(?:cyginw|mingw|mswin)/i ||
+      RbConfig::CONFIG["host_os"].to_s =~ /^(cygwin|mingw|mswin|windows)/i ||
+      File::ALT_SEPARATOR == "\\"
 
   # A convenience method to pack the provided +data+ as a file named +entry+. +entry+ may
   # either be a name or a Hash with the fields described below. When only a name is

minitar.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.metadata = { "bug_tracker_uri" => "https://github.com/halostatue/minitar/issues", "changelog_uri" => "https://github.com/halostatue/minitar/blob/main/CHANGELOG.md", "rubygems_mfa_required" => "true", "source_code_uri" => "https://github.com/halostatue/minitar" } if s.respond_to? :metadata=
   s.require_paths = ["lib".freeze]
   s.authors = ["Austin Ziegler".freeze]
-  s.date = "2025-09-03"
+  s.date = "2025-09-07"
   s.description = "The minitar library is a pure-Ruby library that operates on POSIX tar(1) archive files.  minitar (previously called Archive::Tar::Minitar) is based heavily on code originally written by Mauricio Julio Fern\u00E1ndez Pradier for the rpa-base project.".freeze
   s.email = ["halostatue@gmail.com".freeze]
   s.extra_rdoc_files = ["CHANGELOG.md".freeze, "CODE_OF_CONDUCT.md".freeze, "CONTRIBUTING.md".freeze, "CONTRIBUTORS.md".freeze, "LICENCE.md".freeze, "Manifest.txt".freeze, "README.md".freeze, "SECURITY.md".freeze, "docs/bsdl.txt".freeze, "docs/ruby.txt".freeze, "licenses/bsdl.txt".freeze, "licenses/dco.txt".freeze, "licenses/ruby.txt".freeze]

test/support/minitar_test_helpers/tarball.rb

@@ -6,15 +6,16 @@
 module Minitar::TestHelpers::Tarball
   private
 
-  tar_version = `tar --version`
-
-  GNU_TAR =
-    case tar_version
-    when /\(GNU tar\)|Free Software Foundation/
-      `which tar`.chomp
-    when /bsdtar/
-      `which gtar`.chomp
-    end.freeze
+  GNU_TAR = %w[tar gtar].find { |program|
+    path = `bash -c "command -v '#{program}'"`.chomp
+
+    if path.empty?
+      false
+    else
+      version = `#{program} --version`.chomp
+      version =~ /\(GNU tar\)|Free Software Foundation/
+    end
+  }.freeze
 
   # Given the +original_files+ file hash (input to +create_tar_string+) and the
   # +extracted_files+ file has (output from +extract_tar_string+), ensures that the tar
@@ -128,16 +129,24 @@ def prepare_workspace(with_files:)
 
       if _2.nil?
         full_path.mkpath
+
+        assert full_path.directory?, "#{full_path} should be created as a directory"
       else
         full_path.dirname.mkpath
         full_path.write(_2)
+
+        assert full_path.file?, "#{full_path} should be created as a file"
       end
     end
   end
 
   def gnu_tar_create_in_workspace
     missing_workspace!
 
+    if Minitar.windows?
+      p @workspace.tarball.to_s, @workspace.source.to_s
+    end
+
     system(
       GNU_TAR, "-cf", @workspace.tarball.to_s, "-C", @workspace.source.to_s, ".",
       exception: true

test/test_gnu_tar_compatibility.rb

@@ -81,7 +81,8 @@ def test_gnu_tar_list_compatibility_with_long_filenames
 
       list_output = gnu_tar_list_in_workspace
       files.each_key do |name|
-        assert list_output.find { _1 == name }, "#{name} not present in GNU tar list output"
+        assert list_output.find { _1 == name },
+          "#{name} not present in GNU tar list output: #{list_output}"
       end
 
       gnu_tar_extract_in_workspace