From 7bc107d9781eb28a1ec83ad04452ce0eea1ec812 Mon Sep 17 00:00:00 2001
From: Matthew Draper <matthew@trebex.net>
Date: Fri, 18 Oct 2019 02:13:09 +1030
Subject: [PATCH] Provide enough empty shells that rake-compiler can (partly)
 work

We're currently still not aiming to be able to produce a packaged gem --
but we can fake out the parts rake-compiler needs while it's just trying
to set up its rake tasks.

The goal is to allow a rake-compiler-using gem (such as Puma) to work in
local use, and support `rake compile`, under Gel. Actual packaging for
distribution is best left to Bundler & Rubygems.

Fixes #77
---
 lib/gel/compatibility/bundler/gem_tasks.rb     |  0
 lib/gel/compatibility/rubygems.rb              | 12 ++++++++++++
 lib/gel/compatibility/rubygems/package_task.rb |  7 +++++++
 lib/gel/direct_gem.rb                          |  4 ++--
 4 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 lib/gel/compatibility/bundler/gem_tasks.rb
 create mode 100644 lib/gel/compatibility/rubygems/package_task.rb

diff --git a/lib/gel/compatibility/bundler/gem_tasks.rb b/lib/gel/compatibility/bundler/gem_tasks.rb
new file mode 100644
index 0000000..e69de29
diff --git a/lib/gel/compatibility/rubygems.rb b/lib/gel/compatibility/rubygems.rb
index 83b6504..83f4457 100644
--- a/lib/gel/compatibility/rubygems.rb
+++ b/lib/gel/compatibility/rubygems.rb
@@ -32,6 +32,10 @@ class << self
       include Enumerable
     end
 
+    def self.load(filename)
+      new(Gel::DirectGem.new(File.dirname(filename), File.basename(filename, ".gemspec")))
+    end
+
     def self.find_by_name(name, *requirements)
       if g = Gel::Environment.find_gem(name, *requirements)
         new(g)
@@ -76,6 +80,14 @@ def require_paths
         Pathname.new(path).relative_path_from(base).to_s
       end
     end
+
+    def platform
+      nil
+    end
+
+    def files
+      []
+    end
   end
 
   class DependencyInstaller
diff --git a/lib/gel/compatibility/rubygems/package_task.rb b/lib/gel/compatibility/rubygems/package_task.rb
new file mode 100644
index 0000000..f52f6fb
--- /dev/null
+++ b/lib/gel/compatibility/rubygems/package_task.rb
@@ -0,0 +1,7 @@
+class Gem::PackageTask
+  def initialize(*)
+  end
+
+  def method_missing(*)
+  end
+end
diff --git a/lib/gel/direct_gem.rb b/lib/gel/direct_gem.rb
index da4d9fc..814d0d7 100644
--- a/lib/gel/direct_gem.rb
+++ b/lib/gel/direct_gem.rb
@@ -20,10 +20,10 @@ def initialize(root, name, version = nil)
     info = {
       bindir: gemspec.bindir || "bin",
       executables: gemspec.executables,
-      require_paths: gemspec.require_paths || [gemspec.require_path].compact,
+      require_paths: gemspec.require_paths || [gemspec.require_path || "lib"].compact,
       dependencies: gemspec.runtime_dependencies,
     }
 
-    super(root, name, version || Gel::Support::GemVersion.new(gemspec.version).to_s, gemspec.extensions, info)
+    super(root, name, version || Gel::Support::GemVersion.new(gemspec.version).to_s, nil, info)
   end
 end