From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/lib/rubygems/source/local.rb | 129 ++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 jni/ruby/lib/rubygems/source/local.rb

(limited to 'jni/ruby/lib/rubygems/source/local.rb')

diff --git a/jni/ruby/lib/rubygems/source/local.rb b/jni/ruby/lib/rubygems/source/local.rb
new file mode 100644
index 0000000..8057921
--- /dev/null
+++ b/jni/ruby/lib/rubygems/source/local.rb
@@ -0,0 +1,129 @@
+##
+# The local source finds gems in the current directory for fulfilling
+# dependencies.
+
+class Gem::Source::Local < Gem::Source
+
+  def initialize # :nodoc:
+    @specs   = nil
+    @api_uri = nil
+    @uri     = nil
+  end
+
+  ##
+  # Local sorts before Gem::Source and after Gem::Source::Installed
+
+  def <=> other
+    case other
+    when Gem::Source::Installed,
+         Gem::Source::Lock then
+      -1
+    when Gem::Source::Local then
+      0
+    when Gem::Source then
+      1
+    else
+      nil
+    end
+  end
+
+  def inspect # :nodoc:
+    keys = @specs ? @specs.keys.sort : 'NOT LOADED'
+    "#<%s specs: %p>" % [self.class, keys]
+  end
+
+  def load_specs type # :nodoc:
+    names = []
+
+    @specs = {}
+
+    Dir["*.gem"].each do |file|
+      begin
+        pkg = Gem::Package.new(file)
+      rescue SystemCallError, Gem::Package::FormatError
+        # ignore
+      else
+        tup = pkg.spec.name_tuple
+        @specs[tup] = [File.expand_path(file), pkg]
+
+        case type
+        when :released
+          unless pkg.spec.version.prerelease?
+            names << pkg.spec.name_tuple
+          end
+        when :prerelease
+          if pkg.spec.version.prerelease?
+            names << pkg.spec.name_tuple
+          end
+        when :latest
+          tup = pkg.spec.name_tuple
+
+          cur = names.find { |x| x.name == tup.name }
+          if !cur
+            names << tup
+          elsif cur.version < tup.version
+            names.delete cur
+            names << tup
+          end
+        else
+          names << pkg.spec.name_tuple
+        end
+      end
+    end
+
+    names
+  end
+
+  def find_gem gem_name, version = Gem::Requirement.default, # :nodoc:
+               prerelease = false
+    load_specs :complete
+
+    found = []
+
+    @specs.each do |n, data|
+      if n.name == gem_name
+        s = data[1].spec
+
+        if version.satisfied_by?(s.version)
+          if prerelease
+            found << s
+          elsif !s.version.prerelease?
+            found << s
+          end
+        end
+      end
+    end
+
+    found.max_by { |s| s.version }
+  end
+
+  def fetch_spec name # :nodoc:
+    load_specs :complete
+
+    if data = @specs[name]
+      data.last.spec
+    else
+      raise Gem::Exception, "Unable to find spec for #{name.inspect}"
+    end
+  end
+
+  def download spec, cache_dir = nil # :nodoc:
+    load_specs :complete
+
+    @specs.each do |name, data|
+      return data[0] if data[1].spec == spec
+    end
+
+    raise Gem::Exception, "Unable to find file for '#{spec.full_name}'"
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 2, '[Local gems:', ']' do
+      q.breakable
+      q.seplist @specs.keys do |v|
+        q.text v.full_name
+      end
+    end
+  end
+
+end
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