(PUP-12031) Consolidate gem depenendencies & metadata into puppet.gemspec

This commit moves the puppet gem metadata from ext/project_yaml.data and
.gemspec into puppet.gemspec. This change allows the puppet gem to be built
using `gem build puppet.gemspec`. Additionally, for platform specific gems
(e.g. puppet-universal-darwin.gem and puppet-x64-mingw32.gem), there is
conditional logic in puppet.gemspec so platform specific dependecies such as
ffi are appended when building those platform-specific gems.

Author: AriaXLi

.gemspec

@@ -33,21 +33,3 @@ gem_rdoc_options:
   - --main
   - README.md
   - --line-numbers
-gem_platform_dependencies:
-  universal-darwin:
-    gem_runtime_dependencies:
-      CFPropertyList: ['>= 3.0.6', '< 4']
-  x86-mingw32:
-    gem_runtime_dependencies:
-      ffi: '1.15.5'
-      minitar: '~> 0.9'
-  x64-mingw32:
-    gem_runtime_dependencies:
-      ffi: '1.15.5'
-      minitar: '~> 0.9'
-bundle_platforms:
-  universal-darwin: all
-  x86-mingw32: mingw
-  x64-mingw32: x64_mingw
-pre_tasks:
-  'package:apple': 'cfpropertylist'

ext/project_data.yaml

@@ -0,0 +1,44 @@
+Gem::Specification.new do |s|
+  s.name = "puppet"
+  version = "8.7.0"
+  mdata = version.match(/(\d+\.\d+\.\d+)/)
+  s.version = mdata ? mdata[1] : version
+  s.licenses = ['Apache-2.0']
+
+  s.required_rubygems_version = Gem::Requirement.new("> 1.3.1")
+  s.required_ruby_version = Gem::Requirement.new(">= 3.1.0")
+  s.authors = ["Puppet Labs"]
+  s.date = "2012-08-17"
+  s.description = <<~EOF
+    Puppet, an automated administrative engine for your Linux, Unix, and Windows systems, performs administrative tasks
+    (such as adding users, installing packages, and updating server configurations) based on a centralized specification.
+  EOF
+  s.email = "puppet@puppetlabs.com"
+  s.executables = ["puppet"]
+  s.files = Dir['[A-Z]*'] + Dir['install.rb'] + Dir['bin/*'] + Dir['lib/**/*'] + Dir['conf/*'] + Dir['man/**/*'] + Dir['tasks/*'] + Dir['locales/**/*'] + Dir['ext/**/*'] + Dir['examples/**/*']
+  s.license = "Apache-2.0"
+  s.homepage = "https://github.com/puppetlabs/puppet"
+  s.rdoc_options = ["--title", "Puppet - Configuration Management", "--main", "README", "--line-numbers"]
+  s.require_paths = ["lib"]
+  s.summary = "Puppet, an automated configuration management tool"
+  s.specification_version = 4
+  s.add_runtime_dependency(%q<facter>, [">= 4.3.0", "< 5"])
+  s.add_runtime_dependency(%q<semantic_puppet>, "~> 1.0")
+  s.add_runtime_dependency(%q<fast_gettext>, ">= 2.1", "< 3")
+  s.add_runtime_dependency(%q<locale>, "~> 2.1")
+  s.add_runtime_dependency(%q<multi_json>, "~> 1.13")
+  s.add_runtime_dependency(%q<puppet-resource_api>, "~> 1.5")
+  s.add_runtime_dependency(%q<concurrent-ruby>, "~> 1.0")
+  s.add_runtime_dependency(%q<deep_merge>, "~> 1.0")
+  s.add_runtime_dependency(%q<scanf>, "~> 1.0")
+
+  platform = s.platform.to_s
+    if platform == 'universal-darwin'
+      s.add_runtime_dependency('CFPropertyList', ['>= 3.0.6', '< 4'])
+    end
+
+    if platform == 'x64-mingw32' || platform == 'x86-mingw32'
+      s.add_runtime_dependency('ffi', '1.15.5')
+      s.add_runtime_dependency('minitar', '~> 0.9')
+    end
+end