ruby: add CEL example

.ruby-version

@@ -1 +1 @@
-jruby-9.4.8.0
+jruby-9.4.7.0

Gemfile

@@ -2,10 +2,12 @@
 
 source 'https://rubygems.org'
 
+gem 'cel', '~> 0.2.3'
 gem 'erb', '~> 4.0'
+gem 'google-protobuf', '~> 4.27'
 gem 'haml', '~> 5.2'
-gem 'rspec-its'
 gem 'rspec', '~> 3.13.0'
+gem 'rspec-its'
 gem 'slim', '~> 5.0'
 
 gem 'rubocop', require: false

Gemfile.lock

@@ -2,13 +2,34 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    bigdecimal (3.1.8)
+    bigdecimal (3.1.8-java)
+    cel (0.2.3)
     cgi (0.3.6)
     cgi (0.3.6-java)
     diff-lcs (1.5.1)
     erb (4.0.4)
       cgi (>= 0.3.3)
     erb (4.0.4-java)
       cgi (>= 0.3.3)
+    ffi (1.17.0-java)
+    ffi-compiler (1.3.2)
+      ffi (>= 1.15.5)
+      rake
+    google-protobuf (4.27.2-arm64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.27.2-java)
+      bigdecimal
+      ffi (~> 1)
+      ffi-compiler (~> 1)
+      rake (>= 13)
+    google-protobuf (4.27.2-x86_64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.27.2-x86_64-linux)
+      bigdecimal
+      rake (>= 13)
     haml (5.2.2)
       temple (>= 0.8.0)
       tilt
@@ -22,6 +43,7 @@ GEM
     racc (1.8.0)
     racc (1.8.0-java)
     rainbow (3.1.1)
+    rake (13.2.1)
     regexp_parser (2.9.2)
     rexml (3.3.1)
       strscan
@@ -76,7 +98,9 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  cel (~> 0.2.3)
   erb (~> 4.0)
+  google-protobuf (~> 4.27)
   haml (~> 5.2)
   rspec (~> 3.13.0)
   rspec-its
@@ -85,4 +109,4 @@ DEPENDENCIES
   slim (~> 5.0)
 
 BUNDLED WITH
-   2.5.3
+   2.5.15

MODULE.bazel

@@ -44,11 +44,20 @@ ruby.bundle_fetch(
     name = "bundle",
     gem_checksums = {
         "ast-2.4.2": "1e280232e6a33754cde542bc5ef85520b74db2aac73ec14acef453784447cc12",
+        "bigdecimal-3.1.8": "a89467ed5a44f8ae01824af49cbc575871fa078332e8f77ea425725c1ffe27be",
+        "bigdecimal-3.1.8-java": "b9e94c14623fff8575f17a10320852219bbba92ecff4977571503d942687326e",
+        "cel-0.2.3": "eacd66662224b688fa9d4a169d9c8ed292edfb487b040dd6a2ab34f246abaa77",
         "cgi-0.3.6": "c5e2c301437116b28fdfbb565452b9c1ee597901e68611367b4126b5d10feca3",
         "cgi-0.3.6-java": "f94886a613c101f2f60c2e33ea8a42d6ad0b9a5fcda3d550e01f35b0271585af",
         "diff-lcs-1.5.1": "273223dfb40685548436d32b4733aa67351769c7dea621da7d9dd4813e63ddfe",
         "erb-4.0.4": "de116e106205c46bc01918789b611aaad1328dcc6e9f12cf8cd2cc60ef619717",
         "erb-4.0.4-java": "3767088f230194a84316a5879f0c3dc5f2a96fb1c9a198c3e27d3f35d416c597",
+        "ffi-1.17.0-java": "f65f022616970fcde83fe176393eb873a7b959ef2703f94931cf0af6ab55ec7a",
+        "ffi-compiler-1.3.2": "a94f3d81d12caf5c5d4ecf13980a70d0aeaa72268f3b9cc13358bcc6509184a0",
+        "google-protobuf-4.27.2-arm64-darwin": "36cbd6620ef822f8a93870cc837212b302cbbdd7c900f8fa6701c735b7ff7f97",
+        "google-protobuf-4.27.2-java": "e70eda54bf6bcd659c4e685c91cb7f00b7f4b3675467eca085a8409c8f4dfe53",
+        "google-protobuf-4.27.2-x86_64-darwin": "689f921050489d3cc2537c48bee98047414ad099bb980538562955a3bc9fdced",
+        "google-protobuf-4.27.2-x86_64-linux": "126183186de79f709a0792f31eddf1fcebbfb5ded29538d184ece8fae73148c2",
         "haml-5.2.2": "6e759246556145642ef832d670fc06f9bd8539159a0e600847a00291dd7aae0c",
         "json-2.7.2": "1898b5cbc81cd36c0fd4d0b7ad2682c39fb07c5ff682fc6265f678f550d4982c",
         "json-2.7.2-java": "138e3038b5361b3d06ee2e8aa2be00bed0d0de4ef5f1553fc5935e5b93aca7ee",
@@ -58,6 +67,7 @@ ruby.bundle_fetch(
         "racc-1.8.0": "09349a65c37c4fe710a435f25c9f1652e39f29ad6b1fa08d4a8d30c0553d3a08",
         "racc-1.8.0-java": "3688448632150682bbd708b199961129aed2266107e26fcacb45c997395c19f9",
         "rainbow-3.1.1": "039491aa3a89f42efa1d6dec2fc4e62ede96eb6acd95e52f1ad581182b79bc6a",
+        "rake-13.2.1": "46cb38dae65d7d74b6020a4ac9d48afed8eb8149c040eccf0523bec91907059d",
         "regexp_parser-2.9.2": "5a27e767ad634f8a4b544520d5cd28a0db7aa1198a5d7c9d7e11d7b3d9066446",
         "rexml-3.3.1": "34af9fb38eff6c451abd187c53fded98378aa91766d4c62fbbce10e40ed7c325",
         "rspec-3.13.0": "d490914ac1d5a5a64a0e1400c1d54ddd2a501324d703b8cfe83f458337bab993",

src/ruby/cel/BUILD.bazel

@@ -0,0 +1,10 @@
+load("@rules_ruby//ruby:defs.bzl", "rb_binary", "rb_test")
+
+rb_binary(
+    name = "cel",
+    srcs = ["cel.rb"],
+    main = "cel.rb",
+    deps = [
+        "@bundle",
+    ],
+)

src/ruby/cel/cel.rb

@@ -0,0 +1,19 @@
+require "cel"
+
+env = Cel::Environment.new(name: :string, group: :string)
+
+begin
+  ast = env.compile('name.startsWith("/groups/" + group)') #=> Cel::Types[:bool], which is == :bool
+rescue Cel::Error => e
+  STDERR.puts("type-check error: #{e.message}")
+  raise e
+end
+
+prg = env.program(ast)
+
+return_value = prg.evaluate(
+  name: Cel::String.new("/groups/acme.co/documents/secret-stuff"),
+  group: Cel::String.new("acme.co"),
+)
+
+puts return_value #=> true