From b7564637cae8d515bffc6d0639266ebf9af48a49 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Thu, 5 Apr 2018 16:28:34 -0400
Subject: [PATCH] add main cxl.rb, Cxl::VERSION, and initial CLI processing

---
 bin/cxlc                       |  2 +-
 lib/cxl/cxl/lib/cxl.rb         |  2 ++
 lib/cxl/cxl/lib/cxl/cli.rb     | 25 ++++++++++++++++++++++++-
 lib/cxl/cxl/lib/cxl/version.rb |  3 +++
 4 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 lib/cxl/cxl/lib/cxl.rb
 create mode 100644 lib/cxl/cxl/lib/cxl/version.rb

diff --git a/bin/cxlc b/bin/cxlc
index c4855d2..b7e78e0 100755
--- a/bin/cxlc
+++ b/bin/cxlc
@@ -5,6 +5,6 @@ $LOAD_PATH << "#{lib_dir}/cxl/lib"
 $LOAD_PATH << "#{lib_dir}/yawpa/lib"
 $LOAD_PATH << "#{lib_dir}/whittle/lib"
 
-require "cxl/cli"
+require "cxl"
 
 exit(Cxl::Cli.run(ARGV.dup))
diff --git a/lib/cxl/cxl/lib/cxl.rb b/lib/cxl/cxl/lib/cxl.rb
new file mode 100644
index 0000000..8eee01b
--- /dev/null
+++ b/lib/cxl/cxl/lib/cxl.rb
@@ -0,0 +1,2 @@
+require "cxl/cli"
+require "cxl/version"
diff --git a/lib/cxl/cxl/lib/cxl/cli.rb b/lib/cxl/cxl/lib/cxl/cli.rb
index 6178398..bb0b2c2 100644
--- a/lib/cxl/cxl/lib/cxl/cli.rb
+++ b/lib/cxl/cxl/lib/cxl/cli.rb
@@ -2,10 +2,33 @@ module Cxl
   class Cli
     class << self
 
+      HELP_TEXT = <<EOF
+Usage: clxc [options] <input-files...> -- <C-compiler-flags>
+  Options:
+    --version     show version and exit
+    --help, -h    show this help and exit
+    -c            compile only (no link)
+    -o OUTPUT     send output to file OUTPUT
+EOF
+
       def run(params)
         require "yawpa"
 
-        puts "Coming soon..."
+        options = {
+          version: {},
+          help: {short: "h"},
+          compile_only: {short: "c"},
+          output: {short: "o", nargs: 1},
+        }
+        opts, args = Yawpa.parse(params, options, posix_order: true)
+        if opts[:version]
+          puts "clxc, version #{Cxl::VERSION}"
+          return 0
+        end
+        if opts[:help]
+          puts HELP_TEXT
+          return 0
+        end
 
         0
       end
diff --git a/lib/cxl/cxl/lib/cxl/version.rb b/lib/cxl/cxl/lib/cxl/version.rb
new file mode 100644
index 0000000..ef75359
--- /dev/null
+++ b/lib/cxl/cxl/lib/cxl/version.rb
@@ -0,0 +1,3 @@
+module Cxl
+  VERSION = "0.0.1"
+end