From b52d38f648b9cf1a8b99095fa777d4c1a1c686a7 Mon Sep 17 00:00:00 2001
From: Nathan Braswell <miloignis@gmail.com>
Date: Wed, 27 Apr 2016 15:59:28 -0400
Subject: [PATCH] Added in version numbers/hashes pulled from git - captain.sh
 generates at build time compiler_version.krak to be imported by kraken.main

---
 .gitignore  |  1 +
 captain.sh  |  5 +++++
 kraken.krak | 12 ++++++++----
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/.gitignore b/.gitignore
index 9bbbe0b..5f63ff6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,4 @@ kraken_bac
 kraken_deprecated
 bootstrap_kalypso
 kraken_bootstrap
+compiler_version.krak
diff --git a/captain.sh b/captain.sh
index bf8bfc4..d297fa8 100755
--- a/captain.sh
+++ b/captain.sh
@@ -3,6 +3,10 @@
 kraken="kraken"
 bootstrap_commits=(cf46fb13afe66ba475db9725e9269c9c1cd3bbc3 2cd43e5a217318c70097334b3598d2924f64b362)
 
+# Echo version string to a file included by kraken.krak
+# There is a default version string in the file in case kraken is not built with captain
+echo "var version_string = \"Self-hosted Kraken compiler \\\"Kalypso\\\" - revision $(git rev-list HEAD | wc -l), commit: $(git rev-parse HEAD)\";" > compiler_version.krak
+
 if [[ $1 == "clean" ]]
 then
     rm ${kraken}
@@ -73,6 +77,7 @@ else
                         echo "commit hash: ${bootstrap_commits[$i]}"
                         mv ./krakenGrammer.kgm krakenGrammer.kgm_old
                         git checkout ${bootstrap_commits[$i]}
+                        echo "var version_string = \"Self-hosted Kraken compiler \\\"Kalypso\\\" - revision $(git rev-list HEAD | wc -l), commit: $(git rev-parse HEAD)\";" > compiler_version.krak
                         mv ./krakenGrammer.kgm krakenGrammer.kgm_new
                         mv ./krakenGrammer.kgm_old krakenGrammer.kgm
                         ./${kraken}_bootstrap kraken.krak ${kraken}_bootstrap
diff --git a/kraken.krak b/kraken.krak
index 2158a7a..500a28a 100644
--- a/kraken.krak
+++ b/kraken.krak
@@ -9,9 +9,16 @@ import tree:*
 import serialize:*
 import c_generator:*
 import os:*
+import compiler_version
+
 
 fun main(argc: int, argv: **char):int {
-
+    if (argc <= 1) {
+        error("No input file!\n Call with one argument (the input file), or two arguments (input file and output name)")
+    } else if (string(argv[1]) == "-v" || string(argv[1]) == "--version") {
+        println(compiler_version::version_string)
+        exit(0)
+    }
     /*var gram.construct(): grammer*/
     // delay construction until we either load it or copy construct it
     var gram: grammer
@@ -61,9 +68,6 @@ fun main(argc: int, argv: **char):int {
         println("done writing")
     }
 
-    if (argc <= 1) {
-        error("No input file!\n Call with one argument (the input file), or two arguments (input file and output name)")
-    }
     var kraken_file_name = string(argv[1])
     var parse.construct(gram): parser
     var ast_pass.construct(): ast_transformation