From cb0623f25db7f06660e563e8e746bfe0ae5ba9c5 Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Fri, 8 Feb 2013 18:50:07 +0000
Subject: [PATCH] auto-generate Unicorn::Const::UNICORN_VERSION

This DRYs out our code and prevents snafus like the 4.6.0
release where UNICORN_VERSION stayed at 4.5.0

Reported-by: Maurizio De Santis <m.desantis@morganspa.com>
---
 .gitignore           |  1 +
 GIT-VERSION-GEN      | 79 ++++++++++++++++++++++++++--------------------------
 GNUmakefile          |  2 +-
 lib/unicorn/const.rb |  4 +--
 4 files changed, 42 insertions(+), 44 deletions(-)
 rewrite GIT-VERSION-GEN (84%)

diff --git a/.gitignore b/.gitignore
index 50c2736c..19a82d62 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,4 @@ pkg/
 /man
 /tmp
 /LATEST
+/lib/unicorn/version.rb
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
dissimilarity index 84%
index 56aef5f2..e5d414ac 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,40 +1,39 @@
-#!/bin/sh
-
-GVF=GIT-VERSION-FILE
-DEF_VER=v4.6.0
-
-LF='
-'
-
-# First see if there is a version file (included in release tarballs),
-# then try git-describe, then default.
-if test -f version
-then
-	VN=$(cat version) || VN="$DEF_VER"
-elif test -d .git -o -f .git &&
-	VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
-	case "$VN" in
-	*$LF*) (exit 1) ;;
-	v[0-9]*)
-		git update-index -q --refresh
-		test -z "$(git diff-index --name-only HEAD --)" ||
-		VN="$VN-dirty" ;;
-	esac
-then
-	VN=$(echo "$VN" | sed -e 's/-/./g');
-else
-	VN="$DEF_VER"
-fi
-
-VN=$(expr "$VN" : v*'\(.*\)')
-
-if test -r $GVF
-then
-	VC=$(sed -e 's/^GIT_VERSION = //' <$GVF)
-else
-	VC=unset
-fi
-test "$VN" = "$VC" || {
-	echo >&2 "GIT_VERSION = $VN"
-	echo "GIT_VERSION = $VN" >$GVF
-}
+#!/usr/bin/env ruby
+DEF_VER = "v4.6.0"
+CONSTANT = "Unicorn::Const::UNICORN_VERSION"
+RVF = "lib/unicorn/version.rb"
+GVF = "GIT-VERSION-FILE"
+vn = DEF_VER
+
+# First see if there is a version file (included in release tarballs),
+# then try git-describe, then default.
+if File.exist?(".git")
+  describe = `git describe --abbrev=4 HEAD 2>/dev/null`.strip
+  case describe
+  when /\Av[0-9]*/
+    vn = describe
+    system(*%w(git update-index -q --refresh))
+    unless `git diff-index --name-only HEAD --`.chomp.empty?
+      vn << "-dirty"
+    end
+    vn.tr!('-', '.')
+  end
+end
+
+vn = vn.sub!(/\Av/, "")
+
+# generate the Ruby constant
+new_ruby_version = "#{CONSTANT} = '#{vn}'\n"
+cur_ruby_version = File.read(RVF) rescue nil
+if new_ruby_version != cur_ruby_version
+  File.open(RVF, "w") { |fp| fp.write(new_ruby_version) }
+end
+
+# generate the makefile snippet
+new_make_version = "GIT_VERSION = #{vn}\n"
+cur_make_version = File.read(GVF) rescue nil
+if new_make_version != cur_make_version
+  File.open(GVF, "w") { |fp| fp.write(new_make_version) }
+end
+
+puts vn if $0 == __FILE__
diff --git a/GNUmakefile b/GNUmakefile
index ea134861..34a2d951 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -155,7 +155,7 @@ clean:
 man html:
 	$(MAKE) -C Documentation install-$@
 
-pkg_extra := GIT-VERSION-FILE ChangeLog LATEST NEWS \
+pkg_extra := GIT-VERSION-FILE lib/unicorn/version.rb ChangeLog LATEST NEWS \
              $(ext)/unicorn_http.c $(man1_paths)
 
 ChangeLog: GIT-VERSION-FILE .wrongdoc.yml
diff --git a/lib/unicorn/const.rb b/lib/unicorn/const.rb
index fcc30c06..51d73946 100644
--- a/lib/unicorn/const.rb
+++ b/lib/unicorn/const.rb
@@ -7,9 +7,6 @@
 # improvement over using the strings directly.  Symbols did not really
 # improve things much compared to constants.
 module Unicorn::Const
-
-  UNICORN_VERSION = "4.5.0"
-
   # default TCP listen host address (0.0.0.0, all interfaces)
   DEFAULT_HOST = "0.0.0.0"
 
@@ -44,3 +41,4 @@ module Unicorn::Const
 
   # :startdoc:
 end
+require 'unicorn/version'
-- 
2.11.4.GIT