Use perl in Git installation for openssl

Author: orgads

ext/tiny_tds/extconf.rb

@@ -151,10 +151,24 @@ def extract_file(file, target)
         end
       end
 
+      def setup_path
+        @prev_path = ENV['PATH']
+        git_perl = 'C:/Program Files/Git/usr/bin'
+        if File.directory?(git_perl)
+          ENV['PATH'] = git_perl + ';' + ENV['PATH']
+          ENV['PERL'] = 'perl'
+        end
+      end
+
+      def restore_path
+        ENV['PATH'] = @prev_path
+      end
+
       def configure
         config = if host=~/mingw/
           host=~/x86_64/ ? 'mingw64' : 'mingw'
         end
+        setup_path
         args = [ "CFLAGS=-DDSO_WIN32",
             "./Configure",
             "no-shared",
@@ -164,6 +178,7 @@ def configure
         args.unshift("CROSS_COMPILE=#{host}-") if enable_config("cross-build")
 
         execute "configure", "sh -c \"#{args.join(" ")}\""
+        restore_path
       end
 
       def dllwrap(dllname, outputlib, deffile, linkto)
@@ -180,6 +195,7 @@ def dllwrap(dllname, outputlib, deffile, linkto)
       end
 
       def compile
+        setup_path
         super
         # OpenSSL DLLs are called "libcrypto32.dll" and "libssl32.dll" per default,
         # regardless to the version. This is best suited to meet the Windows DLL hell.
@@ -189,6 +205,7 @@ def compile
         execute "mkdef-ssl32", "(perl util/mkdef.pl ssl 32 >libssl32.def)"
         dllwrap("libcrypto32-#{version}-#{host}", "libcrypto.dll.a", "libcrypto32.def", "libcrypto.a -lws2_32 -lgdi32 -lcrypt32")
         dllwrap("libssl32-#{version}-#{host}", "libssl.dll.a", "libssl32.def", "libssl.a libcrypto.dll.a")
+        restore_path
       end
 
       def install