Introducing Unit version check in Go package.

To communicate with the Go program, Unit setup environment variable
named NXT_GO_PORTS with value contains Unit version, stream id to confirm
application is started, and Unit ports information.  Go Unit package parses
this string and compares runtime version with compile time version.  In case
of parse error or version mismatch, ListenAndServe() returns with the error.

1 files changed, 10 insertions, 10 deletions

diff --git a/src/go/unit/nxt_go_lib.c b/src/go/unit/nxt_go_lib.c
index 84d64c0e..4c6b9ac2 100644
--- a/src/go/unit/nxt_go_lib.c
+++ b/src/go/unit/nxt_go_lib.c
@@ -112,18 +112,11 @@ nxt_go_request_done(nxt_go_request_t r)
 
 
 void
-nxt_go_ready()
+nxt_go_ready(uint32_t stream)
 {
-    char           *go_stream;
-    nxt_port_msg_t port_msg;
+    nxt_port_msg_t  port_msg;
 
-    go_stream = getenv("NXT_GO_STREAM");
-
-    if (go_stream == NULL) {
-        return;
-    }
-
-    port_msg.stream = atol(go_stream);
+    port_msg.stream = stream;
     port_msg.pid = getpid();
     port_msg.reply_port = 0;
     port_msg.type = _NXT_PORT_MSG_PROCESS_READY;
@@ -141,3 +134,10 @@ nxt_go_process_port_msg(uintptr_t buf, size_t buf_len, uintptr_t oob, size_t oob
 {
     return nxt_go_port_on_read((void *) buf, buf_len, (void *) oob, oob_len);
 }
+
+
+const char *
+nxt_go_version()
+{
+    return NXT_VERSION;
+}