Making Go package source distributable and renaming to 'nginx/unit'.

All header files are copied to Go package sources.  As the result,
package can be (re-)build when required.

This closes #23 issue on GitHub.

auto/modules/go

@@ -85,41 +85,37 @@ fi
 
 cat << END >> $NXT_MAKEFILE
 
-.PHONY:		${NXT_GO} ${NXT_GO}-install ${NXT_GO}-uninstall
-
-all: ${NXT_GO}
-
-NXT_ROOT =	`pwd`
+.PHONY: ${NXT_GO}
+.PHONY: ${NXT_GO}-install
+.PHONY: ${NXT_GO}-install-src
+.PHONY: ${NXT_GO}-install-build
+.PHONY: ${NXT_GO}-uninstall
 
 GOPATH =	$NXT_GO_PATH
 GOOS =		`${NXT_GO} env GOOS`
 GOARCH =	`${NXT_GO} env GOARCH`
 
-${NXT_GO}:	$NXT_BUILD_DIR/nxt_go_gen.h
-
-$NXT_BUILD_DIR/nxt_go_gen.h:	src/go/unit/*.go
-	GOPATH=`pwd` \\
-		CGO_CPPFLAGS="-DNXT_CONFIGURE \\
-		-I`pwd`/src" \\
-		${NXT_GO} build -o $NXT_BUILD_DIR/nxt_go_gen.a \\
-		--buildmode=c-archive go/unit
-
+NXT_GO_DST =	${NXT_GO_PATH%%:*}
 
 install: ${NXT_GO}-install
 
-${NXT_GO}-install:	${NXT_GO}
-	install -d \$(DESTDIR)\$(GOPATH)/src/unit
-	install -p -m644 ./src/go/unit/* \$(DESTDIR)\$(GOPATH)/src/unit/
-	CGO_CFLAGS="-I\$(NXT_ROOT)/$NXT_BUILD_DIR -I\$(NXT_ROOT)/src" \\
-		CGO_LDFLAGS="-L\$(NXT_ROOT)/$NXT_BUILD_DIR ${NXT_LIBRT}" \\
-		GOPATH=\$(DESTDIR)\$(GOPATH) \\
-		${NXT_GO} install -v unit
+${NXT_GO}:
+
+${NXT_GO}-install: ${NXT_GO}-install-build
+
+${NXT_GO}-install-src:
+	install -d \$(DESTDIR)\$(NXT_GO_DST)/src/nginx/unit
+	install -p -m644 ./src/*.h ./build/*.h ./src/go/unit/* \
+    \$(DESTDIR)\$(NXT_GO_DST)/src/nginx/unit/
+
+${NXT_GO}-install-build: ${NXT_GO}-install-src
+	GOPATH=\$(DESTDIR)\$(GOPATH) ${NXT_GO} build nginx/unit
 
 
 uninstall: ${NXT_GO}-uninstall
 
 ${NXT_GO}-uninstall:
-	rm -rf \$(DESTDIR)\$(GOPATH)/src/unit
-	rm -f \$(DESTDIR)\$(GOPATH)/pkg/\$(GOOS)_\$(GOARCH)/unit.a
+	rm -rf \$(DESTDIR)\$(NXT_GO_DST)/src/nginx/unit
+	rm -rf \$(DESTDIR)\$(NXT_GO_DST)/pkg/\$(GOOS)_\$(GOARCH)/nginx/unit
 
 END

src/go/unit/darwin-cflags.go

@@ -0,0 +1,13 @@
+// +build darwin
+
+/*
+ * Copyright (C) Max Romanov
+ * Copyright (C) NGINX, Inc.
+ */
+
+package unit
+
+/*
+#cgo CFLAGS: -mmacosx-version-min=10.5
+*/
+import "C"

src/go/unit/linux-lrt.go

@@ -0,0 +1,13 @@
+// +build linux
+
+/*
+ * Copyright (C) Max Romanov
+ * Copyright (C) NGINX, Inc.
+ */
+
+package unit
+
+/*
+#cgo LDFLAGS: -lrt
+*/
+import "C"

src/go/unit/nxt_go_array.c

@@ -4,8 +4,6 @@
  * Copyright (C) NGINX, Inc.
  */
 
-#ifndef NXT_CONFIGURE
-
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -62,5 +60,3 @@ nxt_go_array_add(nxt_array_t *array)
 
     return p;
 }
-
-#endif /* NXT_CONFIGURE */

src/go/unit/nxt_go_lib.c

@@ -4,62 +4,13 @@
  * Copyright (C) NGINX, Inc.
  */
 
-#ifdef NXT_CONFIGURE
-
-#include <stdio.h>
-#include "nxt_go_lib.h"
-
-// Stubs to compile during configure process.
-int
-nxt_go_response_write(nxt_go_request_t r, void *buf, size_t len)
-{
-    return -1;
-}
-
-int
-nxt_go_request_read(nxt_go_request_t r, void *dst, size_t dst_len)
-{
-    return -1;
-}
-
-int
-nxt_go_request_read_from(nxt_go_request_t r, void *dst, size_t dst_len,
-    void *src, size_t src_len)
-{
-    return -1;
-}
-
-int
-nxt_go_request_close(nxt_go_request_t r)
-{
-    return -1;
-}
-
-int
-nxt_go_request_done(nxt_go_request_t r)
-{
-    return -1;
-}
-
-void
-nxt_go_ready()
-{
-}
-
-nxt_go_request_t
-nxt_go_process_port_msg(void *buf, size_t buf_len, void *oob, size_t oob_len)
-{
-    return 0;
-}
-
-#else
-
 #include "nxt_go_run_ctx.h"
 #include "nxt_go_log.h"
 #include "nxt_go_port.h"
 
+#include "_cgo_export.h"
+
 #include <nxt_main.h>
-#include <nxt_go_gen.h>
 
 int
 nxt_go_response_write(nxt_go_request_t r, void *buf, size_t len)
@@ -190,6 +141,3 @@ nxt_go_process_port_msg(void *buf, size_t buf_len, void *oob, size_t oob_len)
 {
     return nxt_go_port_on_read(buf, buf_len, oob, oob_len);
 }
-
-
-#endif /* NXT_CONFIGURE */

src/go/unit/nxt_go_port.c

@@ -4,16 +4,14 @@
  * Copyright (C) NGINX, Inc.
  */
 
-#ifndef NXT_CONFIGURE
-
-
 #include "nxt_go_port.h"
 #include "nxt_go_log.h"
 #include "nxt_go_process.h"
 #include "nxt_go_run_ctx.h"
 
+#include "_cgo_export.h"
+
 #include <nxt_main.h>
-#include <nxt_go_gen.h>
 
 
 #define nxt_go_str(p) ((nxt_go_str_t *)(p))
@@ -205,6 +203,3 @@ fail:
 
     return 0;
 }
-
-
-#endif /* NXT_CONFIGURE */

src/go/unit/nxt_go_port_memory.c

@@ -4,15 +4,13 @@
  * Copyright (C) NGINX, Inc.
  */
 
-#ifndef NXT_CONFIGURE
-
-
 #include "nxt_go_port_memory.h"
 #include "nxt_go_process.h"
 #include "nxt_go_array.h"
 #include "nxt_go_log.h"
 
-#include <nxt_go_gen.h>
+#include "_cgo_export.h"
+
 #include <nxt_main.h>
 
 #if (NXT_HAVE_MEMFD_CREATE)
@@ -197,6 +195,3 @@ unlock_return:
 
     return hdr;
 }
-
-
-#endif /* NXT_CONFIGURE */

src/go/unit/nxt_go_process.c

@@ -4,9 +4,6 @@
  * Copyright (C) NGINX, Inc.
  */
 
-#ifndef NXT_CONFIGURE
-
-
 #include "nxt_go_process.h"
 #include "nxt_go_array.h"
 #include "nxt_go_mutex.h"
@@ -149,6 +146,3 @@ fail:
 
     nxt_go_mutex_unlock(&process->incoming_mutex);
 }
-
-
-#endif /* NXT_CONFIGURE */

src/go/unit/nxt_go_run_ctx.c

@@ -4,9 +4,6 @@
  * Copyright (C) NGINX, Inc.
  */
 
-#ifndef NXT_CONFIGURE
-
-
 #include "nxt_go_run_ctx.h"
 #include "nxt_go_log.h"
 #include "nxt_go_process.h"
@@ -14,9 +11,10 @@
 #include "nxt_go_mutex.h"
 #include "nxt_go_port_memory.h"
 
+#include "_cgo_export.h"
+
 #include <nxt_port_memory_int.h>
 #include <nxt_main.h>
-#include <nxt_go_gen.h>
 
 
 static nxt_int_t
@@ -530,6 +528,3 @@ nxt_go_ctx_read_raw(nxt_go_run_ctx_t *ctx, void *dst, size_t size)
 
     return res;
 }
-
-
-#endif /* NXT_CONFIGURE */