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