golang: Fix bindings for golang 1.16.

See https://blog.golang.org/go116-module-changes

.gitignore

@@ -211,10 +211,9 @@ Makefile.in
 /gobject/guestfs-gobject.3
 /gobject/libguestfs-gobject-1.0.vapi
 /gobject/stamp-guestfs-gobject.pod
-/golang/bindtests.go
+/golang/bindtests/bindtests.go
 /golang/examples/guestfs-golang.3
 /golang/examples/stamp-guestfs-golang.pod
-/golang/pkg
 /haskell/Bindtests
 /haskell/Bindtests.hs
 /haskell/Guestfs010Load

generator/main.ml

@@ -301,7 +301,7 @@ Run it from the top source directory using the command
 
   output_to "golang/src/libguestfs.org/guestfs/guestfs.go"
             Golang.generate_golang_go;
-  output_to "golang/bindtests.go"
+  output_to "golang/bindtests/bindtests.go"
             Bindtests.generate_golang_bindtests;
 
   output_to "gobject/bindtests.js"

golang/Makefile.am

@@ -26,27 +26,20 @@ source_files = \
 
 generator_built = \
 	$(source_files) \
-	bindtests.go
+	bindtests/bindtests.go
 
 EXTRA_DIST = \
 	src/libguestfs.org/guestfs/.gitignore \
 	$(generator_built) \
+	bindtests/go.mod \
 	config-test.go \
 	run-bindtests \
 	run-tests
 
 if HAVE_GOLANG
 
-golangpkgdir = $(GOROOT)/pkg/$(GOOS)_$(GOARCH)/$(pkg)
-golangsrcdir = $(GOROOT)/src/pkg/$(pkg)
-
-golangpkg_DATA = \
-	pkg/$(GOOS)_$(GOARCH)/$(pkg).a
-
-pkg/$(GOOS)_$(GOARCH)/$(pkg).a: src/$(pkg)/guestfs.go
-	$(top_builddir)/run $(GOLANG) install $(pkg)
-
-golangsrc_DATA = $(source_files)
+all-local: $(source_files)
+	cd src/$(pkg) && $(GOLANG) build
 
 TESTS_ENVIRONMENT = pkg=$(pkg) $(top_builddir)/run $(VG) # --test
 
@@ -55,6 +48,3 @@ TESTS = run-bindtests run-tests
 endif
 
 CLEANFILES += src/$(pkg)/*~
-
-clean-local:
-	rm -rf pkg

golang/bindtests/go.mod

@@ -0,0 +1,4 @@
+module main
+
+replace libguestfs.org/guestfs => ../src/libguestfs.org/guestfs
+require libguestfs.org/guestfs v1.0.0

golang/examples/Makefile.am

@@ -19,8 +19,10 @@ include $(top_srcdir)/subdir-rules.mk
 
 EXTRA_DIST = \
 	LICENSE \
-	create-disk.go \
-	inspect-vm.go \
+	create-disk/go.mod \
+	create-disk/create-disk.go \
+	inspect-vm/go.mod \
+	inspect-vm/inspect-vm.go \
 	guestfs-golang.pod
 
 man_MANS = guestfs-golang.3
@@ -28,13 +30,14 @@ noinst_DATA = $(top_builddir)/website/guestfs-golang.3.html
 
 guestfs-golang.3 $(top_builddir)/website/guestfs-golang.3.html: stamp-guestfs-golang.pod
 
-stamp-guestfs-golang.pod: guestfs-golang.pod create-disk.go inspect-vm.go
+stamp-guestfs-golang.pod: guestfs-golang.pod \
+		create-disk/create-disk.go inspect-vm/inspect-vm.go
 	$(PODWRAPPER) \
 	  --section 3 \
 	  --man guestfs-golang.3 \
 	  --html $(top_builddir)/website/guestfs-golang.3.html \
-	  --verbatim $(srcdir)/create-disk.go:@EXAMPLE1@ \
-	  --verbatim $(srcdir)/inspect-vm.go:@EXAMPLE2@ \
+	  --verbatim $(srcdir)/create-disk/create-disk.go:@EXAMPLE1@ \
+	  --verbatim $(srcdir)/inspect-vm/inspect-vm.go:@EXAMPLE2@ \
 	  --license examples \
 	  $<
 	touch $@

golang/examples/create-disk/go.mod

@@ -0,0 +1,4 @@
+module main
+
+replace libguestfs.org/guestfs => ../../src/libguestfs.org/guestfs
+require libguestfs.org/guestfs v1.0.0

golang/examples/inspect-vm/go.mod

@@ -0,0 +1,4 @@
+module main
+
+replace libguestfs.org/guestfs => ../../src/libguestfs.org/guestfs
+require libguestfs.org/guestfs v1.0.0

golang/run-bindtests

@@ -18,6 +18,7 @@
 
 set -e
 
-$GOLANG run $srcdir/bindtests.go > bindtests.tmp
-diff -u $srcdir/../bindtests bindtests.tmp
+cd $srcdir/bindtests
+$GOLANG run bindtests.go > bindtests.tmp
+diff -u $srcdir/../../bindtests bindtests.tmp
 rm bindtests.tmp

golang/run-tests

@@ -18,4 +18,6 @@
 
 set -e
 
-$GOLANG test $pkg
+cd src/$pkg
+
+$GOLANG test

golang/src/libguestfs.org/guestfs/go.mod

@@ -0,0 +1,4 @@
+module libguestfs.org/guestfs
+
+// First version of golang with working module support.
+go 1.13

m4/guestfs-golang.m4

@@ -26,14 +26,6 @@ AS_IF([test "x$enable_golang" != "xno"],[
         AC_MSG_CHECKING([if $GOLANG is usable])
         AS_IF([$GOLANG run $srcdir/golang/config-test.go 2>&AS_MESSAGE_LOG_FD],[
             AC_MSG_RESULT([yes])
-
-            # Substitute some golang environment.
-            GOOS=`$GOLANG env GOOS`
-            GOARCH=`$GOLANG env GOARCH`
-            GOROOT=`$GOLANG env GOROOT`
-            AC_SUBST([GOOS])
-            AC_SUBST([GOARCH])
-            AC_SUBST([GOROOT])
         ],[
             AC_MSG_RESULT([no])
             AC_MSG_WARN([golang ($GOLANG) is installed but not usable])

run.in

@@ -178,8 +178,6 @@ export LUA_CPATH
 
 # For golang.
 export GOLANG="@GOLANG@"
-prepend GOPATH "$b/golang"
-export GOPATH
 if [ -z "$CGO_CFLAGS" ]; then
     CGO_CFLAGS="-I$s/include"
 else