Add a "show-go-depends" target, similar to cargo.mk.

[Benny Siegert <bsiegert%gmail.com@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Benny Siegert <bsiegert%gmail.com@localhost>
Pushed By:	bsiegert
Date:		Sun May 19 21:18:51 2019 -0400
Changeset:	a257497491e4132e964aab8c9df5664027f02ed6

Modified Files:
	go/go-package.mk

Log Message:
Add a "show-go-depends" target, similar to cargo.mk.

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=a257497491e4132e964aab8c9df5664027f02ed6

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 go/go-package.mk | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diffs:
diff --git a/go/go-package.mk b/go/go-package.mk
index 9156133e05..31f9ba8206 100644
--- a/go/go-package.mk
+++ b/go/go-package.mk
@@ -75,7 +75,7 @@ PRINT_PLIST_AWK+=	/^@pkgdir bin$$/ { next; }
 PRINT_PLIST_AWK+=	/^@pkgdir gopkg$$/ { next; }
 
 .if !empty(${GO_MODULE:M[Yy][Ee][Ss]})
-MAKE_ENV+=	GO111MODULE=on GOPROXY=file://${WRKDIR}/.proxy
+MAKE_ENV+=	GO111MODULE=on GOPATH=${WRKDIR}/.gopath GOPROXY=file://${WRKDIR}/.gopath/pkg/mod/
 .else
 MAKE_ENV+=	GO111MODULE=off GOPATH=${WRKDIR}:${BUILDLINK_DIR}/gopkg 
 .endif
@@ -104,6 +104,13 @@ do-install:
 	${RUN} cd ${WRKDIR}; [ ! -d pkg ] || ${PAX} -rw src pkg ${DESTDIR}${PREFIX}/gopkg
 .endif
 
+.if !empty(${GO_MODULE:M[Yy][Ee][Ss]})
+.PHONY: show-go-modules
+show-go-modules:
+	cd ${WRKSRC} && ${RUN} ${PKGSRC_SETENV} ${MAKE_ENV} ${GO} get -d
+	cd ${WRKDIR}/.gopath/pkg/mod && ${RUN} ${FIND} . | ${SED} -e 's/\.\//GO_MODULE_FILES+=	/'
+.endif
+
 _VARGROUPS+=		go
 _PKG_VARS.go=		GO_SRCPATH GO_DIST_BASE GO_BUILD_PATTERN
 _USER_VARS.go=		GO_VERSION_DEFAULT