A Go (golang) implementation of libcap: import "libcap/cap".

The API for this "libcap/cap" package is very similar to libcap.
I've included a substantial interoperability test that validate
libcap(c) and libcap/cap(go) have import/export text and binary
format compatibility.

My motivation for implementing a standalone Go package was for a
cross-compilation issue I ran into (Go is much more friendly for
cross-compilation by default, unless you need to use cgo).

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/go/Makefile b/go/Makefile
new file mode 100644
index 0000000..059e0c1
--- /dev/null
+++ b/go/Makefile
@@ -0,0 +1,38 @@
+# Building the libcap/cap Go package. Note, we use symlinks to
+# construct a go friendly src tree.
+
+topdir=$(realpath ..)
+include ../Make.Rules
+
+all:
+	$(MAKE) compare-cap
+	./compare-cap
+
+src/libcap/cap:
+	mkdir -p src/libcap
+	ln -s $(realpath ..)/cap src/libcap/
+
+install: all
+# TODO - install the Go package somewhere useful (ex. /usr/share/gocode/src/libcap/cap/ )
+
+../libcap/cap_names.h:
+	make -C ../libcap
+
+src/libcap/cap/names.go: ../libcap/cap_names.h src/libcap/cap  mknames.go
+	go run mknames.go --header=$< | gofmt > $@ || rm -f $@
+
+GOPACKAGE=pkg/$(GOOSARCH)/libcap/cap.a
+$(GOPACKAGE): src/libcap/cap/names.go src/libcap/cap/cap.go src/libcap/cap/text.go
+	echo testing Go package
+	GOPATH=$(realpath .) go test libcap/cap
+	echo building $(GOPACKAGE)
+	mkdir -p pkg
+
+# Compile and run something with this package and compare it to libcap.
+compare-cap: compare-cap.go $(GOPACKAGE)
+	GOPATH=$(realpath .) go build $<
+
+clean:
+	GOPATH=$(realpath .) go clean -x -i libcap/cap || exit 0
+	rm -f *.o *.so mknames compare-cap *~ ../cap/*~ ../cap/names.go
+	rm -fr pkg src