README.md: how to install image-tools

Signed-off-by: Sn0rt <wanggh-fnst@cn.fujitsu.com>

Makefile

@@ -8,13 +8,18 @@ TOOLS := \
 	oci-create-runtime-bundle \
 	oci-image-validate \
 	oci-unpack
+MAN := \
+	oci-create-runtime-bundle.1 \
+	oci-image-validate.1 \
+	oci-unpack.1
 
 default: help
 
 help:
 	@echo "Usage: make <target>"
 	@echo
 	@echo " * 'tools' - Build the oci image tools binaries"
+	@echo " * 'install' - Install binary"
 	@echo " * 'check-license' - Check license headers in source files"
 	@echo " * 'lint' - Execute the source code linter"
 	@echo " * 'test' - Execute the unit tests"
@@ -29,6 +34,21 @@ tools: $(TOOLS)
 $(TOOLS): oci-%:
 	go build -ldflags "-X main.gitCommit=${COMMIT}" ./cmd/$@
 
+.PHONY: man install uninstall
+
+_man:
+	go-md2man -in "cmd/oci-unpack/oci-unpack.1.md" -out "oci-unpack.1"
+	go-md2man -in "cmd/oci-image-validate/oci-image-validate.1.md" -out "oci-image-validate.1"
+	go-md2man -in	"cmd/oci-create-runtime-bundle/oci-create-runtime-bundle.1.md" -out "oci-create-runtime-bundle.1"
+
+install: _man
+	install -m 755 $(TOOLS) /usr/local/bin/
+	install -m 644 $(MAN) /usr/local/share/man/man1
+
+uninstall: clean
+	rm -f /usr/local/share/man/man1/oci-create-runtime-bundle.1 /usr/local/share/man/man1/oci-image-validate.1 /usr/local/share/man/man1/oci-unpack.1
+	rm -f /usr/local/bin/oci-create-runtime-bundle /usr/local/bin/oci-image-validate /usr/local/bin/oci-unpack
+
 lint:
 	@echo "checking lint"
 	@./.tool/lint
@@ -73,7 +93,7 @@ install.tools: .install.gitvalidation .install.glide .install.glide-vc .install.
 	gometalinter --install --update
 
 clean:
-	rm -rf *~ $(OUTPUT_DIRNAME) $(TOOLS)
+	rm -rf *~ $(OUTPUT_DIRNAME) $(TOOLS) $(MAN)
 
 .PHONY: \
 	tools \

README.md

@@ -2,6 +2,15 @@
 
 `image-tools` is a collection of tools for working with the [OCI image format specification](https://github.com/opencontainers/image-spec).
 
+# Building
+
+```
+$ go get github.com/opencontainers/image-tools/
+$ cd $GOPATH/src/github.com/opencontainers/image-tools/
+$ make tools
+$ sudo make install
+```
+
 # Contributing
 
 Development happens on GitHub. Issues are used for bugs and actionable items and longer discussions can happen on the [mailing list](#mailing-list).