Compile revision info into binary

[hzxuzhonghu]

Task description:

We should compile version,commit hash, and build date into kmesh binary during build. And add version subcommand to allow printing that out.

So it can help developers to know whether they have tested the expected patch.

# kmesh-daemon version
......

This is like kubectl version

Solution:

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[Okabe-Rintarou-0]

Does version here mean kmesh version? How can I get it? Can we pass these parameters(version, commit hash) using environment variables in:

kmesh/Makefile

Lines 80 to 81 in 809e921

	$(QUIET) (export PKG_CONFIG_PATH=$(PKG_CONFIG_PATH):$(ROOT_DIR)mk; \
	$(GO) build -ldflags $(LDFLAGS) -tags $(ENHANCED_KERNEL) -o $(APPS1) $(GOFLAGS) ./daemon/main.go)

[hzxuzhonghu]

Right, we can pass from here.. FYI https://github.com/kurator-dev/kurator/blame/main/Makefile#L16

[Okabe-Rintarou-0]

Right, we can pass from here.. FYI https://github.com/kurator-dev/kurator/blame/main/Makefile#L16

thanks！

[hzxuzhonghu]

Done