Set all version flags at build time so they have correct values

[dvejmz]

Set all version flags at build time so they have correct values. This includes:

• The current (latest git tag)
• The current git commit
• Build date
• Where the build occurred (local build via Makefile or in CI via GoReleaser)

Since some of the information on display is long-winded, I decided to display each version flag in a new line for slightly better readability. If you'd like different wording or formatting using, let me know.

Example:

$ ./revive -version
Version:	v1.1.2-10-ga7e6f59
Commit:		a7e6f596f0f9b0a56dafa977e99630171bb0e84c
Built		2021-10-14 20:33 UTC by Makefile

This closes #560.

[chavacava]

Hi @dvejmz, thanks for the PR!

[invidian]

This PR does not fix #560

$ docker run -it golang:1.17-alpine sh -c 'go install github.com/mgechev/revive@master && revive -version'
go: downloading github.com/mgechev/revive v1.1.3-0.20211015083515-b331445a16a4
go: downloading github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517
go: downloading github.com/fatih/color v1.13.0
go: downloading github.com/mitchellh/go-homedir v1.1.0
go: downloading golang.org/x/tools v0.1.7
go: downloading github.com/BurntSushi/toml v0.4.1
go: downloading github.com/chavacava/garif v0.0.0-20210405164556-e8a0a408d6af
go: downloading github.com/olekukonko/tablewriter v0.0.5
go: downloading github.com/fatih/structtag v1.2.0
go: downloading github.com/mattn/go-isatty v0.0.14
go: downloading github.com/mattn/go-colorable v0.1.9
go: downloading github.com/mattn/go-runewidth v0.0.9
go: downloading golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e
Version:        dev
Commit:         none
Built           unknown by unknown

[dvejmz]

Hi @invidian, I can see why that happened. This PR should ensure the version information is included in the binary when built via the Makefile, either manually or via CI. I didn't account for the go install scenario. I'll take a look at how we can make this work for this use case later today.

[invidian]

Sure. Maybe have a look at flexkube/libflexkube@c9ee296, it can be done this way.

[jefersonf]

The goreleaser tool only sets the ldflags when building the assets. To get the same result using go install it would be necessary to manually set them up. Which doesn't make sense.

As mentioned in #560, we can get some information using the debug.ReadBuildInfo() function, however it is not possible to retrieve the other flags besides the version.