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# Go build information utilities
These are some small build information utilities I wrote for tracking Go binary
version information. Rather than trying to assign a linear version number to a
binary, the tag names and version control commit hashes of all dependencies are
tracked. This information is then burnt into the binary at build time.
You use the shell script `gen`, included, to generate the version information
blob. It outputs arguments suitable for `go build`, so you can use it like `go
build ./... -ldflags "$($GOPATH/src/github.com/hlandau/buildinfo/gen ./...)"`.
## For upstream packagers
OS upstream packagers which want to specify their own information may do so:
simply set the `github.com/hlandau/buildinfo.RawBuildInfo` string variable at
build time, by passing `-ldflags -X
github.com/hlandau/buildinfo.RawBuildInfo=BUILDINFO...` to `go build`. This
expects base64-encoded data in a particular format.
If you want to specify an arbitrary freeform string instead, set `BuildInfo`
instead of `RawBuildInfo`. The string you specify will be used verbatim without
modification.
Example:
```
go install -ldflags '-X github.com/hlandau/buildinfo.BuildInfo="Packaged by Distro X"' \
github.com/my/project
```
### Previous location
This package was previously located at
`github.com/hlandau/degoutils/buildinfo`. Packagers setting
`github.com/hlandau/degoutils/buildinfo.BuildInfo` will need to change to
`github.com/hlandau/buildinfo.BuildInfo`.
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