How can a function establish the following details from the runtime so that it can craft appropriate error reporting as part of a error library to be used using in many products (we are changing over to golang):
I would like to be able to retrieve both of these to augment the various file revision numbers that I can report along with some stack trace information
Useful related but off-topic information:
- You can get stack traces out of the runtime as illustrated here http://technosophos.com/2014/03/19/generating-stack-traces-in-go.html
- The reflect package http://golang.org/pkg/reflect/ can be used to examine an identified function
Thank you for your assistance,
Richard
You can use the -X linker flag to set the value of a string variable when building:
go build -ldflags "-X main.Uname '$(uname -a)' -X main.CompileTime '$(date)'"
With such command, this code
package main
import "fmt"
// Set by the linker.
var CompileTime, Uname string
func main() {
fmt.Println(Uname)
fmt.Println(CompileTime)
}
will print something like
Linux user 3.13.0-53 Wed May 20 10:34:39 UTC 2015 x86_64 GNU/Linux
Wed May 27 12:00:00 UTC 2015
See the linker docs for more info.