Get environment variables as a map in golang
Here is a code to get the environment variables as a map in go instead of slice.
package main
import (
"fmt"
"os"
"strings"
)
func main() {
getenvironment := func(data []string, getkeyval func(item string) (key, val string)) map[string]string {
items := make(map[string]string)
for _, item := range data {
key, val := getkeyval(item)
items[key] = val
}
return items
}
environment := getenvironment(os.Environ(), func(item string) (key, val string) {
splits := strings.Split(item, "=")
key = splits[0]
val = splits[1]
return
})
fmt.Println(environment["KEY"])
}I needed this because I was looking for a specific environment variable.
Written by Naveen
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4 Responses
Thanks for this, it was helpful. There's a subtle bug here which is that values that contain an = sign are not properly handled. You need to change the getkeyval function to:
splits := strings.Split(item, "=")
key = splits[0]
val = strings.Join(splits[1:], "=")
returnWithout this fix an environment variable created with export VALUE=some=value will end up as some in the resulting map.
I needed this because I was looking for a specific environment variable.
To get the value of an environment variable, you can use os.Getenv:
val := os.Getenv("key")
@jkakar No, you should use strings.SplitN instead of Split. http://play.golang.org/p/myVS4NUwau
@jkakar No, you should use strings.SplitN instead of Split. http://play.golang.org/p/myVS4NUwau
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