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utils.go
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/
utils.go
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package fangs
import (
"os"
"reflect"
"regexp"
"runtime"
"strings"
)
func contains(parts []string, value string) bool {
for _, v := range parts {
if v == value {
return true
}
}
return false
}
var envVarRegex = regexp.MustCompile("[^a-zA-Z0-9_]")
func envVar(appName string, parts ...string) string {
v := strings.Join(parts, "_")
if appName != "" {
v = appName + "_" + v
}
v = envVarRegex.ReplaceAllString(v, "_")
return strings.ToUpper(v)
}
func fileExists(name string) bool {
_, err := os.Stat(name)
return err == nil
}
// isPromotedMethod returns true if the method with the given name is promoted from
// an embedded struct.
// NOTE: this is currently _not_ a completely reliable method to identify this information,
// as there is no way using standard go or reflection to identify this. the method currently
// uses some undefined behavior of the go runtime that may change or may be unreliable when
// used by structs created with reflection or if debug information is not present
func isPromotedMethod(o any, method string) bool {
v := reflect.ValueOf(o)
t := v.Type()
m, ok := t.MethodByName(method)
if !ok {
return false
}
f := runtime.FuncForPC(m.Func.Pointer())
fileName, _ := f.FileLine(f.Entry())
return fileName == "<autogenerated>"
}