The source code is based on https://github.com/golang/tools/tree/master/cmd/stringer, and on this basis, the function of obtaining the error code according to error is added.
go install github.com/fengxuway/errcode@latest
Here is help documention
$ errcode -h
Usage of errcode:
errcode [flags] -type T [directory]
errcode [flags] -type T files... # Must be a single package
For more information, see:
https://github.com/fengxuway/errcode
Flags:
-codefunc string
error code function name (default "Code")
-linecomment
use line comment text as printed text when present
-output string
output file name; default srcdir/<type>_errcode.go
-tags string
comma-separated list of build tags to apply
-trimprefix prefix
trim the prefix from the generated constant names
-type string
comma-separated list of type names; must be set
-unknowncode int
set unknown error code when not match (default -1)
In example/example.go source file, define Err and Err2 enum for error code, we can command:
errcode -type=Err,Err2 --linecomment -unknowncode=-1 -codefunc=Code
Then err_errcode.go source file is generated!
PS: generated file name always with _errcode.go as suffix.