97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
package util
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import "fmt"
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// Err is the implementation of error that all goadb functions return.
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type Err struct {
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// Code is the high-level "type" of error.
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Code ErrCode
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// Message is a human-readable description of the error.
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Message string
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// Details is optional, and can be used to associate any auxiliary data with an error.
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Details interface{}
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// Cause is optional, and points to the more specific error that caused this one.
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Cause error
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}
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var _ error = &Err{}
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//go:generate stringer -type=ErrCode
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type ErrCode byte
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const (
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AssertionError ErrCode = iota
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ParseError ErrCode = iota
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// The server was not available on the request port and could not be started.
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ServerNotAvailable ErrCode = iota
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// General network error communicating with the server.
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NetworkError ErrCode = iota
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// The server returned an error message, but we couldn't parse it.
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AdbError ErrCode = iota
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// The server returned a "device not found" error.
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DeviceNotFound ErrCode = iota
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// Tried to perform an operation on a path that doesn't exist on the device.
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FileNoExistError ErrCode = iota
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)
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func Errorf(code ErrCode, format string, args ...interface{}) error {
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return &Err{
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Code: code,
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Message: fmt.Sprintf(format, args...),
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}
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}
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/*
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WrapErrf returns an *Err that wraps another *Err and has the same ErrCode.
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Panics if cause is not an *Err.
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To wrap generic errors, use WrapErrorf.
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*/
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func WrapErrf(cause error, format string, args ...interface{}) error {
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if cause == nil {
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return nil
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}
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err := cause.(*Err)
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return &Err{
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Code: err.Code,
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Message: fmt.Sprintf(format, args...),
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Cause: err,
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}
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}
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/*
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WrapErrorf returns an *Err that wraps another arbitrary error with an ErrCode and a message.
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If cause is nil, returns nil, so you can use it like
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return util.WrapErrorf(DoSomethingDangerous(), util.NetworkError, "well that didn't work")
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If cause is known to be of type *Err, use WrapErrf.
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*/
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func WrapErrorf(cause error, code ErrCode, format string, args ...interface{}) error {
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if cause == nil {
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return nil
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}
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return &Err{
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Code: code,
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Message: fmt.Sprintf(format, args...),
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Cause: cause,
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}
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}
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func AssertionErrorf(format string, args ...interface{}) error {
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return &Err{
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Code: AssertionError,
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Message: fmt.Sprintf(format, args...),
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}
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}
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func (err *Err) Error() string {
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msg := fmt.Sprintf("%s: %s", err.Code, err.Message)
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if err.Details != nil {
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msg = fmt.Sprintf("%s (%+v)", msg, err.Details)
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}
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return msg
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}
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