github.com/containerd/nerdctl@v1.7.7/pkg/errutil/exit_coder.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package errutil
    18  
    19  import "os"
    20  
    21  type ExitCoder interface {
    22  	error
    23  	ExitCode() int
    24  }
    25  
    26  // ExitCodeError is to allow the program to exit with status code without outputting an error message.
    27  type ExitCodeError struct {
    28  	exitCode int
    29  }
    30  
    31  func NewExitCoderErr(exitCode int) ExitCodeError {
    32  	return ExitCodeError{
    33  		exitCode: exitCode,
    34  	}
    35  }
    36  
    37  func (e ExitCodeError) ExitCode() int {
    38  	return e.exitCode
    39  }
    40  
    41  func (e ExitCodeError) Error() string {
    42  	return ""
    43  }
    44  
    45  func HandleExitCoder(err error) {
    46  	if err == nil {
    47  		return
    48  	}
    49  
    50  	if exitErr, ok := err.(ExitCoder); ok {
    51  		os.Exit(exitErr.ExitCode())
    52  	}
    53  }