mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-29 20:42:07 -05:00
131 lines
3.3 KiB
Go
131 lines
3.3 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package herrors
|
|
|
|
import (
|
|
"encoding/json"
|
|
|
|
"github.com/gohugoio/hugo/common/text"
|
|
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
var _ causer = (*fileError)(nil)
|
|
|
|
// FileError represents an error when handling a file: Parsing a config file,
|
|
// execute a template etc.
|
|
type FileError interface {
|
|
error
|
|
|
|
text.Positioner
|
|
|
|
// A string identifying the type of file, e.g. JSON, TOML, markdown etc.
|
|
Type() string
|
|
}
|
|
|
|
var _ FileError = (*fileError)(nil)
|
|
|
|
type fileError struct {
|
|
position text.Position
|
|
|
|
fileType string
|
|
|
|
cause error
|
|
}
|
|
|
|
// Position returns the text position of this error.
|
|
func (e fileError) Position() text.Position {
|
|
return e.position
|
|
}
|
|
|
|
func (e *fileError) Type() string {
|
|
return e.fileType
|
|
}
|
|
|
|
func (e *fileError) Error() string {
|
|
if e.cause == nil {
|
|
return ""
|
|
}
|
|
return e.cause.Error()
|
|
}
|
|
|
|
func (f *fileError) Cause() error {
|
|
return f.cause
|
|
}
|
|
|
|
// NewFileError creates a new FileError.
|
|
func NewFileError(fileType string, offset, lineNumber, columnNumber int, err error) FileError {
|
|
pos := text.Position{Offset: offset, LineNumber: lineNumber, ColumnNumber: columnNumber}
|
|
return &fileError{cause: err, fileType: fileType, position: pos}
|
|
}
|
|
|
|
// UnwrapFileError tries to unwrap a FileError from err.
|
|
// It returns nil if this is not possible.
|
|
func UnwrapFileError(err error) FileError {
|
|
for err != nil {
|
|
switch v := err.(type) {
|
|
case FileError:
|
|
return v
|
|
case causer:
|
|
err = v.Cause()
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ToFileErrorWithOffset will return a new FileError with a line number
|
|
// with the given offset from the original.
|
|
func ToFileErrorWithOffset(fe FileError, offset int) FileError {
|
|
pos := fe.Position()
|
|
return ToFileErrorWithLineNumber(fe, pos.LineNumber+offset)
|
|
}
|
|
|
|
// ToFileErrorWithOffset will return a new FileError with the given line number.
|
|
func ToFileErrorWithLineNumber(fe FileError, lineNumber int) FileError {
|
|
pos := fe.Position()
|
|
pos.LineNumber = lineNumber
|
|
return &fileError{cause: fe, fileType: fe.Type(), position: pos}
|
|
}
|
|
|
|
// ToFileError will convert the given error to an error supporting
|
|
// the FileError interface.
|
|
func ToFileError(fileType string, err error) FileError {
|
|
for _, handle := range lineNumberExtractors {
|
|
lno, col := handle(err)
|
|
offset, typ := extractOffsetAndType(err)
|
|
if fileType == "" {
|
|
fileType = typ
|
|
}
|
|
|
|
if lno > 0 || offset != -1 {
|
|
return NewFileError(fileType, offset, lno, col, err)
|
|
}
|
|
}
|
|
// Fall back to the pointing to line number 1.
|
|
return NewFileError(fileType, -1, 1, 1, err)
|
|
}
|
|
|
|
func extractOffsetAndType(e error) (int, string) {
|
|
e = errors.Cause(e)
|
|
switch v := e.(type) {
|
|
case *json.UnmarshalTypeError:
|
|
return int(v.Offset), "json"
|
|
case *json.SyntaxError:
|
|
return int(v.Offset), "json"
|
|
default:
|
|
return -1, ""
|
|
}
|
|
}
|