1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
// Copyright 2022 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 contains common Hugo errors and error related utilities.
package herrors
import (
"io"
"io/ioutil"
"path/filepath"
"strings"
"github.com/gohugoio/hugo/common/text"
)
// LineMatcher contains the elements used to match an error to a line
type LineMatcher struct {
Position text.Position
Error error
LineNumber int
Offset int
Line string
}
// LineMatcherFn is used to match a line with an error.
// It returns the column number or 0 if the line was found, but column could not be determinde. Returns -1 if no line match.
type LineMatcherFn func(m LineMatcher) int
// SimpleLineMatcher simply matches by line number.
var SimpleLineMatcher = func(m LineMatcher) int {
if m.Position.LineNumber == m.LineNumber {
// We found the line, but don't know the column.
return 0
}
return -1
}
// NopLineMatcher is a matcher that always returns 1.
// This will effectively give line 1, column 1.
var NopLineMatcher = func(m LineMatcher) int {
return 1
}
// ErrorContext contains contextual information about an error. This will
// typically be the lines surrounding some problem in a file.
type ErrorContext struct {
// If a match will contain the matched line and up to 2 lines before and after.
// Will be empty if no match.
Lines []string
// The position of the error in the Lines above. 0 based.
LinesPos int
// The position of the content in the file. Note that this may be different from the error's position set
// in FileError.
Position text.Position
// The lexer to use for syntax highlighting.
// https://gohugo.io/content-management/syntax-highlighting/#list-of-chroma-highlighting-languages
ChromaLexer string
}
func chromaLexerFromType(fileType string) string {
switch fileType {
case "html", "htm":
return "go-html-template"
}
return fileType
}
func extNoDelimiter(filename string) string {
return strings.TrimPrefix(filepath.Ext(filename), ".")
}
func chromaLexerFromFilename(filename string) string {
if strings.Contains(filename, "layouts") {
return "go-html-template"
}
ext := extNoDelimiter(filename)
return chromaLexerFromType(ext)
}
func locateErrorInString(src string, matcher LineMatcherFn) *ErrorContext {
return locateError(strings.NewReader(src), &fileError{}, matcher)
}
func locateError(r io.Reader, le FileError, matches LineMatcherFn) *ErrorContext {
if le == nil {
panic("must provide an error")
}
ectx := &ErrorContext{LinesPos: -1, Position: text.Position{Offset: -1}}
b, err := ioutil.ReadAll(r)
if err != nil {
return ectx
}
lines := strings.Split(string(b), "\n")
lineNo := 0
posBytes := 0
for li, line := range lines {
lineNo = li + 1
m := LineMatcher{
Position: le.Position(),
Error: le,
LineNumber: lineNo,
Offset: posBytes,
Line: line,
}
v := matches(m)
if ectx.LinesPos == -1 && v != -1 {
ectx.Position.LineNumber = lineNo
ectx.Position.ColumnNumber = v
break
}
posBytes += len(line)
}
if ectx.Position.LineNumber > 0 {
low := ectx.Position.LineNumber - 3
if low < 0 {
low = 0
}
if ectx.Position.LineNumber > 2 {
ectx.LinesPos = 2
} else {
ectx.LinesPos = ectx.Position.LineNumber - 1
}
high := ectx.Position.LineNumber + 2
if high > len(lines) {
high = len(lines)
}
ectx.Lines = lines[low:high]
}
return ectx
}
|
