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// 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
// limitatio ns under the License.
package herrors
import (
"fmt"
"regexp"
"strconv"
)
var lineNumberExtractors = []lineNumberExtractor{
// Template/shortcode parse errors
newLineNumberErrHandlerFromRegexp("(.*?:)(\\d+)(:.*)"),
// TOML parse errors
newLineNumberErrHandlerFromRegexp("(.*Near line )(\\d+)(\\s.*)"),
// YAML parse errors
newLineNumberErrHandlerFromRegexp("(line )(\\d+)(:)"),
}
type lineNumberExtractor func(e error, offset int) (int, string)
func newLineNumberErrHandlerFromRegexp(expression string) lineNumberExtractor {
re := regexp.MustCompile(expression)
return extractLineNo(re)
}
func extractLineNo(re *regexp.Regexp) lineNumberExtractor {
return func(e error, offset int) (int, string) {
if e == nil {
panic("no error")
}
s := e.Error()
m := re.FindStringSubmatch(s)
if len(m) == 4 {
i, _ := strconv.Atoi(m[2])
msg := e.Error()
if offset != 0 {
i = i + offset
msg = re.ReplaceAllString(s, fmt.Sprintf("${1}%d${3}", i))
}
return i, msg
}
return -1, ""
}
}
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