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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
// limitations under the License.
package herrors
import (
"regexp"
"strconv"
"github.com/pkg/errors"
"github.com/pelletier/go-toml/v2"
)
var lineNumberExtractors = []lineNumberExtractor{
// Template/shortcode parse errors
newLineNumberErrHandlerFromRegexp(".*:(\\d+):(\\d*):"),
newLineNumberErrHandlerFromRegexp(".*:(\\d+):"),
// TOML parse errors
tomlLineNumberExtractor,
// YAML parse errors
newLineNumberErrHandlerFromRegexp("line (\\d+):"),
// i18n bundle errors
newLineNumberErrHandlerFromRegexp("\\((\\d+),\\s(\\d*)"),
}
type lineNumberExtractor func(e error) (int, int)
var tomlLineNumberExtractor = func(e error) (int, int) {
e = errors.Cause(e)
if terr, ok := e.(*toml.DecodeError); ok {
return terr.Position()
}
return -1, -1
}
func newLineNumberErrHandlerFromRegexp(expression string) lineNumberExtractor {
re := regexp.MustCompile(expression)
return extractLineNo(re)
}
func extractLineNo(re *regexp.Regexp) lineNumberExtractor {
return func(e error) (int, int) {
if e == nil {
panic("no error")
}
col := 1
s := e.Error()
m := re.FindStringSubmatch(s)
if len(m) >= 2 {
lno, _ := strconv.Atoi(m[1])
if len(m) > 2 {
col, _ = strconv.Atoi(m[2])
}
if col <= 0 {
col = 1
}
return lno, col
}
return -1, col
}
}
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