github.com/graemephi/kahugo@v0.62.3-0.20211121071557-d78c0423784d/common/herrors/line_number_extractors.go (about)

     1  // Copyright 2018 The Hugo Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package herrors
    15  
    16  import (
    17  	"regexp"
    18  	"strconv"
    19  
    20  	"github.com/pkg/errors"
    21  
    22  	"github.com/pelletier/go-toml/v2"
    23  )
    24  
    25  var lineNumberExtractors = []lineNumberExtractor{
    26  	// Template/shortcode parse errors
    27  	newLineNumberErrHandlerFromRegexp(".*:(\\d+):(\\d*):"),
    28  	newLineNumberErrHandlerFromRegexp(".*:(\\d+):"),
    29  
    30  	// TOML parse errors
    31  	tomlLineNumberExtractor,
    32  	// YAML parse errors
    33  	newLineNumberErrHandlerFromRegexp("line (\\d+):"),
    34  
    35  	// i18n bundle errors
    36  	newLineNumberErrHandlerFromRegexp("\\((\\d+),\\s(\\d*)"),
    37  }
    38  
    39  type lineNumberExtractor func(e error) (int, int)
    40  
    41  var tomlLineNumberExtractor = func(e error) (int, int) {
    42  	e = errors.Cause(e)
    43  	if terr, ok := e.(*toml.DecodeError); ok {
    44  		return terr.Position()
    45  	}
    46  	return -1, -1
    47  }
    48  
    49  func newLineNumberErrHandlerFromRegexp(expression string) lineNumberExtractor {
    50  	re := regexp.MustCompile(expression)
    51  	return extractLineNo(re)
    52  }
    53  
    54  func extractLineNo(re *regexp.Regexp) lineNumberExtractor {
    55  	return func(e error) (int, int) {
    56  		if e == nil {
    57  			panic("no error")
    58  		}
    59  		col := 1
    60  		s := e.Error()
    61  		m := re.FindStringSubmatch(s)
    62  		if len(m) >= 2 {
    63  			lno, _ := strconv.Atoi(m[1])
    64  			if len(m) > 2 {
    65  				col, _ = strconv.Atoi(m[2])
    66  			}
    67  
    68  			if col <= 0 {
    69  				col = 1
    70  			}
    71  
    72  			return lno, col
    73  		}
    74  
    75  		return -1, col
    76  	}
    77  }