99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package text
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import (
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"fmt"
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"os"
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"strings"
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"github.com/gohugoio/hugo/common/terminal"
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)
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// Positioner represents a thing that knows its position in a text file or stream,
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// typically an error.
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type Positioner interface {
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Position() Position
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}
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// Position holds a source position in a text file or stream.
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type Position struct {
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Filename string // filename, if any
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Offset int // byte offset, starting at 0. It's set to -1 if not provided.
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LineNumber int // line number, starting at 1
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ColumnNumber int // column number, starting at 1 (character count per line)
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}
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func (pos Position) String() string {
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if pos.Filename == "" {
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pos.Filename = "<stream>"
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}
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return positionStringFormatfunc(pos)
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}
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// IsValid returns true if line number is > 0.
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func (pos Position) IsValid() bool {
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return pos.LineNumber > 0
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}
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var positionStringFormatfunc func(p Position) string
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func createPositionStringFormatter(formatStr string) func(p Position) string {
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if formatStr == "" {
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formatStr = "\":file::line::col\""
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}
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identifiers := []string{":file", ":line", ":col"}
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var identifiersFound []string
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for i := range formatStr {
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for _, id := range identifiers {
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if strings.HasPrefix(formatStr[i:], id) {
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identifiersFound = append(identifiersFound, id)
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}
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}
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}
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replacer := strings.NewReplacer(":file", "%s", ":line", "%d", ":col", "%d")
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format := replacer.Replace(formatStr)
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f := func(pos Position) string {
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args := make([]interface{}, len(identifiersFound))
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for i, id := range identifiersFound {
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switch id {
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case ":file":
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args[i] = pos.Filename
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case ":line":
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args[i] = pos.LineNumber
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case ":col":
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args[i] = pos.ColumnNumber
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}
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}
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msg := fmt.Sprintf(format, args...)
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if terminal.IsTerminal(os.Stdout) {
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return terminal.Notice(msg)
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}
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return msg
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}
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return f
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}
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func init() {
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positionStringFormatfunc = createPositionStringFormatter(os.Getenv("HUGO_FILE_LOG_FORMAT"))
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}
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