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e9f88757ba
Same rationale as for runtime. With tests, the blackfriday replacement was actually meaningful, so I refactored some imports. Signed-off-by: Aurélien Bombo <abombo@microsoft.com>
98 lines
2.1 KiB
Go
98 lines
2.1 KiB
Go
//
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// Copyright (c) 2019 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package main
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import (
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"errors"
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"fmt"
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"os"
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"strings"
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"unicode"
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bf "github.com/russross/blackfriday/v2"
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)
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// fileExists returns true if the specified file exists, else false.
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func fileExists(path string) bool {
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if _, err := os.Stat(path); os.IsNotExist(err) {
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return false
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}
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return true
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}
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// splitLink splits a link like "foo.md#section-name" into a filename
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// ("foo.md") and a section name ("section-name").
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func splitLink(linkName string) (fileName, sectionName string, err error) {
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if linkName == "" {
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return "", "", errors.New("need linkName")
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}
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if !strings.Contains(linkName, anchorPrefix) {
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return linkName, "", nil
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}
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fields := strings.Split(linkName, anchorPrefix)
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expectedFields := 2
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foundFields := len(fields)
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if foundFields != expectedFields {
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return "", "", fmt.Errorf("invalid link %s: expected %d fields, found %d", linkName, expectedFields, foundFields)
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}
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fileName = fields[0]
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sectionName = fields[1]
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return fileName, sectionName, nil
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}
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// validHeadingIDChar is a strings.Map() function used to determine which characters
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// can appear in a heading ID.
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func validHeadingIDChar(r rune) rune {
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if unicode.IsLetter(r) ||
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unicode.IsNumber(r) ||
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unicode.IsSpace(r) ||
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r == '-' || r == '_' {
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return r
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}
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// Remove all other chars from destination string
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return -1
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}
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// createHeadingID creates an HTML anchor name for the specified heading
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func createHeadingID(headingName string) (id string, err error) {
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if headingName == "" {
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return "", fmt.Errorf("need heading name")
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}
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// Munge the original heading into an id by:
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//
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// - removing invalid characters.
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// - lower-casing.
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// - replace spaces
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id = strings.Map(validHeadingIDChar, headingName)
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id = strings.ToLower(id)
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id = strings.Replace(id, " ", "-", -1)
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return id, nil
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}
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func checkNode(node *bf.Node, expectedType bf.NodeType) error {
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if node == nil {
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return errors.New("node cannot be nil")
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}
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if node.Type != expectedType {
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return fmt.Errorf("expected %v node, found %v", expectedType, node.Type)
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}
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return nil
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}
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