func()

in indexbuilder.go [323:405]

• 71 lines of code
• 18 McCabe index (conditional complexity)

func (b *IndexBuilder) Add(doc Document) error {
	hasher := crc64.New(crc64.MakeTable(crc64.ISO))

	if idx := bytes.IndexByte(doc.Content, 0); idx >= 0 {
		doc.SkipReason = fmt.Sprintf("binary content at byte offset %d", idx)
		doc.Language = "binary"
	}

	if doc.SkipReason != "" {
		doc.Content = []byte(notIndexedMarker + doc.SkipReason)
		doc.Symbols = nil
		if doc.Language == "" {
			doc.Language = "skipped"
		}
	}

	sort.Sort(docSectionSlice(doc.Symbols))
	var last DocumentSection
	for i, s := range doc.Symbols {
		if i > 0 {
			if last.End > s.Start {
				return fmt.Errorf("sections overlap")
			}
		}
		last = s
	}
	if last.End > uint32(len(doc.Content)) {
		return fmt.Errorf("section goes past end of content")
	}

	if doc.SubRepositoryPath != "" {
		rel, err := filepath.Rel(doc.SubRepositoryPath, doc.Name)
		if err != nil || rel == doc.Name {
			return fmt.Errorf("path %q must start subrepo path %q", doc.Name, doc.SubRepositoryPath)
		}
	}
	docStr, runeSecs, err := b.contentPostings.newSearchableString(doc.Content, doc.Symbols)
	if err != nil {
		return err
	}
	nameStr, _, err := b.namePostings.newSearchableString([]byte(doc.Name), nil)
	if err != nil {
		return err
	}

	subRepoIdx, ok := b.subRepoIndices[doc.SubRepositoryPath]
	if !ok {
		return fmt.Errorf("unknown subrepo path %q", doc.SubRepositoryPath)
	}

	var mask uint64
	for _, br := range doc.Branches {
		m := b.branchMask(br)
		if m == 0 {
			return fmt.Errorf("no branch found for %s", br)
		}
		mask |= m
	}

	b.subRepos = append(b.subRepos, subRepoIdx)

	hasher.Write(doc.Content)

	b.contentStrings = append(b.contentStrings, docStr)
	b.runeDocSections = append(b.runeDocSections, runeSecs...)

	b.nameStrings = append(b.nameStrings, nameStr)
	b.docSections = append(b.docSections, doc.Symbols)
	b.branchMasks = append(b.branchMasks, mask)
	b.checksums = append(b.checksums, hasher.Sum(nil)...)

	langCode, ok := b.languageMap[doc.Language]
	if !ok {
		if len(b.languageMap) >= 255 {
			return fmt.Errorf("too many languages")
		}
		langCode = byte(len(b.languageMap))
		b.languageMap[doc.Language] = langCode
	}
	b.languages = append(b.languages, langCode)

	return nil
}