74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
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package discovery
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import (
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"strings"
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)
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// Frontmatter holds the leniently parsed leading YAML block of an item.
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type Frontmatter struct {
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Name string
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Description string
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Tags []string
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Requires []string
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}
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// ParseFrontmatter extracts name, description, tags and requires from a
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// leading `---` fenced block. Parsing is deliberately lenient: a block that
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// opens but never closes, or contains lines without a colon, yields warnings
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// instead of failures; the parseable prefix still wins. Files without a
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// leading fence have no frontmatter and no warning.
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func ParseFrontmatter(data []byte) (Frontmatter, []string) {
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var fm Frontmatter
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var warnings []string
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lines := strings.Split(strings.ReplaceAll(string(data), "\r\n", "\n"), "\n")
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if len(lines) == 0 || strings.TrimSpace(lines[0]) != "---" {
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return fm, nil
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}
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closed := false
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for _, line := range lines[1:] {
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if strings.TrimSpace(line) == "---" {
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closed = true
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break
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}
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trimmed := strings.TrimSpace(line)
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if trimmed == "" {
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continue
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}
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key, value, ok := strings.Cut(trimmed, ":")
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if !ok {
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warnings = append(warnings, "malformed frontmatter line (missing colon): "+trimmed)
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continue
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}
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key = strings.TrimSpace(key)
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value = strings.TrimSpace(value)
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switch strings.ToLower(key) {
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case "name":
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fm.Name = value
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case "description":
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fm.Description = value
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case "tags":
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fm.Tags = splitList(value)
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case "requires":
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fm.Requires = splitList(value)
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}
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}
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if !closed {
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warnings = append(warnings, "frontmatter block not closed")
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}
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return fm, warnings
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}
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func splitList(v string) []string {
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if v == "" {
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return nil
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}
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parts := strings.Split(v, ",")
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var out []string
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for _, p := range parts {
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if t := strings.TrimSpace(p); t != "" {
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out = append(out, t)
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}
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}
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return out
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}
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