97 lines
3.2 KiB
Text
97 lines
3.2 KiB
Text
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# Frontmatter Processing Utilities
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# Functions for extracting and processing YAML frontmatter from markdown files
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# Extract frontmatter from markdown file
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export def extract_frontmatter [input_file: string] {
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try {
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let content = (open $input_file | lines)
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if ($content | first) == "---" {
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mut frontmatter = []
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mut in_frontmatter = false
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mut line_count = 0
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for line in $content {
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$line_count = ($line_count + 1)
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if $line_count == 1 and $line == "---" {
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$in_frontmatter = true
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continue
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}
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if $in_frontmatter and $line == "---" {
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break
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}
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if $in_frontmatter and not ($line | str starts-with "#") { # Skip comment lines
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$frontmatter = ($frontmatter | append $line)
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}
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}
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$frontmatter | str join "\n"
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} else {
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""
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}
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} catch {
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""
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}
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}
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# Extract value from frontmatter
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export def extract_from_frontmatter [frontmatter: string, key: string, default: string] {
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if ($frontmatter | is-empty) {
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return $default
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}
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let lines = ($frontmatter | lines)
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for line in $lines {
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# Simple approach: look for "key: value" pattern
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if ($line | str starts-with $"($key):") {
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let value_part = ($line | str replace $"($key):" "" | str trim)
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# Remove quotes if present
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let clean_value = ($value_part | str replace -a '"' '' | str replace -a "'" '')
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return $clean_value
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}
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}
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$default
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}
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# Extract YAML array from frontmatter (for tags)
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export def extract_yaml_array [frontmatter: string, key: string] {
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let tags_str = extract_from_frontmatter $frontmatter $key "[]"
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if $tags_str == "[]" or ($tags_str | is-empty) {
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return []
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}
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# Parse YAML array format: ["item1", "item2", "item3"]
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let tags = ($tags_str | str replace -a '[' '' | str replace -a ']' '' | str replace -a '"' '' | split row ',' | each { |tag| $tag | str trim })
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$tags | where $it != ""
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}
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# Collect all categories and tags from markdown files
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export def collect_categories_and_tags [source_dir: string] {
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mut all_categories = []
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mut all_tags = []
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let md_files = (glob $"($source_dir)/**/*.md")
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for md_file in $md_files {
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let frontmatter = extract_frontmatter $md_file
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let published = (extract_from_frontmatter $frontmatter "published" "true")
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if ($published | str downcase) == "true" {
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# Extract category (singular)
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let category = (extract_from_frontmatter $frontmatter "category" "")
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if not ($category | is-empty) {
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$all_categories = ($all_categories | append $category)
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}
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# Extract tags (array)
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let tags = extract_yaml_array $frontmatter "tags"
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for tag in $tags {
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$all_tags = ($all_tags | append $tag)
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}
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}
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}
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{
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categories: ($all_categories | uniq),
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tags: ($all_tags | uniq)
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}
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}
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