mrcharles
10e930e46d
Go CLI that turns the markdown currency of this stack (Redmine notes, Discourse posts, briefing output) into typeset PDFs: two embedded typst templates (report with title page/TOC/headers, dense brief), front-matter (title/subtitle/author/date/classification/template), GFM tables, and bar charts rendered in pure Go (go-chart) from fenced chart data blocks. Engine is a prebuilt typst 0.15.1 container pinned by digest and run --network none; PDF bytes to stdout or -o. Exit codes 0/1/2. All dev in docker (dev.sh/Makefile); unit tests + golden typst fixtures plus a host-side smoke against the real engine container. Generated with Crush Assisted-by: Crush:glm-5.2
78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
// Package frontmatter parses the key: value front-matter block that may
|
|
// open a mopac-pdf markdown input (delimited by --- lines).
|
|
package frontmatter
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// Meta is the parsed front-matter. The well-known keys mopac-pdf templates
|
|
// consume are Title, Subtitle, Author, Date, Classification and Template;
|
|
// anything else found in the block is kept in Extra (never an error: the
|
|
// currency of this stack is loose markdown).
|
|
type Meta struct {
|
|
Title string
|
|
Subtitle string
|
|
Author string
|
|
Date string
|
|
Classification string
|
|
Template string
|
|
Extra map[string]string
|
|
}
|
|
|
|
// Split separates an optional front-matter block from the markdown body and
|
|
// parses it. Input without a leading --- line is all body, empty Meta.
|
|
func Split(input string) (Meta, string, error) {
|
|
var meta Meta
|
|
first, rest, ok := strings.Cut(input, "\n")
|
|
if strings.TrimRight(first, "\r") != "---" || !ok {
|
|
return meta, input, nil
|
|
}
|
|
end := -1
|
|
var block []string
|
|
for i, line := range strings.Split(rest, "\n") {
|
|
trimmed := strings.TrimRight(line, "\r")
|
|
if trimmed == "---" || trimmed == "..." {
|
|
end = i
|
|
break
|
|
}
|
|
block = append(block, trimmed)
|
|
}
|
|
if end < 0 {
|
|
return meta, input, fmt.Errorf("frontmatter: opening --- without closing ---")
|
|
}
|
|
body := strings.Join(strings.Split(rest, "\n")[end+1:], "\n")
|
|
body = strings.TrimPrefix(body, "\n")
|
|
meta.Extra = map[string]string{}
|
|
for _, line := range block {
|
|
line = strings.TrimSpace(line)
|
|
if line == "" || strings.HasPrefix(line, "#") {
|
|
continue
|
|
}
|
|
key, value, ok := strings.Cut(line, ":")
|
|
if !ok {
|
|
return meta, "", fmt.Errorf("frontmatter: not a key: value line: %q", line)
|
|
}
|
|
key = strings.TrimSpace(key)
|
|
value = strings.Trim(strings.TrimSpace(value), `"'`)
|
|
switch strings.ToLower(key) {
|
|
case "title":
|
|
meta.Title = value
|
|
case "subtitle":
|
|
meta.Subtitle = value
|
|
case "author":
|
|
meta.Author = value
|
|
case "date":
|
|
meta.Date = value
|
|
case "classification":
|
|
meta.Classification = value
|
|
case "template":
|
|
meta.Template = value
|
|
default:
|
|
meta.Extra[key] = value
|
|
}
|
|
}
|
|
return meta, body, nil
|
|
}
|