mopac-pdf v0: markdown to beautiful PDFs via digest-pinned typst

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

vendor/github.com/wcharczuk/go-chart/v2/time_series.go

@@ -0,0 +1,91 @@
+package chart
+
+import (
+	"fmt"
+	"time"
+)
+
+// Interface Assertions.
+var (
+	_ Series                 = (*TimeSeries)(nil)
+	_ FirstValuesProvider    = (*TimeSeries)(nil)
+	_ LastValuesProvider     = (*TimeSeries)(nil)
+	_ ValueFormatterProvider = (*TimeSeries)(nil)
+)
+
+// TimeSeries is a line on a chart.
+type TimeSeries struct {
+	Name  string
+	Style Style
+
+	YAxis YAxisType
+
+	XValues []time.Time
+	YValues []float64
+}
+
+// GetName returns the name of the time series.
+func (ts TimeSeries) GetName() string {
+	return ts.Name
+}
+
+// GetStyle returns the line style.
+func (ts TimeSeries) GetStyle() Style {
+	return ts.Style
+}
+
+// Len returns the number of elements in the series.
+func (ts TimeSeries) Len() int {
+	return len(ts.XValues)
+}
+
+// GetValues gets x, y values at a given index.
+func (ts TimeSeries) GetValues(index int) (x, y float64) {
+	x = TimeToFloat64(ts.XValues[index])
+	y = ts.YValues[index]
+	return
+}
+
+// GetFirstValues gets the first values.
+func (ts TimeSeries) GetFirstValues() (x, y float64) {
+	x = TimeToFloat64(ts.XValues[0])
+	y = ts.YValues[0]
+	return
+}
+
+// GetLastValues gets the last values.
+func (ts TimeSeries) GetLastValues() (x, y float64) {
+	x = TimeToFloat64(ts.XValues[len(ts.XValues)-1])
+	y = ts.YValues[len(ts.YValues)-1]
+	return
+}
+
+// GetValueFormatters returns value formatter defaults for the series.
+func (ts TimeSeries) GetValueFormatters() (x, y ValueFormatter) {
+	x = TimeValueFormatter
+	y = FloatValueFormatter
+	return
+}
+
+// GetYAxis returns which YAxis the series draws on.
+func (ts TimeSeries) GetYAxis() YAxisType {
+	return ts.YAxis
+}
+
+// Render renders the series.
+func (ts TimeSeries) Render(r Renderer, canvasBox Box, xrange, yrange Range, defaults Style) {
+	style := ts.Style.InheritFrom(defaults)
+	Draw.LineSeries(r, canvasBox, xrange, yrange, style, ts)
+}
+
+// Validate validates the series.
+func (ts TimeSeries) Validate() error {
+	if len(ts.XValues) == 0 {
+		return fmt.Errorf("time series must have xvalues set")
+	}
+
+	if len(ts.YValues) == 0 {
+		return fmt.Errorf("time series must have yvalues set")
+	}
+	return nil
+}