script.sh

## query sizes
typst query test.typ --input strings='["foo", "$ alpha = beta / (gamma + x^2)$"]' '<dimensions>' --field value

## produce images
typst compile test.typ --input strings='["foo", "$ alpha = beta / (gamma + x^2)$"]' '{p}.svg'

test.typ

#let test-strings = `
["0", "0.5", "1", "Typst"]
`.text
#let strings = sys.inputs.at("strings", default: test-strings)
#let strings = json(bytes(strings))
#let strings = strings.map(s => eval(s, mode: "markup"))


#let measurements(body) = context {
  let (width, height) = measure({
    set text(top-edge: "bounds", bottom-edge: "bounds")
    body
  })

  let ascender = measure({
    set text(top-edge: "ascender", bottom-edge: "baseline")
    body
  }).height

  let descender = measure({
    set text(top-edge: "baseline", bottom-edge: "descender")
    body
  }).height

  let dimensions = (height: height, width: width, descender: descender, ascender: ascender)
  [#metadata(dimensions)<dimensions>]
}

#set page(width: auto, height: auto, margin: 0pt)
#set text(top-edge: "bounds", bottom-edge: "bounds")

#for string in strings {
  measurements(string)
  string
  pagebreak()
}

// for debugging only
#context query(<dimensions>).map(m => m.value)

[{"height":"7.79pt","width":"14.58pt","descender":"2.71pt","ascender":"9.83pt"},{"height":"16.03pt","width":"43.99pt","descender":"7.59pt","ascender":"9.44pt"}]