Ghostscript extension

.github/workflows/ci.yml

@@ -55,7 +55,7 @@ jobs:
         if: startsWith(matrix.os,'ubuntu')
         run: |
           sudo apt-get -y update
-          sudo apt-get -y install latexmk ghostscript texlive-{luatex,latex-extra}
+          sudo apt-get -y install latexmk texlive-{luatex,latex-extra}
           sudo fc-cache -vr
       - uses: julia-actions/julia-buildpkg@latest
       - uses: julia-actions/julia-runtest@latest

Project.toml

@@ -6,6 +6,7 @@ version = "0.16.9"
 
 [deps]
 Format = "1fa38f19-a742-5d3f-a2b9-30dd87b9d5f8"
+Ghostscript_jll = "61579ee1-b43e-5ca0-a5da-69d92c66a64b"
 InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 LaTeXStrings = "b964fa9f-0449-5b57-a5c2-d3ea65f4040f"
 MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
@@ -28,6 +29,7 @@ TectonicExt = "tectonic_jll"
 [compat]
 DataFrames = "1"
 Format = "1.3"
+Ghostscript_jll = "9"
 LaTeXStrings = "0.3, 1"
 MacroTools = "0.4 - 0.5"
 OrderedCollections = "1"

docs/src/index.md

@@ -241,7 +241,9 @@ Alternatively, `render(str, mime)` can also be used to generate and display DVI,
 latexify(:(x/y)) |> s -> render(s, MIME("image/png"))
 ```
 
-PNG output relies on [ghostscript](https://www.ghostscript.com) or alternatively on [dvipng](http://www.nongnu.org/dvipng): if `render` is called with the keyword `convert = :gs`, ghostcript will be used to convert the `pdf` output to `png` format.
+PNG output defaults to using [ghostscript](https://www.ghostscript.com), which is available by default thanks to `Ghostscript_jll`. 
+
+[dvipng](http://www.nongnu.org/dvipng) can also be used by passing the keyword `convert = :dvipng` to `render`. However, this requires a working installation of dvipng. 
 
 SVG output relies on [dvisvgm](https://dvisvgm.de) or alternatively on [pdf2svg](https://github.com/dawbarton/pdf2svg).
 

src/Latexify.jl

@@ -14,6 +14,7 @@ using MacroTools: postwalk
 import MacroTools
 using Format
 import Base.showerror
+import Ghostscript_jll
 
 export latexify, md, copy_to_clipboard, auto_display, set_default, get_default,
     reset_default, @latexrecipe, render, @latexify, @latexrun, @latexdefine

src/utils.jl

@@ -163,7 +163,7 @@ function render(s::LaTeXString, mime::MIME"image/png";
         # prefer tex -> pdf -> png instead
         if convert === :gs
             aux_mime = MIME("application/pdf")
-            ghostscript_command = get(ENV, "GHOSTSCRIPT", Sys.iswindows() ? "gswin64c" : "gs")
+            ghostscript_command = Ghostscript_jll.gs()
             cmd = `$ghostscript_command $ghostscript_flags  -o $name.$ext $aux_name.pdf`
         elseif convert === :dvipng
             aux_mime = MIME("application/x-dvi")

test/utils_test.jl

@@ -104,3 +104,7 @@ using tectonic_jll
 pdf_file = render(L"x^2"; open=false) # should now not throw
 @test isfile(pdf_file)
 @test_throws Latexify.LatexifyRenderError render(L"x^2^3"; open=false)
+
+# Check that Ghostscript render works
+png_file = render(L"x^2", MIME("image/png"); open=false)
+@test isfile(png_file)