Move to vl-convert

Project.toml

@@ -1,16 +1,16 @@
 name = "Deneb"
 uuid = "b5a61f88-a05b-4725-9526-4eca17cec623"
 authors = ["brucala <brucala@gmail.com>"]
-version = "0.4.3"
+version = "0.5.0"
 
 [deps]
 DefaultApplication = "3f0dd361-4fe0-5fc6-8523-80b14ec94d85"
 JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 MultilineStrings = "1e8d2bf6-9821-4900-9a2f-4d87552df2bd"
-NodeJS_18_jll = "c1e1d063-8311-5f52-a749-c7b05e91ae37"
 REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
+VLConvert_jll = "f937dff4-8506-5d6a-ae08-1f9bcdfef0bf"
 
 [weakdeps]
 Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"
@@ -26,4 +26,5 @@ JSON = "0.21"
 MultilineStrings = "1"
 NetworkLayout = "0.4.7"
 Tables = "1"
+VLConvert_jll = "1.8.0"
 julia = "1.9"

src/Deneb.jl

@@ -1,7 +1,7 @@
 module Deneb
 
 using UUIDs
-using NodeJS_18_jll
+using VLConvert_jll
 using JSON, Tables
 using MultilineStrings: indent
 using DefaultApplication

src/render.jl

@@ -56,19 +56,23 @@ end
 ### Convert to image
 ###
 
-convert(s::AbstractSpec, fmt::Symbol) = read(
-    pipeline(vl2command(fmt), stdin=IOBuffer(json(s))),
-    String
-)
-function vl2command(fmt::Symbol)
-    fmt == :vega && (fmt = :vg)
-    valid_formats = (:vg, :png, :svg, :pdf)
+function convert(spec::AbstractSpec, fmt::Symbol)
+    fname = tempname()
+    run_vlconvert(spec, fmt, fname)
+    return read(fname, String)
+end
+
+function run_vlconvert(spec::AbstractSpec, fmt::Symbol, fname::String)
+    valid_formats = (:vg, :vega, :png, :svg, :pdf, :jpeg, :jpg)
     Symbol(fmt) ∉ valid_formats && return @warn("Format must be any of $valid_formats")
-    deps = ["--yes", "-p", "vega", "-p", "vega-lite"]
-    fmt == :vg || append!(deps, ["-p", "canvas"])
-    Cmd(`$(node()) $npx $deps vl2$fmt`)
+    fmt == :vega && (fmt = :vg)
+    fmt == :jpg && (fmt = :jpeg)
+    spec_file = tempname()
+    write(spec_file, json(spec))
+    run(`$(vlconvert()) vl2$fmt -i $spec_file -o $fname`)
 end
 
+
 ###
 ### HTML templates
 ###
@@ -210,7 +214,7 @@ html(spec;
 
 """
     save(filename, spec)
-Saves the spec as filename. Allowed formats are `.json`, `.html`, `.png`, `.svg`, `.pdf`.
+Saves the spec as filename. Allowed formats are `.json`, `.html`, `.png`, `.svg`, `.pdf`, `.jpeg/jpg`, `.vg/vega`.
 """
 function save(filename::AbstractString, mime::AbstractString, s::VegaLiteSpec)
     showable(s, mime) || return
@@ -220,20 +224,8 @@ function save(filename::AbstractString, mime::AbstractString, s::VegaLiteSpec)
 end
 function save(filename::AbstractString, s::VegaLiteSpec)
     file_ext = lowercase(splitext(filename)[2])
-    if file_ext == ".svg"
-        mime = "image/svg+xml"
-    elseif file_ext == ".pdf"
-        mime = "application/pdf"
-    elseif file_ext == ".png"
-        mime = "image/png"
-    elseif file_ext == ".json"
-        mime = "application/json"
-    elseif file_ext == ".html"
-        return write(filename, html(s))
-    else
-        throw(ArgumentError("Unknown file type."))
-    end
-    save(filename, mime, s)
+    file_ext == ".html" && return write(filename, html(s))
+    run_vlconvert(s, Symbol(file_ext[2:end]), filename)
 end
 
 ###