add function to ensure kaleido plotly version is the same used by the…

… library

Can also be overidden with PLOTLY_VERSION

ext/PlotlyKaleidoExt.jl

@@ -1,8 +1,35 @@
 module PlotlyKaleidoExt
 
-using PlutoPlotly: PlutoPlot
-using PlotlyKaleido: savefig, PlotlyKaleido
+using PlutoPlotly: PlutoPlot, get_plotly_version
+using PlotlyKaleido: savefig, PlotlyKaleido, restart, P, is_running
 
-PlotlyKaleido.savefig(io::IO, p::PlutoPlot, args...; kwargs...) = savefig(io, p.Plot, args...; kwargs...)
+function get_version_in_kaleido()
+    is_running() || return nothing
+    exec = P.proc.cmd.exec
+    flag_idx = findfirst(startswith("https://cdn.plot.ly"), exec)
+    isnothing(flag_idx) && return nothing
+    url = exec[flag_idx]
+    m = match(r"https://cdn.plot.ly/plotly-(\d+\.\d+\.\d+).min.js", url)
+    return first(m.captures) |> VersionNumber
+end
+function ensure_correct_version()
+    pkgversion(PlotlyKaleido) >= v"2.2.1" || return # If we can't change version, we just assume it's correct
+    current_version = get_plotly_version()
+    # We find the flags in the cmd used to start kaleido, if we have a specified
+    # version, that appears as a url of the corresponding version on the plotly
+    # CDN, see https://github.com/JuliaPlots/PlotlyKaleido.jl/pull/9 for more
+    # details
+    kaleido_plotly_version = get_version_in_kaleido()
+    if isnothing(kaleido_plotly_version) || kaleido_plotly_version != current_version
+        @info "(Re)Starting the kaleido process with plotly version $current_version"
+        restart(; plotly_version = current_version) # Process it not active, we simply start it with the correct version
+        return
+    end
+end
+
+function PlotlyKaleido.savefig(io::IO, p::PlutoPlot, args...; kwargs...) 
+    ensure_correct_version()
+    savefig(io, p.Plot, args...; kwargs...)
+end
 
 end

test/extensions.jl

@@ -1,18 +1,28 @@
 using PlutoPlotly
+using PlutoPlotly: PLOTLY_VERSION
 using Test
+using ScopedValues
 
 ## PlotlyKaleido Extension ##
 using PlotlyKaleido
 if Sys.islinux()
     # We only test this in linux as the library fail in CI on Mac OS and Windows
     PlotlyKaleido.start()
 
-    mktempdir() do dir
-        cd() do 
-            p = plot(rand(10,4))
-            @test_nowarn savefig(p, "test_savefig.png")
-            @test isfile("test_savefig.png")
+    try
+        mktempdir() do dir
+            cd() do 
+                p = plot(rand(10,4))
+                @test_logs (:info, r"with plotly version 2.34.0") savefig(p, "test_savefig.png")
+                @test isfile("test_savefig.png")
+                @test_logs (:info, r"with plotly version 2.33.0") with(PLOTLY_VERSION => "2.33") do
+                    savefig(p, "test_changeversion.png")
+                end
+                @test isfile("test_changeversion.png")
+            end
         end
+    finally
+        PlotlyKaleido.kill_kaleido()
     end
 end