Add package extension for Makie

Project.toml

@@ -42,6 +42,15 @@ Triangulate = "f7e6ffb2-c36d-4f8f-a77e-16e897189344"
 TriplotBase = "981d1d27-644d-49a2-9326-4793e63143c3"
 TriplotRecipes = "808ab39a-a642-4abf-81ff-4cb34ebbffa3"
 
+[weakdeps]
+Makie = "ee78f7c6-11fb-53f2-987a-cfe4a2b5a57a"
+
+[extensions]
+TrixiMakieExt = "Makie"
+
+[extras]
+Makie = "ee78f7c6-11fb-53f2-987a-cfe4a2b5a57a"
+
 [compat]
 CodeTracking = "1.0.5"
 ConstructionBase = "1.3"
@@ -53,6 +62,7 @@ HDF5 = "0.14, 0.15, 0.16"
 IfElse = "0.1"
 LinearMaps = "2.7, 3.0"
 LoopVectorization = "0.12.118"
+Makie = "0.19"
 MPI = "0.20"
 MuladdMacro = "0.2.2"
 Octavian = "0.3.5"

ext/TrixiMakieExt.jl

@@ -0,0 +1,18 @@
+# Package extension for adding Makie-based features to Trixi.jl
+module TrixiMakieExt
+
+# Required for visualization code
+using Makie: Makie, GeometryBasics
+
+# Use all exported symbols to avoid having to rewrite `recipes_makie.jl`
+using Trixi
+
+# Use additional symbols that are not exported
+using Trixi: PlotData2DTriangulated, TrixiODESolution, PlotDataSeries, ScalarData, @muladd
+
+# Import functions such that they can be extended with new methods
+import Trixi: iplot, iplot!
+
+include("../src/visualization/recipes_makie.jl")
+
+end

src/Trixi.jl

@@ -247,6 +247,11 @@ export ViscousFormulationBassiRebay1, ViscousFormulationLocalDG
 # Visualization-related exports
 export PlotData1D, PlotData2D, ScalarPlotData2D, getmesh, adapt_to_mesh_level!, adapt_to_mesh_level
 
+# Until Julia v1.9 is the minimum required version for Trixi.jl, we still support Requires.jl
+@static if VERSION >= v"1.10.0-DEV.1288" || VERSION >= v"1.9.1"
+  export iplot, iplot!
+end
+
 function __init__()
   init_mpi()
 
@@ -257,10 +262,13 @@ function __init__()
     using .Plots: Plots
   end
 
-  @require Makie="ee78f7c6-11fb-53f2-987a-cfe4a2b5a57a" begin
-    include("visualization/recipes_makie.jl")
-    using .Makie: Makie, GeometryBasics
-    export iplot, iplot! # interactive plot
+  # Until Julia v1.9 is the minimum required version for Trixi.jl, we still support Requires.jl
+  @static if VERSION < v"1.10.0-DEV.1288" && VERSION < v"1.9.1"
+    @require Makie="ee78f7c6-11fb-53f2-987a-cfe4a2b5a57a" begin
+      include("visualization/recipes_makie.jl")
+      using .Makie: Makie, GeometryBasics
+      export iplot, iplot! # interactive plot
+    end
   end
 
   @require Flux="587475ba-b771-5e3f-ad9e-33799f191a9c" begin

src/visualization/visualization.jl

@@ -8,4 +8,12 @@ include("types.jl")
 include("utilities.jl")
 include("recipes_plots.jl")
 
+# Until Julia v1.9 is the minimum required version for Trixi.jl, we still support Requires.jl
+@static if VERSION >= v"1.10.0-DEV.1288" || VERSION >= v"1.9.1"
+  # Add function definitions here such that they can be exported from Trixi.jl and extended in the
+  # TrixiMakieExt package extension
+  function iplot end
+  function iplot! end
+end
+
 end # @muladd