Hide plotting behind @requires

Author: kbarros

Project.toml

@@ -7,13 +7,13 @@ version = "0.1.0"
 CrystalInfoFramework = "6007d9b0-c6b2-11e8-0510-1d10e825f3f1"
 FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
 FilePaths = "8fc22ac5-c921-52a6-82fd-178b2807b824"
-GLMakie = "e9467ef8-e4e7-5192-8a1a-b1aee30e663a"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 OffsetArrays = "6fe1bfb0-de20-5000-8ca7-80f57d26f881"
 Parameters = "d96e819e-fc66-5662-9728-84c9c7592b0a"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 ProgressMeter = "92933f4c-e287-5a05-a399-4b506db050ca"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 Spglib = "f761d5c5-86db-4880-b97f-9680a7cccfb5"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"

src/Sunny.jl

@@ -2,6 +2,7 @@
 
 module Sunny
 
+using Requires
 using LinearAlgebra
 using StaticArrays
 using OffsetArrays
@@ -17,15 +18,6 @@ using FilePaths: Path
 using CrystalInfoFramework
 import Spglib
 
-# Make best effort to determine if this is a headless machine -- A non-Apple
-# Unix (e.g. Linux) without the DISPLAY environment variable set.
-const _headless = Sys.isunix() && !Sys.isapple() && !haskey(ENV, "DISPLAY")
-@static _headless ? (
-    check_graphics_available() = error("Graphics functions are unavailable on a headless machine.")
-) : (
-    using GLMakie; check_graphics_available() = nothing
-)
-
 # TODO: Remove in Julia 1.7
 using Parameters: @unpack
 
@@ -73,15 +65,20 @@ include("StructureFactors.jl")
 export StructureFactor, update!, apply_dipole_factor, zero!
 export dynamic_structure_factor, static_structure_factor
 
-include("Plotting.jl")
-export plan_spintraj_fft!
-export plot_lattice, plot_spins, plot_bonds, plot_all_bonds
-export anim_integration, live_integration, live_langevin_integration
 
 include("WangLandau/BinnedArray.jl")
 export BinnedArray, filter_visited, reset!
 
 include("WangLandau/WangLandau.jl")
 export WangLandau, spherical_cap_update, init_bounded!, run!
 
+function __init__()
+    @require GLMakie="e9467ef8-e4e7-5192-8a1a-b1aee30e663a" begin
+        include("Plotting.jl")
+        export plan_spintraj_fft!
+        export plot_lattice, plot_spins, plot_bonds, plot_all_bonds
+        export anim_integration, live_integration, live_langevin_integration
+    end
+end
+
 end