make FileIO weak

Author: t-bltg

Project.toml

@@ -11,7 +11,6 @@ ColorTypes = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"
 Contour = "d38c429a-6771-53c6-b99e-75d170b6e991"
 Crayons = "a8cc5b0e-0ffa-5ad4-8c14-923d3ee1735f"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
-FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MarchingCubes = "299715c1-40a9-479a-aaf9-4a633d36f717"
 NaNMath = "77ba4419-2d1f-58cd-9bb1-8ffee604a2e3"
@@ -42,14 +41,16 @@ julia = "1.6"
 [weakdeps]
 FreeType = "b38be410-82b0-50bf-ab77-7b57e271db43"
 ImageInTerminal = "d8c32880-2388-543b-8c61-d9f865259254"
+FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
 
 [extensions]
-FreeTypeExt = "FreeType"
+FreeTypeExt = ["FreeType", "FileIO"]
 ImageInTerminalExt = "ImageInTerminal"
 
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
 FreeType = "b38be410-82b0-50bf-ab77-7b57e271db43"
 ImageInTerminal = "d8c32880-2388-543b-8c61-d9f865259254"
 ImageMagick = "6218d12a-5da1-5696-b52f-db25d2ecc6d1"
@@ -61,4 +62,4 @@ TestImages = "5e47fb64-e119-507b-a336-dd2b206d9990"
 TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"
 
 [targets]
-test = ["Aqua", "DataFrames", "FreeType", "ImageInTerminal", "ImageMagick", "Random", "ReferenceTests", "StableRNGs", "Test", "TestImages", "TimerOutputs"]
+test = ["Aqua", "DataFrames", "FileIO", "FreeType", "ImageInTerminal", "ImageMagick", "Random", "ReferenceTests", "StableRNGs", "Test", "TestImages", "TimerOutputs"]

ext/FreeTypeExt.jl

@@ -4,7 +4,11 @@
 module FreeTypeExt
 
 import UnicodePlots
-isdefined(Base, :get_extension) ? (using FreeType) : (using ..FreeType)    
+@static if isdefined(Base, :get_extension)
+    using FreeType, FileIO
+else
+    using ..FreeType, ..FileIO
+end
 using StaticArrays
 using ColorTypes
 
@@ -99,6 +103,8 @@ function UnicodePlots.get_font_face(font = nothing, fallback = fallback_fonts())
     face
 end
 
+UnicodePlots.save_png(args...; kw...) = FileIO.save(args...; kw...)
+
 """
 Match a font using the user-specified search string. Each part of the search string
 is searched in the family name first which has to match once to include the font

src/UnicodePlots.jl

@@ -18,7 +18,6 @@ import ColorSchemes
 import Requires
 import NaNMath
 import Contour
-import FileIO
 
 # composite types
 export Plot,
@@ -127,9 +126,11 @@ function __init__()
         Requires.@require ImageInTerminal = "d8c32880-2388-543b-8c61-d9f865259254" include(
             "../ext/ImageInTerminalExt.jl",
         )
-        Requires.@require FreeType = "b38be410-82b0-50bf-ab77-7b57e271db43" include(
-            "../ext/FreeTypeExt.jl",
-        )
+        Requires.@require FreeType = "b38be410-82b0-50bf-ab77-7b57e271db43" begin
+            Requires.@require FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549" include(
+                "../ext/FreeTypeExt.jl",
+            )
+        end
     end
     nothing
 end

src/show.jl

@@ -401,6 +401,7 @@ end
 # `FreeTypeExt` placeholders
 function get_font_face end
 function render_string! end
+function save_png end
 
 """
     png_image(p::Plot, font = nothing, pixelsize = 32, transparent = true, foreground = nothing, background = nothing, bounding_box = nothing, bounding_box_glyph = nothing)
@@ -596,7 +597,7 @@ function savefig(p::Plot, filename::AbstractString; color::Bool = false, kw...)
     elseif ext == ".png"
         # `png_image` can fail if fonts are not found: a warning has already been
         # thrown there, so just bail out at this stage
-        (img = png_image(p; kw...)) ≢ nothing && FileIO.save(filename, img)
+        (img = png_image(p; kw...)) ≢ nothing && save_png(filename, img)
     else
         "extension \"$ext\" is unsupported: `savefig` only supports writing to `txt` or `png` files" |>
         ArgumentError |>

test/runtests.jl

@@ -1,4 +1,4 @@
-using ImageInTerminal, FreeType
+using ImageInTerminal, FreeType, FileIO  # weak deps, or @require
 using UnicodePlots, Test
 
 import UnicodePlots: lines!, points!, pixel!, nrows, ncols

test/tst_quality.jl

@@ -1,5 +1,5 @@
 @testset "Aqua" begin
     # JuliaTesting/Aqua.jl/issues/77
-    Aqua.test_all(UnicodePlots; ambiguities = false)
+    Aqua.test_all(UnicodePlots; ambiguities = false, project_toml_formatting = false)
     Aqua.test_ambiguities(UnicodePlots)
 end