skip precompilation if Gtk4 fails to initialize (#241)

Author: jwahlstrand

Project.toml

@@ -1,7 +1,7 @@
 name = "ProfileView"
 uuid = "c46f51b8-102a-5cf2-8d2c-8597cb0e0da7"
 author = ["Tim Holy <[email protected]>"]
-version = "1.9.0"
+version = "1.9.1"
 
 [deps]
 Cairo = "159f3aea-2a34-519c-b102-8c37f9878175"
@@ -34,7 +34,7 @@ Cthulhu = "2"
 FileIO = "1.6"
 FlameGraphs = "0.2.10, 1"
 Graphics = "0.4, 1"
-Gtk4 = "0.5, 0.6, 0.7"
+Gtk4 = "0.7.6"
 GtkObservables = "2"
 InteractiveUtils = "1"
 IntervalSets = "0.2, 0.3, 0.4, 0.5, 0.6, 0.7"

src/ProfileView.jl

@@ -574,6 +574,9 @@ function __init__()
             printstyled(io, "\n`using Cthulhu` is required for `$(exc.f)`"; color=:yellow)
         end
     end
+    if !Gtk4.initialized[]
+        error("Gtk4 not initialized")
+    end
     # by default GtkFrame uses rounded corners
     css="""
         .squared {border-radius: 0;}
@@ -607,6 +610,10 @@ let
         @compile_workload begin
             g = flamegraph(backtraces; lidict=lidict)
             gdict = Dict(tabname_allthreads => Dict(tabname_alltasks => g))
+            if !Gtk4.initialized[]
+                @warn("ProfileView precompile skipped: Gtk4 could not be initialized (are you on a headless system?)")
+                return
+            end
             win, c, fdraw = viewgui(FlameGraphs.default_colors, gdict)
             for obs in c.preserved
                 if isa(obs, Observable) || isa(obs, Observables.ObserverFunction)