Is there a way to use AlphaZero.jl without using Plots.jl and Gr_jll?

[Swarnim Maheshwari]

Trying to import AlphaZero in google colab results in this:

[ Info: Precompiling AlphaZero [8ed9eb0b-7496-408d-8c8b-2119aeea02cd]
[ Info: Using the Flux implementation of AlphaZero.NetLib.
ERROR: LoadError: InitError: UndefVarError: GR_jll not defined
Stacktrace:
  [1] __init__()
    @ GR.GRPreferences ~/.julia/packages/GR/I1aTM/src/preferences.jl:50
  [2] _include_from_serialized(pkg::Base.PkgId, path::String, depmods::Vector{Any})
    @ Base ./loading.jl:831
  [3] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String, build_id::UInt64)
    @ Base ./loading.jl:1039
  [4] _require(pkg::Base.PkgId)
    @ Base ./loading.jl:1315
  [5] _require_prelocked(uuidkey::Base.PkgId)
    @ Base ./loading.jl:1200
  [6] macro expansion
    @ ./loading.jl:1180 [inlined]
  [7] macro expansion
    @ ./lock.jl:223 [inlined]
  [8] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:1144
  [9] top-level scope
    @ ~/.julia/packages/Plots/nuwp4/src/backends.jl:395
 [10] eval
    @ ./boot.jl:368 [inlined]
 [11] _initialize_backend(pkg::Plots.GRBackend)
    @ Plots ~/.julia/packages/Plots/nuwp4/src/backends.jl:394
 [12] backend(pkg::Plots.GRBackend)
    @ Plots ~/.julia/packages/Plots/nuwp4/src/backends.jl:260
 [13] backend(sym::Symbol)
    @ Plots ~/.julia/packages/Plots/nuwp4/src/backends.jl:270
 [14] load_default_backend()
    @ Plots ~/.julia/packages/Plots/nuwp4/src/backends.jl:201
 [15] backend()
    @ Plots ~/.julia/packages/Plots/nuwp4/src/backends.jl:248
 [16] top-level scope
    @ ~/.julia/packages/Plots/nuwp4/src/init.jl:123
 [17] include(mod::Module, _path::String)
    @ Base ./Base.jl:419
 [18] include(x::String)
    @ Plots ~/.julia/packages/Plots/nuwp4/src/Plots.jl:1
 [19] top-level scope
    @ ~/.julia/packages/Plots/nuwp4/src/Plots.jl:176
 [20] include
    @ ./Base.jl:419 [inlined]
 [21] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::String)
    @ Base ./loading.jl:1554
 [22] top-level scope
    @ stdin:1
during initialization of module GRPreferences
in expression starting at /root/.julia/packages/Plots/nuwp4/src/init.jl:123
in expression starting at /root/.julia/packages/Plots/nuwp4/src/Plots.jl:1
in expression starting at stdin:1
ERROR: LoadError: Failed to precompile Plots [91a5bcdd-55d7-5caf-9e0b-520d859cae80] to /root/.julia/compiled/v1.8/Plots/jl_s51kIN.
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:35
  [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, keep_loaded_modules::Bool)
    @ Base ./loading.jl:1707
  [3] compilecache
    @ ./loading.jl:1651 [inlined]
  [4] _require(pkg::Base.PkgId)
    @ Base ./loading.jl:1337
  [5] _require_prelocked(uuidkey::Base.PkgId)
    @ Base ./loading.jl:1200
  [6] macro expansion
    @ ./loading.jl:1180 [inlined]
  [7] macro expansion
    @ ./lock.jl:223 [inlined]
  [8] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:1144
  [9] include(mod::Module, _path::String)
    @ Base ./Base.jl:419
 [10] include(x::String)
    @ AlphaZero ~/.julia/packages/AlphaZero/3oiyX/src/AlphaZero.jl:6
 [11] top-level scope
    @ ~/.julia/packages/AlphaZero/3oiyX/src/AlphaZero.jl:160
 [12] include
    @ ./Base.jl:419 [inlined]
 [13] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::Nothing)
    @ Base ./loading.jl:1554
 [14] top-level scope
    @ stdin:1
in expression starting at /root/.julia/packages/AlphaZero/3oiyX/src/ui/ui.jl:1
in expression starting at /root/.julia/packages/AlphaZero/3oiyX/src/AlphaZero.jl:6
in expression starting at stdin:1
Failed to precompile AlphaZero [8ed9eb0b-7496-408d-8c8b-2119aeea02cd] to /root/.julia/compiled/v1.8/AlphaZero/jl_L5f97Q.

Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:35
 [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, keep_loaded_modules::Bool)
   @ Base ./loading.jl:1707
 [3] compilecache
   @ ./loading.jl:1651 [inlined]
 [4] _require(pkg::Base.PkgId)
   @ Base ./loading.jl:1337
 [5] _require_prelocked(uuidkey::Base.PkgId)
   @ Base ./loading.jl:1200
 [6] macro expansion
   @ ./loading.jl:1180 [inlined]
 [7] macro expansion
   @ ./lock.jl:223 [inlined]
 [8] require(into::Module, mod::Symbol)
   @ Base ./loading.jl:1144

Is there a way to use this program without these dependencies? It should be possible.

[Jonathan Laurent]

There is currently no option to do this but it should be fairly easy for you to implement.

Also, did you try

export GKSwstype=100  # To avoid an occasional GR bug

as I recommended in the README?

[Swarnim Maheshwari]

@jonathan-laurent I tried the solution given in the readme, but it did not work. run(`export GKSwstype=100`) gives IOError: could not spawn `export GKSwstype=100`: no such file or directory (ENOENT) However I tried ENV["GKSwstype"]="100" ; pkd.add("AlphaZero")
This actually removed the GR error however the GR_jll error persisted. The total error is here. Can you look at this PR, where I added that GR bug line in the official documentation?

Also changing Plots.jl backend should solve the issue, right?