Fix AbstractMCMC 5 compatibility

Project.toml

@@ -1,6 +1,6 @@
 name = "Turing"
 uuid = "fce5fe82-541a-59a6-adf8-730c64b5f9a0"
-version = "0.30.0"
+version = "0.30.1"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"
@@ -46,7 +46,7 @@ TuringOptimExt = "Optim"
 
 [compat]
 ADTypes = "0.2"
-AbstractMCMC = "4, 5"
+AbstractMCMC = "5"
 AdvancedHMC = "0.3.0, 0.4.0, 0.5.2, 0.6"
 AdvancedMH = "0.8"
 AdvancedPS = "0.5.4"

src/mcmc/emcee.jl

@@ -25,7 +25,7 @@ function AbstractMCMC.step(
     model::Model,
     spl::Sampler{<:Emcee};
     resume_from = nothing,
-    init_params = nothing,
+    initial_params = nothing,
     kwargs...
 )
     if resume_from !== nothing
@@ -38,11 +38,11 @@ function AbstractMCMC.step(
     vis = [VarInfo(rng, model, SampleFromPrior()) for _ in 1:n]
 
     # Update the parameters if provided.
-    if init_params !== nothing
-        length(init_params) == n || throw(
+    if initial_params !== nothing
+        length(initial_params) == n || throw(
             ArgumentError("initial parameters have to be specified for each walker")
         )
-        vis = map(vis, init_params) do vi, init
+        vis = map(vis, initial_params) do vi, init
             vi = DynamicPPL.initialize_parameters!!(vi, init, spl, model)
 
             # Update log joint probability.

src/mcmc/hmc.jl

@@ -132,7 +132,7 @@ function DynamicPPL.initialstep(
     model::AbstractModel,
     spl::Sampler{<:Hamiltonian},
     vi::AbstractVarInfo;
-    init_params=nothing,
+    initial_params=nothing,
     nadapts=0,
     kwargs...
 )
@@ -164,11 +164,11 @@ function DynamicPPL.initialstep(
 
     # If no initial parameters are provided, resample until the log probability
     # and its gradient are finite.
-    if init_params === nothing
+    if initial_params === nothing
         init_attempt_count = 1
         while !isfinite(z)
             if init_attempt_count == 10
-                @warn "failed to find valid initial parameters in $(init_attempt_count) tries; consider providing explicit initial parameters using the `init_params` keyword"
+                @warn "failed to find valid initial parameters in $(init_attempt_count) tries; consider providing explicit initial parameters using the `initial_params` keyword"
             end
 
             # NOTE: This will sample in the unconstrained space.

test/Project.toml

@@ -32,7 +32,7 @@ Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [compat]
-AbstractMCMC = "4, 5"
+AbstractMCMC = "5"
 AdvancedMH = "0.6, 0.7, 0.8"
 AdvancedPS = "0.5.4"
 AdvancedVI = "0.2"

test/mcmc/emcee.jl

@@ -25,18 +25,18 @@
         nwalkers = 250
         spl = Emcee(nwalkers, 2.0)
 
-        # No initial parameters, with im- and explicit `init_params=nothing`
+        # No initial parameters, with im- and explicit `initial_params=nothing`
         Random.seed!(1234)
         chain1 = sample(gdemo_default, spl, 1)
         Random.seed!(1234)
-        chain2 = sample(gdemo_default, spl, 1; init_params=nothing)
+        chain2 = sample(gdemo_default, spl, 1; initial_params=nothing)
         @test Array(chain1) == Array(chain2)
 
         # Initial parameters have to be specified for every walker
-        @test_throws ArgumentError sample(gdemo_default, spl, 1; init_params=[2.0, 1.0])
+        @test_throws ArgumentError sample(gdemo_default, spl, 1; initial_params=[2.0, 1.0])
 
         # Initial parameters
-        chain = sample(gdemo_default, spl, 1; init_params=fill([2.0, 1.0], nwalkers))
+        chain = sample(gdemo_default, spl, 1; initial_params=fill([2.0, 1.0], nwalkers))
         @test chain[:s] == fill(2.0, 1, nwalkers)
         @test chain[:m] == fill(1.0, 1, nwalkers)
     end

test/mcmc/hmc.jl

@@ -232,7 +232,7 @@
 
     @turing_testset "warning for difficult init params" begin
         attempt = 0
-        @model function demo_warn_init_params()
+        @model function demo_warn_initial_params()
             x ~ Normal()
             if (attempt += 1) < 30
                 Turing.@addlogprob! -Inf
@@ -241,9 +241,9 @@
 
         @test_logs (
             :warn,
-            "failed to find valid initial parameters in 10 tries; consider providing explicit initial parameters using the `init_params` keyword",
+            "failed to find valid initial parameters in 10 tries; consider providing explicit initial parameters using the `initial_params` keyword",
         ) (:info,) match_mode=:any begin
-            sample(demo_warn_init_params(), NUTS(; adtype=adbackend), 5)
+            sample(demo_warn_initial_params(), NUTS(; adtype=adbackend), 5)
         end
     end
 end