Guard against keymap errors during initialization

appveyor.yml

@@ -28,10 +28,6 @@ notifications:
 install:
   - ps: iex ((new-object net.webclient).DownloadString("https://raw.githubusercontent.com/JuliaCI/Appveyor.jl/version-1/bin/install.ps1"))
 
-# HeaderREPLs isn't registered yet
-before_build:
-  - C:\julia\bin\julia -e "using Pkg; Pkg.add(Pkg.REPLMode.parse_package(\"https://github.com/timholy/HeaderREPLs.jl\"; add_or_develop=true))"
-
 build_script:
   - echo "%JL_BUILD_SCRIPT%"
   - C:\julia\bin\julia -e "%JL_BUILD_SCRIPT%"

src/Rebugger.jl

@@ -54,7 +54,15 @@ function rebugrepl_init(main_repl, repl_inited)
 end
 
 function __init__()
-    schedule(Task(rebugrepl_init))
+    # schedule(Task(rebugrepl_init))
+    task = Task() do
+        try
+            rebugrepl_init()
+        catch exception
+            @error "Rebugger initialization failed" exception=(exception, catch_backtrace())
+        end
+    end
+    schedule(task)
 end
 
 include("precompile.jl")

src/ui.jl

@@ -447,7 +447,7 @@ function HeaderREPLs.setup_prompt(repl::HeaderREPL{InterpretHeader}, hascolor::B
     prompt.on_done = HeaderREPLs.respond(repl, julia_prompt) do str
         return DummyAST()
     end
-    return prompt, :rebug
+    return prompt, :interpret
 end
 
 function HeaderREPLs.append_keymaps!(keymaps, repl::HeaderREPL{InterpretHeader})
@@ -496,19 +496,30 @@ function add_keybindings(main_repl; override::Bool=false, kwargs...)
         if haskey(keybindings, action)
             keybindings[action] = keybinding
         end
+        # PackageCompiler can cause these keys to be added twice (once during compilation and once by __init__),
+        # so put these in a try/catch (issue #62)
         if action == :interpret
-            LineEdit.add_nested_key!(julia_prompt.keymap_dict, keybinding, modeswitches[action], override=override)
+            try
+                LineEdit.add_nested_key!(julia_prompt.keymap_dict, keybinding, modeswitches[action], override=override)
+            catch
+            end
         else
             # We need Any here because "cannot convert REPL.LineEdit.PrefixHistoryPrompt to an object of type REPL.LineEdit.Prompt"
             prompts = Any[julia_prompt, rebug_prompt]
             if action == :stacktrace push!(prompts, history_prompt) end
             for prompt in prompts
                 if keybinding isa Vector
                     for kb in keybinding
-                        LineEdit.add_nested_key!(prompt.keymap_dict, kb, modeswitches[action], override=override)
+                        try
+                            LineEdit.add_nested_key!(prompt.keymap_dict, kb, modeswitches[action], override=override)
+                        catch
+                        end
                     end
                 else
-                    LineEdit.add_nested_key!(prompt.keymap_dict, keybinding, modeswitches[action], override=override)
+                    try
+                        LineEdit.add_nested_key!(prompt.keymap_dict, keybinding, modeswitches[action], override=override)
+                    catch
+                    end
                 end
             end
         end