Add p [var] commands to print all or just one frame local variable

README.md

@@ -71,6 +71,9 @@ Querying:
 - `st`: show the "status" (current function, source code and current expression to run)
 - `bt`: show a backtrace
 - `fr [i::Int]`: show all variables in the current or `i`th frame
+- `p`
+    - `p`: print all currently defined variables
+    - `p x` : print the value of the variable `x`
 
 Evaluation:
 - `w`

src/commands.jl

@@ -1,4 +1,3 @@
-
 function assert_allow_step(state)
     if state.broke_on_error
         printstyled(stderr, "Cannot step after breaking on error\n"; color=Base.error_color())
@@ -140,6 +139,26 @@ function execute_command(state::DebuggerState, v::Union{Val{:up}, Val{:down}}, c
     end
     return execute_command(state, Val(:f), string("f ", state.level + offset))
 end
+
+function execute_command(state::DebuggerState, ::Val{:p}, cmd::AbstractString)
+    cmds = split(cmd, r" +")
+    io = Base.pipe_writer(state.terminal)
+    frame = active_frame(state)
+    if length(cmds) == 1
+        print_locals(io, frame)
+    else
+        vars = JuliaInterpreter.locals(frame)
+        for requested_var in cmds[2:end]
+            for var in vars
+                if string(var.name) == requested_var
+                    print_var(io, var)
+                end
+            end
+        end
+    end
+    return false
+end
+
 function execute_command(state::DebuggerState, ::Val{:w}, cmd::AbstractString)
     # TODO show some info messages?
     cmds = split(cmd, r" +")
@@ -269,6 +288,9 @@ function execute_command(state::DebuggerState, ::Union{Val{:help}, Val{:?}}, cmd
             - `st`: show the "status" (current function, source code and current expression to run)\\
             - `bt`: show a backtrace\\
             - `fr [i::Int]`: show all variables in the current or `i`th frame\\
+            - `p`\\
+                - `p`: print all currently defined variables\\
+                - `p x` : print the value of the variable `x`\\
 
 
             Evaluation:\\