unix/main: Use standard pyexec REPL for unix and windows ports.

This improves REPL usage consistency across ports, by utilizing the pyexec
code for the unix REPL.

Only enabled when MICROPY_USE_READLINE == 1 (the default).

Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>

shared/runtime/pyexec.c

@@ -37,6 +37,7 @@
 #include "py/mphal.h"
 #include "shared/readline/readline.h"
 #include "shared/runtime/pyexec.h"
+#include "extmod/modplatform.h"
 #include "genhdr/mpversion.h"
 
 pyexec_mode_kind_t pyexec_mode_kind = PYEXEC_MODE_FRIENDLY_REPL;
@@ -103,6 +104,14 @@ static int parse_compile_execute(const void *source, mp_parse_input_kind_t input
             // source is a lexer, parse and compile the script
             qstr source_name = lex->source_name;
             mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
+            #if defined(MICROPY_UNIX_COVERAGE)
+            // allow to print the parse tree in the coverage build
+            if (mp_verbose_flag >= 3) {
+                printf("----------------\n");
+                mp_parse_node_print(&mp_plat_print, parse_tree.root, 0);
+                printf("----------------\n");
+            }
+            #endif
             module_fun = mp_compile(&parse_tree, source_name, exec_flags & EXEC_FLAG_IS_REPL);
             #else
             mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("script compilation not supported"));