Basic implementation of import.

import works for simple cases.  Still work to do on finding the right
script, and setting globals/locals correctly when running an imported
function.

1 files changed, 20 insertions, 0 deletions

diff --git a/py/lexerunix.c b/py/lexerunix.c
index 398cb792a7..14c28c16d9 100644
--- a/py/lexerunix.c
+++ b/py/lexerunix.c
@@ -58,3 +58,23 @@ mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
 
     return mp_lexer_new_from_str_len(filename, data, size, true);
 }
+
+/******************************************************************************/
+/* unix implementation of import                                              */
+
+// TODO properly!
+
+static const char *import_base_dir = NULL;
+
+void mp_import_set_directory(const char *dir) {
+    import_base_dir = dir;
+}
+
+mp_lexer_t *mp_import_open_file(qstr mod_name) {
+    vstr_t *vstr = vstr_new();
+    if (import_base_dir != NULL) {
+        vstr_printf(vstr, "%s/", import_base_dir);
+    }
+    vstr_printf(vstr, "%s.py", qstr_str(mod_name));
+    return mp_lexer_new_from_file(vstr_str(vstr)); // TODO does lexer need to copy the string? can we free it here?
+}