From 627b49b418716bf9c739cc52393c938ff62d9ca0 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Thu, 6 Jun 2019 23:28:15 -0300
Subject: [PATCH] add line-running and noop cmd

---
 examples/hello.scri   |  2 +-
 scritcher/executer.py | 28 ++++++++++++++++++++++++++++
 scritcher/main.py     | 21 +++++++++++++++++++--
 3 files changed, 48 insertions(+), 3 deletions(-)
 create mode 100644 scritcher/executer.py

diff --git a/examples/hello.scri b/examples/hello.scri
index e804f19..3583c5a 100644
--- a/examples/hello.scri
+++ b/examples/hello.scri
@@ -1 +1 @@
-noop
+noop;
diff --git a/scritcher/executer.py b/scritcher/executer.py
new file mode 100644
index 0000000..b1bd63b
--- /dev/null
+++ b/scritcher/executer.py
@@ -0,0 +1,28 @@
+import shlex
+
+
+class InterpreterError(Exception):
+    pass
+
+
+class Interpreter:
+    """Interpreter for scritcher instructions/statements."""
+    def __init__(self):
+        pass
+
+    def _cmd_noop(self):
+        pass
+
+    def run(self, line: str):
+        """Run a single line."""
+        print(f'running {line!r}')
+
+        args = shlex.split(line)
+        command = args[0]
+
+        try:
+            method = getattr(self, f'_cmd_{command}')
+        except AttributeError:
+            raise InterpreterError(f'Command {command!r} not found')
+
+        method(*args[1:])
diff --git a/scritcher/main.py b/scritcher/main.py
index f62051a..96d1b6f 100644
--- a/scritcher/main.py
+++ b/scritcher/main.py
@@ -1,11 +1,28 @@
 import sys
 from pathlib import Path
 
+from .executer import Interpreter, InterpreterError
+
 def main():
     try:
         scri_path = Path(sys.argv[1]).resolve()
     except IndexError:
         print(f'usage: {sys.argv[0]} path/to/file.scri')
         return
-    print('path', scri_path)
-    #run(scri_path)
+
+    full_text = scri_path.read_text()
+    full_text = full_text.replace('\n', '')
+    stmts = full_text.split(';')
+
+    interp = Interpreter()
+
+    try:
+        for stmt in stmts:
+            if not stmt:
+                continue
+
+            interp.run(stmt)
+    except InterpreterError as err:
+        print(f'Interpreter error. {err.args[0]!r}')
+
+    print('OK')