Add a runner for wasi

script/wasi.py

@@ -0,0 +1,32 @@
+import argparse
+import sys
+
+import pywasm
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--version', '-v', action='version', version=f'pywasm {pywasm.version}')
+parser.add_argument('--preview1', action='store_true', default=True, help='use wasi preview1')
+parser.add_argument('file', help='wasm file to run')
+parser.add_argument('args', nargs='*', help='arg0 arg1 ... dir0:dir0 dir1:dir1 ... env0=val0 env1=val1 ... ')
+args = parser.parse_args()
+
+wasi_args = [args.file]
+wasi_dirs = {}
+wasi_envs = {}
+for e in args.args:
+    if '=' in e:
+        spes = e.split('=', 1)
+        wasi_envs[spes[0]] = spes[1]
+        continue
+    if ':' in e:
+        spes = e.split(':', 1)
+        wasi_dirs[spes[0]] = spes[1]
+        continue
+    wasi_args.append(e)
+
+if args.preview1:
+    runtime = pywasm.core.Runtime()
+    wasi = pywasm.wasi.Preview1(wasi_args, wasi_dirs, wasi_envs)
+    wasi.bind(runtime)
+    exit = wasi.main(runtime, runtime.instance_from_file(args.file))
+    sys.exit(exit)