support env var to override adapter executable

adapters/wasm-micro-runtime.py

@@ -1,6 +1,9 @@
 import argparse
 import subprocess
 import sys
+import os
+
+IWASM=os.getenv('TEST_RUNTIME_EXE', 'iwasm')
 
 parser = argparse.ArgumentParser()
 parser.add_argument('--version', action='store_true')
@@ -12,12 +15,12 @@
 args = parser.parse_args()
 
 if args.version:
-    subprocess.run(['iwasm', '--version'])
+    subprocess.run([IWASM, '--version'])
     sys.exit(0)
 
 TEST_FILE=args.test_file
 PROG_ARGS=args.arg 
 ENV_ARGS=[f'--env={i}' for i in args.env]
 DIR_ARGS=[f'--dir={i}' for i in args.dir]
 
-sys.exit(subprocess.run(["iwasm"] + ENV_ARGS + DIR_ARGS + [TEST_FILE] + PROG_ARGS).returncode)
+sys.exit(subprocess.run([IWASM] + ENV_ARGS + DIR_ARGS + [TEST_FILE] + PROG_ARGS).returncode)

adapters/wasmtime.py

@@ -0,0 +1,26 @@
+import argparse
+import subprocess
+import sys
+import os
+
+WASMTIME=os.getenv('TEST_RUNTIME_EXE', 'wasmtime')
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--version', action='store_true')
+parser.add_argument('--test-file', action='store')
+parser.add_argument('--arg', action='append', default=[])
+parser.add_argument('--env', action='append', default=[])
+parser.add_argument('--dir', action='append', default=[])
+
+args = parser.parse_args()
+
+if args.version:
+    subprocess.run([WASMTIME, '--version'])
+    sys.exit(0)
+
+TEST_FILE=args.test_file
+PROG_ARGS=args.arg 
+ENV_ARGS=[j for i in args.env for j in ["--env", i]]
+DIR_ARGS=[j for i in args.dir for j in ["--dir", i]]
+
+sys.exit(subprocess.run([WASMTIME] + ENV_ARGS + DIR_ARGS + [TEST_FILE] + PROG_ARGS).returncode)