Fix permission, showcase config in access logger

Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>

data/extension/init/templates/tinygo/envoy.access_loggers/default/main.go

@@ -40,7 +40,7 @@ func (l *accessLogger) OnLog() {
 		return
 	}
 
-	proxywasm.LogInfof("OnLog: :path = %s", hdr)
+	proxywasm.LogInfof(":path = %s", hdr)
 	proxywasm.LogInfof("message = %s", l.logMessage)
 
 }

data/extension/init/templates/tinygo/envoy.access_loggers/default/main_test.go

@@ -10,18 +10,27 @@ import (
 )
 
 func TestAccessLogger_OnLog(t *testing.T) {
+	configuration := `this is my log message`
 	opt := proxytest.NewEmulatorOption().
-		WithNewRootContext(newAccessLogger)
+		WithNewRootContext(newAccessLogger).
+		WithPluginConfiguration([]byte(configuration))
+
 	host := proxytest.NewHostEmulator(opt)
 	// Release the host emulation lock so that other test cases can insert their own host emulation.
 	defer host.Done()
 
+	// Call OnPluginStart -> the message field of root context is configured.
+	status := host.StartPlugin()
+	// Check the status returned by OnPluginStart is OK.
+	require.Equal(t, types.OnPluginStartStatusOK, status)
+
 	// Call OnLog with the given headers.
 	host.CallOnLogForAccessLogger(types.Headers{
 		{":path", "/this/is/path"},
 	}, nil)
 
 	// Check the Envoy logs.
 	logs := host.GetLogs(types.LogLevelInfo)
-	require.Contains(t, logs, "OnLog: :path = /this/is/path")
+	require.Contains(t, logs, ":path = /this/is/path")
+	require.Contains(t, logs, "message = this is my log message")
 }

images/extension-builders/tinygo/commands.sh

@@ -18,14 +18,14 @@ extension_build()  {
 	tinygo build -o "$1" -scheduler=none -target wasi main.go
 	# This is necessary since the created go caches are with read-only permission,
 	# and without this, the host user cannot delete the build directory with "rm -rf".
-	chmod -R a+rw build/
+	chmod -R u+rw build/
 }
 
 extension_test()  {
 	go test -tags=proxytest -v ./...
 	# This is necessary since the created go caches are with read-only permission,
 	# and without this, the host user cannot delete the build directory with "rm -rf".
-	chmod -R a+rw build/
+	chmod -R u+rw build/
 }
 
 extension_clean()  {