patch model&rpc (#207)

* change column to read from information_schema

* reactor generate mode from datasource

* reactor generate mode from datasource

* add primary key check logic

* resolve rebase conflicts

* add naming style

* add filename test case

* resolve rebase conflicts

* reactor test

* add test case

* change shell script to makefile

* update rpc new

* update gen_test.go

* format code

* format code

* update test

* generates alias

tools/goctl/rpc/generator/filename_test.go

@@ -0,0 +1,17 @@
+package generator
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFormatFilename(t *testing.T) {
+	assert.Equal(t, "abc", formatFilename("a_b_c", namingLower))
+	assert.Equal(t, "ABC", formatFilename("a_b_c", namingCamel))
+	assert.Equal(t, "a_b_c", formatFilename("a_b_c", namingSnake))
+	assert.Equal(t, "a", formatFilename("a", namingSnake))
+	assert.Equal(t, "A", formatFilename("a", namingCamel))
+	// no flag to convert to snake
+	assert.Equal(t, "abc", formatFilename("abc", namingSnake))
+}