feat: add fields with logx methods, support using third party logging libs. (#1847)

* backup

* simplify

* chore: remove unused pool

* chore: fix lint errors

* chore: use strings.Builder instead of bytes.Buffer

* test: add more tests

* chore: fix reviewdog

* test: fix data race

* feat: make logger customizable

* chore: fix reviewdog

* test: fix fails

* chore: fix set writer twice

* chore: use context instead of golang.org context

* chore: specify uint32 for level types

core/logx/util_test.go

@@ -0,0 +1,72 @@
+package logx
+
+import (
+	"path/filepath"
+	"runtime"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetCaller(t *testing.T) {
+	_, file, _, _ := runtime.Caller(0)
+	assert.Contains(t, getCaller(1), filepath.Base(file))
+	assert.True(t, len(getCaller(1<<10)) == 0)
+}
+
+func TestGetTimestamp(t *testing.T) {
+	ts := getTimestamp()
+	tm, err := time.Parse(timeFormat, ts)
+	assert.Nil(t, err)
+	assert.True(t, time.Since(tm) < time.Minute)
+}
+
+func TestPrettyCaller(t *testing.T) {
+	tests := []struct {
+		name string
+		file string
+		line int
+		want string
+	}{
+		{
+			name: "regular",
+			file: "logx_test.go",
+			line: 123,
+			want: "logx_test.go:123",
+		},
+		{
+			name: "relative",
+			file: "adhoc/logx_test.go",
+			line: 123,
+			want: "adhoc/logx_test.go:123",
+		},
+		{
+			name: "long path",
+			file: "github.com/zeromicro/go-zero/core/logx/util_test.go",
+			line: 12,
+			want: "logx/util_test.go:12",
+		},
+		{
+			name: "local path",
+			file: "/Users/kevin/go-zero/core/logx/util_test.go",
+			line: 1234,
+			want: "logx/util_test.go:1234",
+		},
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			assert.Equal(t, test.want, prettyCaller(test.file, test.line))
+		})
+	}
+}
+
+func BenchmarkGetCaller(b *testing.B) {
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		getCaller(1)
+	}
+}