From 26c845daad62cd4b42ad06e6853816c84ffe04ca Mon Sep 17 00:00:00 2001
From: Jason Song <i@wolfogre.com>
Date: Mon, 16 Jan 2023 10:56:16 +0800
Subject: [PATCH] feat: check for dependency level

---
 checks/dependencies.go | 53 ++++++++++++++++++++++++++++++++++++++++++
 main.go                |  1 +
 2 files changed, 54 insertions(+)
 create mode 100644 checks/dependencies.go

diff --git a/checks/dependencies.go b/checks/dependencies.go
new file mode 100644
index 0000000..e9a0f48
--- /dev/null
+++ b/checks/dependencies.go
@@ -0,0 +1,53 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package checks
+
+import (
+	"strings"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var Dependencies = &analysis.Analyzer{
+	Name: "dependencies",
+	Doc:  "check for dependency level",
+	Run:  runDependencies,
+}
+
+func runDependencies(pass *analysis.Pass) (interface{}, error) {
+	level := getLevel(pass.Pkg.Path())
+	if level == 0 {
+		return nil, nil
+	}
+	for _, file := range pass.Files {
+		for _, im := range file.Imports {
+			if getLevel(im.Path.Value) > level {
+				pass.Reportf(im.Pos(), "import %v", im.Path.Value)
+			}
+		}
+	}
+	return nil, nil
+}
+
+// See https://docs.gitea.io/zh-cn/guidelines-backend/#package-dependencies
+var dependencyLevels = map[string]int{
+	"code.gitea.io/gitea/cmd":      5,
+	"code.gitea.io/gitea/routers":  4,
+	"code.gitea.io/gitea/services": 3,
+	"code.gitea.io/gitea/models":   2,
+	"code.gitea.io/gitea/modules":  1,
+}
+
+func getLevel(pkg string) int {
+	pkg = strings.Trim(pkg, "\"")
+	if strings.HasSuffix(pkg, "/test") || strings.HasSuffix(pkg, "_test") {
+		return 0
+	}
+	for k, v := range dependencyLevels {
+		if strings.HasPrefix(pkg, k) {
+			return v
+		}
+	}
+	return 0
+}
diff --git a/main.go b/main.go
index 7baec19..2354e5e 100644
--- a/main.go
+++ b/main.go
@@ -15,5 +15,6 @@ func main() {
 		checks.License,
 		checks.Migrations,
 		checks.ModelsSession,
+		checks.Dependencies,
 	)
 }