Move fixture generation to contrib and add test (#10277)

* Add fixture gen tool and fix "access" test

* Close file before exiting

* Add missing repo_unit for repo id: 5

* Fix count on TestAPIOrgRepos

* Generate access fixture from contrib and add test

* Remove old access fixture generation

* Fix lint

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

contrib/fixtures/fixture_generation.go

@@ -0,0 +1,76 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"code.gitea.io/gitea/models"
+)
+
+// To generate derivative fixtures, execute the following from Gitea's repository base dir:
+// go run -tags 'sqlite sqlite_unlock_notify' contrib/fixtures/fixture_generation.go [fixture...]
+
+var (
+	generators = []struct {
+		gen  func() (string, error)
+		name string
+	}{
+		{
+			models.GetYamlFixturesAccess, "access",
+		},
+	}
+	fixturesDir string
+)
+
+func main() {
+	pathToGiteaRoot := "."
+	fixturesDir = filepath.Join(pathToGiteaRoot, "models", "fixtures")
+	if err := models.CreateTestEngine(fixturesDir); err != nil {
+		fmt.Printf("CreateTestEngine: %+v", err)
+		os.Exit(1)
+	}
+	if err := models.PrepareTestDatabase(); err != nil {
+		fmt.Printf("PrepareTestDatabase: %+v\n", err)
+		os.Exit(1)
+	}
+	if len(os.Args) == 0 {
+		for _, r := range os.Args {
+			if err := generate(r); err != nil {
+				fmt.Printf("generate '%s': %+v\n", r, err)
+				os.Exit(1)
+			}
+		}
+	} else {
+		for _, g := range generators {
+			if err := generate(g.name); err != nil {
+				fmt.Printf("generate '%s': %+v\n", g.name, err)
+				os.Exit(1)
+			}
+		}
+	}
+}
+
+func generate(name string) error {
+	for _, g := range generators {
+		if g.name == name {
+			data, err := g.gen()
+			if err != nil {
+				return err
+			}
+			path := filepath.Join(fixturesDir, name+".yml")
+			if err := ioutil.WriteFile(path, []byte(data), 0644); err != nil {
+				return fmt.Errorf("%s: %+v", path, err)
+			}
+			fmt.Printf("%s created.\n", path)
+			return nil
+		}
+	}
+
+	return fmt.Errorf("generator not found")
+}