chore: import upstream snapshot with attribution

testing/go/benchmark/benchmark_folder.go

@@ -0,0 +1,100 @@
+// Copyright 2024 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/cockroachdb/errors"
+)
+
+var benchmarkFolder BenchmarkFolderLocation // benchmarkFolder is the disk location of the benchmark folder
+
+// BenchmarkFolderLocation is the location of this project's root folder.
+type BenchmarkFolderLocation struct {
+	path string
+}
+
+// GetBenchmarkFolder returns the location of the benchmark folder (scripts/mini_benchmark). This is used to find the
+// absolute position of our output files.
+func GetBenchmarkFolder() (BenchmarkFolderLocation, error) {
+	_, currentFileLocation, _, ok := runtime.Caller(0)
+	if !ok {
+		return BenchmarkFolderLocation{}, errors.Errorf("failed to fetch the location of the current file")
+	}
+	benchmarkFolder = BenchmarkFolderLocation{filepath.Clean(filepath.Join(filepath.Dir(currentFileLocation),
+		"../../../scripts/mini_sysbench"))}
+	return benchmarkFolder, nil
+}
+
+// MoveRoot returns a new BenchmarkFolderLocation that defines the root at the new path. The parameter should be
+// relative to the current root.
+func (root BenchmarkFolderLocation) MoveRoot(relativePath string) BenchmarkFolderLocation {
+	return BenchmarkFolderLocation{filepath.Clean(filepath.Join(root.path, relativePath))}
+}
+
+// GetAbsolutePath returns the absolute path of the given path, which should be relative to the project's root
+// folder.
+func (root BenchmarkFolderLocation) GetAbsolutePath(relativePath string) string {
+	return filepath.ToSlash(filepath.Join(root.path, relativePath))
+}
+
+// Exists returns whether the file or directory at the given path (relative to the root path) exists. Returns an error
+// if the check was unable to be completed.
+func (root BenchmarkFolderLocation) Exists(relativePath string) (bool, error) {
+	_, err := os.Stat(root.GetAbsolutePath(relativePath))
+	if os.IsNotExist(err) {
+		return false, nil
+	} else if err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+// ReadDir is equivalent to os.ReadDir, except that it uses the root path and the given relative path.
+func (root BenchmarkFolderLocation) ReadDir(relativePath string) ([]os.DirEntry, error) {
+	return os.ReadDir(root.GetAbsolutePath(relativePath))
+}
+
+// ReadFile is equivalent to os.ReadFile, except that it uses the root path and the given relative path.
+func (root BenchmarkFolderLocation) ReadFile(relativePath string) ([]byte, error) {
+	return os.ReadFile(root.GetAbsolutePath(relativePath))
+}
+
+// WriteFile is equivalent to os.WriteFile, except that it uses the root path and the given relative path.
+func (root BenchmarkFolderLocation) WriteFile(relativePath string, data []byte, perm os.FileMode) error {
+	directory := filepath.ToSlash(filepath.Dir(relativePath))
+	exists, err := root.Exists(directory)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		if err = os.MkdirAll(root.GetAbsolutePath(directory), 0644); err != nil {
+			return err
+		}
+	}
+	return os.WriteFile(root.GetAbsolutePath(relativePath), data, perm)
+}
+
+// init is used to load the location of the benchmark folder.
+func init() {
+	var err error
+	benchmarkFolder, err = GetBenchmarkFolder()
+	if err != nil {
+		panic(err)
+	}
+}