Remove abandoned tooling code (#3171)

This function and its use are now hosed in the
opentelemetry-go-build-tools project.

Co-authored-by: Chester Cheung <cheung.zhy.csu@gmail.com>

internal/tools/common.go

@@ -1,124 +0,0 @@
-// Copyright The OpenTelemetry Authors
-//
-// 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 tools provides helper functions used in scripts within the
-// internal/tools module, as well as imports needed for a build with the
-// "tools" build tag.
-package tools // import "go.opentelemetry.io/otel/internal/tools"
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"sort"
-	"strings"
-	"text/tabwriter"
-
-	"golang.org/x/mod/modfile"
-)
-
-// Repo represents a git repository.
-type Repo string
-
-// FindRepoRoot retrieves the root of the repository containing the current
-// working directory. Beginning at the current working directory (dir), the
-// algorithm checks if joining the ".git" suffix, such as "dir.get", is a
-// valid file. Otherwise, it will continue checking the dir's parent directory
-// until it reaches the repo root or returns an error if it cannot be found.
-func FindRepoRoot() (Repo, error) {
-	start, err := os.Getwd()
-	if err != nil {
-		return "", err
-	}
-
-	dir := start
-	for {
-		_, err := os.Stat(filepath.Join(dir, ".git"))
-		if errors.Is(err, os.ErrNotExist) {
-			dir = filepath.Dir(dir)
-			// From https://golang.org/pkg/path/filepath/#Dir:
-			// The returned path does not end in a separator unless it is the root directory.
-			if strings.HasSuffix(dir, string(filepath.Separator)) {
-				return "", fmt.Errorf("unable to find git repository enclosing working dir %s", start)
-			}
-			continue
-		}
-
-		if err != nil {
-			return "", err
-		}
-
-		return Repo(dir), nil
-	}
-}
-
-// FindModules returns all Go modules contained in Repo r.
-func (r Repo) FindModules() ([]*modfile.File, error) {
-	var results []*modfile.File
-	err := filepath.Walk(string(r), func(path string, info os.FileInfo, walkErr error) error {
-		if walkErr != nil {
-			// Walk failed to walk into this directory. Stop walking and
-			// signal this error.
-			return walkErr
-		}
-
-		if !info.IsDir() {
-			return nil
-		}
-
-		goMod := filepath.Join(path, "go.mod")
-		f, err := os.Open(goMod)
-		if errors.Is(err, os.ErrNotExist) {
-			return nil
-		}
-		if err != nil {
-			return err
-		}
-
-		var b bytes.Buffer
-		io.Copy(&b, f)
-		if err = f.Close(); err != nil {
-			return err
-		}
-
-		mFile, err := modfile.Parse(goMod, b.Bytes(), nil)
-		if err != nil {
-			return err
-		}
-		results = append(results, mFile)
-		return nil
-	})
-
-	sort.SliceStable(results, func(i, j int) bool {
-		return results[i].Syntax.Name < results[j].Syntax.Name
-	})
-
-	return results, err
-}
-
-func PrintModFiles(w io.Writer, mFiles []*modfile.File) error {
-	tw := tabwriter.NewWriter(w, 0, 0, 1, ' ', 0)
-	if _, err := fmt.Fprintln(tw, "FILE PATH\tIMPORT PATH"); err != nil {
-		return err
-	}
-	for _, m := range mFiles {
-		if _, err := fmt.Fprintf(tw, "%s\t%s\n", m.Syntax.Name, m.Module.Mod.Path); err != nil {
-			return err
-		}
-	}
-	return tw.Flush()
-}

internal/tools/go.mod

@@ -13,7 +13,6 @@ require (
 	go.opentelemetry.io/build-tools/dbotconf v0.0.0-20220706175322-58de0d25b85c
 	go.opentelemetry.io/build-tools/multimod v0.0.0-20220706175322-58de0d25b85c
 	go.opentelemetry.io/build-tools/semconvgen v0.0.0-20220706175322-58de0d25b85c
-	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4
 	golang.org/x/tools v0.1.12
 )
 
@@ -182,6 +181,7 @@ require (
 	go.uber.org/zap v1.21.0 // indirect
 	golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
 	golang.org/x/exp/typeparams v0.0.0-20220613132600-b0d781184e0d // indirect
+	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
 	golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
 	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 // indirect
 	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect