internal: add supported versions for v2

.github/workflows/apps/gen_supported_versions_doc.go

@@ -0,0 +1,347 @@
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024 Datadog, Inc.
+
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/DataDog/dd-trace-go/v2/instrumentation"
+	"golang.org/x/mod/modfile"
+)
+
+const outputPath = "./contrib/supported_versions.md"
+
+// TODO: currently this is taken from the https://github.com/DataDog/orchestrion README, it will be fetched dynamically
+// when Orchestrion aspects are moved to dd-trace-go.
+var autoInstrumentedLibs = map[string]struct{}{
+	"database/sql":                                        {},
+	"github.com/gin-gonic/gin":                            {},
+	"github.com/go-chi/chi/v5":                            {},
+	"github.com/go-chi/chi":                               {},
+	"github.com/go-redis/redis/v7":                        {},
+	"github.com/go-redis/redis/v8":                        {},
+	"github.com/gofiber/fiber/v2":                         {},
+	"github.com/gomodule/redigo/redis":                    {},
+	"github.com/gorilla/mux":                              {},
+	"github.com/jinzhu/gorm":                              {},
+	"github.com/labstack/echo/v4":                         {},
+	"google.golang.org/grpc":                              {},
+	"gorm.io/gorm":                                        {},
+	"net/http":                                            {},
+	"go.mongodb.org/mongo-driver/mongo":                   {},
+	"github.com/aws/aws-sdk-go":                           {},
+	"github.com/hashicorp/vault":                          {},
+	"github.com/IBM/sarama":                               {},
+	"github.com/Shopify/sarama":                           {},
+	"k8s.io/client-go":                                    {},
+	"log/slog":                                            {},
+	"os":                                                  {},
+	"github.com/aws/aws-sdk-go-v2":                        {},
+	"github.com/redis/go-redis/v9":                        {},
+	"github.com/gocql/gocql":                              {},
+	"cloud.google.com/go/pubsub":                          {},
+	"github.com/99designs/gqlgen":                         {},
+	"github.com/redis/go-redis":                           {},
+	"github.com/graph-gophers/graphql-go":                 {},
+	"github.com/graphql-go/graphql":                       {},
+	"github.com/jackc/pgx":                                {},
+	"github.com/elastic/go-elasticsearch":                 {},
+	"github.com/twitchtv/twirp":                           {},
+	"github.com/segmentio/kafka-go":                       {},
+	"github.com/confluentinc/confluent-kafka-go/kafka":    {},
+	"github.com/confluentinc/confluent-kafka-go/kafka/v2": {},
+	"github.com/julienschmidt/httprouter":                 {},
+	"github.com/sirupsen/logrus":                          {},
+}
+
+// stdlibPackages are used to skip in version checking.
+var stdlibPackages = map[string]struct{}{
+	"log/slog":     {},
+	"os":           {},
+	"net/http":     {},
+	"database/sql": {},
+}
+
+type ModuleVersion struct {
+	Name           string
+	MinVersion     string
+	MaxVersion     string
+	Repository     string
+	isInstrumented bool
+}
+
+// modUpdate is the type returned by 'go list -m -u -json <module>'
+type modUpdate struct {
+	Path    string
+	Version string
+	Update  struct {
+		Path    string
+		Version string
+	}
+}
+
+func main() {
+	modules, err := processPackages()
+	if err != nil {
+		log.Fatalf("Error processing packages: %v\n", err)
+	}
+
+	// update with instrumented status
+	for i := range modules {
+		modules[i].isInstrumented = isModuleAutoInstrumented(modules[i].Repository)
+	}
+
+	modulesWithLatest := fetchAllLatestVersions(modules)
+
+	if err := writeMarkdownFile(modulesWithLatest, outputPath); err != nil {
+		fmt.Println(err)
+	}
+
+	fmt.Println("Version information written to", outputPath)
+}
+
+func fetchLatestVersion(module string) (string, error) {
+	if _, ok := stdlibPackages[module]; ok {
+		return "N/A", nil
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	// Run `go list -m -u -json <module>` to retrieve latest available upgrade
+	out, err := runCommand(ctx, "", "go", "list", "-m", "-u", "-json", module)
+	if err != nil {
+		return "", err
+	}
+
+	var m modUpdate
+	if err := json.Unmarshal(out, &m); err != nil {
+		return "", fmt.Errorf("unexpected 'go list -m -u -json' output: %v", err)
+	}
+
+	latest := m.Version
+	if m.Update.Version != "" {
+		latest = m.Update.Version
+	}
+	return latest, nil
+}
+
+// isModuleAutoInstrumented returns whether the module has automatic tracing supported (by Orchestrion)
+func isModuleAutoInstrumented(moduleName string) bool {
+	for key := range autoInstrumentedLibs {
+		if isSubdirectory(moduleName, key) {
+			return true
+		}
+	}
+	return false
+}
+
+func isSubdirectory(url, pattern string) bool {
+	if strings.HasPrefix(url, pattern) {
+		// match is either exact or followed by a "/"
+		return len(url) == len(pattern) || url[len(pattern)] == '/'
+	}
+	return false
+}
+
+// getCurrentVersion parses the go.mod file for a package and extracts the version of a given repository.
+func getCurrentVersion(integrationName, modName string) (ModuleVersion, error) {
+	if _, ok := stdlibPackages[integrationName]; ok {
+		return ModuleVersion{
+			Name:           integrationName,
+			MinVersion:     "N/A",
+			MaxVersion:     "N/A",
+			Repository:     modName,
+			isInstrumented: false,
+		}, nil
+	}
+
+	// Path to contrib/{packageName}
+	contribPath := filepath.Join("contrib", integrationName)
+	goModPath := filepath.Join(contribPath, "go.mod")
+
+	// Check if go.mod exists in directory
+	if _, err := os.Stat(goModPath); os.IsNotExist(err) {
+		return ModuleVersion{}, fmt.Errorf("go.mod not found in %s", contribPath)
+	}
+
+	// Read the go.mod
+	data, err := os.ReadFile(goModPath)
+	if err != nil {
+		return ModuleVersion{}, fmt.Errorf("failed to read go.mod: %w", err)
+	}
+
+	// Parse the go.mod
+	f, err := modfile.Parse(goModPath, data, nil)
+	if err != nil {
+		return ModuleVersion{}, fmt.Errorf("failed to parse go.mod: %w", err)
+	}
+
+	// match the repository name
+	repoPattern := fmt.Sprintf(`\b%s\b`, strings.ReplaceAll(modName, "/", `/`))
+	repoRegex, err := regexp.Compile(repoPattern)
+	if err != nil {
+		return ModuleVersion{}, fmt.Errorf("invalid repository regex pattern: %w", err)
+	}
+
+	// Iterate through require dependencies
+	for _, req := range f.Require {
+		if repoRegex.MatchString(req.Mod.Path) {
+			return ModuleVersion{
+				Name:           integrationName,
+				MinVersion:     req.Mod.Version,
+				MaxVersion:     "",
+				Repository:     req.Mod.Path,
+				isInstrumented: false,
+			}, nil
+		}
+	}
+	return ModuleVersion{}, fmt.Errorf("repository %s not found in go.mod", modName)
+}
+
+// fetchAllLatestVersions concurrently fetches the latest version of each module.
+func fetchAllLatestVersions(modules []ModuleVersion) []ModuleVersion {
+	var wg sync.WaitGroup
+
+	updatedModules := make([]ModuleVersion, len(modules))
+
+	wg.Add(len(modules))
+	for i, mod := range modules {
+		go func(i int, mod ModuleVersion) {
+			defer wg.Done()
+			latestVersion, err := fetchLatestVersion(mod.Repository)
+			if err != nil {
+				fmt.Printf("Error fetching latest version for %s: %v\n", mod.Repository, err)
+				updatedModules[i] = ModuleVersion{mod.Name, mod.MinVersion, "Error", mod.Repository, mod.isInstrumented}
+				return
+			}
+
+			updatedModules[i] = ModuleVersion{
+				Name:           mod.Name,
+				MinVersion:     mod.MinVersion,
+				MaxVersion:     latestVersion,
+				Repository:     mod.Repository,
+				isInstrumented: mod.isInstrumented,
+			}
+		}(i, mod)
+	}
+
+	wg.Wait()
+	return updatedModules
+}
+
+func writeMarkdownFile(modules []ModuleVersion, filePath string) error {
+	// Sort modules by name
+	sort.Slice(modules, func(i, j int) bool {
+		return modules[i].Name < modules[j].Name
+	})
+
+	maxColumnLength := []int{0, 0, 0, 0, 0}
+
+	rows := [][]string{
+		{"Module", "Datadog Integration", "Minimum Tested Version", "Maximum Tested Version", "Auto-Instrumented"},
+		{"-", "-", "-", "-", "-"},
+	}
+	for _, mod := range modules {
+		rows = append(rows, []string{
+			modWithPkgDevURL(mod.Repository, mod.Repository),
+			integrationWithPackageURL(mod.Name),
+			fmt.Sprintf("`%s`", mod.MinVersion),
+			fmt.Sprintf("`%s`", mod.MaxVersion),
+			boolToMarkdown(mod.isInstrumented),
+		})
+	}
+	for _, row := range rows {
+		for i, col := range row {
+			if len(col) > maxColumnLength[i] {
+				maxColumnLength[i] = len(col)
+			}
+		}
+	}
+	for _, row := range rows {
+		for i, col := range row {
+			char := " "
+			if col == "-" {
+				char = "-"
+			}
+			if len(col) < maxColumnLength[i] {
+				row[i] = row[i] + strings.Repeat(char, maxColumnLength[i]-len(col))
+			}
+			row[i] = char + row[i] + char
+		}
+	}
+
+	file, err := os.Create(filePath)
+	if err != nil {
+		return fmt.Errorf("error creating file: %w", err)
+	}
+	defer func() {
+		if err := file.Close(); err != nil {
+			log.Printf("failed to closed file: %v\n", err)
+		}
+	}()
+
+	for _, row := range rows {
+		if _, err := fmt.Fprintln(file, "|"+strings.Join(row, "|")+"|"); err != nil {
+			return fmt.Errorf("failed to write line: %w", err)
+		}
+	}
+	return nil
+}
+
+func processPackages() ([]ModuleVersion, error) {
+	var modules []ModuleVersion
+	for integrationName, mod := range instrumentation.GetPackages() {
+		module, err := getCurrentVersion(string(integrationName), mod)
+		if err != nil {
+			return nil, err
+		}
+		modules = append(modules, module)
+	}
+	return modules, nil
+
+}
+
+func runCommand(ctx context.Context, dir string, commandAndArgs ...string) ([]byte, error) {
+	log.Printf("running command: %q\n", strings.Join(commandAndArgs, " "))
+
+	cmd := exec.CommandContext(ctx, commandAndArgs[0], commandAndArgs[1:]...)
+	cmd.Stderr = os.Stderr
+	cmd.Dir = dir
+
+	b, err := cmd.Output()
+	if err != nil {
+		return nil, fmt.Errorf("failed to run command %q: %v", strings.Join(commandAndArgs, " "), err)
+	}
+	return b, nil
+}
+
+func integrationWithPackageURL(integrationName string) string {
+	modURL := fmt.Sprintf("github.com/DataDog/dd-trace-go/contrib/%s/v2", integrationName)
+	return modWithPkgDevURL("contrib/"+integrationName, modURL)
+}
+
+func modWithPkgDevURL(name, modURL string) string {
+	return fmt.Sprintf("[%s](https://pkg.go.dev/%s)", name, modURL)
+}
+
+func boolToMarkdown(val bool) string {
+	if val {
+		return ":white_check_mark:"
+	}
+	return " "
+}