add initial application structure with configuration, logging, and health check endpoints

cmd/gen/controllers/main.go

@@ -0,0 +1,142 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"go/format"
+	"os"
+	"path/filepath"
+	"regexp"
+	"sort"
+)
+
+func main() {
+	controllerDir, err := findControllerDir()
+	if err != nil {
+		fatal(err)
+	}
+
+	ctors, err := findControllerCtors(controllerDir)
+	if err != nil {
+		fatal(err)
+	}
+
+	content, err := renderModule(ctors)
+	if err != nil {
+		fatal(err)
+	}
+
+	outPath := filepath.Join(controllerDir, "module.go")
+	if err := os.WriteFile(outPath, content, 0o644); err != nil {
+		fatal(err)
+	}
+}
+
+func findControllerDir() (string, error) {
+	wd, err := os.Getwd()
+	if err != nil {
+		return "", err
+	}
+
+	if exists(filepath.Join(wd, "module.go")) && exists(filepath.Join(wd, "routes.go")) {
+		return wd, nil
+	}
+
+	candidate := filepath.Join(wd, "internal", "controller")
+	if exists(filepath.Join(candidate, "module.go")) {
+		return candidate, nil
+	}
+
+	return "", fmt.Errorf("could not locate internal/controller")
+}
+
+func findControllerCtors(dir string) ([]string, error) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return nil, err
+	}
+
+	ctorRe := regexp.MustCompile(`(?m)^func\s+(New[A-Za-z0-9_]*Controller)\s*\(`)
+
+	seen := make(map[string]struct{})
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		name := entry.Name()
+		if !hasSuffix(name, "_controller.go") {
+			continue
+		}
+		if name == "module.go" {
+			continue
+		}
+
+		path := filepath.Join(dir, name)
+		data, err := os.ReadFile(path)
+		if err != nil {
+			return nil, err
+		}
+
+		matches := ctorRe.FindAllSubmatch(data, -1)
+		for _, m := range matches {
+			if len(m) < 2 {
+				continue
+			}
+			seen[string(m[1])] = struct{}{}
+		}
+	}
+
+	var ctors []string
+	for k := range seen {
+		ctors = append(ctors, k)
+	}
+	sort.Strings(ctors)
+
+	return ctors, nil
+}
+
+func renderModule(ctors []string) ([]byte, error) {
+	var buf bytes.Buffer
+
+	buf.WriteString("// Code generated by cmd/gen/controllers; DO NOT EDIT.\n")
+	buf.WriteString("package controller\n\n")
+	buf.WriteString("import \"go.uber.org/fx\"\n\n")
+	buf.WriteString("var Module = fx.Options(\n")
+
+	if len(ctors) > 0 {
+		buf.WriteString("\tfx.Provide(\n")
+		for _, ctor := range ctors {
+			buf.WriteString("\t\t")
+			buf.WriteString(ctor)
+			buf.WriteString(",\n")
+		}
+		buf.WriteString("\t),\n")
+	}
+
+	buf.WriteString("\tfx.Invoke(\n\t\tRegisterRoutes,\n\t),\n")
+	buf.WriteString(")\n")
+
+	formatted, err := format.Source(buf.Bytes())
+	if err != nil {
+		return nil, err
+	}
+
+	return formatted, nil
+}
+
+func exists(path string) bool {
+	info, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	return !info.IsDir()
+}
+
+func hasSuffix(s, suffix string) bool {
+	return len(s) >= len(suffix) && s[len(s)-len(suffix):] == suffix
+}
+
+func fatal(err error) {
+	fmt.Fprintln(os.Stderr, err)
+	os.Exit(1)
+}

cmd/server/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"epic-ent/internal/bootstrap"
+)
+
+func main() {
+	app := bootstrap.NewApp()
+
+	if err := app.Start(context.Background()); err != nil {
+		log.Fatalf("failed to start app: %v", err)
+	}
+
+	<-app.Done()
+
+	if err := app.Stop(context.Background()); err != nil {
+		log.Printf("failed to stop app: %v", err)
+	}
+}