feat(app_v2): detect app wiring implementation (#3434)

* detect cosmos chain app wiring

* check if the appconfig import exist

* fix lint method comment

* draft some changes to improve the var assign search with ast

* improve the declaration search and find the app wiring implementation finding the `depinject.Inject` declaration

* add changelog

* add test data to a file

* change the appImplementation method names to find the app.go

* fix app.go search

---------

Co-authored-by: İlker G. Öztürk <[email protected]>

changelog.md

@@ -58,6 +58,7 @@
 - [#3244](https://github.com/ignite/cli/pull/3244) Update `actions.yml` for resolving deprecation message
 - [#3337](https://github.com/ignite/cli/pull/3337) Remove `pkg/openapiconsole` import from scaffold template.
 - [#3337](https://github.com/ignite/cli/pull/3337) Register`nodeservice` gRPC in `app.go` template.
+- [#3434](https://github.com/ignite/cli/pull/3434) Detect app wiring implementation.
 - [#3445](https://github.com/ignite/cli/pull/3445) refactor: replace `github.com/ghodss/yaml` with `sigs.k8s.io/yaml`
 
 ### Breaking Changes

ignite/pkg/cosmosanalysis/app/app.go

@@ -16,6 +16,11 @@ import (
 	"github.com/ignite/cli/ignite/pkg/xast"
 )
 
+const (
+	appWiringImport     = "cosmossdk.io/depinject"
+	appWiringCallMethod = "Inject"
+)
+
 var appImplementation = []string{
 	"RegisterAPIRoutes",
 	"RegisterTxService",
@@ -140,6 +145,32 @@ func FindRegisteredModules(chainRoot string) (modules []string, err error) {
 	return modules, nil
 }
 
+// CheckAppWiring check if the app wiring exists finding the `appconfig.Compose` method call.
+func CheckAppWiring(chainRoot string) (bool, error) {
+	// Assumption: modules are registered in the app package
+	appFilePath, err := cosmosanalysis.FindAppFilePath(chainRoot)
+	if err != nil {
+		return false, err
+	}
+	// The directory where the app file is located.
+	// This is required to resolve references within the app package.
+	appDir := filepath.Dir(appFilePath)
+
+	appPkg, _, err := xast.ParseDir(appDir)
+	if err != nil {
+		return false, err
+	}
+
+	// Loop on package's files
+	for _, f := range appPkg.Files {
+		exists := goanalysis.FuncVarExists(f, appWiringImport, appWiringCallMethod)
+		if exists {
+			return true, err
+		}
+	}
+	return false, nil
+}
+
 func exprToString(n ast.Expr) (string, error) {
 	buf := bytes.Buffer{}
 	fset := token.NewFileSet()

ignite/pkg/cosmosanalysis/app/app_test.go

@@ -2,6 +2,7 @@ package app_test
 
 import (
 	_ "embed"
+	"errors"
 	"os"
 	"path/filepath"
 	"testing"
@@ -20,8 +21,8 @@ var (
 	NoAppFile []byte
 	//go:embed testdata/two_app.go
 	TwoAppFile []byte
-	//go:embed testdata/app_full.go
-	AppFullFile []byte
+	//go:embed testdata/app_v2.go
+	AppV2 []byte
 )
 
 func TestCheckKeeper(t *testing.T) {
@@ -360,3 +361,42 @@ func TestFindRegisteredModules(t *testing.T) {
 		})
 	}
 }
+
+func TestCheckAppWiring(t *testing.T) {
+	tests := []struct {
+		name    string
+		appFile []byte
+		want    bool
+		err     error
+	}{
+		{
+			name:    "valid case",
+			appFile: AppV2,
+			want:    true,
+			err:     nil,
+		},
+		{
+			name:    "invalid case",
+			appFile: AppMinimalFile,
+			want:    false,
+			err:     errors.New("app.go file cannot be found"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tmpDir := t.TempDir()
+			tmpFile := filepath.Join(tmpDir, "app.go")
+			err := os.WriteFile(tmpFile, tt.appFile, 0o644)
+			require.NoError(t, err)
+
+			got, err := app.CheckAppWiring(tmpDir)
+			if tt.err != nil {
+				require.Error(t, err)
+				require.Equal(t, tt.err.Error(), err.Error())
+				return
+			}
+			require.NoError(t, err)
+			require.Equal(t, tt.want, got)
+		})
+	}
+}

ignite/pkg/cosmosanalysis/app/testdata/app_generic.go

@@ -3,6 +3,8 @@ package foo
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	abci "github.com/tendermint/tendermint/abci/types"
+
+	app "github.com/ignite/cli/ignite/pkg/cosmosanalysis/app/testdata/modules/registration_not_in_app_go"
 )
 
 type Foo[T any] struct {

ignite/pkg/cosmosanalysis/app/testdata/app_minimal.go

@@ -3,6 +3,8 @@ package foo
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	abci "github.com/tendermint/tendermint/abci/types"
+
+	app "github.com/ignite/cli/ignite/pkg/cosmosanalysis/app/testdata/modules/registration_not_in_app_go"
 )
 
 type Foo struct {