refactor: migrate 'flowutils' to 'must' helpers

pkg/codegen/pkg.go

@@ -7,7 +7,7 @@ import (
 	"os/exec"
 	"text/template"
 
-	. "git.offline-twitter.com/offline-labs/gas-stack/pkg/flowutils"
+	"git.offline-twitter.com/offline-labs/gas-stack/pkg/must"
 )
 
 //go:embed "tpl"
@@ -22,31 +22,31 @@ type PkgOpts struct {
 func InitPkg(opts PkgOpts) {
 	// Run `go mod init`
 	fmt.Printf("Running...  `go mod init %s`\n", opts.ModuleName)
-	PanicIf(exec.Command("go", "mod", "init", opts.ModuleName).Run())
+	must.Do(exec.Command("go", "mod", "init", opts.ModuleName).Run())
 
 	// Run `git init`, if required
 	if exec.Command("git", "status").Run() != nil {
 		// Not in a git repo yet; init one
 		fmt.Println("Running...  `git init`")
-		PanicIf(exec.Command("git", "init").Run())
+		must.Do(exec.Command("git", "init").Run())
 	}
 
 	// Create package structure
-	PanicIf(os.MkdirAll("pkg/db", 0o755))
-	PanicIf(os.MkdirAll("cmd", 0o755))
-	PanicIf(os.MkdirAll("doc", 0o755))
-	PanicIf(os.MkdirAll("sample_data", 0o755))
+	must.Do(os.MkdirAll("pkg/db", 0o755))
+	must.Do(os.MkdirAll("cmd", 0o755))
+	must.Do(os.MkdirAll("doc", 0o755))
+	must.Do(os.MkdirAll("sample_data", 0o755))
 
-	PanicIf(os.WriteFile("pkg/db/schema.sql", Must(tpl.ReadFile("tpl/schema.sql")), 0o664))
-	PanicIf(os.WriteFile("pkg/db/db.go", Must(tpl.ReadFile("tpl/db.go.tpl")), 0o664))
+	must.Do(os.WriteFile("pkg/db/schema.sql", must.Get(tpl.ReadFile("tpl/schema.sql")), 0o664))
+	must.Do(os.WriteFile("pkg/db/db.go", must.Get(tpl.ReadFile("tpl/db.go.tpl")), 0o664))
 
-	dbTest := Must(os.Create("pkg/db/db_test.go"))
-	defer MustClose(dbTest)
-	t := Must(template.ParseFS(tpl, "tpl/db_test.go.tpl"))
-	PanicIf(t.Execute(dbTest, opts))
+	dbTest := must.Get(os.Create("pkg/db/db_test.go"))
+	defer must.Close(dbTest)
+	t := must.Get(template.ParseFS(tpl, "tpl/db_test.go.tpl"))
+	must.Do(t.Execute(dbTest, opts))
 
-	PanicIf(os.WriteFile("sample_data/mount.sh", Must(tpl.ReadFile("tpl/mount.sh")), 0o775))
-	PanicIf(os.WriteFile("sample_data/reset.sh", Must(tpl.ReadFile("tpl/reset.sh")), 0o775))
+	must.Do(os.WriteFile("sample_data/mount.sh", must.Get(tpl.ReadFile("tpl/mount.sh")), 0o775))
+	must.Do(os.WriteFile("sample_data/reset.sh", must.Get(tpl.ReadFile("tpl/reset.sh")), 0o775))
 
 	// TODO:
 	// - create `pkg/db/errors.go`

pkg/flowutils/flowutils.go

@@ -1,18 +0,0 @@
-package flowutils
-
-import "io"
-
-func PanicIf(err error) {
-	if err != nil {
-		panic(err)
-	}
-}
-
-func Must[T any](val T, err error) T {
-	PanicIf(err)
-	return val
-}
-
-func MustClose(closer io.Closer) {
-	PanicIf(closer.Close())
-}

pkg/must/must.go

@@ -0,0 +1,27 @@
+package must
+
+import (
+	"fmt"
+	"io"
+)
+
+func Do(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+func Get[T any](val T, err error) T {
+	Do(err)
+	return val
+}
+
+func Be(condition bool, msg string, args ...any) {
+	if !condition {
+		panic(fmt.Errorf(msg, args...)) //nolint:err113 // not a returned error
+	}
+}
+
+func Close(closer io.Closer) {
+	Do(closer.Close())
+}

pkg/schema/migration_verification_test.go

@@ -9,7 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"git.offline-twitter.com/offline-labs/gas-stack/pkg/db"
-	"git.offline-twitter.com/offline-labs/gas-stack/pkg/flowutils"
+	"git.offline-twitter.com/offline-labs/gas-stack/pkg/must"
 	"git.offline-twitter.com/offline-labs/gas-stack/pkg/schema"
 )
 
@@ -57,7 +57,7 @@ func TestVerifyCorrectMigration(t *testing.T) {
 			alter table t1 add column data3 integer;
 		`
 		db2Config := db.Init(&baseSchema, &[]string{migration})
-		db2 := flowutils.Must(db2Config.Create(":memory:"))
+		db2 := must.Get(db2Config.Create(":memory:"))
 		require.NoError(t, db2Config.CheckAndUpdateVersion(db2))
 		db2Schema := schema.SchemaFromDB(db2)
 
@@ -77,7 +77,7 @@ func TestVerifyCorrectMigration(t *testing.T) {
 		`
 
 		db2Config := db.Init(&baseSchema, &[]string{migration1, migration2})
-		db2 := flowutils.Must(db2Config.Create(":memory:"))
+		db2 := must.Get(db2Config.Create(":memory:"))
 		require.NoError(t, db2Config.CheckAndUpdateVersion(db2))
 		db2Schema := schema.SchemaFromDB(db2)
 
@@ -93,7 +93,7 @@ func TestIncorrectMigrations(t *testing.T) {
 
 	t.Run("missing migration", func(t *testing.T) {
 		db2Config := db.Init(&baseSchema, &[]string{})
-		db2 := flowutils.Must(db2Config.Create(":memory:"))
+		db2 := must.Get(db2Config.Create(":memory:"))
 		require.NoError(t, db2Config.CheckAndUpdateVersion(db2))
 		db2Schema := schema.SchemaFromDB(db2)
 
@@ -114,7 +114,7 @@ func TestIncorrectMigrations(t *testing.T) {
 					rowid integer primary key
 				);
 			`})
-		db2 := flowutils.Must(db2Config.Create(":memory:"))
+		db2 := must.Get(db2Config.Create(":memory:"))
 		require.NoError(t, db2Config.CheckAndUpdateVersion(db2))
 		db2Schema := schema.SchemaFromDB(db2)
 
@@ -136,7 +136,7 @@ func TestIncorrectMigrations(t *testing.T) {
 			);
 			alter table t1 add column data3 text;
 		`})
-		db2 := flowutils.Must(db2Config.Create(":memory:"))
+		db2 := must.Get(db2Config.Create(":memory:"))
 		require.NoError(t, db2Config.CheckAndUpdateVersion(db2))
 		db2Schema := schema.SchemaFromDB(db2)
 

pkg/schema/parse.go

@@ -10,7 +10,7 @@ import (
 	"github.com/jmoiron/sqlx"
 	_ "github.com/mattn/go-sqlite3"
 
-	. "git.offline-twitter.com/offline-labs/gas-stack/pkg/flowutils"
+	"git.offline-twitter.com/offline-labs/gas-stack/pkg/must"
 	"git.offline-twitter.com/offline-labs/gas-stack/pkg/textutils"
 )
 
@@ -38,20 +38,20 @@ func SchemaFromDB(db *sqlx.DB) Schema {
 	db.MustExec(create_views)
 
 	var tables []Table
-	PanicIf(db.Select(&tables, `select name, table_type, is_strict, is_without_rowid from tables`))
+	must.Do(db.Select(&tables, `select name, table_type, is_strict, is_without_rowid from tables`))
 	for _, tbl := range tables {
 		tbl.GoTypeName = TypenameFromTablename(tbl.TableName)
 		tbl.TypeIDName = tbl.GoTypeName + "ID"
 		tbl.VarName = strings.ToLower(string(tbl.TableName[0]))
 
-		PanicIf(db.Select(&tbl.Columns, `select * from columns where table_name = ?`, tbl.TableName))
+		must.Do(db.Select(&tbl.Columns, `select * from columns where table_name = ?`, tbl.TableName))
 		ret.Tables[tbl.TableName] = tbl
 	}
 
 	var indexes []Index
-	PanicIf(db.Select(&indexes, `select index_name, table_name, is_unique from indexes`))
+	must.Do(db.Select(&indexes, `select index_name, table_name, is_unique from indexes`))
 	for _, idx := range indexes {
-		PanicIf(db.Select(&idx.Columns, `select column_name from index_columns where index_name = ? order by rank`, idx.Name))
+		must.Do(db.Select(&idx.Columns, `select column_name from index_columns where index_name = ? order by rank`, idx.Name))
 		ret.Indexes[idx.Name] = idx
 	}
 	return ret