migrate away from deprecated ioutil APIs (#7175)

Co-authored-by: Callum Waters <cmwaters19@gmail.com>
Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

internal/state/indexer/indexer_service_test.go

@@ -3,22 +3,21 @@ package indexer_test
 import (
 	"database/sql"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 	"time"
 
 	"github.com/adlio/schema"
-	dockertest "github.com/ory/dockertest"
+	"github.com/ory/dockertest"
 	"github.com/ory/dockertest/docker"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	dbm "github.com/tendermint/tm-db"
 
 	abci "github.com/tendermint/tendermint/abci/types"
-	indexer "github.com/tendermint/tendermint/internal/state/indexer"
-	kv "github.com/tendermint/tendermint/internal/state/indexer/sink/kv"
-	psql "github.com/tendermint/tendermint/internal/state/indexer/sink/psql"
+	"github.com/tendermint/tendermint/internal/state/indexer"
+	"github.com/tendermint/tendermint/internal/state/indexer/sink/kv"
+	"github.com/tendermint/tendermint/internal/state/indexer/sink/psql"
 	tmlog "github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/types"
 
@@ -114,7 +113,7 @@ func TestIndexerServiceIndexesBlocks(t *testing.T) {
 
 func readSchema() ([]*schema.Migration, error) {
 	filename := "./sink/psql/schema.sql"
-	contents, err := ioutil.ReadFile(filename)
+	contents, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read sql file from '%s': %w", filename, err)
 	}

internal/state/indexer/sink/psql/psql_test.go

@@ -5,7 +5,6 @@ import (
 	"database/sql"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/signal"
@@ -227,7 +226,7 @@ func newTestBlockHeader() types.EventDataNewBlockHeader {
 // readSchema loads the indexing database schema file
 func readSchema() ([]*schema.Migration, error) {
 	const filename = "schema.sql"
-	contents, err := ioutil.ReadFile(filename)
+	contents, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read sql file from '%s': %w", filename, err)
 	}

internal/state/indexer/tx/kv/kv_bench_test.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"crypto/rand"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	dbm "github.com/tendermint/tm-db"
@@ -15,7 +15,7 @@ import (
 )
 
 func BenchmarkTxSearch(b *testing.B) {
-	dbDir, err := ioutil.TempDir("", "benchmark_tx_search_test")
+	dbDir, err := os.MkdirTemp("", "benchmark_tx_search_test")
 	if err != nil {
 		b.Errorf("failed to create temporary directory: %s", err)
 	}

internal/state/indexer/tx/kv/kv_test.go

@@ -3,7 +3,6 @@ package kv
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -13,7 +12,7 @@ import (
 	dbm "github.com/tendermint/tm-db"
 
 	abci "github.com/tendermint/tendermint/abci/types"
-	indexer "github.com/tendermint/tendermint/internal/state/indexer"
+	"github.com/tendermint/tendermint/internal/state/indexer"
 	"github.com/tendermint/tendermint/libs/pubsub/query"
 	tmrand "github.com/tendermint/tendermint/libs/rand"
 	"github.com/tendermint/tendermint/types"
@@ -334,7 +333,7 @@ func txResultWithEvents(events []abci.Event) *abci.TxResult {
 }
 
 func benchmarkTxIndex(txsCount int64, b *testing.B) {
-	dir, err := ioutil.TempDir("", "tx_index_db")
+	dir, err := os.MkdirTemp("", "tx_index_db")
 	require.NoError(b, err)
 	defer os.RemoveAll(dir)
 

internal/state/state.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"time"
 
 	"github.com/gogo/protobuf/proto"
@@ -323,7 +323,7 @@ func MakeGenesisStateFromFile(genDocFile string) (State, error) {
 
 // MakeGenesisDocFromFile reads and unmarshals genesis doc from the given file.
 func MakeGenesisDocFromFile(genDocFile string) (*types.GenesisDoc, error) {
-	genDocJSON, err := ioutil.ReadFile(genDocFile)
+	genDocJSON, err := os.ReadFile(genDocFile)
 	if err != nil {
 		return nil, fmt.Errorf("couldn't read GenesisDoc file: %v", err)
 	}