refactor: move off deprecated io/ioutil methods, use http method constants, and adjust lint comments (#160)

* chore: adjust `nolint` comments

* chore: disable `ireturn` linter because it's not bringing joy

* refactor: use `http.MethodGet` and `http.MethodPost`

* refactor: move off `io/ioutil` in favor of `os` methods

Author: G-Rath

.golangci.yaml

@@ -18,6 +18,7 @@ linters:
     - godot            # comments are fine without full stops
     - gomnd            # not every number is magic
     - wsl              # disagree with, for now
+    - ireturn          # disagree with, sort of
   presets:
     - bugs
     - comment

internal/configer/load_test.go

@@ -10,7 +10,7 @@ import (
 	"testing"
 )
 
-// nolint:unparam
+//nolint:unparam
 func newReporter(t *testing.T) (*reporter.Reporter, *bytes.Buffer, *bytes.Buffer) {
 	t.Helper()
 
@@ -164,7 +164,7 @@ func TestLoad(t *testing.T) {
 	}
 
 	if isMissingStderrMessage {
-		// nolint:forbidigo
+		//nolint:forbidigo
 		fmt.Println(gotStderr)
 	}
 

main_test.go

@@ -1,4 +1,4 @@
-// nolint:testpackage // main cannot be accessed directly, so cannot use main_test
+//nolint:testpackage // main cannot be accessed directly, so cannot use main_test
 package main
 
 import (

pkg/database/api-check.go

@@ -64,7 +64,7 @@ func (db APIDB) checkBatch(pkgs []internal.PackageDetails) ([][]ObjectWithID, er
 
 	req, err := http.NewRequestWithContext(
 		context.Background(),
-		"POST",
+		http.MethodPost,
 		db.bulkEndpoint(),
 		bytes.NewBuffer(jsonData),
 	)

pkg/database/api-check_test.go

@@ -51,7 +51,7 @@ func jsonMarshalQueryBatchResponse(t *testing.T, vulns []objectsWithIDs) []byte
 func expectRequestPayload(t *testing.T, r *http.Request, queries []apiQuery) {
 	t.Helper()
 
-	if r.Method != "POST" {
+	if r.Method != http.MethodPost {
 		t.Fatalf("api query was not a POST request")
 	}
 

pkg/database/api-fetch.go

@@ -23,7 +23,7 @@ func (db APIDB) Fetch(id string) (OSV, error) {
 
 	req, err := http.NewRequestWithContext(
 		context.Background(),
-		"GET",
+		http.MethodGet,
 		db.osvEndpoint(id),
 		http.NoBody,
 	)

pkg/database/config.go

@@ -27,7 +27,6 @@ func (dbc Config) Identifier() string {
 var ErrUnsupportedDatabaseType = errors.New("unsupported database source type")
 
 // Load initializes a new OSV database based on the given Config
-// nolint:ireturn
 func Load(config Config, offline bool, batchSize int) (DB, error) {
 	switch config.Type {
 	case "zip":

pkg/database/zip.go

@@ -68,7 +68,7 @@ func (db *ZipDB) fetchZip() ([]byte, error) {
 		return cache.Body, nil
 	}
 
-	req, err := http.NewRequestWithContext(context.Background(), "GET", db.ArchiveURL, nil)
+	req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, db.ArchiveURL, nil)
 
 	if err != nil {
 		return nil, fmt.Errorf("could not retrieve OSV database archive: %w", err)
@@ -112,7 +112,7 @@ func (db *ZipDB) fetchZip() ([]byte, error) {
 	cacheContents, err := json.Marshal(cache)
 
 	if err == nil {
-		// nolint:gosec // being world readable is fine
+		//nolint:gosec // being world readable is fine
 		err = os.WriteFile(cachePath, cacheContents, 0644)
 
 		if err != nil {

pkg/database/zip_test.go

@@ -55,7 +55,7 @@ func cacheWrite(t *testing.T, cache database.Cache) {
 	cacheContents, err := json.Marshal(cache)
 
 	if err == nil {
-		// nolint:gosec // being world readable is fine
+		//nolint:gosec // being world readable is fine
 		err = os.WriteFile(cachePath(cache.URL), cacheContents, 0644)
 	}
 
@@ -67,7 +67,7 @@ func cacheWrite(t *testing.T, cache database.Cache) {
 func cacheWriteBad(t *testing.T, url string, contents string) {
 	t.Helper()
 
-	// nolint:gosec // being world readable is fine
+	//nolint:gosec // being world readable is fine
 	err := os.WriteFile(cachePath(url), []byte(contents), 0644)
 
 	if err != nil {

pkg/lockfile/ecosystems_test.go

@@ -2,15 +2,15 @@ package lockfile_test
 
 import (
 	"github.com/g-rath/osv-detector/pkg/lockfile"
-	"io/ioutil"
+	"os"
 	"strings"
 	"testing"
 )
 
 func numberOfLockfileParsers(t *testing.T) int {
 	t.Helper()
 
-	directories, err := ioutil.ReadDir(".")
+	directories, err := os.ReadDir(".")
 
 	if err != nil {
 		t.Fatalf("unable to read current directory: ")