feat: ini2 parser (#2365)

.changelog/7d0bbc1477cd4cefa6958c9762ace056.json

@@ -0,0 +1,9 @@
+{
+    "id": "7d0bbc14-77cd-4cef-a695-8c9762ace056",
+    "type": "feature",
+    "description": "Replace the legacy config parser with a modern, less-strict implementation. Parsing failures within a section will now simply ignore the invalid line rather than silently drop the entire section.",
+    "modules": [
+        "config",
+        "internal/ini"
+    ]
+}

config/config_test.go

@@ -3,6 +3,7 @@ package config
 import (
 	"context"
 	"fmt"
+	"os"
 	"testing"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
@@ -146,3 +147,66 @@ func TestLoadDefaultConfig(t *testing.T) {
 		t.Fatal("expect error when optFn returns error, got nil")
 	}
 }
+
+func BenchmarkLoadProfile1(b *testing.B) {
+	benchConfigLoad(b, 1)
+}
+
+func BenchmarkLoadProfile10(b *testing.B) {
+	benchConfigLoad(b, 10)
+}
+
+func BenchmarkLoadProfile100(b *testing.B) {
+	benchConfigLoad(b, 100)
+}
+
+func BenchmarkLoadProfile1000(b *testing.B) {
+	benchConfigLoad(b, 1000)
+}
+
+func benchConfigLoad(b *testing.B, n int) {
+	f, err := generateProfiles(n)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	defer os.Remove(f)
+	opt := WithSharedConfigFiles([]string{f})
+
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		LoadDefaultConfig(context.Background(), opt)
+	}
+}
+
+const profileTemplate = `
+[profile role%d]
+tool_sso_start_url  = https://example.awsapps.com/start
+tool_sso_region     = us-west-2
+tool_sso_account_id = 12345678901234
+tool_sso_role_name  = some_role_name
+tool_generated_from = some_tool
+credential_process  = some_tool credential-process
+`
+
+func generateProfiles(n int) (string, error) {
+	f, err := os.CreateTemp("", fmt.Sprintf("aws-bench-config-%d-*", n))
+	if err != nil {
+		return "", err
+	}
+
+	for i := 0; i < n; i++ {
+		if _, err := fmt.Fprintf(f, profileTemplate, n); err != nil {
+			f.Close()
+			os.Remove(f.Name())
+			return "", err
+		}
+	}
+
+	if err := f.Close(); err != nil {
+		os.Remove(f.Name())
+		return "", err
+	}
+
+	return f.Name(), nil
+}

config/shared_config_test.go

@@ -22,11 +22,9 @@ import (
 var _ regionProvider = (*SharedConfig)(nil)
 
 var (
-	testConfigFilename           = filepath.Join("testdata", "shared_config")
-	testConfigOtherFilename      = filepath.Join("testdata", "shared_config_other")
-	testCredentialsFilename      = filepath.Join("testdata", "shared_credentials")
-	testConfigLeadingWSFilename1 = filepath.Join("testdata", "leading_ws")
-	testConfigLeadingWSFilename2 = filepath.Join("testdata", "leading_ws_trailing_nl")
+	testConfigFilename      = filepath.Join("testdata", "shared_config")
+	testConfigOtherFilename = filepath.Join("testdata", "shared_config_other")
+	testCredentialsFilename = filepath.Join("testdata", "shared_credentials")
 )
 
 func TestNewSharedConfig(t *testing.T) {
@@ -140,9 +138,10 @@ func TestNewSharedConfig(t *testing.T) {
 		"Invalid INI file": {
 			ConfigFilenames: []string{filepath.Join("testdata", "shared_config_invalid_ini")},
 			Profile:         "profile_name",
-			Err: SharedConfigLoadError{
-				Filename: filepath.Join("testdata", "shared_config_invalid_ini"),
-				Err:      fmt.Errorf("invalid state"),
+			Err: SharedConfigProfileNotExistError{
+				Filename: []string{filepath.Join("testdata", "shared_config_invalid_ini")},
+				Profile:  "profile_name",
+				Err:      nil,
 			},
 		},
 		"S3UseARNRegion property on profile": {
@@ -687,16 +686,6 @@ func TestNewSharedConfig(t *testing.T) {
 				EC2IMDSv1Disabled: aws.Bool(false),
 			},
 		},
-		"leading whitespace error 1": {
-			ConfigFilenames: []string{testConfigLeadingWSFilename1},
-			Profile:         "leading-whitespace-error",
-			Err:             fmt.Errorf("Invalid token, remove leading whitespace"),
-		},
-		"leading whitespace error 2": {
-			ConfigFilenames: []string{testConfigLeadingWSFilename2},
-			Profile:         "leading-whitespace-error",
-			Err:             fmt.Errorf("Invalid token, remove leading whitespace"),
-		},
 	}
 
 	for name, c := range cases {