Change to INI file parsing in config@v1.22.0 and config@v1.21.0

[gdavison]

Describe the bug

In previous versions, leading whitespace before keys in INI files would be ignored during parsing. A file with leading whitespace such as

	[default]
	retry_mode = standard

would successfully use the RetryMode standard

Staring in v1.21.0 this file would not be parsed and configuration would silently fail.

Expected Behavior

One of two options is expected:

1. Leading whitespace would continue to be ignored
2. If the file is not parseable, an error should be returned, or at least a warning should be logged

Current Behavior

The SDK silently ignores the parsing failure

Reproduction Steps

In the test TestParser (

aws-sdk-go-v2/internal/ini/ini_parser_test.go

Line 11 in 71819e8

func TestParser(t *testing.T) {

), add a case

		{
			name: "section statement leading whitespace",
			r: bytes.NewBuffer([]byte(
				`	[default]
	region="us-west-2"`)), // Ensure there is leading whitespace on this line
			expectedStack: []AST{
				newCompletedSectionStatement(
					defaultProfileStmt,
				),
				newExprStatement(regionEQRegion),
			},
		},

This will fail with

expected:
0: {completed_stmt {0 NONE 0 []} false [{section_stmt {1 STRING 0 [100 101 102 97 117 108 116]} true []}]}
1: {expr_stmt {0 NONE 0 []} false [{ {4 NONE 0 [61]} true [{expr {1 STRING 0 [114 101 103 105 111 110]} true []} {expr {1 0 [34 117 115 45 119 101 115 116 45 50 34]} true []}]}]}

received:

Possible Solution

No response

Additional Information/Context

No response

AWS Go SDK V2 Module Versions Used

github.com/aws/aws-sdk-go-v2/config v1.22.0

Compiler and Version used

go version go1.21.0 darwin/arm64

Operating System and version

macOS 13.4.1

[lucix-aws]

Almost certainly a regression from #2226

[isaiahvita]

@gdavison i just put up a PR to resolve this issue. While we would have liked the maintain the old behavior of ignoring the extra whitespace in front of a property definition, this will not be possible in order to support this feature aws/aws-sdk#229

This is because leading whitespace in front of a property definition is now defined as a "sub-property" and subproperties are used to support the feature above. So, we will be throwing a new error as shown in #2359

The added changelog will reflect this breakfix.

[github-actions]

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