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Compose formatter: preserve YAML anchors #546

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Merged
bwateratmsft merged 3 commits into from
Jul 23, 2026
+21 −0
Merged

Compose formatter: preserve YAML anchors #546

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Initial plan
Copilot Jul 22, 2026
cd402bc
Add regression test for YAML anchor formatting
Copilot Jul 22, 2026
f505c70
Add regression test for YAML anchor formatting
Copilot Jul 22, 2026
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Empty file modified packages/compose-language-service/bin/docker-compose-langserver
100644 → 100755
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21 changes: 21 additions & 0 deletions packages/compose-language-service/src/test/providers/DocumentFormattingProvider.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,27 @@ volumes:
await requestDocumentFormattingAndCompare(testConnection, uri, 2, expected2Space);
});

it('Should NOT break YAML anchors', async () => {
// See https://github.com/microsoft/vscode-containers/issues/537
// The anchor must stay inline with its key and not be pushed onto a new line
const testObject = `version: "3.5"

x-anchor: &anchor
FOO: bar

services:
example:
<<: *anchor
image: alpine
`;

const uri = testConnection.sendTextAsYamlDocument(testObject);

const expected2Space = testObject; // Output will be unchanged, anchors must not be broken

await requestDocumentFormattingAndCompare(testConnection, uri, 2, expected2Space);
});
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it('Should NOT wrap long string lines', async () => {
const testObject = `version: '123'
services:
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