Fix ENAMETOOLONG crash when CSS data URIs are processed by tsconfig alias plugin#17294
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Fix ENAMETOOLONG crash when CSS data URIs are processed by tsconfig alias plugin#17294astrobot-houston wants to merge 2 commits into
astrobot-houston wants to merge 2 commits into
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Data URIs like url('data:image/svg+xml;base64,...') were incorrectly
matched by the baseUrl alias regex and passed to fs.statSync(), which
throws ENAMETOOLONG when the base64 string exceeds the OS filename
length limit (255 bytes).
Add an early return in replaceAliases() to skip data: URIs since they
are inline content, not file paths to resolve.
Fixes #17293
Data URIs like url('data:image/svg+xml;base64,...') were incorrectly
matched by the baseUrl alias regex and passed to fs.statSync(), which
throws ENAMETOOLONG when the base64 string exceeds the OS filename
length limit (255 bytes).
Add an early return in replaceAliases() to skip data: URIs since they
are inline content, not file paths to resolve.
Fixes #17293
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matthewp
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Jul 4, 2026
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Should there be another try-catch around |
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Changes
url('data:image/...')data URIs no longer crashastro buildwithENAMETOOLONGwhentsconfig.jsonhascompilerOptions.baseUrlset. Thevite-plugin-config-aliasCSS transform now skips anyurl()reference that starts withdata:, since data URIs are inline content and never valid file paths to resolve.cssUrlREmatching added to the CSS transform handler (commit4766f3716d). The baseUrl alias regex/^(?!\.*\/|\.*$|\w:)(.+)$/was designed to exclude Windows drive letters but\w:only matches a single character before the colon, sodata:(4 chars) slipped through and was passed tofs.statSync().Closes #17293
Testing
packages/astro/test/alias-css-url-data-uri.test.tswith a fixture that combinestsconfig.jsonbaseUrl: "."and a CSSurl()data URI — verifies the build completes without error and the data URI is preserved in output.Docs