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chore(deps): treat line comments as trivia too in the import scan

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From Copilot's fifth pass of #1962. `TRIVIA` covered block comments but not
`//`, despite the contract right above it saying a comment is legal wherever
whitespace is — so `import(// lazy\n"pkg")`, `require(// lazy\n"pkg")`, and
`from // reason\n"pkg"` were stepped over, and such a package would never
enter the candidate set. Same silent-miss direction as the block-comment gap.

Both comment syntaxes are now covered. The line-comment branch runs to
end-of-line only; the newline itself is matched by TRIVIA's `\s` branch.
Regression test added alongside the block-comment one.

The derived set is unchanged at 18 real names — widening trivia does not
admit prose, since a specifier must still follow immediately and
`packageNameOf` rejects anything not shaped like one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HDdo1rNRVQnVRRdsqSrvG3
This commit is contained in:
cliffhall 2026-08-10 21:13:56 -04:00
commit 2f1d97e7bb
1 changed files with 25 additions and 4 deletions
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10
scripts/verify-dep-lockstep.mjs
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@ -132,10 +132,12 @@ export function packageNameOf(specifier) {
// name would silently widen the set.
//
// Whitespace between tokens is really *trivia*: TypeScript allows a comment
// anywhere whitespace is legal, so `import(/* webpackIgnore: true */ "pkg")`
// and `from /* why */ "pkg"` are valid and must still be seen (Copilot,
// #1962). `TRIVIA` stands in for `\s*` at every such position.
const TRIVIA = String.raw`(?:\s|/\*[\s\S]*?\*/)*`;
// anywhere whitespace is legal, so `import(/* webpackIgnore: true */ "pkg")`,
// `from /* why */ "pkg"`, and the line-comment forms (`import(// lazy\n"pkg")`)
// are all valid and must still be seen (Copilot, #1962). `TRIVIA` stands in for
// `\s*` at every such position and covers both comment syntaxes. A line comment
// runs to end-of-line only — the newline itself is matched by the `\s` branch.
const TRIVIA = String.raw`(?:\s|/\*[\s\S]*?\*/|//[^\n]*)*`;
const SPECIFIER_FORMS = [
// import … from "x" / export … from "x"
new RegExp(String.raw`\bfrom${TRIVIA}["']([^"']+)["']`, "g"),