build(deps): Bump jscpd from 4.0.5 to 4.2.0

[dependabot]

Bumps jscpd from 4.0.5 to 4.2.0.

Release notes

Sourced from jscpd's releases.

jscpd v4.2.0

Breaking Changes

• Vue SFC tokenization — .vue files are no longer tokenized as markup. Each block is now dispatched to its own sub-format: <script> → javascript, <script lang="ts"> → typescript, \<template> → markup, <style> → css, <style lang="scss"> → scss, <style lang="less"> → less. Clone reports for .vue files now appear under these resolved sub-format names. Any tooling or configuration that relied on .vue clones being reported under markup must be updated.
• --formatsExts users — custom mappings that pointed .vue to markup (e.g. "formatsExts": { "markup": ["vue"] }) will no longer take effect because .vue is handled by the dedicated vue format processor. Remove or update such mappings.

New Features

• Custom tokenizer backend — replaced the prismjs npm package with a self-contained reprism-based grammar engine. ~11.5% faster tokenization on real projects (avg 1126 ms → 997 ms on a 548-file, 223-format scan).
• Cross-format detection — Vue SFC (.vue), Svelte (.svelte), Astro (.astro), and Markdown files are now tokenized per-block/per-section. A <script> block in a .vue file can match a .ts file; a fenced code block in Markdown can match a .py file.
• 223 supported formats — Apex, CFML/ColdFusion, GDScript, Svelte, Astro, and 70+ additional languages added (up from 152). See https://github.com/kucherenko/jscpd/blob/HEAD/supported_formats.md.
• Shebang detection — extensionless executable scripts (e.g. /usr/bin/env python3) are auto-detected by their #! shebang line and tokenized in the correct language.
• --store-path — configure a custom directory for the LevelDB cache, eliminating collisions when multiple jscpd processes run in parallel on the same machine.
• --skipComments — shorthand flag for --mode weak, which strips comments before detection.
• --formats-names — map specific filenames (e.g. Makefile, Dockerfile) to a detection format.

Bug Fixes

• Entire-file duplicates silently dropped (@jscpd/core #728) — RabinKarp flushed the pending clone on a store hit at end-of-file instead of on a miss. Files that are complete copies of each other were undetected. Fixed.
• ReDoS hang on Lisp/Elisp files (@jscpd/tokenizer #737) — the Lisp string regex /"(?:[^"\\]*|\\.)*"/ could catastrophically backtrack (O(2ⁿ)) on unterminated strings. Replaced with a linear /"(?:[^"\\]|\\[\s\S])*"/ pattern.
• Process crash on malformed package.json (#739) — readJSONSync threw an unhandled SyntaxError when package.json contained invalid JSON, killing the process. Now emits a warning and continues with an empty config.
• Vue SFC cross-file detection broken — the detector used the file-level format (vue) as the store namespace for all SFC blocks, preventing a <script> block in one .vue file from ever matching a <script> block in another. The namespace now reflects each block's resolved sub-format.
• Vue SFC incorrect column numbers — tokens on the first line of a block carried block-relative column 1 instead of file-absolute column numbers. Fixed in @jscpd/tokenizer.
• 50 dependency security vulnerabilities remediated across the monorepo (Dependabot batches).

Known Limitations

• Malformed SFC blocks (e.g. unclosed tags, invalid attributes) are silently skipped and do not contribute tokens.

Changelog

Sourced from jscpd's changelog.

4.2.0 — 2026-05-14

Breaking Changes

• Vue SFC tokenization — .vue files are no longer tokenized as markup. Each block is now dispatched to its own sub-format: <script> → javascript, <script lang="ts"> → typescript, \<template> → markup, <style> → css, <style lang="scss"> → scss, <style lang="less"> → less. Clone reports for .vue files now appear under these resolved sub-format names. Any tooling or configuration that relied on .vue clones being reported under markup must be updated.
• --formatsExts users — custom mappings that pointed .vue to markup (e.g. "formatsExts": { "markup": ["vue"] }) will no longer take effect because .vue is handled by the dedicated vue format processor. Remove or update such mappings.

New Features

• Custom tokenizer backend — replaced the prismjs npm package with a self-contained reprism-based grammar engine. ~11.5% faster tokenization on real projects (avg 1126 ms → 997 ms on a 548-file, 223-format scan).
• Cross-format detection — Vue SFC (.vue), Svelte (.svelte), Astro (.astro), and Markdown files are now tokenized per-block/per-section. A <script> block in a .vue file can match a .ts file; a fenced code block in Markdown can match a .py file.
• 223 supported formats — Apex, CFML/ColdFusion, GDScript, Svelte, Astro, and 70+ additional languages added (up from 152). See https://github.com/kucherenko/jscpd/blob/master/FORMATS.md.
• Shebang detection — extensionless executable scripts (e.g. /usr/bin/env python3) are auto-detected by their #! shebang line and tokenized in the correct language.
• --store-path — configure a custom directory for the LevelDB cache, eliminating collisions when multiple jscpd processes run in parallel on the same machine.
• --skipComments — shorthand flag for --mode weak, which strips comments before detection.
• --formats-names — map specific filenames (e.g. Makefile, Dockerfile) to a detection format.

Bug Fixes

• Entire-file duplicates silently dropped (@jscpd/core #728) — RabinKarp flushed the pending clone on a store hit at end-of-file instead of on a miss. Files that are complete copies of each other were undetected. Fixed.
• ReDoS hang on Lisp/Elisp files (@jscpd/tokenizer #737) — the Lisp string regex /"(?:[^"\\]*|\\.)*"/ could catastrophically backtrack (O(2ⁿ)) on unterminated strings. Replaced with a linear /"(?:[^"\\]|\\[\s\S])*"/ pattern.
• Process crash on malformed package.json (#739) — readJSONSync threw an unhandled SyntaxError when package.json contained invalid JSON, killing the process. Now emits a warning and continues with an empty config.
• Vue SFC cross-file detection broken — the detector used the file-level format (vue) as the store namespace for all SFC blocks, preventing a <script> block in one .vue file from ever matching a <script> block in another. The namespace now reflects each block's resolved sub-format.
• Vue SFC incorrect column numbers — tokens on the first line of a block carried block-relative column 1 instead of file-absolute column numbers. Fixed in @jscpd/tokenizer.
• 50 dependency security vulnerabilities remediated across the monorepo (Dependabot batches).

Known Limitations

• Malformed SFC blocks (e.g. unclosed tags, invalid attributes) are silently skipped and do not contribute tokens.

---

4.1.0 — 2026-05-09

New Features

• AI Reporter — new ai reporter that produces compact, token-efficient clone output specifically designed for feeding results into language models and AI tooling. Use --reporters ai to activate it.
• MCP Server enhancements — the Model Context Protocol server now exposes a jscpd://statistics resource and supports a recheck endpoint so AI agents can trigger a rescan without restarting the process.
• Apex & CFML language support — jscpd can now detect duplicate code in Salesforce Apex and ColdFusion Markup Language (CFML) files (closes #83, #619).
• GDScript support — detect copy-paste duplication in Godot Engine GDScript files.
• HTML reporter footer — the HTML report now displays a branded footer with the jscpd version and a sponsor link.
• --noTips flag — suppress the usage-tip messages that appear after a detection run.
• CI: Node.js 22.x / 24.x — continuous integration updated to test against the latest Node.js LTS and current releases.

Performance

• Tokenizer — grammars are now loaded lazily, hot paths are O(n), and the spark-md5 dependency has been removed in favour of a lighter built-in implementation. Startup time and memory usage are noticeably reduced on large codebases.
• Replaced the vendored reprism syntax library with the official prismjs npm package, shrinking the installed footprint.

Bug Fixes

... (truncated)

Commits

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[github-actions]

@dependabot merge

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 0 duplication

Metric	Results
Duplication	0

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AI Reviewer: first review requested successfully. AI can make mistakes. Always validate suggestions.

_{TIP This summary will be updated as you push new changes.}

[codacy-production]

Pull Request Overview

This PR updates the jscpd dependency to version 4.2.0. This version includes a critical ReDoS vulnerability fix and addresses a bug where 100% identical files were not correctly detected. While the project is overall up to standards according to Codacy, there are concerns regarding potential breaking changes in Vue SFC tokenization and the --formatsExts CLI flag that have not been validated. Additionally, the upgrade lacks accompanying tests to verify the regression fixes and new features. A high-priority suggestion is made to pin the dependency version to ensure build determinism and security.

Test suggestions

• Verify that identical files (100% duplicates) are correctly detected as clones (regression test for jscpd issue #728)
• Verify that .vue files are now reported under specific sub-formats (javascript, css, markup) instead of a single 'markup' format (breaking change validation)
• Verify that shebang-only scripts without extensions are correctly tokenized using the new detection logic

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Verify that identical files (100% duplicates) are correctly detected as clones (regression test for jscpd issue #728)
2. Verify that .vue files are now reported under specific sub-formats (javascript, css, markup) instead of a single 'markup' format (breaking change validation)
3. Verify that shebang-only scripts without extensions are correctly tokenized using the new detection logic

Low confidence findings

• The jscpd 4.2.0 release introduces breaking changes regarding Vue SFC tokenization (splitting into sub-formats) and the --formatsExts flag. Please verify if the existing duplicate detection configuration needs adjustments to maintain current behavior.

_{TIP Improve review quality by adding custom instructions
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[codacy-production]

_{🔴 HIGH RISK}

Suggestion: Specify the exact version of the dependency to avoid potential security risks and ensure consistent builds across different environments. This is particularly important for core dependencies to prevent supply chain attacks.

This might be a simple fix:

Suggested change

	"jscpd": "^4.2.0"
	"jscpd": "4.2.0"