feat(pm): add dedupe command for dependency optimization

[fengmk2]

TL;DR

Added a new vite dedupe command (with ddp alias) that automatically adapts to the detected package manager to optimize dependency trees by removing duplicate packages.

What changed?

• Added a new dedupe command to the CLI that works with pnpm, npm, and yarn@2+
• Implemented package manager-specific adaptations for the dedupe command:
  • Maps to pnpm dedupe, npm dedupe, or yarn dedupe based on detected package manager
  • Supports --check flag that maps to the appropriate dry-run flag for each package manager
  • Handles pass-through arguments for advanced use cases
• Created new modules:
  • crates/vite_package_manager/src/commands/dedupe.rs
  • packages/cli/binding/src/commands/dedupe.rs
• Added comprehensive test coverage for the new command
• Included RFC documentation explaining the design decisions and implementation details

How to test?

1. Basic deduplication:

vite dedupe
vite ddp # alias

2. Check mode (preview changes without modifying):

vite dedupe --check

3. With pass-through arguments:

vite dedupe -- --some-flag --another-flag

Why make this change?

This change simplifies dependency optimization by providing a unified interface across all supported package managers. Previously, developers had to manually use package manager-specific commands with different syntaxes:

• pnpm dedupe --check
• npm dedupe --dry-run
• yarn dedupe --check (yarn@2+ only)

The new command automatically detects the package manager and uses the appropriate syntax, reducing friction in dependency management workflows and improving project efficiency by making it easier to remove redundant packages.

[fengmk2]

• feat(cli): add outdated command for checking package updates #262
• feat(pm): add dedupe command for dependency optimization #256 👈 (View in Graphite)
• refactor(pm): move install, add and remove to commands mod #252: 1 other dependent PR (#254)
• feat(pm): add update command for package dependencies #238
• main

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[fengmk2]

Merge activity

• Oct 28, 8:24 AM UTC: Graphite rebased this pull request as part of a merge.
• Oct 28, 8:31 AM UTC: Graphite couldn't merge this PR because it was not satisfying all requirements.
• Oct 28, 10:01 AM UTC: @fengmk2 merged this pull request with Graphite.

[Copilot]

Pull Request Overview

This PR introduces a new vite dedupe command that provides a unified interface for dependency deduplication across pnpm, npm, and yarn@2+. The command automatically detects the package manager and translates the dedupe operation to the appropriate package manager-specific syntax, with support for check mode (dry-run) and pass-through arguments.

• Adds new dedupe command (alias: ddp) that adapts to detected package manager
• Implements package manager-specific flag mapping (--check for pnpm/yarn, --dry-run for npm)
• Includes comprehensive test coverage and RFC documentation

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
rfcs/dedupe-package-command.md	RFC documentation explaining design decisions and implementation details
packages/tools/src/utils.ts	Enhanced output replacement patterns to handle npm audit log variations
packages/tools/src/tests/utils.spec.ts	Added test cases for new npm audit log patterns
packages/tools/src/tests/snapshots/utils.spec.ts.snap	Updated snapshots for new test cases
packages/global/snap-tests/command-dedupe-yarn4/*	Integration tests for dedupe command with Yarn 4
packages/global/snap-tests/command-dedupe-pnpm10/*	Integration tests for dedupe command with pnpm 10
packages/global/snap-tests/command-dedupe-npm10/*	Integration tests for dedupe command with npm 10
packages/global/snap-tests/cli-helper-message/snap.txt	Updated CLI help output to include dedupe command
packages/cli/snap-tests/exit-non-zero-on-cmd-not-exists/snap.txt	Updated error message to include dedupe subcommands
packages/cli/binding/src/commands/mod.rs	Added dedupe module export
packages/cli/binding/src/commands/dedupe.rs	Implementation of DedupeCommand struct
packages/cli/binding/src/cli.rs	CLI integration with dedupe command and argument parsing
crates/vite_install/src/commands/mod.rs	Added dedupe module export
crates/vite_install/src/commands/dedupe.rs	Core dedupe command logic with package manager adaptations

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