fix(cli): apply default lazy compilation value based on user config

[stormslowly]

Summary

The compiler.options is already set to default by rspack/core. We should load the user configuration in the CLI for future inspection.

Related links

• feat: default lazy compilation from cli and for web app only #12580

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

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[Copilot]

Pull request overview

This PR refactors the CLI to read user configuration before creating the compiler, allowing for proper inspection of user-provided settings. Previously, compiler.options was set to default values by rspack/core, making it difficult to distinguish between user-specified and default values.

Key changes:

• Split createCompiler method into buildCompilerConfig and createCompiler to separate config building from compiler creation
• Moved lazyCompilation default logic from rspack/core to rspack-cli's serve command, enabling conditional defaults based on user config
• Changed default value of lazyCompilation from conditional to false in rspack/core

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/rspack-cli/src/cli.ts	Refactored to separate config building from compiler creation for better config inspection
packages/rspack-cli/src/commands/build.ts	Updated to use new two-step API: build config then create compiler
packages/rspack-cli/src/commands/serve.ts	Updated to use new API and handle lazyCompilation defaults conditionally based on user config and target platform
packages/rspack/src/config/defaults.ts	Simplified lazyCompilation default to always be false, moving conditional logic to CLI
tests/rspack-test/defaultsCases/default/base.js	Updated test expectations to reflect new lazyCompilation default value
tests/rspack-test/defaultsCases/target_/*.js	Updated test expectations for various target configurations
tests/e2e/cases/chunk/recover-error/rspack.config.js	Added explicit lazyCompilation setting for test case

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[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 0 projects with changes.

📊 Quick Summary

Project	Total Size	Change
react-10k	5.7 MB	0
react-1k	823.4 KB	0
react-5k	2.7 MB	0
rome	984.4 KB	0
ui-components	2.1 MB	0

Generated by Rsdoctor GitHub Action

[github-actions]

📦 Binary Size-limit

Comparing 0758066 to chore: bump swc_core from 52.0.0 to 54.0.0 and swc_experimental from 0.3.5 to 0.4.0 (#12582) by CPunisher

🙈 Size remains the same at 47.85MB

[codspeed-hq]

CodSpeed Performance Report

Merging #12583 will not alter performance

_{Comparing fix/lazy_compilation_overrides_by_cor (0758066) with main (4a0f619)}

Summary

✅ 16 untouched
⏩ 1 skipped¹

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩