chore(cli): Convert JS files to TS (part III)

[Tobbe]

Continue on #855

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☁️ Nx Cloud last updated this comment at 2025-12-30 12:53:30 UTC

[greptile-apps]

Greptile Summary

This PR continues the TypeScript migration of the Cedar CLI by converting 23 JavaScript files to TypeScript. The conversion includes:

• Command files: Converted build.ts, check.ts, console.ts, destroy.ts, exec.ts, experimental.ts, generate.ts, info.ts, lint.ts, prerender.ts, prisma.ts, test.ts, and type-check.ts with proper yargs Argv typing
• Handler files: Migrated buildHandler.ts, consoleHandler.ts, execHandler.ts, prerenderHandler.ts, prismaHandler.ts, type-checkHandler.ts, and the large upgrade.ts file with interface definitions for options
• Test files: Converted test files to TypeScript with proper vitest types and mocking
• Configuration: Updated tsconfig.json to use NodeNext module resolution and tsconfig.build.json to use Node20

The conversion adds proper type safety through:

• Interface definitions for command options (e.g., BuildOptions, ExecOptions, PrismaOptions)
• Type guards for runtime checks (e.g., isREPLServerWithHistory in consoleHandler.ts)
• Proper error typing with type narrowing (e instanceof Error)
• Yargs builder functions with Argv types

Previous syntax issues from thread comments have been addressed - template literal interpolation now works correctly in both execHandler.ts and prerenderHandler.ts.

Confidence Score: 5/5

• This PR is safe to merge - it's a straightforward JS to TS conversion with proper type definitions and no logic changes
• Clean TypeScript conversion with consistent patterns throughout, previous syntax issues resolved, no breaking changes to functionality, comprehensive type annotations added, and test files properly migrated
• No files require special attention

Important Files Changed

Filename	Overview
packages/cli/src/commands/prerenderHandler.ts	Converted from JS to TS with proper type definitions for routes and parameters
packages/cli/src/commands/execHandler.ts	Converted from JS to TS with ExecOptions interface, template literal issues fixed
packages/cli/src/commands/upgrade.ts	Large JS to TS conversion with proper type annotations and interface definitions
packages/cli/src/commands/consoleHandler.ts	Converted from JS to TS with type guards for REPL server extensions
packages/cli/src/commands/buildHandler.ts	Converted from JS to TS with BuildOptions interface
packages/cli/src/commands/prismaHandler.ts	Converted from JS to TS with PrismaOptions interface and proper error handling
packages/cli/src/commands/lint.ts	Converted from JS to TS with proper function type annotations
packages/cli/src/commands/type-checkHandler.ts	Converted from JS to TS with type definitions for options

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant CLI as Cedar CLI
    participant TS as TypeScript Compiler
    participant Babel as Babel
    participant Yargs as Yargs Parser
    
    Note over Dev,CLI: JS to TS Conversion Process
    
    Dev->>CLI: Runs CLI command (e.g., cedar build)
    CLI->>Yargs: Parse command with typed Argv<T>
    Yargs-->>CLI: Typed command options
    
    alt Command requires handler execution
        CLI->>TS: Type-check handler with interfaces
        Note over CLI,TS: BuildOptions, ExecOptions, etc.
        TS-->>CLI: Type validation passed
        
        CLI->>Babel: Transpile TS files with @ts-expect-error
        Note over Babel: For lib/colors.js, lib/exec.js, etc.
        Babel-->>CLI: Compiled JS code
        
        CLI->>CLI: Execute handler logic
        
        alt Command involves external tools
            CLI->>CLI: Run Prisma/ESLint/Jest via execa
        end
    end
    
    Note over Dev,CLI: All commands now have type safety
    CLI-->>Dev: Command execution result

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[greptile-apps]

Additional Comments (1)

1. packages/cli/src/commands/execHandler.ts, line 177-179 (link)

   syntax: Same template literal interpolation issue

   _{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

_{31 files reviewed, 3 comments}

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[Tobbe]

@greptileai Please do a full review again and update your review summary