feat: Rewrite git pre push hook from bash to nu - #169

Walkthrough

Introduces a Nushell pre-push hook script and updates lefthook configuration to run it via nu --stdin, replacing a prior shell-based script. The new script conditionally reads and parses stdin for refs/SHAs and prints structured output when valid input is present.

Changes

Sequence Diagram(s)

sequenceDiagram
    autonumber
    participant Dev as Developer
    participant Git as Git
    participant LH as Lefthook
    participant NU as Nushell pre-push hook (sync.nu)

    Dev->>Git: git push
    Git->>LH: trigger pre-push hook (stdin refs)
    LH->>NU: run nu --stdin with input
    alt Valid input (>=4 tokens on a line)
        NU->>LH: print header + parsed refs/oids
    else No valid input
        NU-->>LH: no output
    end
    LH->>Git: return hook result
    Git->>Dev: continue push (per hook outcome)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nudge the push with twitching nose,
Nushell hums where bash once dozed—
Four little tokens, neatly aligned,
Refs and oids, precisely defined.
A hop, a print, then off I go—
“Pushing to remote!”—ears aglow. 🐇✨

Code Analysis

• This is a Git hook script written in Nushell (nu) for lefthook pre-push functionality
• The script parses stdin input containing Git push reference information
• Proper input validation is implemented with length checks and empty case handling
• The script extracts and structures push metadata (local_ref, local_oid, remote_ref, remote_oid)
• The original shell script has been replaced with a Nushell implementation

Security Review

• ✅ Input parsing uses safe Nushell operations with proper validation
• ✅ No direct execution of user-provided data or unsafe string interpolation
• ✅ Environment variables are not being used in unsafe ways
• ⚠️ Consider adding input sanitization for the extracted values if they will be used in downstream commands

Optimization Suggestions

• ✅ The script efficiently handles empty input cases early
• ✅ Uses Nushell's built-in parsing capabilities instead of external tools
• ⚠️ Consider adding early return for empty input to avoid unnecessary processing
• ⚠️ The commented debug prints could be removed or converted to conditional logging

Overall Quality: 4

The code demonstrates good practices for Git hook scripting with proper input validation and structured data extraction. The migration from shell to Nushell appears well-executed with appropriate use of the language's features. Minor improvements could include removing debug code and adding more explicit error handling for edge cases.

Code Analysis

• New Nushell script added for Git pre-push hook functionality
• Script properly handles stdin input parsing for Git push references
• Uses modern Nushell syntax with type-safe object construction
• Includes proper input validation and empty case handling
• Configuration updated to use Nushell runner instead of shell script

Security Review

• ✅ Input parsing uses safe Nushell operations with proper validation
• ✅ No direct execution of untrusted input - only parsing and logging
• ✅ Script uses structured data handling rather than string concatenation
• ✅ No external command execution with user-provided data

Optimization Suggestions

• Consider adding error handling for malformed input lines
• Could implement actual synchronization logic instead of just logging
• Add timestamp or execution context to logs for better debugging
• Consider making the script more generic/reusable across projects

Overall Quality: 4/5

Note: This appears to be a Git hook script rather than frontend React/Vue code. The review focuses on general code quality and security aspects applicable to scripting.