fix: silence branch track output in auto mode

[ueryooo]

Description

Silence git branch --track output in auto mode so create_worktree returns only the worktree path.

Motivation

In ‎track_mode=auto with a remote-only branch, ‎git branch --track printed to stdout, which was concatenated into ‎WORKTREE_PATH; postCreate hooks then failed when ‎cd "$WORKTREE_PATH" was interpreted as ‎cd Branch ...; this change keeps stdout clean by discarding the tracking command output.

Fixes #32

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code refactoring (no functional changes)
• Other (please describe):

Testing

Manual Testing Checklist

Tested on:

• macOS
• Linux (specify distro: **_**)
• Windows (Git Bash)

Core functionality tested:

• git gtr new <branch> - Create worktree
• git gtr go <branch> - Navigate to worktree
• git gtr editor <branch> - Open in editor (if applicable)
• git gtr ai <branch> - Start AI tool (if applicable)
• git gtr rm <branch> - Remove worktree
• git gtr list - List worktrees
• git gtr config - Configuration commands (if applicable)
• Other commands affected by this change: **__**

Test Steps

1. Ensure branch exists on origin only (no local branch);
2. Run ‎git gtr new <branch> (track_mode=auto);
3. Confirm ‎WORKTREE_PATH equals the created worktree path with no extra text
4. Run postCreate hook or ‎cd "$WORKTREE_PATH"; it succeeds.

Expected behavior:

create_worktree stdout is just the worktree path; hooks can cd successfully.

Actual behavior:

Matches expected after the change.

Breaking Changes

• This PR introduces breaking changes
• I have discussed this in an issue first
• Migration guide is included in documentation

Checklist

Before submitting this PR, please check:

• I have read CONTRIBUTING.md
• My code follows the project's style guidelines
• I have performed manual testing on at least one platform
• I have updated documentation (README.md, CLAUDE.md, etc.) if needed
• My changes work on multiple platforms (or I've noted platform-specific behavior)
• I have added/updated shell completions (if adding new commands or flags)
• I have tested with both git gtr (production) and ./bin/gtr (development)
• No new external dependencies are introduced (Bash + git only)
• All existing functionality still works

Additional Context

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License Acknowledgment

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache License 2.0.

Summary by CodeRabbit

• Chores
  • Minor internal maintenance update with no end-user visible changes.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

The change modifies output redirection for git branch --track in lib/core.sh, shifting from stderr-only suppression (2>/dev/null) to full output redirection (>/dev/null 2>&1). This prevents stdout from the branch creation command from polluting the WORKTREE_PATH variable.

Changes

Cohort / File(s)	Change Summary
Output redirection fix lib/core.sh	Modified git branch --track command to redirect both stdout and stderr to /dev/null instead of stderr only, preventing output contamination of the returned worktree path.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Single-line change affecting one file
• Straightforward redirection pattern modification
• Clear bug fix with no structural implications

Poem

🐰 The stdout was chatty, polluting the way,
So we hushed both its voices without delay.
Now WORKTREE_PATH flows clean and pure,
No cd confusion—the fix is secure! ✨

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main change: silencing branch track output when in auto mode, which directly addresses the bug fix in the changeset.
Linked Issues check	✅ Passed	The code change directly implements the proposed fix from issue #32 by redirecting both stdout and stderr from git branch --track to /dev/null in auto mode, ensuring create_worktree returns only the worktree path.
Out of Scope Changes check	✅ Passed	The change is narrowly scoped to fixing the stdout pollution issue in lib/core.sh with no extraneous modifications; all changes are directly related to issue #32.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📥 Commits

Reviewing files that changed from the base of the PR and between 15ec2e3 and d8e6b3b.

📒 Files selected for processing (1)

• lib/core.sh (1 hunks)

🧰 Additional context used

📓 Path-based instructions (5)

lib/**/*.sh

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

lib/**/*.sh: Core libraries (lib/core.sh, lib/config.sh, lib/ui.sh, lib/copy.sh, lib/hooks.sh, lib/platform.sh) must be sourced at startup and implement specific functionality
Maintain backwards compatibility with Git <2.22 by using fallback rev-parse --abbrev-ref HEAD instead of branch --show-current

lib/**/*.sh: Maintain backwards compatibility with existing configs in shell scripts
Quote all paths to support spaces in directory names
Use log_error / log_info from lib/ui.sh for user messages
Implement Git version fallbacks (e.g., Git 2.22+ --show-current vs older rev-parse); check lib/core.sh:97-100 for example
Add new config keys with gtr.<name> prefix to avoid collisions
For performance-sensitive loops (e.g., directory scans), prefer built-ins (find, grep) with minimal subshells
For any new Git command, add fallback for older versions or guard with detection

Files:

• lib/core.sh

**/*.sh

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

**/*.sh: Always quote paths to handle spaces and special characters; avoid unguarded globbing
Keep set -e active in shell scripts; ensure non-critical failures are guarded with command || true

**/*.sh: Use shebang #!/usr/bin/env bash (not /bin/bash or /bin/sh) for all shell scripts
Use snake_case naming for functions and local variables, UPPER_CASE for constants and environment variables
Use 2-space indentation (no tabs) for all shell scripts
Always quote all variables and paths (e.g., "$var") in shell scripts
Check return codes and use || exit 1 or || return 1 for error handling in shell scripts

Files:

• lib/core.sh

**/*.{bash,fish,sh}

📄 CodeRabbit inference engine (.github/instructions/sh.instructions.md)

**/*.{bash,fish,sh}: Bash 3.2+ compatible (macOS default), but 4.0+ features allowed where appropriate
Always quote variables: use "$var" not $var
Use function-scoped variables: local var="value"
Check return codes; functions return 1 on failure
Use snake_case for functions and variables, UPPER_CASE for constants
Prefer [ ] over [[ ]] for POSIX portability; use [[ only when needed
Always quote glob inputs; disable unintended globbing with set -f temporarily if required
Avoid associative arrays in shell scripts; use simple string/loop constructs for Bash 3.2+ compatibility
Avoid readarray and process substitution unsupported in older Bash
Debug with bash -x ./bin/gtr <cmd> or wrap suspicious blocks with set -x / set +x
Check function presence with declare -f create_worktree or declare -f resolve_target
Use stderr for variable inspection: echo "DEBUG var=$var" >&2 to keep stdout clean for command substitution
Keep dependencies minimal: only use git, sed, awk, find, grep; avoid jq/curl unless justified
Check availability of external commands before use when adding new tools
Use "${var}" for variable expansion; for line loops use while IFS= read -r line; do ... done to preserve spaces
Sanitize branch names via sanitize_branch_name function; do NOT duplicate logic elsewhere
Everything is sourced at startup with set -e enabled; functions call each other directly; no subshells except for hooks and AI tools

Files:

• lib/core.sh

{bin/gtr,lib/**/*.sh,adapters/**/*.sh}

📄 CodeRabbit inference engine (.github/instructions/testing.instructions.md)

{bin/gtr,lib/**/*.sh,adapters/**/*.sh}: All commands must exit 0 (except intentional failures) and produce expected side-effects
No unquoted path errors; spaces must be handled in file paths
Hooks must run only once per creation/removal event

Files:

• lib/core.sh

lib/*.sh

📄 CodeRabbit inference engine (CLAUDE.md)

lib/*.sh: Maintain backwards compatibility with existing configurations when modifying core functionality files
Follow POSIX-compatible Bash patterns targeting Bash 3.2+ in core library files
Use local for function-scoped variables in library files to prevent variable scope leakage
Provide clear error messages via log_error and log_info from lib/ui.sh in library files

Files:

• lib/core.sh

🔇 Additional comments (1)

lib/core.sh (1)

378-378: Correctly silences stdout from intermediate git command.

The change from 2>/dev/null to >/dev/null 2>&1 properly suppresses both stdout and stderr from git branch --track, ensuring this intermediate step doesn't pollute the function's output. Since create_worktree is invoked as WORKTREE_PATH=$(create_worktree ...), any stdout from the tracking command would have been concatenated into the path variable, breaking downstream hooks. The fix is minimal and correct.

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