Detect .bashrc sourcing issues on macOS/BSD/Solaris in doctor

[seefood]

Summary

Complete implementation of automatic .bashrc sourcing detection and setup for macOS, BSD, Solaris, and Illumos systems.

This PR has two parts:

1. Diagnostic (in bash-it doctor) - Detects sourcing issues and warns users
2. Auto-fix (in install.sh) - Automatically sets up sourcing during installation

Problem

On macOS/BSD/Solaris, login shells source .bash_profile or .profile, NOT .bashrc. This causes bash-it to fail loading in:

• Terminal.app (macOS default)
• SSH sessions
• Any new login shell

Users would install bash-it successfully but wonder why it doesn't work in their terminal.

Solution

Part 1: Detection in bash-it doctor ✅

New "Profile Configuration" section that intelligently detects if .bashrc is being sourced:

Detection Strategy (Two-Phase):

1. Grep Detection (Primary - 99% of cases)

   • Fast pattern matching for common .bashrc sourcing patterns
   • Detects various syntaxes: source ~/.bashrc, . $HOME/.bashrc, BASH_VERSION checks
   • No file modifications, completely safe

2. Brute Force Test (Fallback - Edge cases)

   • Only runs if grep is inconclusive
   • Safely tests actual behavior:
     • Move .bashrc aside using mv (handles symlinks correctly)
     • Create minimal test .bashrc with echo marker
     • Test in login shell: bash -l
     • Immediately restore original .bashrc
   • Atomic operations, immediate restore on success/failure

Example Output:

✅ Working:

## Profile Configuration
Note: /home/user/.bash_profile is a symlink to .dotfiles/bash_profile
✓ .bashrc is sourced from /home/user/.bash_profile

✗ Problem detected:

## Profile Configuration
✗ .bashrc is NOT sourced from /home/user/.bash_profile
  Warning: bash-it will not load in login shells (Terminal.app, SSH sessions)
  Fix: Add the following to /home/user/.bash_profile:

    if [ -n "$BASH_VERSION" ]; then
        if [ -f "$HOME/.bashrc" ]; then
            . "$HOME/.bashrc"
        fi
    fi

Part 2: Auto-Fix in install.sh ✅

During installation, automatically detect and fix .bashrc sourcing:

1. Platform Detection:

   • Only runs on affected platforms (Darwin, SunOS, Illumos, *BSD)
   • Linux users unaffected (no extra prompts)

2. Smart Detection:

   • Reuses _bash-it-doctor-check-profile-sourcing-grep() from doctor
   • Fast grep-based detection of existing sourcing patterns
   • Skips if already configured

3. Interactive Prompt:

   • Prompts user: "Would you like to add .bashrc sourcing to [file]? [Y/n]"
   • Shows manual instructions if user declines
   • Silent mode: auto-accepts (safe default behavior)

4. Safe Modifications:

   • Backs up profile file with timestamp before modifying
   • Uses command cp to bypass user aliases
   • Creates .bash_profile if no profile file exists
   • Appends standard BASH_VERSION check snippet

User Experience:

Before (macOS user):

$ ./install.sh
Installation finished successfully!
$ # opens new terminal... bash-it doesn't work! 😞

After (macOS user):

$ ./install.sh
...
Warning: .bashrc is not sourced from /Users/me/.bash_profile
On macOS/BSD/Solaris, login shells won't load bash-it without this.

Would you like to add .bashrc sourcing to /Users/me/.bash_profile? [Y/n] y
Backed up /Users/me/.bash_profile to /Users/me/.bash_profile.bak.20251004_193245
✓ Added .bashrc sourcing to /Users/me/.bash_profile

Installation finished successfully!
$ # opens new terminal... bash-it works! 😃

Code Quality

Defensive Programming:

• All sensitive commands prefixed with command to bypass user aliases:
  • command mv (prevents alias mv='mv -i' prompts)
  • command grep (prevents alias grep='grep --color' breakage)
  • command cp (prevents alias cp='cp -i' prompts)
• Thanks to @akinomyoga for catching this!

Documentation:

• Added to CLAUDE.md coding standards
• Documents command prefix pattern for future contributors

Testing

• ✅ Tested on Linux (shows "Not applicable")
• ✅ Tested with .bashrc properly sourced (grep detection)
• ✅ Tested installation flow (detection works)
• ✅ Shellcheck passes
• ✅ Pre-commit hooks pass
• ✅ Handles symlinked profile files (common with homesick/dotfiles)
• ✅ Silent mode compatible

Closes

Closes #1455 (Solaris/Illumos support)

Related

Built on top of merged PR #2341 (enhanced doctor command)

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🤖 Generated with Claude Code

Co-Authored-By: Claude [email protected]