anyzig wrapper with default zig version (It's writen with AI, so free to suggest ANY improments)

zig

#!/usr/bin/env sh

# Anyzig wrapper script with default version support
# Compatible with: Bash, Zsh, Fish, and other POSIX shells
#
# Installation:
#   1. Save this script as 'zig' (or any name you prefer)
#   2. Make it executable: chmod +x zig
#   3. Place it in your PATH before the actual zig executable
#   4. Set ZIG_DEFAULT_VERSION environment variable (optional)
#
# Usage:
#   export ZIG_DEFAULT_VERSION="0.15.1"  # Set your default version
#   zig build                             # Uses version from build.zig.zon or default
#   zig 0.15.0 build                      # Explicitly specify version

# Configuration: Set your default Zig version here or via environment variable
# You can set this in your shell rc file (.bashrc, .zshrc, config.fish)
DEFAULT_VERSION="${ZIG_DEFAULT_VERSION:-0.15.1}"

# Path to the actual anyzig executable
# Adjust this if anyzig is installed in a different location
ANYZIG_CMD="anyzig"

# Check if anyzig is available
if ! command -v "$ANYZIG_CMD" >/dev/null 2>&1; then
    echo "Error: anyzig not found in PATH" >&2
    echo "Please install anyzig first" >&2
    exit 1
fi

# Function to check if first argument looks like a version number
is_version() {
    case "$1" in
        [0-9]*.[0-9]*.[0-9]*|[0-9]*.[0-9]*.[0-9]*-dev.*)
            return 0
            ;;
        *)
            return 1
            ;;
    esac
}

# Check if first argument is already a version
if [ $# -gt 0 ] && is_version "$1"; then
    # Version already specified, pass through to anyzig
    exec "$ANYZIG_CMD" "$@"
fi

# Try to run anyzig without version first
# If it fails with the "no build.zig" error, retry with default version
"$ANYZIG_CMD" "$@" 2>&1 | {
    output=""
    has_error=0
    
    while IFS= read -r line; do
        output="${output}${line}
"
        if echo "$line" | grep -q "no build.zig to pull a zig version from"; then
            has_error=1
        fi
    done
    
    if [ $has_error -eq 1 ]; then
        # Rerun with default version
        exec "$ANYZIG_CMD" "$DEFAULT_VERSION" "$@"
    else
        # Print captured output and exit with anyzig's exit code
        printf "%s" "$output"
        exit $?
    fi
}