Scripts/shal

#!/bin/sh

# Script:       shal
# License:      MIT
# Author:       Arkaprabha Chakraborty
# Created:      30-08-24
# Dependencies: zsh, rofi
#
# Copyright (C) 2024 Arkaprabha Chakraborty

set -eu

# Function to print error messages
error() {
    printf "%s\n" "$1" >&2
}

# Function to get aliases from .zshrc
get_aliases() {
    if [ ! -f "$HOME/.zshrc" ]; then
        error "Error: $HOME/.zshrc not found."
        exit 1
    fi
    sed -n '/^# non-interactive aliases/,$p' "$HOME/.zshrc" | grep '^alias ' | sed 's/alias \([^=]*\)=.*/\1/'
}

# Function to get user input using rofi
get_user_input() {
    if ! command -v rofi >/dev/null 2>&1; then
        error "Error: rofi is not installed or not in PATH."
        exit 1
    fi
    printf "%s" "$1" | rofi -dmenu -i -p "Zsh alias"
}

# Function to extract alias and arguments
parse_input() {
    input="$1"
    alias=$(printf "%s" "$input" | awk '{print $1}')
    arguments=$(printf "%s" "$input" | awk '{$1=""; print $0}' | sed 's/^ *//')
    printf "%s\n%s" "$alias" "$arguments"
}

# Function to get the command for an alias
get_alias_command() {
    alias="$1"
    grep "^alias $alias=" "$HOME/.zshrc" | sed "s/^alias $alias='\(.*\)'/\1/"
}

# Main function
main() {
    aliases=$(get_aliases)
    input=$(get_user_input "$aliases")
    
    if [ -z "$input" ]; then
        exit 0
    fi
    
    parsed_input=$(parse_input "$input")
    selected_alias=$(printf "%s" "$parsed_input" | sed -n '1p')
    arguments=$(printf "%s" "$parsed_input" | sed -n '2p')
    
    command=$(get_alias_command "$selected_alias")
    
    if [ -z "$command" ]; then
        error "Error: Alias '$selected_alias' not found."
        exit 1
    fi
    
    if ! command -v zsh >/dev/null 2>&1; then
        error "Error: zsh is not installed or not in PATH."
        exit 1
    fi
    
    zsh -c "$command $arguments"
}

main