Add installation support for Mac, Fedora, and Arch-based distros

git-comsu

@@ -18,6 +18,8 @@ fi
 # URL of the Google Generative AI API endpoint
 API_URL="https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash-latest:generateContent?key=$GOOGLE_AI_STUDIO_API_KEY"
 
+INSTALL_DIR="$(dirname "$(realpath "$0")")"
+
 # Function to get the staged changes from Git
 get_staged_changes() {
     # Get the staged changes using git diff --cached
@@ -32,7 +34,7 @@ get_staged_changes() {
 # Function to generate commit messages using Google Generative AI
 generate_commit_messages() {
     local changes="$1"
-    PROMPT_FILE="/usr/local/share/git-comsu/prompt"
+    PROMPT_FILE="${INSTALL_DIR:-/usr/local/share/git-comsu}/prompt"
 
     # Check if the prompt file exists
     if [[ ! -f "$PROMPT_FILE" ]]; then

install.sh

@@ -1,29 +1,156 @@
-#!/bin/bash
+#!/usr/bin/env bash
+
+# Get the folder where the script is located
+MYFOLDER=$(dirname "$(realpath "$0")")
+
+# Error codes
+E_OS_NOT_IDENTIFIED=1
+E_JQ_NOT_FOUND=2
+E_PROMPT_CREATION_FAIL=3
+E_GIT_COMSU_CREATION_FAIL=4
+E_PERMISSION_FAIL=5
+E_FAIL_INSTALL_JQ=6
+E_BREW_IS_NOT_INSTALLED=7
+
+
+# Function to check if a command exists
+command_exists() {
+    command -v "$1" >/dev/null 2>&1
+}
+
+# Error handling function
+error_exit() {
+    echo "$1" >&2
+    exit "${2:-1}" # Default exit status is 1 if not provided
+}
+
+# Function to check if two directories are on the same filesystem
+check_same_filesystem() {
+    dir1="$1"
+    dir2="$2"
+
+    # Get the filesystem device for each directory
+    fs1=$( df "$dir1" | tail  -1 | awk '{print $1}')
+    fs2=$( df "$dir2" | tail  -1 | awk '{print $1}')
+
+    # Compare the filesystem devices
+    if [[ "$fs1" == "$fs2" ]]; then
+        return 0 # Same filesystem
+    else
+        return 1 # Different filesystems
+    fi
+}
+
+# Package installers
+install_requirements_mac() {
+    if ! command_exists brew; then
+        error_exit "Homebrew is not installed. Please install it from https://brew.sh/." $E_BREW_IS_NOT_INSTALLED
+    fi
+    brew install jq awk
+}
+
+install_requirements_debian(){
+    sudo apt-get update -y && sudo apt-get install -y jq || error_exit "Can not install jq" $E_FAIL_INSTALL_JQ
+}
+
+install_requirements_fedora(){
+    sudo dnf update -y && sudo dnf install -y jq || error_exit "Can not install jq" $E_FAIL_INSTALL_JQ
+}
+
+install_requirements_arch(){
+    sudo pacman -Syu --noconfirm jq || error_exit "Can not install jq" $E_FAIL_INSTALL_JQ
+}
+
+MYOS="unknown"
+SUDO="sudo"
+SHARE_DIR="/usr/local/share/git-comsu"
+
+# Identify the OS and set the MYOS variable and set proper folder for install
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    MYOS="mac"  # macOS
+    SUDO=""
+    SHARE_DIR="${HOME}/.local/bin/git-comsu"
+elif [[ -f /etc/debian_version ]]; then
+    MYOS="debian"  # Debian-based
+elif [[ -f /etc/fedora-release ]]; then
+    MYOS="fedora"  # Fedora-based
+elif command_exists pacman; then
+    MYOS="arch"  # Arch-based (if pacman is available)
+else
+    error_exit "OS not identified. Supported OS types are macOS, Debian-based (include Ubuntu), Fedora-based, and Arch-based systems." $E_OS_NOT_IDENTIFIED
+fi
+
+# Output the result
+echo "Operating System identified as: $MYOS"
+
+# Check target folder is in the same file system of source files
+CREATE_COMMAND="ln"
+if ! check_same_filesystem "$MYFOLDER" "$SHARE_DIR"; then
+    CREATE_COMMAND="cp"
+    echo "Note: $MYFOLDER and $SHARE_DIR are on different filesystems. Will use copy."
+fi
 
 # Check if jq is installed; if not, install it
-if ! command -v jq &> /dev/null; then
+if ! command_exists jq; then
     echo "jq not found, installing..."
-    sudo apt-get update
-    sudo apt-get install -y jq
+    install_requirements_${MYOS}
+    if ! command_exists jq; then
+        error_exit "Even after install jq can not find it. check it and try again. It is a requirement." $E_JQ_NOT_FOUND
+    fi
 else
     echo "jq is already installed."
 fi
 
 # Create a directory for shared files
-SHARE_DIR="/usr/local/share/git-comsu"
 if [ ! -d "$SHARE_DIR" ]; then
-    echo "Creating directory for shared files at $SHARE_DIR..."
-    sudo mkdir -p "$SHARE_DIR"
+    echo "Creating directory for shared files at ${SHARE_DIR} ..."
+    $SUDO mkdir -p "${SHARE_DIR}"
 fi
 
 # Copy prompt to the shared directory
-echo "Copying prompt file to $SHARE_DIR..."
-sudo cp prompt "$SHARE_DIR/"
+if [ ! -f "${SHARE_DIR}/prompt" ]; then
+    echo "Creating prompt file in ${SHARE_DIR} ..."
+    $SUDO $CREATE_COMMAND "${MYFOLDER}/prompt" "${SHARE_DIR}/prompt" || error_exit "cannot create prompt file" $E_PROMPT_CREATION_FAIL
+fi
 
 # Make git-comsu executable and copy it to /usr/local/bin
-echo "Installing git-comsu script to /usr/local/bin..."
-sudo cp git-comsu /usr/local/bin/git-comsu
-sudo chmod +x /usr/local/bin/git-comsu
+echo "Installing git-comsu script to ${SHARE_DIR} ..."
+if [ ! -f "${SHARE_DIR}/git-comsu" ]; then
+    $SUDO $CREATE_COMMAND "${MYFOLDER}/git-comsu" "${SHARE_DIR}/git-comsu" || error_exit "cannot create git-comsu" $E_GIT_COMSU_CREATION_FAIL
+fi
+
+# Set execute permissions for the script
+if [ ! -x "${SHARE_DIR}/git-comsu" ]; then
+    chmod +x "${SHARE_DIR}/git-comsu" 2>/dev/null || $SUDO chmod +x "${SHARE_DIR}/git-comsu" || error_exit "can not make git-omsu exectuable." $E_PERMISSION_FAIL 
+fi
 
 echo
-echo "Installation completed. You can now run 'git comsu' command."
+echo "Installation completed. You can now run the 'git-comsu' command. Make sure ${SHARE_DIR} exists in the PATH."
+
+# Detect shell and set the appropriate shell configuration file
+MY_SHELL=$(basename "$SHELL")
+case "$MY_SHELL" in
+    zsh)
+        SHELL_CONFIG="${HOME}/.zshrc"
+        ;;
+    bash)
+        SHELL_CONFIG="${HOME}/.bashrc"
+        ;;
+    fish)
+        SHELL_CONFIG="${HOME}/.config/fish/config.fish"
+        ;;
+    tcsh)
+        SHELL_CONFIG="${HOME}/.cshrc"
+        ;;
+    ksh)
+        SHELL_CONFIG="${HOME}/.kshrc"
+        ;;
+    *)
+        SHELL_CONFIG="your shell's initialization file"
+        ;;
+esac
+
+# Suggest adding the path to the user's environment
+echo "Add the following to your shell configuration if not already in your ${SHELL_CONFIG}:"
+echo "export PATH=\$PATH:${SHARE_DIR}"
+echo "Once added, run 'source ${SHELL_CONFIG}' to apply the changes immediately."