feat: add update command

README.md

@@ -112,6 +112,14 @@ dotman
 ```
 Leave the rest to it.
 
+### Commands
+
+| Command | Description |
+|---------|-------------|
+| `dotman` | Run the interactive dotfiles manager |
+| `dotman version` | Show current version |
+| `dotman update` | Update dotman to the latest version |
+
 
 ## What else 👀
 

dotman.sh

@@ -262,5 +262,15 @@ if [[ $1 == "version" || $1 == "--version" || $1 == "-v" ]]; then
 	exit
 fi
 
+if [[ $1 == "update" || $1 == "--update" || $1 == "-u" ]]; then
+	if [[ -f "$HOME/dotman/tools/update.sh" ]]; then
+		sh "$HOME/dotman/tools/update.sh"
+	else
+		echo "${BOLD}[❌] Update script not found${RESET}"
+		echo "Try reinstalling dotman."
+	fi
+	exit
+fi
+
 intro
 init_check

tools/update.sh

@@ -0,0 +1,96 @@
+#!/bin/env sh
+
+# Script for updating dotman
+#
+# This script can be run via:
+#   dotman update
+# or directly:
+#   sh ~/dotman/tools/update.sh
+#
+# Respects the following environment variables:
+#   DOTMAN  - path to the dotman repository folder (default: $HOME/dotman)
+#   REPO    - name of the GitHub repo (default: Bhupesh-V/dotman)
+#   BRANCH  - the main branch of upstream dotman repo (default: master)
+
+DOTMAN=${DOTMAN:-$HOME/dotman}
+REPO=${REPO:-Bhupesh-V/dotman}
+BRANCH=${BRANCH:-master}
+REMOTE="https://github.com/${REPO}.git"
+
+# check if tput exists
+if ! command -v tput > /dev/null 2>&1; then
+    BOLD=""
+    RESET=""
+    FG_GREEN=""
+    FG_YELLOW=""
+else
+    BOLD=$(tput bold)
+    RESET=$(tput sgr0)
+    FG_GREEN=$(tput setaf 2)
+    FG_YELLOW=$(tput setaf 3)
+fi
+
+check_dotman_dir() {
+    if [ ! -d "$DOTMAN" ]; then
+        printf "%s\n" "${BOLD}[❌] dotman is not installed at $DOTMAN${RESET}"
+        printf "%s\n" "Run the install script first."
+        exit 1
+    fi
+}
+
+check_git() {
+    if ! command -v git > /dev/null 2>&1; then
+        printf "%s\n" "${BOLD}[❌] Git is required but not installed${RESET}"
+        exit 1
+    fi
+}
+
+get_current_version() {
+    if [ -d "$DOTMAN/.git" ]; then
+        git -C "$DOTMAN" describe --tags --abbrev=0 2>/dev/null || echo "unknown"
+    else
+        echo "unknown"
+    fi
+}
+
+get_latest_version() {
+    git ls-remote --refs --tags --sort='-v:refname' "$REMOTE" 2>/dev/null | head -n 1 | sed 's/.*refs\/tags\///'
+}
+
+update_dotman() {
+    current_version=$(get_current_version)
+    latest_version=$(get_latest_version)
+
+    printf "\n%s\n" "${BOLD}Checking for updates...${RESET}"
+    printf "%s\n" "Current version: ${FG_YELLOW}${current_version}${RESET}"
+    printf "%s\n" "Latest version:  ${FG_GREEN}${latest_version}${RESET}"
+
+    if [ "$current_version" = "$latest_version" ]; then
+        printf "\n%s\n" "${BOLD}${FG_GREEN}[✔️ ] dotman is already up to date!${RESET}"
+        return 0
+    fi
+
+    if [ -z "$latest_version" ]; then
+        printf "\n%s\n" "${BOLD}[❌] Could not fetch latest version${RESET}"
+        return 1
+    fi
+
+    printf "\n%s\n" "${BOLD}Updating dotman...${RESET}"
+
+    git -C "$DOTMAN" fetch --tags --force
+
+    if git -C "$DOTMAN" checkout "$latest_version" 2>/dev/null; then
+        printf "\n%s\n" "${BOLD}${FG_GREEN}[✔️ ] Successfully updated dotman to ${latest_version}${RESET}"
+    else
+        printf "\n%s\n" "${BOLD}[❌] Failed to update dotman${RESET}"
+        return 1
+    fi
+}
+
+main() {
+    check_dotman_dir
+    check_git
+    update_dotman
+}
+
+main