Add upgrade command - self-upgrade via GitHub releases

Author: devalade

lib/commands/help.sh

@@ -22,6 +22,7 @@ Commands:
     rollback [N]        Rollback to previous release (or N steps back)
     releases            List all available releases
     migrate             Migrate existing deployment to release structure
+    upgrade             Upgrade ShipNode to latest version
     help                Show this help message
 
 User Management:

lib/commands/main.sh

@@ -58,6 +58,9 @@ main() {
         mkpasswd)
             cmd_mkpasswd
             ;;
+        upgrade)
+            cmd_upgrade
+            ;;
         help|--help|-h)
             cmd_help
             ;;

lib/commands/upgrade.sh

@@ -0,0 +1,104 @@
+cmd_upgrade() {
+    local repo_url="https://github.com/devalade/shipnode"
+    local latest_url="$repo_url/releases/latest/download/shipnode-installer.sh"
+    local temp_dir="/tmp/shipnode-upgrade-$$"
+
+    info "Checking for updates..."
+
+    # Fetch latest version from GitHub API
+    local latest_version
+    local api_response
+    local http_code
+
+    # Use -w to get HTTP status code, -s for silent, -S to show errors
+    api_response=$(curl -sSL -w "\n%{http_code}" "https://api.github.com/repos/devalade/shipnode/releases/latest" 2>/dev/null)
+    http_code=$(echo "$api_response" | tail -n1)
+    api_response=$(echo "$api_response" | head -n-1)
+
+    if [ "$http_code" = "404" ]; then
+        error "No releases available yet. Please check $repo_url/releases"
+    elif [ "$http_code" != "200" ]; then
+        error "Failed to fetch latest version from GitHub (HTTP $http_code)"
+    fi
+
+    # Extract version from tag_name field (e.g., "v1.2.0" -> "1.2.0")
+    if command -v jq &> /dev/null; then
+        # Use jq for robust JSON parsing
+        latest_version=$(echo "$api_response" | jq -r '.tag_name' 2>/dev/null | sed 's/^v//')
+    else
+        # Fallback to grep for systems without jq
+        latest_version=$(echo "$api_response" | grep -oP '"tag_name":\s*"v?\K[0-9.]+' | head -n1)
+    fi
+
+    if [ -z "$latest_version" ] || [ "$latest_version" = "null" ]; then
+        error "Failed to parse version from GitHub API response"
+    fi
+
+    # Compare with current VERSION
+    if [[ "$latest_version" == "$VERSION" ]]; then
+        success "Already on latest version (v$VERSION)"
+        return 0
+    fi
+
+    info "Current: v$VERSION → Latest: v$latest_version"
+
+    # Create temp directory
+    mkdir -p "$temp_dir"
+
+    # Download latest installer
+    info "Downloading ShipNode v$latest_version..."
+    if ! curl -fsSL "$latest_url" -o "$temp_dir/shipnode-installer.sh"; then
+        rm -rf "$temp_dir"
+        error "Failed to download installer from $latest_url"
+    fi
+
+    # Extract the installer (it's a self-extracting script)
+    info "Extracting installer..."
+
+    # The installer has a base64 payload after __SHIPNODE_PAYLOAD__ marker
+    # Extract and decode it
+    local payload_marker="__SHIPNODE_PAYLOAD__"
+    local payload_start
+    payload_start=$(grep -n "^${payload_marker}$" "$temp_dir/shipnode-installer.sh" | head -n1 | cut -d: -f1)
+
+    if [ -z "$payload_start" ]; then
+        rm -rf "$temp_dir"
+        error "Invalid installer format: payload marker not found"
+    fi
+
+    # Extract base64 payload and decode
+    payload_start=$((payload_start + 1))
+    if ! tail -n "+${payload_start}" "$temp_dir/shipnode-installer.sh" | base64 -d | tar -xz -C "$temp_dir"; then
+        rm -rf "$temp_dir"
+        error "Failed to extract installer payload"
+    fi
+
+    # Verify extraction
+    if [ ! -f "$temp_dir/shipnode" ] || [ ! -d "$temp_dir/lib" ]; then
+        rm -rf "$temp_dir"
+        error "Extracted files are incomplete"
+    fi
+
+    # Install to SHIPNODE_DIR (overwrite existing installation)
+    info "Installing to $SHIPNODE_DIR..."
+
+    # Copy files
+    cp -r "$temp_dir/shipnode" "$SHIPNODE_DIR/" || {
+        rm -rf "$temp_dir"
+        error "Failed to copy shipnode entry point"
+    }
+
+    cp -r "$temp_dir/lib" "$SHIPNODE_DIR/" || {
+        rm -rf "$temp_dir"
+        error "Failed to copy lib directory"
+    }
+
+    # Ensure executable
+    chmod +x "$SHIPNODE_DIR/shipnode"
+
+    # Cleanup
+    rm -rf "$temp_dir"
+
+    success "Upgraded to ShipNode v$latest_version"
+    info "Restart your shell or run 'hash -r' to refresh the command cache"
+}

shipnode

@@ -35,6 +35,7 @@ source "$LIB_DIR/commands/unlock.sh"
 source "$LIB_DIR/commands/rollback.sh"
 source "$LIB_DIR/commands/migrate.sh"
 source "$LIB_DIR/commands/env.sh"
+source "$LIB_DIR/commands/upgrade.sh"
 source "$LIB_DIR/commands/help.sh"
 
 # Source and run main entry point