feat(scripts): implement Homebrew script generator and integration

src/lib/generateInstallScript.ts

@@ -12,6 +12,7 @@ import {
     generateNixScript,
     generateFlatpakScript,
     generateSnapScript,
+    generateHomebrewScript,
 } from './scripts';
 
 interface ScriptOptions {
@@ -39,6 +40,7 @@ export function generateInstallScript(options: ScriptOptions): string {
         case 'nix': return generateNixScript(packages);
         case 'flatpak': return generateFlatpakScript(packages);
         case 'snap': return generateSnapScript(packages);
+        case 'homebrew': return generateHomebrewScript(packages);
         default: return '#!/bin/bash\necho "Unsupported distribution"\nexit 1';
     }
 }
@@ -61,6 +63,18 @@ export function generateSimpleCommand(selectedAppIds: Set<string>, distroId: Dis
         case 'snap':
             if (packages.length === 1) return `sudo snap install ${pkgList}`;
             return packages.map(p => `sudo snap install ${p.pkg}`).join(' && ');
+        case 'homebrew': {
+            const formulae = packages.filter(p => !p.pkg.startsWith('--cask '));
+            const casks = packages.filter(p => p.pkg.startsWith('--cask '));
+            const parts = [];
+            if (formulae.length > 0) {
+                parts.push(`brew install ${formulae.map(p => p.pkg).join(' ')}`);
+            }
+            if (casks.length > 0) {
+                parts.push(`brew install --cask ${casks.map(p => p.pkg.replace('--cask ', '')).join(' ')}`);
+            }
+            return parts.join(' && ') || '# No packages selected';
+        }
         default: return `# Install: ${pkgList}`;
     }
 }

src/lib/scripts/homebrew.ts

@@ -0,0 +1,120 @@
+// Homebrew script - brew with cask support for macOS + formulae for both platforms
+
+import { generateAsciiHeader, generateSharedUtils, escapeShellString, type PackageInfo } from './shared';
+
+export function generateHomebrewScript(packages: PackageInfo[]): string {
+    return generateAsciiHeader('Homebrew', packages.length) + generateSharedUtils(packages.length) + `
+# Platform detection
+IS_MACOS=false
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    IS_MACOS=true
+fi
+
+# Safety check: Homebrew should not be run as root
+if [ "$EUID" -eq 0 ]; then
+    error "Homebrew should not be run as root. Please run as a normal user."
+    exit 1
+fi
+
+is_installed() {
+    local type=$1
+    local pkg=$2
+    # brew list returns 0 if installed, 1 if not. Suppress output.
+    # We use grep -Fxq for exact line matching to handle regex chars in names
+    if [ "$type" == "--cask" ]; then
+        brew list --cask 2>/dev/null | grep -Fxq "$pkg"
+    else
+        brew list --formula 2>/dev/null | grep -Fxq "$pkg"
+    fi
+}
+
+install_package() {
+    local name=$1
+    local pkg=$2
+    local type=$3 # "" (formula) or "--cask"
+    
+    CURRENT=$((CURRENT + 1))
+    
+    # Casks are macOS only
+    if [ "$type" == "--cask" ] && [ "$IS_MACOS" = false ]; then
+        # Silent skip or minimal output for cleaner Linux logs?
+        # Using minimal output to let user know it was skipped intentionally
+        printf "\\r\\033[K\${YELLOW}○\${NC} %s \${DIM}(cask skipped on Linux)\${NC}\\n" "$name"
+        SKIPPED+=("$name")
+        return 0
+    fi
+    
+    if is_installed "$type" "$pkg"; then
+        skip "$name"
+        SKIPPED+=("$name")
+        return 0
+    fi
+    
+    show_progress $CURRENT $TOTAL "$name"
+    local start=$(date +%s)
+    
+    # Construct brew command
+    local cmd="brew install"
+    if [ "$type" == "--cask" ]; then
+        cmd="brew install --cask"
+    fi
+    
+    local output
+    if output=$(with_retry $cmd "$pkg" 2>&1); then
+        local elapsed=$(($(date +%s) - start))
+        update_avg_time $elapsed
+        printf "\\r\\033[K"
+        timing "$name" "$elapsed"
+        SUCCEEDED+=("$name")
+    else
+        printf "\\r\\033[K\${RED}✗\${NC} %s\\n" "$name"
+        
+        # Friendly error messages
+        if echo "$output" | grep -q "No available formula"; then
+            echo -e "    \${DIM}Formula not found\${NC}"
+        elif echo "$output" | grep -q "No Cask with this name"; then
+             echo -e "    \${DIM}Cask not found\${NC}"
+        fi
+        
+        FAILED+=("$name")
+    fi
+}
+
+# ─────────────────────────────────────────────────────────────────────────────
+#  Pre-flight
+# ─────────────────────────────────────────────────────────────────────────────
+
+command -v brew &>/dev/null || { 
+    error "Homebrew not found. Install from https://brew.sh"
+    exit 1 
+}
+
+if [ "$IS_MACOS" = true ]; then
+    info "Detected macOS - casks enabled"
+else
+    info "Detected Linux - formulae only (casks will be skipped)"
+fi
+
+info "Updating Homebrew..."
+# Run update silently; on error warn but continue (network flakes shouldn't block install)
+brew update >/dev/null 2>&1 && success "Updated" || warn "Update failed, continuing..."
+
+# ─────────────────────────────────────────────────────────────────────────────
+#  Installation
+# ─────────────────────────────────────────────────────────────────────────────
+
+echo
+info "Installing $TOTAL packages"
+echo
+
+${packages.map(({ app, pkg }) => {
+        if (pkg.startsWith('--cask ')) {
+            const caskName = pkg.replace('--cask ', '');
+            return `install_package "${escapeShellString(app.name)}" "${caskName}" "--cask"`;
+        }
+        return `install_package "${escapeShellString(app.name)}" "${pkg}" ""`;
+    }).join('\n')}
+
+print_summary
+`;
+}

src/lib/scripts/index.ts

@@ -9,3 +9,4 @@ export { generateOpenSUSEScript } from './opensuse';
 export { generateNixScript } from './nix';
 export { generateFlatpakScript } from './flatpak';
 export { generateSnapScript } from './snap';
+export { generateHomebrewScript } from './homebrew';