kasm: survive a failed release lookup and answer the installer with flags

The lookup ran under pipefail with no timeout: a page without the link
ended the install at `head -1`, a stalled connection hung it for half an
hour, and the fallback version never ran. The installer takes
--accept-eula, --no-swap-check and --no-check-disk; piped answers
shifted with the prompts, and a "y" to the swap question tried swapon
inside the container.

install/kasm-install.sh

@@ -37,10 +37,10 @@ fi
 msg_ok "Installed Docker"
 
 msg_info "Detecting latest Kasm Workspaces release"
-KASM_URL=$(curl -s https://kasm.com/downloads \
+KASM_URL=$(curl -s --max-time 30 https://kasm.com/downloads \
   | grep -oP 'https://kasm-static-content\.s3\.amazonaws\.com/kasm_release_\d+\.\d+\.\d+-latest\.tar\.gz' \
-  | head -1)
-KASM_VERSION=$(echo "$KASM_URL" | grep -oP '\d+\.\d+\.\d+(?=-latest)')
+  | head -1 || true)
+KASM_VERSION=$(echo "$KASM_URL" | grep -oP '\d+\.\d+\.\d+(?=-latest)' || true)
 
 # Fallback to predefined version if online lookup failed.
 if [[ -z "$KASM_VERSION" ]] || [[ -z "$KASM_URL" ]]; then
@@ -63,7 +63,7 @@ curl_download "/opt/kasm_release_${KASM_VERSION}.tar.gz" "$KASM_URL"
 cd /opt
 tar -xf "kasm_release_${KASM_VERSION}.tar.gz"
 chmod +x /opt/kasm_release/install.sh
-printf 'y\ny\ny\n4\n' | bash /opt/kasm_release/install.sh --ignore-dep-failures >~/kasm-install.output 2>&1
+bash /opt/kasm_release/install.sh --accept-eula --no-swap-check --no-check-disk --ignore-dep-failures >~/kasm-install.output 2>&1
 awk '
   /^Kasm UI Login Credentials$/ {capture=1}
   capture {print}

install/postgresql-install.sh

@@ -14,11 +14,9 @@ network_check
 update_os
 
 setup_deb_based() {
-  ver="${var_postgresql_version:-}"
-  [[ -n "$ver" ]] || read -r -p "${TAB3}Enter PostgreSQL version (15/16/17/18) [17]: " ver || true
-  ver="${ver:-17}"
+  read -r -p "${TAB3}Enter PostgreSQL version (15/16/17/18): " ver
   [[ $ver =~ ^(15|16|17|18)$ ]] || {
-    msg_error "Invalid PostgreSQL version: ${ver} (expected 15, 16, 17 or 18)"
+    echo "Invalid version"
     exit 64
   }
   PG_VERSION=$ver setup_postgresql
@@ -138,13 +136,8 @@ EOF
 }
 
 setup_alpine() {
-  ver="${var_postgresql_version:-}"
-  [[ -n "$ver" ]] || read -r -p "${TAB3}Enter PostgreSQL version (16/17/18) [17]: " ver || true
-  ver="${ver:-17}"
-  [[ $ver =~ ^(16|17|18)$ ]] || {
-    msg_error "Invalid PostgreSQL version: ${ver} (expected 16, 17 or 18)"
-    exit 64
-  }
+  read -r -p "${TAB3}Enter PostgreSQL version (15/16/17): " ver
+  [[ $ver =~ ^(15|16|17)$ ]] || { echo "Invalid version"; exit 64; }
 
   msg_info "Installing PostgreSQL ${ver}"
   $STD apk add --no-cache postgresql${ver} postgresql${ver}-contrib postgresql${ver}-openrc sudo