get chrome sign key from env

.drone.yml

@@ -3,6 +3,9 @@ name: default
 steps:
 - name: compile-chrome
   image: roypur/chrome-packer:latest
+  environment:
+    CHROME_PRIVKEY:
+      from_secret: chrome_privkey
   commands:
     - ./pack-chrome.sh
 - name: gitea_release

pack-chrome.sh

@@ -5,6 +5,13 @@ temp_dir="/tmp/${temp_name}"
 chrome_dir="${temp_dir}/chrome"
 mkdir -p "${chrome_dir}"
 
+if [[ "${CHROME_PRIVKEY}test" == "test" ]]
+then
+    cp "${HOME}/keys/chrome-privkey.pem" "${temp_dir}/privkey.pem"
+else
+    echo "${CHROME_PRIVKEY}" > "${temp_dir}/privkey.pem"
+fi
+
 if [[ "${DBUS_SESSION_BUS_ADDRESS}test" == "test" ]]
 then
     export DBUS_SYSTEM_BUS_ADDRESS="unix:path=${temp_dir}/dbus-system.sock"
@@ -27,6 +34,6 @@ then
     browser=$(which chromium 2> /dev/null)
 fi
 
-${browser} --disable-gpu --no-sandbox --user-data-dir=${chrome_dir} --pack-extension="${dir}/chrome" --pack-extension-key=${HOME}/keys/privkey.pem
+${browser} --disable-gpu --no-sandbox --user-data-dir=${chrome_dir} --pack-extension="${dir}/chrome" --pack-extension-key="${temp_dir}/privkey.pem"
 
 rm -rf ${temp_dir}