Initial release

root/etc/s6-overlay/s6-rc.d/init-mod-universal-redis-add-package/run

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+#!/usr/bin/with-contenv bash
+
+# This is the init file used for adding os or pip packages to install lists.
+# It takes advantage of the built-in init-mods-package-install init script that comes with the baseimages.
+# If using this, we need to make sure we set this init as a dependency of init-mods-package-install so this one runs first
+
+if ! command -v redis; then
+    ## Ubuntu
+    if [ -f /usr/bin/apt ]; then
+        echo "\
+            redis" >> /mod-repo-packages-to-install.list
+    fi
+    # Alpine
+    if [ -f /sbin/apk ]; then
+        echo "\
+            redis" >> /mod-repo-packages-to-install.list
+    fi
+else
+    echo "**** redis already installed, skipping ****"
+fi

root/etc/s6-overlay/s6-rc.d/init-mod-universal-redis-add-package/type

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+oneshot

root/etc/s6-overlay/s6-rc.d/init-mod-universal-redis-add-package/up

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+/etc/s6-overlay/s6-rc.d/init-mod-universal-redis-add-package/run