#!/bin/bash

# Grafana install hooks — pre-flight prereq check + post-start 0777 on the
# storage folder so Grafana can write its sqlite db regardless of host UID.

grafana_install_pre()
{
    local app_name="$1"
    if ! appInstallCheckRequirements "$app_name" "$CFG_GRAFANA_REQUIRES"; then
        grafana=n
        return 1
    fi
}

grafana_install_post_start()
{
    local app_name="$1"
    # The DIRECTORY, not its contents. Grafana runs as uid 472, which rootless
    # maps to a subuid this user has no authority over; it needs write on the dir
    # itself to create grafana.db and its plugin/png dirs on first boot, and from
    # then on those files are its own. `chmod -R` walked them as the docker
    # install user and failed per file with "Operation not permitted", failing the
    # step on every reinstall — while a fresh install passed, because the dir was
    # still empty. Grafana's files must keep Grafana's ownership regardless.
    if [ -d "$(appDir grafana)/grafana_storage" ]; then
        local result
        result=$(runFileOp chmod 0777 "$(appDir grafana)/grafana_storage")
        checkSuccess "Set permissions to grafana_storage folder."
    fi
}