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#!rsc
# RouterOS script: script-updates
# Copyright (c) 2013-2019 Christian Hesse <mail@eworm.de>
#
# update installed scripts from file or url

:global GlobalConfigVersion;
:global ExpectedConfigVersion;
:global Identity;
:global ScriptUpdatesFetch;
:global ScriptUpdatesBaseUrl;
:global ScriptUpdatesUrlSuffix;
:global ScriptUpdatesIgnore;

:global SendNotification;

:foreach Script in=[ / system script find ] do={
  :local Ignore 0;
  :local ScriptName [ / system script get $Script name ];
  :local ScriptPolicy [ / system script get $Script policy ];
  :local ScriptFile [ / file find where name=("script-updates/" . $ScriptName) ];
  :local SourceNew;
  :if ([ :len $ScriptFile ] > 0) do={
    :set SourceNew [ / file get $ScriptFile content ];
    / file remove $ScriptFile;
  }

  :foreach Scheduler in=[ / system scheduler find where on-event=$ScriptName ] do={
    :local SchedulerName [ / system scheduler get $Scheduler name ];
    :local SchedulerPolicy [ / system scheduler get $Scheduler policy ];
    :if ($ScriptPolicy != $SchedulerPolicy) do={
      :log warning ("Policies differ for script " . $ScriptName . \
        " and its scheduler " . $SchedulerName . "!");
    }
  }

  :if ([ :len $SourceNew ] = 0 && $ScriptUpdatesFetch = true) do={
    :foreach IgnoreLoop in=$ScriptUpdatesIgnore do={
      :if ($IgnoreLoop = $ScriptName) do={ :set Ignore 1; }
    }

    :if ($Ignore = 0) do={
      :log debug ("Fetching script from url: " . $ScriptName);
      :do {
        :local Result [ / tool fetch check-certificate=yes-without-crl \
            ($ScriptUpdatesBaseUrl . $ScriptName . $ScriptUpdatesUrlSuffix) \
            output=user as-value ];
        :if ($Result->"status" = "finished") do={
          :set SourceNew ($Result->"data");
        }
      } on-error={
        :log info ("Failed fetching " . $ScriptName);
      }
    }
  }

  :if ([ :len $SourceNew ] > 0) do={
    :if ([ :pick $SourceNew 0 5 ] = "#!rsc") do={
      :local SourceCurrent [ / system script get $Script source ];
      :if ($SourceNew != $SourceCurrent) do={
        :local DontRequirePermissions \
            ($SourceNew~"\n# requires: dont-require-permissions=yes\n");
        :log info ("Updating script: " . $ScriptName);
        / system script set owner=$ScriptName source=$SourceNew \
            dont-require-permissions=$DontRequirePermissions $Script;
        :if ($ScriptName = "global-functions") do={
          / system script run global-functions;
        }
      } else={
        :log debug ("Script " .  $ScriptName . " did not change.");
      }
    } else={
      :log warning ("Looks like new script " . $ScriptName . " is not valid. Ignoring!");
    }
  } else={
    :log debug ("No update for script " . $ScriptName . ".");
  }
}

:if ($GlobalConfigVersion < $ExpectedConfigVersion) do={
  :global GlobalConfigChanges;
  :local ChangeLogCode;
  :local Changes;

  :log debug ("Fetching changelog.");
  :do {
    :local Result [ / tool fetch check-certificate=yes-without-crl \
        ($ScriptUpdatesBaseUrl . "global-config.changes" . $ScriptUpdatesUrlSuffix) \
        output=user as-value ];
    :if ($Result->"status" = "finished") do={
      :set ChangeLogCode ($Result->"data");
    }
  } on-error={
    :log info ("Failed fetching changes!");
  }
  [ :parse $ChangeLogCode ];
  :for I from=($GlobalConfigVersion + 1) to=$ExpectedConfigVersion do={
    :set Changes ( $Changes . "\n * " . $GlobalConfigChanges->[ :tostr $I ] );
  }

  $SendNotification "Configuration warning!" \
      ("Current configuration on " . $Identity . " is out of date. " . \
      "Please update global-config, then increase variable " . \
      "GlobalConfigVersion (currently " . $GlobalConfigVersion . \
      ") to " . $ExpectedConfigVersion . " and re-run global-config.\n\n" . \
      "Changes:" . $Changes);
}