Recently I noticed that my CPU was pretty busy with the desktop search indexing, it brought me to the question:

How can I disable the desktop search service trackerd?

After a brief investigation I found some XDG desktop needed to be edited to include the key Hidden=true.

This policy disables known trackerd related XDG files when they are found.

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  body file control
  {
          inputs => { "$(sys.libdir)/stdlib.cf" };
  }

  bundle agent disable_desktop_search
  # Disables trackerd used by ubuntu desktop search
  # https://askubuntu.com/questions/346211/tracker-store-and-tracker-miner-fs-eating-up-my-cpu-on-every-startup
  # https://gist.github.com/Prezto/75d612cebc9300f83bc74830df3a6410
  {
    meta:
        "tags" slist => { "autorun" };

    vars:
        "desktop_files"
          slist => {
                     "trackerd.desktop",
                     "tracker-extract.desktop",
                     "tracker-miner-apps.desktop",
                     "tracker-miner-fs.desktop",
                     "tracker-miner-user-guide.desktop",
                     "tracker-store.desktop",
          };

        "conf[Hidden]" string => "true";

    files:

        # If any known trackerd desktop file exists, make sure that that it
        # contains the option to disable the service.

        "/etc/xdg/autostart/$(desktop_files)"
          if => fileexists( "/etc/xdg/autostart/$(desktop_files)" ),
          edit_line => set_line_based( "$(this.bundle).conf",
                                       "=",
                                       "\s*=\s*",
                                       ".*",
                                       "\s*#\s*");
  }

  @if minimum_version(3.12)
  # If this policy file is used as the entry, run the policy
  bundle agent __main__
  {
    methods:
        "disable_desktop_search";
  }
  @endif

How does the policy work?

We include the standard library using body file control. This allows the policy file to be used directly instead of integrated with a larger policy yet still leverage bundles and bodies from the standard library (e.g. set_line_based ).

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  body file control
  {
          inputs => { "$(sys.libdir)/stdlib.cf" };
  }

The disable_desktop_search bundle is tagged with autorun so that the policy can be easily used with the MPF autorun functionality.

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  bundle agent disable_desktop_search
  # Disables trackerd used by ubuntu desktop search
  # https://askubuntu.com/questions/346211/tracker-store-and-tracker-miner-fs-eating-up-my-cpu-on-every-startup
  # https://gist.github.com/Prezto/75d612cebc9300f83bc74830df3a6410
  {
    meta:
        "tags" slist => { "autorun" };

The list of known trackerd related XDG files is enumerated.

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    vars:
        "desktop_files"
          slist => {
                     "trackerd.desktop",
                     "tracker-extract.desktop",
                     "tracker-miner-apps.desktop",
                     "tracker-miner-fs.desktop",
                     "tracker-miner-user-guide.desktop",
                     "tracker-store.desktop",
          };

The desired configuration is specified in the classic array conf.

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        "conf[Hidden]" string => "true";

Each known trackerd related XDG file is inspected for the proper configuration line entries and the files are repaired if necessary.

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    files:

        # If any known trackerd desktop file exists, make sure that that it
        # contains the option to disable the service.

        "/etc/xdg/autostart/$(desktop_files)"
          if => fileexists( "/etc/xdg/autostart/$(desktop_files)" ),
          edit_line => set_line_based( "$(this.bundle).conf",
                                       "=",
                                       "\s*=\s*",
                                       ".*",
                                       "\s*#\s*");
  }

Finally, if we are running version 3.12.0 or greater we add support for direct execution of the policy without conflicting bundle names using the new executable library support from the special bundle __main__.

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  @if minimum_version(3.12)
  # If this policy file is used as the entry, run the policy
  bundle agent __main__
  {
    methods:
        "disable_desktop_search";
  }
  @endif