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locate: fix update-locatedb service for mlocate

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This fixes the `update-locatedb` service when using the `mlocate`
package.

The service as-is does not properly handle flags during update of the
relevant database when configured to use the `mlocate` package.

The man entry for `updatedb` associated with `mlocate` does not say
that it supports environment variables in place of command line flags,
whereas the `findutils` package's updatedb does so.

To support this distinction, we pass the relevant settings as flags to
the `updatedb` program when using the `mlocate` package.

Fixes #29279
This commit is contained in:
Anthony Cowley 2018-03-19 15:24:45 -04:00
parent 56fb68dcef
commit 1f8382547f
1 changed files with 15 additions and 2 deletions
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17
nixos/modules/misc/locate.nix
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@ -97,7 +97,7 @@ in {
Whether not to index bind mounts
'';
};
};
config = mkIf cfg.enable {
@ -133,13 +133,26 @@ in {
systemd.services.update-locatedb =
{ description = "Update Locate Database";
path = mkIf (!isMLocate) [ pkgs.su ];
# mlocate's updatedb takes flags via a configuration file or
# on the command line, but not by environment variable.
script =
if isMLocate
then let toFlags = x: optional (cfg.${x} != [])
"--${lib.toLower x} '${concatStringsSep " " cfg.${x}}'";
args = concatLists (map toFlags ["pruneFS" "pruneNames" "prunePaths"]);
in ''
exec ${cfg.locate}/bin/updatedb \
--output ${toString cfg.output} ${concatStringsSep " " args} \
--prune-bind-mounts ${if cfg.pruneBindMounts then "yes" else "no"} \
${concatStringsSep " " cfg.extraFlags}
''
else ''
exec ${cfg.locate}/bin/updatedb \
${optionalString (cfg.localuser != null && ! isMLocate) ''--localuser=${cfg.localuser}''} \
--output=${toString cfg.output} ${concatStringsSep " " cfg.extraFlags}
'';
environment = {
environment = optionalAttrs (!isMLocate) {
PRUNEFS = concatStringsSep " " cfg.pruneFS;
PRUNEPATHS = concatStringsSep " " cfg.prunePaths;
PRUNENAMES = concatStringsSep " " cfg.pruneNames;