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Code Activity

home-manager: add support for custom backup command (#6424) (#7153)

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This adds a new backupCommand option to allow users to specify a
custom command to run on existing files during activation, as an
alternative to the existing backupFileExtension mechanism.

Adds backupCommand option to NixOS and nix-darwin modules.

Exports HOME_MANAGER_BACKUP_COMMAND environment variable when set.

Updates file activation logic to use the custom backup command if
provided, falling back to the existing backup extension logic.

Updates collision checking and user-facing instructions to
mention the new option.

This enables advanced backup workflows, such as moving files to
trash or archiving with custom tools, before managing them with
Home Manager.
This commit is contained in:
Christina O'Donnell 2025-10-30 17:26:13 +00:00 • committed by GitHub
parent c6d4cb31d7
commit ce76393bb7
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6 changed files with 40 additions and 11 deletions
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nix-darwin/default.nix
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@ -28,6 +28,9 @@ in
${lib.optionalString (
cfg.backupFileExtension != null
) "export HOME_MANAGER_BACKUP_EXT=${lib.escapeShellArg cfg.backupFileExtension}"}
${lib.optionalString (
cfg.backupCommand != null
) "export HOME_MANAGER_BACKUP_COMMAND=${lib.escapeShellArg cfg.backupCommand}"}
${lib.optionalString cfg.overwriteBackup "export HOME_MANAGER_BACKUP_OVERWRITE=1"}
${lib.optionalString cfg.verbose "export VERBOSE=1"}
exec ${usercfg.home.activationPackage}/activate --driver-version ${driverVersion} >&2