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clarify read order for configuration settings

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Valentin Gagarin 2023-06-20 12:12:03 +02:00
parent 38bd1cc9bc
commit bc7324e912
1 changed files with 9 additions and 9 deletions
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18
doc/manual/src/command-ref/conf-file-prefix.md
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@ -8,19 +8,19 @@ Nix supports a variety of configuration settings, which are read from configurat
## Configuration file
By default Nix reads settings from the following places:
By default Nix reads settings from the following places, in that order:
- The system-wide configuration file `sysconfdir/nix/nix.conf` (i.e. `/etc/nix/nix.conf` on most systems), or `$NIX_CONF_DIR/nix.conf` if [`NIX_CONF_DIR`](./env-common.md#env-NIX_CONF_DIR) is set.
1. The system-wide configuration file `sysconfdir/nix/nix.conf` (i.e. `/etc/nix/nix.conf` on most systems), or `$NIX_CONF_DIR/nix.conf` if [`NIX_CONF_DIR`](./env-common.md#env-NIX_CONF_DIR) is set.
Values loaded in this file are not forwarded to the Nix daemon.
The client assumes that the daemon has already loaded them.
Values loaded in this file are not forwarded to the Nix daemon.
The client assumes that the daemon has already loaded them.
- If [`NIX_USER_CONF_FILES`](./env-common.md#env-NIX_USER_CONF_FILES) is set, then each path separated by `:` will be loaded in reverse order.
1. If [`NIX_USER_CONF_FILES`](./env-common.md#env-NIX_USER_CONF_FILES) is set, then each path separated by `:` will be loaded in reverse order.
Otherwise it will look for `nix/nix.conf` files in `XDG_CONFIG_DIRS` and [`XDG_CONFIG_HOME`](./env-common.md#env-XDG_CONFIG_HOME).
If unset, `XDG_CONFIG_DIRS` defaults to `/etc/xdg`, and `XDG_CONFIG_HOME` defaults to `$HOME/.config` as per [XDG Base Directory Specification](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html).
Otherwise it will look for `nix/nix.conf` files in `XDG_CONFIG_DIRS` and [`XDG_CONFIG_HOME`](./env-common.md#env-XDG_CONFIG_HOME).
If unset, `XDG_CONFIG_DIRS` defaults to `/etc/xdg`, and `XDG_CONFIG_HOME` defaults to `$HOME/.config` as per [XDG Base Directory Specification](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html).
- If [`NIX_CONFIG`](./env-common.md#env-NIX_CONFIG) is set, its contents are treated as the contents of a configuration file.
1. If [`NIX_CONFIG`](./env-common.md#env-NIX_CONFIG) is set, its contents are treated as the contents of a configuration file.
### File format
@ -38,7 +38,7 @@ Other files can be included with a line like `include <path>`, where `<path>` is
A missing file is an error unless `!include` is used instead.
A configuration setting usually overrides any previous value.
However, you can prefix the name of the setting by `extra-` to *append* to the previous value.
However, for settings that take a list of items, you can prefix the name of the setting by `extra-` to *append* to the previous value.
For instance,