forked from lix-project/lix
Reword info on XDG base dirs (#8338)
This gives some more context and should clarify why it works that way. Also link it from the section on `NIX_USER_CONF_FILES`. Co-authored-by: John Ericson <git@JohnEricson.me>
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@ -71,9 +71,12 @@ Most Nix commands interpret the following environment variables:
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Settings are separated by the newline character.
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- <span id="env-NIX_USER_CONF_FILES">[`NIX_USER_CONF_FILES`](#env-NIX_USER_CONF_FILES)</span>\
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Overrides the location of the user Nix configuration files to load
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from (defaults to the XDG spec locations). The variable is treated
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as a list separated by the `:` token.
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Overrides the location of the Nix user configuration files to load from.
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The default are the locations according to the [XDG Base Directory Specification].
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See the [XDG Base Directories](#xdg-base-directories) sub-section for details.
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The variable is treated as a list separated by the `:` token.
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- <span id="env-TMPDIR">[`TMPDIR`](#env-TMPDIR)</span>\
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Use the specified directory to store temporary files. In particular,
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@ -103,15 +106,19 @@ Most Nix commands interpret the following environment variables:
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384 MiB. Setting it to a low value reduces memory consumption, but
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will increase runtime due to the overhead of garbage collection.
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## XDG Base Directory
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## XDG Base Directories
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New Nix commands conform to the [XDG Base Directory Specification], and use the following environment variables to determine locations of various state and configuration files:
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Nix follows the [XDG Base Directory Specification].
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For backwards compatibility, Nix commands will follow the standard only when [`use-xdg-base-directories`] is enabled.
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[New Nix commands](@docroot@/command-ref/new-cli/nix.md) (experimental) conform to the standard by default.
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The following environment variables are used to determine locations of various state and configuration files:
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- [`XDG_CONFIG_HOME`]{#env-XDG_CONFIG_HOME} (default `~/.config`)
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- [`XDG_STATE_HOME`]{#env-XDG_STATE_HOME} (default `~/.local/state`)
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- [`XDG_CACHE_HOME`]{#env-XDG_CACHE_HOME} (default `~/.cache`)
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Classic Nix commands can also be made to follow this standard using the [`use-xdg-base-directories`] configuration option.
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[XDG Base Directory Specification]: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
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[`use-xdg-base-directories`]: @docroot@/command-ref/conf-file.md#conf-use-xdg-base-directories
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[`use-xdg-base-directories`]: @docroot@/command-ref/conf-file.md#conf-use-xdg-base-directories
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