forked from lix-project/lix
Merge pull request #9126 from fricklerhandwerk/dedent
remove unnecessary indentation from markdown list
This commit is contained in:
John Ericson
GitHub
commit
3015375197
|
|
@ -2,109 +2,124 @@
|
|||
|
||||
Most Nix commands interpret the following environment variables:
|
||||
|
||||
- <span id="env-IN_NIX_SHELL">[`IN_NIX_SHELL`](#env-IN_NIX_SHELL)</span>\
|
||||
Indicator that tells if the current environment was set up by
|
||||
`nix-shell`. It can have the values `pure` or `impure`.
|
||||
- <span id="env-IN_NIX_SHELL">[`IN_NIX_SHELL`](#env-IN_NIX_SHELL)</span>
|
||||
|
||||
- <span id="env-NIX_PATH">[`NIX_PATH`](#env-NIX_PATH)</span>\
|
||||
A colon-separated list of directories used to look up the location of Nix
|
||||
expressions using [paths](@docroot@/language/values.md#type-path)
|
||||
enclosed in angle brackets (i.e., `<path>`),
|
||||
e.g. `/home/eelco/Dev:/etc/nixos`. It can be extended using the
|
||||
[`-I` option](@docroot@/command-ref/opt-common.md#opt-I).
|
||||
Indicator that tells if the current environment was set up by
|
||||
`nix-shell`. It can have the values `pure` or `impure`.
|
||||
|
||||
If `NIX_PATH` is not set at all, Nix will fall back to the following list in [impure](@docroot@/command-ref/conf-file.md#conf-pure-eval) and [unrestricted](@docroot@/command-ref/conf-file.md#conf-restrict-eval) evaluation mode:
|
||||
- <span id="env-NIX_PATH">[`NIX_PATH`](#env-NIX_PATH)</span>
|
||||
|
||||
1. `$HOME/.nix-defexpr/channels`
|
||||
2. `nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs`
|
||||
3. `/nix/var/nix/profiles/per-user/root/channels`
|
||||
A colon-separated list of directories used to look up the location of Nix
|
||||
expressions using [paths](@docroot@/language/values.md#type-path)
|
||||
enclosed in angle brackets (i.e., `<path>`),
|
||||
e.g. `/home/eelco/Dev:/etc/nixos`. It can be extended using the
|
||||
[`-I` option](@docroot@/command-ref/opt-common.md#opt-I).
|
||||
|
||||
If `NIX_PATH` is set to an empty string, resolving search paths will always fail.
|
||||
For example, attempting to use `<nixpkgs>` will produce:
|
||||
If `NIX_PATH` is not set at all, Nix will fall back to the following list in [impure](@docroot@/command-ref/conf-file.md#conf-pure-eval) and [unrestricted](@docroot@/command-ref/conf-file.md#conf-restrict-eval) evaluation mode:
|
||||
|
||||
error: file 'nixpkgs' was not found in the Nix search path
|
||||
1. `$HOME/.nix-defexpr/channels`
|
||||
2. `nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs`
|
||||
3. `/nix/var/nix/profiles/per-user/root/channels`
|
||||
|
||||
- <span id="env-NIX_IGNORE_SYMLINK_STORE">[`NIX_IGNORE_SYMLINK_STORE`](#env-NIX_IGNORE_SYMLINK_STORE)</span>\
|
||||
Normally, the Nix store directory (typically `/nix/store`) is not
|
||||
allowed to contain any symlink components. This is to prevent
|
||||
“impure” builds. Builders sometimes “canonicalise” paths by
|
||||
resolving all symlink components. Thus, builds on different machines
|
||||
(with `/nix/store` resolving to different locations) could yield
|
||||
different results. This is generally not a problem, except when
|
||||
builds are deployed to machines where `/nix/store` resolves
|
||||
differently. If you are sure that you’re not going to do that, you
|
||||
can set `NIX_IGNORE_SYMLINK_STORE` to `1`.
|
||||
If `NIX_PATH` is set to an empty string, resolving search paths will always fail.
|
||||
For example, attempting to use `<nixpkgs>` will produce:
|
||||
|
||||
Note that if you’re symlinking the Nix store so that you can put it
|
||||
on another file system than the root file system, on Linux you’re
|
||||
better off using `bind` mount points, e.g.,
|
||||
error: file 'nixpkgs' was not found in the Nix search path
|
||||
|
||||
```console
|
||||
$ mkdir /nix
|
||||
$ mount -o bind /mnt/otherdisk/nix /nix
|
||||
```
|
||||
- <span id="env-NIX_IGNORE_SYMLINK_STORE">[`NIX_IGNORE_SYMLINK_STORE`](#env-NIX_IGNORE_SYMLINK_STORE)</span>
|
||||
|
||||
Consult the mount 8 manual page for details.
|
||||
Normally, the Nix store directory (typically `/nix/store`) is not
|
||||
allowed to contain any symlink components. This is to prevent
|
||||
“impure” builds. Builders sometimes “canonicalise” paths by
|
||||
resolving all symlink components. Thus, builds on different machines
|
||||
(with `/nix/store` resolving to different locations) could yield
|
||||
different results. This is generally not a problem, except when
|
||||
builds are deployed to machines where `/nix/store` resolves
|
||||
differently. If you are sure that you’re not going to do that, you
|
||||
can set `NIX_IGNORE_SYMLINK_STORE` to `1`.
|
||||
|
||||
- <span id="env-NIX_STORE_DIR">[`NIX_STORE_DIR`](#env-NIX_STORE_DIR)</span>\
|
||||
Overrides the location of the Nix store (default `prefix/store`).
|
||||
Note that if you’re symlinking the Nix store so that you can put it
|
||||
on another file system than the root file system, on Linux you’re
|
||||
better off using `bind` mount points, e.g.,
|
||||
|
||||
- <span id="env-NIX_DATA_DIR">[`NIX_DATA_DIR`](#env-NIX_DATA_DIR)</span>\
|
||||
Overrides the location of the Nix static data directory (default
|
||||
`prefix/share`).
|
||||
```console
|
||||
$ mkdir /nix
|
||||
$ mount -o bind /mnt/otherdisk/nix /nix
|
||||
```
|
||||
|
||||
- <span id="env-NIX_LOG_DIR">[`NIX_LOG_DIR`](#env-NIX_LOG_DIR)</span>\
|
||||
Overrides the location of the Nix log directory (default
|
||||
`prefix/var/log/nix`).
|
||||
Consult the mount 8 manual page for details.
|
||||
|
||||
- <span id="env-NIX_STATE_DIR">[`NIX_STATE_DIR`](#env-NIX_STATE_DIR)</span>\
|
||||
Overrides the location of the Nix state directory (default
|
||||
`prefix/var/nix`).
|
||||
- <span id="env-NIX_STORE_DIR">[`NIX_STORE_DIR`](#env-NIX_STORE_DIR)</span>
|
||||
|
||||
- <span id="env-NIX_CONF_DIR">[`NIX_CONF_DIR`](#env-NIX_CONF_DIR)</span>\
|
||||
Overrides the location of the system Nix configuration directory
|
||||
(default `prefix/etc/nix`).
|
||||
Overrides the location of the Nix store (default `prefix/store`).
|
||||
|
||||
- <span id="env-NIX_CONFIG">[`NIX_CONFIG`](#env-NIX_CONFIG)</span>\
|
||||
Applies settings from Nix configuration from the environment.
|
||||
The content is treated as if it was read from a Nix configuration file.
|
||||
Settings are separated by the newline character.
|
||||
- <span id="env-NIX_DATA_DIR">[`NIX_DATA_DIR`](#env-NIX_DATA_DIR)</span>
|
||||
|
||||
- <span id="env-NIX_USER_CONF_FILES">[`NIX_USER_CONF_FILES`](#env-NIX_USER_CONF_FILES)</span>\
|
||||
Overrides the location of the Nix user configuration files to load from.
|
||||
Overrides the location of the Nix static data directory (default
|
||||
`prefix/share`).
|
||||
|
||||
The default are the locations according to the [XDG Base Directory Specification].
|
||||
See the [XDG Base Directories](#xdg-base-directories) sub-section for details.
|
||||
- <span id="env-NIX_LOG_DIR">[`NIX_LOG_DIR`](#env-NIX_LOG_DIR)</span>
|
||||
|
||||
The variable is treated as a list separated by the `:` token.
|
||||
Overrides the location of the Nix log directory (default
|
||||
`prefix/var/log/nix`).
|
||||
|
||||
- <span id="env-TMPDIR">[`TMPDIR`](#env-TMPDIR)</span>\
|
||||
Use the specified directory to store temporary files. In particular,
|
||||
this includes temporary build directories; these can take up
|
||||
substantial amounts of disk space. The default is `/tmp`.
|
||||
- <span id="env-NIX_STATE_DIR">[`NIX_STATE_DIR`](#env-NIX_STATE_DIR)</span>
|
||||
|
||||
- <span id="env-NIX_REMOTE">[`NIX_REMOTE`](#env-NIX_REMOTE)</span>\
|
||||
This variable should be set to `daemon` if you want to use the Nix
|
||||
daemon to execute Nix operations. This is necessary in [multi-user
|
||||
Nix installations](@docroot@/installation/multi-user.md). If the Nix
|
||||
daemon's Unix socket is at some non-standard path, this variable
|
||||
should be set to `unix://path/to/socket`. Otherwise, it should be
|
||||
left unset.
|
||||
Overrides the location of the Nix state directory (default
|
||||
`prefix/var/nix`).
|
||||
|
||||
- <span id="env-NIX_SHOW_STATS">[`NIX_SHOW_STATS`](#env-NIX_SHOW_STATS)</span>\
|
||||
If set to `1`, Nix will print some evaluation statistics, such as
|
||||
the number of values allocated.
|
||||
- <span id="env-NIX_CONF_DIR">[`NIX_CONF_DIR`](#env-NIX_CONF_DIR)</span>
|
||||
|
||||
- <span id="env-NIX_COUNT_CALLS">[`NIX_COUNT_CALLS`](#env-NIX_COUNT_CALLS)</span>\
|
||||
If set to `1`, Nix will print how often functions were called during
|
||||
Nix expression evaluation. This is useful for profiling your Nix
|
||||
expressions.
|
||||
Overrides the location of the system Nix configuration directory
|
||||
(default `prefix/etc/nix`).
|
||||
|
||||
- <span id="env-GC_INITIAL_HEAP_SIZE">[`GC_INITIAL_HEAP_SIZE`](#env-GC_INITIAL_HEAP_SIZE)</span>\
|
||||
If Nix has been configured to use the Boehm garbage collector, this
|
||||
variable sets the initial size of the heap in bytes. It defaults to
|
||||
384 MiB. Setting it to a low value reduces memory consumption, but
|
||||
will increase runtime due to the overhead of garbage collection.
|
||||
- <span id="env-NIX_CONFIG">[`NIX_CONFIG`](#env-NIX_CONFIG)</span>
|
||||
|
||||
Applies settings from Nix configuration from the environment.
|
||||
The content is treated as if it was read from a Nix configuration file.
|
||||
Settings are separated by the newline character.
|
||||
|
||||
- <span id="env-NIX_USER_CONF_FILES">[`NIX_USER_CONF_FILES`](#env-NIX_USER_CONF_FILES)</span>
|
||||
|
||||
Overrides the location of the Nix user configuration files to load from.
|
||||
|
||||
The default are the locations according to the [XDG Base Directory Specification].
|
||||
See the [XDG Base Directories](#xdg-base-directories) sub-section for details.
|
||||
|
||||
The variable is treated as a list separated by the `:` token.
|
||||
|
||||
- <span id="env-TMPDIR">[`TMPDIR`](#env-TMPDIR)</span>
|
||||
|
||||
Use the specified directory to store temporary files. In particular,
|
||||
this includes temporary build directories; these can take up
|
||||
substantial amounts of disk space. The default is `/tmp`.
|
||||
|
||||
- <span id="env-NIX_REMOTE">[`NIX_REMOTE`](#env-NIX_REMOTE)</span>
|
||||
|
||||
This variable should be set to `daemon` if you want to use the Nix
|
||||
daemon to execute Nix operations. This is necessary in [multi-user
|
||||
Nix installations](@docroot@/installation/multi-user.md). If the Nix
|
||||
daemon's Unix socket is at some non-standard path, this variable
|
||||
should be set to `unix://path/to/socket`. Otherwise, it should be
|
||||
left unset.
|
||||
|
||||
- <span id="env-NIX_SHOW_STATS">[`NIX_SHOW_STATS`](#env-NIX_SHOW_STATS)</span>
|
||||
|
||||
If set to `1`, Nix will print some evaluation statistics, such as
|
||||
the number of values allocated.
|
||||
|
||||
- <span id="env-NIX_COUNT_CALLS">[`NIX_COUNT_CALLS`](#env-NIX_COUNT_CALLS)</span>
|
||||
|
||||
If set to `1`, Nix will print how often functions were called during
|
||||
Nix expression evaluation. This is useful for profiling your Nix
|
||||
expressions.
|
||||
|
||||
- <span id="env-GC_INITIAL_HEAP_SIZE">[`GC_INITIAL_HEAP_SIZE`](#env-GC_INITIAL_HEAP_SIZE)</span>
|
||||
|
||||
If Nix has been configured to use the Boehm garbage collector, this
|
||||
variable sets the initial size of the heap in bytes. It defaults to
|
||||
384 MiB. Setting it to a low value reduces memory consumption, but
|
||||
will increase runtime due to the overhead of garbage collection.
|
||||
|
||||
## XDG Base Directories
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue