nix3-flake-prefetch - (unknown subject)
Name Synopsis Examples Description Options Common evaluation options Common flake-related options Logging-related options Miscellaneous global optionsWarning
This program is
experimental
and its interface is subject to change.
Name
nix flake prefetch - download the source tree denoted by a flake reference into the Nix store
Synopsis
nix flake prefetch [option…] flake-url
Examples
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Download a tarball and unpack it: |
# nix flake
prefetch
https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.5.tar.xz
--out-link ./result
Downloaded
’https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.5.tar.xz?narHash=sha256-3XYHZANT6AFBV0BqegkAZHbba6oeDkIUCDwbATLMhAY=’
to
’/nix/store/sl5vvk8mb4ma1sjyy03kwpvkz50hd22d-source’
(hash
’sha256-3XYHZANT6AFBV0BqegkAZHbba6oeDkIUCDwbATLMhAY=’).
# cat
./result/README
Linux kernel
â¦
|
• |
Download the dwarffs flake (looked up in the flake registry): |
# nix flake
prefetch dwarffs --json
{"hash":"sha256-VHg3MYVgQ12LeRSU2PSoDeKlSPD8PYYEFxxwkVVDRd0="
,"storePath":"/nix/store/hang3792qwdmm2n0d9nsrs5n6bsws6kv-source"}
Description
This command downloads the source tree denoted by flake reference flake-url. Note that this does not need to be a flake (i.e. it does not have to contain a flake.nix file).
Options
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Produce output in JSON format, suitable for consumption by another program.
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Print compact JSON output on a single line, even when the output is a terminal. Some commands may print multiple JSON objects on separate lines.
See `--pretty`.
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--out-link / -o path |
Create symlink named path to the resulting store path.
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Print multi-line, indented JSON output for readability.
Default: indent if output is to a terminal.
This option is only effective when `--json` is also specified.
Common evaluation options
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--arg name expr |
Pass the value expr as the argument name to Nix functions.
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--arg-from-file name path |
Pass the contents of file path as the argument name to Nix functions.
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--arg-from-stdin name |
Pass the contents of stdin as the argument name to Nix functions.
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--argstr name string |
Pass the string string as the argument name to Nix functions.
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Start an interactive environment if evaluation fails.
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--eval-store store-url |
The URL of the Nix store to use for evaluation, i.e. to store derivations (.drv files) and inputs referenced by them.
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Allow access to mutable paths and repositories.
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--include / -I path |
Add path to search path entries used to resolve lookup paths
This option may be given multiple times.
Paths added through -I take precedence over the nix-path configuration setting and the NIX_PATH environment variable.
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--override-flake original-ref resolved-ref |
Override the flake registries, redirecting original-ref to resolved-ref.
Common flake-related options
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Commit changes to the flake’s lock file.
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--inputs-from flake-url |
Use the inputs of the specified flake as registry entries.
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Don’t allow lookups in the flake registries.
DEPRECATED
Use --no-use-registries instead.
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Do not allow any updates to the flake’s lock file.
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Do not write the flake’s newly generated lock file.
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--output-lock-file flake-lock-path |
Write the given lock file instead of flake.lock within the top-level flake.
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--override-input input-path flake-url |
Override a specific flake input (e.g. dwarffs/nixpkgs). This implies --no-write-lock-file.
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Recreate the flake’s lock file from scratch.
DEPRECATED
Use nix flake update instead.
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--reference-lock-file flake-lock-path |
Read the given lock file instead of flake.lock within the top-level flake.
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--update-input input-path |
Update a specific flake input (ignoring its previous entry in the lock file).
DEPRECATED
Use nix flake update instead.
Logging-related options
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Set the logging verbosity level to ‘debug’.
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--log-format format |
Set the format of log output; one of raw, internal-json, bar or bar-with-logs.
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--print-build-logs / -L |
Print full build logs on standard error.
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Decrease the logging verbosity level.
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--verbose / -v |
Increase the logging verbosity level.
Miscellaneous global options
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Show usage information.
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Disable substituters and consider all previously downloaded files up-to-date.
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--option name value |
Set the Nix configuration setting name to value (overriding nix.conf).
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Consider all previously downloaded files out-of-date.
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During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths.
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Show version information.
Note
See man nix.conf for overriding configuration settings with command line flags.