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nix3-store-prefetch-file(1)  General Commands Manual nix3-store-prefetch-file(1)

	    Warning
	    This program is experimental and its interface is subject to change.

Name
     nix store prefetch-file - download a file into the Nix store

Synopsis
     nix store prefetch-file [option...] url

Examples
     *	Download a file to the Nix store:

     # nix store prefetch-file https://releases.nixos.org/nix/nix-2.3.10/nix-2.3.10.tar.xz
     Downloaded 'https://releases.nixos.org/nix/nix-2.3.10/nix-2.3.10.tar.xz' to
     '/nix/store/vbdbi42hgnc4h7pyqzp6h2yf77kw93aw-source' (hash
     'sha256-qKheVd5D0BervxMDbt+1hnTKE2aRWC8XCAwc0SeHt6s=').

     *	Download a file and get the SHA-512 hash:

     # nix store prefetch-file --json --hash-type sha512 \
       https://releases.nixos.org/nix/nix-2.3.10/nix-2.3.10.tar.xz \
     | jq -r .hash
     sha512-6XJxfym0TNH9knxeH4ZOvns6wElFy3uahunl2hJgovACCMEMXSy42s69zWVyGJALXTI+86tpDJGlIcAySEKBbA==

Description
     This command downloads the file url to the Nix store. It prints out the re-
     sulting store path and the cryptographic hash of the contents of the file.

     The name component of the store path defaults to the last component of url,
     but this can be overridden using --name.

Options
     *	--executable

	Make  the resulting file executable. Note that this causes the resulting
	hash to be a NAR hash rather than a flat file hash.

     *	--expected-hash hash

	The expected hash of the file.

     *	--hash-type hash-algo

	Hash algorithm (blake3, md5, sha1, sha256, or sha512).

     *	--json

	Produce output in JSON format, suitable for consumption by another  pro-
	gram.

     *	--name name

	Override  the name component of the resulting store path. It defaults to
	the base name of url.

     *	--no-pretty

	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`.

     *	--pretty

	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.

     *	--unpack

	Unpack the archive (which must be a tarball or zip file) and add the re-
	sult to the Nix store.

   Logging-related options
     *	--debug

	Set the logging verbosity level to `debug'.

     *	--log-format format

	Set the format of log output; one of raw,  internal-json,  bar	or  bar-
	with-logs.

     *	--print-build-logs / -L

	Print full build logs on standard error.

     *	--quiet

	Decrease the logging verbosity level.

     *	--verbose / -v

	Increase the logging verbosity level.

   Miscellaneous global options
     *	--help

	Show usage information.

     *	--offline

	Disable substituters and consider all previously downloaded files up-to-
	date.

     *	--option name value

	Set the Nix configuration setting name to value (overriding nix.conf).

     *	--refresh

	Consider all previously downloaded files out-of-date.

     *	--version

	Show version information.

	Note

	See man nix.conf for overriding configuration settings with command line
	flags.

						     nix3-store-prefetch-file(1)

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