nix3-store-prefetch-file

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 resulting 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 (‘md5’, ‘sha1’, ‘sha256’, or ‘sha512’)

•

--json

Produce output in JSON format, suitable for consumption by another program.

•

--name name

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