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nix-super/doc/manual/rl-next/nix-hash-convert.md
Robert Hensing 3811b334c6 rl-next: Use markdown frontmatter syntax 
The old syntax is still supported, as long as you don't use a {
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Add `nix hash convert` 9452

New nix hash convert sub command with a fast track to stabilization! Examples:

  • Convert the hash to nix32.

    $ nix hash convert --algo "sha1" --to nix32 "800d59cfcd3c05e900cb4e214be48f6b886a08df"
vw46m23bizj4n8afrc0fj19wrp7mj3c0

    nix32 is a base32 encoding with a nix-specific character set. Explicitly specify the hashing algorithm (optional with SRI hashes) but detect hash format by the length of the input hash.

  • Convert the hash to the sri format that includes an algorithm specification:

    nix hash convert --algo "sha1" "800d59cfcd3c05e900cb4e214be48f6b886a08df"
sha1-gA1Zz808BekAy04hS+SPa4hqCN8=

    or with an explicit -to format:

    nix hash convert --algo "sha1" --to sri "800d59cfcd3c05e900cb4e214be48f6b886a08df"
sha1-gA1Zz808BekAy04hS+SPa4hqCN8=

  • Assert the input format of the hash:

    nix hash convert --algo "sha256" --from nix32 "ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0="
error: input hash 'ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=' does not have the expected format '--from nix32'
nix hash convert --algo "sha256" --from nix32 "1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s"
sha256-ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=

The --to/--from/--algo parameters have context-sensitive auto-completion.

Related Deprecations

The following commands are still available but will emit a deprecation warning. Please convert your code to nix hash convert:

  • nix hash to-base16 $hash1 $hash2: Use nix hash convert --to base16 $hash1 $hash2 instead.
  • nix hash to-base32 $hash1 $hash2: Use nix hash convert --to nix32 $hash1 $hash2 instead.
  • nix hash to-base64 $hash1 $hash2: Use nix hash convert --to base64 $hash1 $hash2 instead.
  • nix hash to-sri $hash1 $hash2: : Use nix hash convert --to sri $hash1 $hash2 or even just nix hash convert $hash1 $hash2 instead.