48 lines
2.0 KiB
Markdown
48 lines
2.0 KiB
Markdown
---
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synopsis: Add `nix hash convert`
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prs: 9452
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---
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New [`nix hash convert`](https://github.com/NixOS/nix/issues/8876) sub command with a fast track
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to stabilization! Examples:
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- Convert the hash to `nix32`.
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```bash
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$ nix hash convert --hash-algo "sha1" --to nix32 "800d59cfcd3c05e900cb4e214be48f6b886a08df"
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vw46m23bizj4n8afrc0fj19wrp7mj3c0
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```
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`nix32` is a base32 encoding with a nix-specific character set.
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Explicitly specify the hashing algorithm (optional with SRI hashes) but detect hash format by the length of the input
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hash.
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- Convert the hash to the `sri` format that includes an algorithm specification:
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```bash
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nix hash convert --hash-algo "sha1" "800d59cfcd3c05e900cb4e214be48f6b886a08df"
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sha1-gA1Zz808BekAy04hS+SPa4hqCN8=
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```
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or with an explicit `-to` format:
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```bash
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nix hash convert --hash-algo "sha1" --to sri "800d59cfcd3c05e900cb4e214be48f6b886a08df"
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sha1-gA1Zz808BekAy04hS+SPa4hqCN8=
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```
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- Assert the input format of the hash:
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```bash
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nix hash convert --hash-algo "sha256" --from nix32 "ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0="
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error: input hash 'ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=' does not have the expected format '--from nix32'
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nix hash convert --hash-algo "sha256" --from nix32 "1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s"
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sha256-ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0=
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```
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The `--to`/`--from`/`--hash-algo` parameters have context-sensitive auto-completion.
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## Related Deprecations
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The following commands are still available but will emit a deprecation warning. Please convert your code to
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`nix hash convert`:
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- `nix hash to-base16 $hash1 $hash2`: Use `nix hash convert --to base16 $hash1 $hash2` instead.
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- `nix hash to-base32 $hash1 $hash2`: Use `nix hash convert --to nix32 $hash1 $hash2` instead.
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- `nix hash to-base64 $hash1 $hash2`: Use `nix hash convert --to base64 $hash1 $hash2` instead.
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- `nix hash to-sri $hash1 $hash2`: : Use `nix hash convert --to sri $hash1 $hash2`
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or even just `nix hash convert $hash1 $hash2` instead.
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