nix recursive hash computation
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Authored by anlambert on Oct 4 2022, 2:09 PM.

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	{
	"outputHash": "0s7p9swjqjsqddylmgid6cv263ggq7pmb734z4k84yfcrgb6kg4g",
	"outputHashAlgo": "sha256",
	"outputHashMode": "recursive",
	"type": "url",
	"urls": [
	"https://github.com/kandu/trie/archive/1.0.0.tar.gz"
	],
	"integrity": "sha256-j7xp1svMeYIm+WScVe/B7w0jNjMtvkp9a1hLLLlO92g=",
	"inferredFetcher": "fetchzip"
	},

	anlambert@carnavalet:/tmp$ sudo apt install nix-bin

	anlambert@carnavalet:/tmp$ curl -LO https://github.com/kandu/trie/archive/1.0.0.tar.gz
	% Total % Received % Xferd Average Speed Time Time Time Current
	Dload Upload Total Spent Left Speed
	0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
	100 2399 0 2399 0 0 8388 0 --:--:-- --:--:-- --:--:-- 8388

	anlambert@carnavalet:/tmp$ tar -xvzf 1.0.0.tar.gz
	trie-1.0.0/
	trie-1.0.0/.gitignore
	trie-1.0.0/LICENSE
	trie-1.0.0/Makefile
	trie-1.0.0/VERSION
	trie-1.0.0/dune-project
	trie-1.0.0/src/
	trie-1.0.0/src/dune
	trie-1.0.0/src/trie.ml
	trie-1.0.0/src/trie.mli
	trie-1.0.0/trie.opam

	anlambert@carnavalet:/tmp$ nix-store --dump trie-1.0.0/ \| sha256sum
	8fbc69d6cbcc798226f9649c55efc1ef0d2336332dbe4a7d6b584b2cb94ef768 -

	anlambert@carnavalet:/tmp$ python
	Python 3.9.2 (default, Feb 28 2021, 17:03:44)
	[GCC 10.2.1 20210110] on linux
	Type "help", "copyright", "credits" or "license" for more information.
	>>> import base64
	>>> base64.decodebytes("j7xp1svMeYIm+WScVe/B7w0jNjMtvkp9a1hLLLlO92g=".encode()).hex()
	'8fbc69d6cbcc798226f9649c55efc1ef0d2336332dbe4a7d6b584b2cb94ef768'

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anlambert created this paste.Oct 4 2022, 2:09 PM

Related to T3781
Related to T4538

ardumont mentioned this in T3781: Replace the Nixguix loader with a lister.Oct 4 2022, 2:19 PM

ardumont mentioned this in P1469 content loader checksum mismatched.Oct 4 2022, 6:16 PM

zimoun mentioned this in T4538: Consider archiving NAR hashes.Oct 11 2022, 7:59 PM

$ curl -LO https://github.com/kandu/trie/archive/1.0.0.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  2399    0  2399    0     0   5391      0 --:--:-- --:--:-- --:--:--  5391

$ tar -xvzf 1.0.0.tar.gz
trie-1.0.0/
trie-1.0.0/.gitignore
trie-1.0.0/LICENSE
trie-1.0.0/Makefile
trie-1.0.0/VERSION
trie-1.0.0/dune-project
trie-1.0.0/src/
trie-1.0.0/src/dune
trie-1.0.0/src/trie.ml
trie-1.0.0/src/trie.mli
trie-1.0.0/trie.opam

$ guix hash -S nar -H sha256 -f hex trie-1.0.0/
8fbc69d6cbcc798226f9649c55efc1ef0d2336332dbe4a7d6b584b2cb94ef768

$ guix hash -S nar -H sha256 -f base64 trie-1.0.0/
j7xp1svMeYIm+WScVe/B7w0jNjMtvkp9a1hLLLlO92g=

$ guix hash -S nar -H sha256 -f base64 trie-1.0.0 | base64 -d | hexdump -v -e '/1 "%02x" '
8fbc69d6cbcc798226f9649c55efc1ef0d2336332dbe4a7d6b584b2cb94ef768

$ python3.9 narserializer.py trie-1.0.0/ | sha256sum
8fbc69d6cbcc798226f9649c55efc1ef0d2336332dbe4a7d6b584b2cb94ef768  -

$ python3.9 narserializer.py trie-1.0.0/ sha256
8fbc69d6cbcc798226f9649c55efc1ef0d2336332dbe4a7d6b584b2cb94ef768

$ python3.9 narserializer.py trie-1.0.0/ sha256 base64
j7xp1svMeYIm+WScVe/B7w0jNjMtvkp9a1hLLLlO92g=

where the tiny almost trivial Python code of narserialiser.py reads in T4538.

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nix recursive hash computation
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