nix-prefetch-url prints out the base32 flat hash. There should be some flag to nix-hash to print base32, but it's equivalent to the hex hash.
On Apr 1, 2013, at 4:42, Bjørn Forsman <[email protected]> wrote: > On 1 April 2013 10:19, Marc Weber <[email protected]> wrote: >>> When I run sha256sum on the downloaded file I get the correct result: >> nix-hash --type sha256 [--flat] file >> >> I don't know why the output differs from the sha256sum tool. > > $ nix-hash --type sha256 > /nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz > 9095cdc75e33d80f2c3e076b2fce1a2aac5b5b090cacbbe035bce09be80108ee > > $ nix-hash --type sha256 --flat > /nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz > 0765e07dac432393dea3950639d5ba646ded95a9408ad002e54b3353ab6b9645 > > $ sha256sum /nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz > 0765e07dac432393dea3950639d5ba646ded95a9408ad002e54b3353ab6b9645 > /nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz > > So the --flat argument must be passed for it to behave like sha256sum. > > [Reading man nix-hash] > > "The hash is computed over a serialisation of each path: a dump of the > file system tree rooted at the path. This allows directories and > symlinks to be hashed as well as regular files. The dump is in the NAR > format produced by nix-store --dump. Thus, nix-hash path yields the > same cryptographic hash as nix-store --dump path | md5sum." > > So now I'm thinking that nix-prefetch-url does the same, i.e. hashes > the "serialisation" of the path. But no, it doesn't behave like > nix-hash, neither with or without --flat: > > $ nix-prefetch-url --type sha256 > http://download.lighttpd.net/lighttpd/releases-1.4.x/lighttpd-1.4.32.tar.gz > [...] > path is ‘/nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz’ > 0icndfmm6csbwl1d12j0m6aysvb4pbakj1lmlgg968s3miyy0r87 > > $ nix-hash --type sha256 > /nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz > 9095cdc75e33d80f2c3e076b2fce1a2aac5b5b090cacbbe035bce09be80108ee > > $ nix-hash --type sha256 --flat > /nix/store/6alqcyg5qayvwv90vqay1kqxq40mqmm0-lighttpd-1.4.32.tar.gz > 0765e07dac432393dea3950639d5ba646ded95a9408ad002e54b3353ab6b9645 > > Best regards, > Bjørn Forsman > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
