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https://github.com/privatevoid-net/nix-super.git
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0abb3ad537
This adds a command 'nix make-content-addressable' that rewrites the specified store paths into content-addressable paths. The advantage of such paths is that 1) they can be imported without signatures; 2) they can enable deduplication in cases where derivation changes do not cause output changes (apart from store path hashes). For example, $ nix make-content-addressable -r nixpkgs.cowsay rewrote '/nix/store/g1g31ah55xdia1jdqabv1imf6mcw0nb1-glibc-2.25-49' to '/nix/store/48jfj7bg78a8n4f2nhg269rgw1936vj4-glibc-2.25-49' ... rewrote '/nix/store/qbi6rzpk0bxjw8lw6azn2mc7ynnn455q-cowsay-3.03+dfsg1-16' to '/nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16' We can then copy the resulting closure to another store without signatures: $ nix copy --trusted-public-keys '' ---to ~/my-nix /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16 In order to support self-references in content-addressable paths, these paths are hashed "modulo" self-references, meaning that self-references are zeroed out during hashing. Somewhat annoyingly, this means that the NAR hash stored in the Nix database is no longer necessarily equal to the output of "nix hash-path"; for content-addressable paths, you need to pass the --modulo flag: $ nix path-info --json /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16 | jq -r .[].narHash sha256:0ri611gdilz2c9rsibqhsipbfs9vwcqvs811a52i2bnkhv7w9mgw $ nix hash-path --type sha256 --base32 /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16 1ggznh07khq0hz6id09pqws3a8q9pn03ya3c03nwck1kwq8rclzs $ nix hash-path --type sha256 --base32 /nix/store/iq6g2x4q62xp7y7493bibx0qn5w7xz67-cowsay-3.03+dfsg1-16 --modulo iq6g2x4q62xp7y7493bibx0qn5w7xz67 0ri611gdilz2c9rsibqhsipbfs9vwcqvs811a52i2bnkhv7w9mgw |
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|---|---|---|
| .. | ||
| builtins | ||
| binary-cache-store.cc | ||
| binary-cache-store.hh | ||
| build.cc | ||
| builtins.hh | ||
| crypto.cc | ||
| crypto.hh | ||
| derivations.cc | ||
| derivations.hh | ||
| download.cc | ||
| download.hh | ||
| export-import.cc | ||
| fs-accessor.hh | ||
| gc.cc | ||
| globals.cc | ||
| globals.hh | ||
| http-binary-cache-store.cc | ||
| legacy-ssh-store.cc | ||
| local-binary-cache-store.cc | ||
| local-fs-store.cc | ||
| local-store.cc | ||
| local-store.hh | ||
| local.mk | ||
| machines.cc | ||
| machines.hh | ||
| misc.cc | ||
| nar-accessor.cc | ||
| nar-accessor.hh | ||
| nar-info-disk-cache.cc | ||
| nar-info-disk-cache.hh | ||
| nar-info.cc | ||
| nar-info.hh | ||
| nix-store.pc.in | ||
| optimise-store.cc | ||
| parsed-derivations.cc | ||
| parsed-derivations.hh | ||
| pathlocks.cc | ||
| pathlocks.hh | ||
| profiles.cc | ||
| profiles.hh | ||
| references.cc | ||
| references.hh | ||
| remote-fs-accessor.cc | ||
| remote-fs-accessor.hh | ||
| remote-store.cc | ||
| remote-store.hh | ||
| s3-binary-cache-store.cc | ||
| s3-binary-cache-store.hh | ||
| s3.hh | ||
| sandbox-defaults.sb | ||
| sandbox-minimal.sb | ||
| sandbox-network.sb | ||
| schema.sql | ||
| serve-protocol.hh | ||
| sqlite.cc | ||
| sqlite.hh | ||
| ssh-store.cc | ||
| ssh.cc | ||
| ssh.hh | ||
| store-api.cc | ||
| store-api.hh | ||
| worker-protocol.hh | ||