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author | Eelco Dolstra <edolstra@gmail.com> | 2016-10-21T14·50+0200 |
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committer | Eelco Dolstra <edolstra@gmail.com> | 2016-10-21T14·50+0200 |
commit | 542ae5c8f804b704101f9d27bd8b2aa62ded899c (patch) | |
tree | f80ffbbfcdc2e25dbbc660e103144fa61958b235 /src/libstore/nar-accessor.hh | |
parent | 307cc8c33d1dc4abaaf15d8f4ec64c02d5bb81aa (diff) |
BinaryCacheStore: Optionally write a NAR listing
The store parameter "write-nar-listing=1" will cause BinaryCacheStore to write a file ‘<store-hash>.ls.xz’ for each ‘<store-hash>.narinfo’ added to the binary cache. This file contains an XZ-compressed JSON file describing the contents of the NAR, excluding the contents of regular files. E.g. { "version": 1, "root": { "type": "directory", "entries": { "lib": { "type": "directory", "entries": { "Mcrt1.o": { "type": "regular", "size": 1288 }, "Scrt1.o": { "type": "regular", "size": 3920 }, } } } ... } } (The actual file has no indentation.) This is intended to speed up the NixOS channels programs index generator [1], since fetching gazillions of large NARs from cache.nixos.org is currently a bottleneck for updating the regular (non-small) channel. [1] https://github.com/NixOS/nixos-channel-scripts/blob/master/generate-programs-index.cc
Diffstat (limited to 'src/libstore/nar-accessor.hh')
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