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2012-08-01 nix-channel: Use binary caches advertised by channelsEelco Dolstra2-17/+30
Channels can now advertise a binary cache by creating a file <channel-url>/binary-cache-url. The channel unpacker puts these in its "binary-caches" subdirectory. Thus, the URLS of the binary caches for the channels added by root appear in /nix/var/nix/profiles/per-user/eelco/channels/binary-caches/*. The binary cache substituter reads these and adds them to the list of binary caches.
2012-08-01 download-from-binary-cache: Remove duplicate URLsEelco Dolstra1-2/+2
2012-08-01 Report substituter errors to clients of the Nix daemonEelco Dolstra1-7/+3
2012-07-31 Allow daemon users to override ‘binary-caches’Eelco Dolstra1-3/+27
For security reasons, daemon users can only specify caches that appear in the ‘binary-caches’ and ‘trusted-binary-caches’ options in nix.conf.
2012-07-30 Do some validation of URLsEelco Dolstra3-5/+8
2012-07-30 Get rid of $NIX_BINARY_CACHESEelco Dolstra1-3/+2
You can use ‘--option binary-caches URLs’ instead.
2012-07-30 nix-install-package: Support binary cachesEelco Dolstra1-10/+19
The .nixpkg file format is extended to optionally include the URL of a binary cache, which will be used in preference to the manifest URL (which can be set to a non-existent value).
2012-07-27 Allow a binary cache to declare that it doesn't support "nix-env -qas"Eelco Dolstra2-85/+121
Querying all substitutable paths via "nix-env -qas" is potentially hard on a server, since it involves sending thousands of HEAD requests. So a binary cache must now have a meta-info file named "nix-cache-info" that specifies whether the server wants this. It also specifies the store prefix so that we don't send useless queries to a binary cache for a different store prefix.
2012-07-27 Let build.cc verify the expected hash of a substituter's outputEelco Dolstra3-20/+9
Since SubstitutionGoal::finished() in build.cc computes the hash anyway, we can prevent the inefficiency of computing the hash twice by letting the substituter tell Nix about the expected hash, which can then verify it.
2012-07-27 download-using-manifests: Don't use nix-prefetch-urlEelco Dolstra2-42/+30
Instead call curl directly and pipe it into ‘nix-store --restore’. This saves I/O and prevents creating garbage in the Nix store.
2012-07-27 Remove trailing whitespace / tabsEelco Dolstra1-17/+17
2012-07-27 download-from-binary-cache: Only use the default cache for /nix/storeEelco Dolstra1-1/+3
2012-07-26 nix-push: Support generating a manifest againEelco Dolstra1-10/+34
This makes all the tests succeed. Woohoo!
2012-07-26 nix-push: Remove the upload featureEelco Dolstra1-51/+24
2012-07-26 download-from-binary-cache: Support file://Eelco Dolstra1-9/+14
The file:// URI schema requires checking for errors in a more general way. Also, don't cache file:// lookups.
2012-07-26 Merge branch 'master' into no-manifestsEelco Dolstra2-3/+7
2012-07-25 nix-profile.sh: Don't set NIX_REMOTE on single user installationsEelco Dolstra1-1/+1
Commit 6a214f3e06fa1c5f0a4d40e555f14d87691af297 reused the NixOS environment initialisation for nix-profile.sh, but this is inappropriate on systems that don't have multi-user support enabled.
2012-07-25 Subscribe to the Nixpkgs rather than NixOS channelEelco Dolstra1-2/+2
2012-07-23 nix-build: Support the ‘-’ argument to build an expression from stdinEelco Dolstra1-0/+4
2012-07-18 download-from-binary-cache: Print correct URLEelco Dolstra1-2/+5
2012-07-17 Print some debug outputEelco Dolstra1-8/+15
2012-07-11 Update the other substitutersEelco Dolstra2-69/+70
2012-07-11 Add some missing --version switchesEelco Dolstra2-0/+10
2012-07-11 Set the User-Agent header to "Nix/<version>"Eelco Dolstra1-0/+1
2012-07-11 download-from-binary-cache: Use HEAD requests if possibleEelco Dolstra1-12/+79
In "nix-env -qas", we don't need the substitute info, we just need to know if it exists. This can be done using a HTTP HEAD request, which saves bandwidth. Note however that curl currently has a bug that prevents it from reusing HTTP connections if HEAD requests return a 404: https://sourceforge.net/tracker/?func=detail&aid=3542731&group_id=976&atid=100976 Without the patch attached to the issue, using HEAD is actually quite a bit slower than GET.
2012-07-11 CleanupEelco Dolstra1-3/+3
2012-07-09 download-from-binary-cache: add nix.conf optionsEelco Dolstra1-3/+7
2012-07-08 CleanupEelco Dolstra1-13/+13
2012-07-06 download-from-binary-cache: parallelise fetching of NAR info filesEelco Dolstra1-76/+128
Getting substitute information using the binary cache substituter has non-trivial latency overhead. A package or NixOS system configuration can have hundreds of dependencies, and in the worst case (when the local info cache is empty) we have to do a separate HTTP request for each of these. If the ping time to the server is t, getting N info files will take tN seconds; e.g., with a ping time of 0.1s to nixos.org, sequentially downloading 1000 info files (a typical NixOS config) will take at least 100 seconds. To fix this problem, the binary cache substituter can now perform requests in parallel. This required changing the substituter interface to support a function querySubstitutablePathInfos() that queries multiple paths at the same time, and rewriting queryMissing() to take advantage of parallelism. (Due to local caching, parallelising queryMissing() is sufficient for most use cases, since it's almost always called before building a derivation and thus fills the local info cache.) For example, parallelism speeds up querying all 1056 paths in a particular NixOS system configuration from 116s to 2.6s. It works so well because the eccentricity of the top-level derivation in the dependency graph is only 9. So we only need 10 round-trips (when using an unlimited number of parallel connections) to get everything. Currently we do a maximum of 150 parallel connections to the server. Thus it's important that the binary cache server (e.g. nixos.org) has a high connection limit. Alternatively we could use HTTP pipelining, but WWW::Curl doesn't support it and libcurl has a hard-coded limit of 5 requests per pipeline.
2012-07-06 download-from-binary-cache: use WWW::CurlEelco Dolstra1-11/+68
Using WWW::Curl rather than running an external curl process for every NAR info file halves the time it takes to get info thanks to libcurl's support for persistent HTTP connections. (We save a roundtrip per file.) But the real gain will come from using parallel and/or pipelined requests.
2012-07-03 download-from-binary-cache: do negative NAR info cachingEelco Dolstra1-5/+29
I.e. if a NAR info file does *not* exist, we record it in the cache DB so that we don't retry it later.
2012-07-03 download-from-binary-cache: in queries, preferred cached infoEelco Dolstra1-20/+28
2012-07-03 download-from-binary-cache: strip trailing / from URLsEelco Dolstra1-1/+1
2012-07-03 download-from-binary-cache: cache binary cache info in a SQLite DBEelco Dolstra1-8/+117
2012-07-02 download-from-binary-cache: Verify NAR hashesEelco Dolstra1-6/+15
2012-07-02 nix-push: Always generate base-32 hashesEelco Dolstra1-2/+2
2012-07-02 Binary caches: use a better keyEelco Dolstra2-8/+13
Use the hash part of the store path as a key rather than a hash of the store path. This is enough to get the desired privacy property.
2012-07-01 Add an environment variable $NIX_BINARY_CACHES specifying URLs of binary cachesEelco Dolstra1-2/+7
2012-07-01 Allow both bzip2 and xz compressionEelco Dolstra2-25/+55
2012-06-29 nix-push: Don't pollute the current directory with result symlinkEelco Dolstra1-1/+1
2012-06-29 First attempt at the manifest-less substituterEelco Dolstra2-5/+121
2012-06-29 DohEelco Dolstra1-1/+1
2012-06-29 Use XZ compression in binary cachesEelco Dolstra1-13/+13
XZ compresses significantly better than bzip2. Here are the compression ratios and execution times (using 4 cores in parallel) on my /var/run/current-system (3.1 GiB): bzip2: total compressed size 849.56 MiB, 30.8% [2m08] xz -6: total compressed size 641.84 MiB, 23.4% [6m53] xz -7: total compressed size 621.82 MiB, 22.6% [7m19] xz -8: total compressed size 599.33 MiB, 21.8% [7m18] xz -9: total compressed size 588.18 MiB, 21.4% [7m40] Note that compression takes much longer. More importantly, however, decompression is much faster: bzip2: 1m47.274s xz -6: 0m55.446s xz -7: 0m54.119s xz -8: 0m52.388s xz -9: 0m51.842s The only downside to using -9 is that decompression takes a fair amount (~65 MB) of memory.
2012-06-28 nix-push: create a manifest-less binary cacheEelco Dolstra1-159/+93
Manifests are a huge pain, since users need to run nix-pull directly or indirectly to obtain them. They tend to be large and lag behind the available binaries; also, the downloaded manifests in /nix/var/nix/manifest need to be in sync with the Nixpkgs sources. So we want to get rid of them. The idea of manifest-free operation works as follows. Nix is configured with a set of URIs of binary caches, e.g. http://nixos.org/binary-cache Whenever Nix needs a store path X, it checks each binary cache for the existence of a file <CACHE-URI>/<SHA-256 hash of X>.narinfo, e.g. http://nixos.org/binary-cache/bi1gh9...ia17.narinfo The .narinfo file contains the necessary information about the store path that was formerly kept in the manifest, i.e., (relative) URI of the compressed NAR, references, size, hash, etc. For example: StorePath: /nix/store/xqp4l88cr9bxv01jinkz861mnc9p7qfi-neon-0.29.6 URL: 1bjxbg52l32wj8ww47sw9f4qz0r8n5vs71l93lcbgk2506v3cpfd.nar.bz2 CompressedHash: sha256:1bjxbg52l32wj8ww47sw9f4qz0r8n5vs71l93lcbgk2506v3cpfd CompressedSize: 202542 NarHash: sha256:1af26536781e6134ab84201b33408759fc59b36cc5530f57c0663f67b588e15f NarSize: 700440 References: 043zrsanirjh8nbc5vqpjn93hhrf107f-bash-4.2-p24 cj7a81wsm1ijwwpkks3725661h3263p5-glibc-2.13 ... Deriver: 4idz1bgi58h3pazxr3akrw4fsr6zrf3r-neon-0.29.6.drv System: x86_64-linux Nix then knows that it needs to download http://nixos.org/binary-cache/1bjxbg52l32wj8ww47sw9f4qz0r8n5vs71l93lcbgk2506v3cpfd.nar.bz2 to substitute the store path. Note that the store directory is omitted from the References and Deriver fields to save space, and that the URL can be relative to the binary cache prefix. This patch just makes nix-push create binary caches in this format. The next step is to make a substituter that supports them.
2012-05-31 Update nix profile: - incorporate NixOS's configuration so that nix is ↵Michel Alexandre Salim2-8/+47
usable by normal users - install as a data file, not a program file
2012-05-22 Generate binary tarballs for installing NixEelco Dolstra1-0/+34
For several platforms we don't currently have "native" Nix packages (e.g. Mac OS X and FreeBSD). This provides the next best thing: a tarball containing the closure of Nix, plus a simple script "nix-finish-install" that initialises the Nix database, registers the paths in the closure as valid, and runs "nix-env -i /path/to/nix" to initialise the user profile. The tarball must be unpacked in the root directory. It creates /nix/store/... and /usr/bin/nix-finish-install. Typical installation is as follows: $ cd / $ tar xvf /path/to/nix-1.1pre1234_abcdef-x86_64-linux.tar.bz2 $ nix-finish-install (if necessary add ~/.nix-profile/etc/profile.d/nix.sh to the shell login scripts) After this, /usr/bin/nix-finish-install can be deleted, if desired. The downside to the binary tarball is that it's pretty big (~55 MiB for x86_64-linux).
2012-05-22 Remove $FONTCONFIG_FILE hack from nix-profile.shEelco Dolstra1-7/+0
It's no longer needed because Nixpkgs' fontconfig uses /etc/fonts/fonts.conf as a default, just like other distributions.
2012-05-08 Remove obsolete files (moved to release tree)Eelco Dolstra4-157/+0
2012-05-07 nix-channel --update: allow updating only the specified channelsEelco Dolstra1-3/+6
2012-05-07 Now *really* prevent accumulation of old manifestsEelco Dolstra1-2/+4
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