about summary refs log tree commit diff
path: root/src/libstore/build.cc
AgeCommit message (Collapse)AuthorFilesLines
2012-10-02 Add a --repair flag to ‘nix-store -r’ to repair derivation outputsEelco Dolstra1-59/+94
With this flag, if any valid derivation output is missing or corrupt, it will be recreated by using a substitute if available, or by rebuilding the derivation. The latter may use hash rewriting if chroots are not available.
2012-10-02 Add operation ‘nix-store --repair-path’Eelco Dolstra1-28/+67
This operation allows fixing corrupted or accidentally deleted store paths by redownloading them using substituters, if available. Since the corrupted path cannot be replaced atomically, there is a very small time window (one system call) during which neither the old (corrupted) nor the new (repaired) contents are available. So repairing should be used with some care on critical packages like Glibc.
2012-09-28 Handle octal escapes in /proc/self/mountinfoEelco Dolstra1-2/+3
2012-09-28 Print a more descriptive error message if setting up the build environment failsEelco Dolstra1-3/+14
2012-09-19 Remove setting of the immutable bitEelco Dolstra1-11/+2
Using the immutable bit is problematic, especially in conjunction with store optimisation. For instance, if the garbage collector deletes a file, it has to clear its immutable bit, but if the file has additional hard links, we can't set the bit afterwards because we don't know the remaining paths. So now that we support having the entire Nix store as a read-only mount, we may as well drop the immutable bit. Unfortunately, we have to keep the code to clear the immutable bit for backwards compatibility.
2012-09-19 Templatise tokenizeString()Eelco Dolstra1-11/+8
2012-09-18 Keep build directory if not all expected outputs were producedEelco Dolstra1-3/+3
Fixes issue #123 in Nixpkgs.
2012-09-13 In startBuilder(), only print the new paths we're buildingEelco Dolstra1-2/+3
2012-09-12 Build hook: Pass the timeout to the remote builderEelco Dolstra1-1/+1
Note that this will only work if the client has a very recent Nix version (post 15e1b2c223494ecb5efefc3ea0e3b926a6b1d7dc), otherwise the --option flag will just be ignored. Fixes #50.
2012-09-11 Fix "non-zero padding" errorEelco Dolstra1-1/+2
Probably it's not a good idea to pass a temporary object to StringSource.
2012-09-11 Support building a derivation if some outputs are already valid (non-chroot ↵Eelco Dolstra1-11/+67
case) This uses scary hash rewriting. Fixes #21.
2012-09-11 Remove debug lineEelco Dolstra1-3/+1
2012-09-11 Support building a derivation if some outputs are already validEelco Dolstra1-12/+16
This handles the chroot and build hook cases, which are easy. Supporting the non-chroot-build case will require more work (hash rewriting!). Issue #21.
2012-08-27 Fix stupid type error in calling std::maxEelco Dolstra1-1/+1
2012-08-27 Merge branch 'master' into no-manifestsEelco Dolstra1-13/+30
2012-08-20 Check if MS_PRIVATE is definedEelco Dolstra1-1/+1
http://hydra.nixos.org/build/2955671
2012-08-20 In the chroot, make all mounted filesystems privateEelco Dolstra1-0/+18
This is required on systemd, which mounts filesystems as "shared" subtrees. Changes to shared trees in a private mount namespace are propagated to the outside world, which is bad.
2012-08-20 Don't bind-mount /proc since we mount our ownEelco Dolstra1-2/+2
2012-08-19 Fix 1755 permission on temporary directories left behind by ‘-K’Eelco Dolstra1-4/+4
2012-08-01 Drop the block count in the garbage collectorEelco Dolstra1-6/+5
2012-07-30 Refactor settings processingEelco Dolstra1-99/+77
Put all Nix configuration flags in a Settings object.
2012-07-30 Pass configuration settings to the substitutersEelco Dolstra1-0/+4
Previously substituters could read nix.conf themselves, but this didn't take --option flags into account.
2012-07-27 Let build.cc verify the expected hash of a substituter's outputEelco Dolstra1-6/+33
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 Remove more tabsEelco Dolstra1-9/+9
2012-07-27 Remove trailing whitespace / tabsEelco Dolstra1-130/+130
2012-07-26 Merge branch 'master' into no-manifestsEelco Dolstra1-1/+6
2012-07-26 Set permissions on temporary build directories to 0700Eelco Dolstra1-1/+2
Fixes #39.
2012-07-23 Automatically optimise the Nix store when a new path is addedEelco Dolstra1-0/+4
Auto-optimisation is enabled by default. It can be turned off by setting auto-optimise-store to false in nix.conf.
2012-07-18 Merge branch 'master' into no-manifestsEelco Dolstra1-12/+29
2012-07-17 Return an exit code of 100 for cached failed buildsEelco Dolstra1-0/+1
Exit code 100 should be returned for all permanent failures. This includes cached failures. Fixes #34.
2012-07-17 Update Nix 1.1 release notesEelco Dolstra1-0/+3
2012-07-17 Allow disabling log compressionEelco Dolstra1-12/+25
2012-07-08 build.cc: Don't use hasSubstitute()Eelco Dolstra1-11/+25
Instead make a single call to querySubstitutablePathInfo() per derivation output. This is faster and prevents having to implement the "have" function in the binary cache substituter.
2012-07-06 download-from-binary-cache: parallelise fetching of NAR info filesEelco Dolstra1-4/+6
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.
2012-06-27 nix-store -r: do substitutions in parallelEelco Dolstra1-4/+9
I.e. when multiple non-derivation arguments are passed to ‘nix-store -r’ to be substituted, do them in parallel.
2012-06-27 Mount an empty /dev/shm tmpfs in the chrootEelco Dolstra1-0/+6
This ensures that whatever the builder writes in /dev/shm is automatically cleaned up.
2012-06-27 Check the return code of the clone() callEelco Dolstra1-1/+2
2012-06-25 When using chroots, use a private PID namespaceEelco Dolstra1-154/+181
In a private PID namespace, processes have PIDs that are separate from the rest of the system. The initial child gets PID 1. Processes in the chroot cannot see processes outside of the chroot. This improves isolation between builds. However, processes on the outside can see processes in the chroot and send signals to them (if they have appropriate rights). Since the builder gets PID 1, it serves as the reaper for zombies in the chroot. This might turn out to be a problem. In that case we'll need to have a small PID 1 process that sits in a loop calling wait().
2012-06-25 Use a private UTS namespace to provide a deterministic host/domain name to ↵Eelco Dolstra1-1/+7
builders In chroot builds, set the host name to "localhost" and the domain name to "(none)" (the latter being the kernel's default). This improves determinism a bit further. P.S. I have to idea what UTS stands for.
2012-06-23 Improve error messageEelco Dolstra1-1/+1
2012-06-23 In chroot builds, use a private SysV IPC namespaceEelco Dolstra1-12/+19
This improves isolation a bit further, and it's just one extra flag in the unshare() call. P.S. It would be very cool to use CLONE_NEWPID (to put the builder in a private PID namespace) as well, but that's slightly more risky since having a builder start as PID 1 may cause problems.
2012-06-23 In chroot builds, use a private network namespaceEelco Dolstra1-6/+31
On Linux it's possible to run a process in its own network namespace, meaning that it gets its own set of network interfaces, disjunct from the rest of the system. We use this to completely remove network access to chroot builds, except that they get a private loopback interface. This means that: - Builders cannot connect to the outside network or to other processes on the same machine, except processes within the same build. - Vice versa, other processes cannot connect to processes in a chroot build, and open ports/connections do not show up in "netstat". - If two concurrent builders try to listen on the same port (e.g. as part of a test), they no longer conflict with each other. This was inspired by the "PrivateNetwork" flag in systemd.
2012-05-30 Compress build logs on the fly using bzip2Eelco Dolstra1-10/+44
2012-05-29 Add option ‘build-keep-log’ to enable/disable writing of build logsEelco Dolstra1-1/+4
Fixes #26.
2012-04-30 * Add an option ‘build-use-substitutes’, which can be set to ‘false’Eelco Dolstra1-1/+1
to disable use of substitutes; i.e., force building from source. Fixes Nix/221.
2012-04-30 Handle EPERM when creating a hard link for the chrootEelco Dolstra1-2/+5
There is a race condition when doing parallel builds with chroots and the immutable bit enabled. One process may call makeImmutable() before the other has called link(), in which case link() will fail with EPERM. We could retry or wrap the operation in a lock, but since this condition is rare and I'm lazy, we just use the existing copy fallback. Fixes #9.
2012-04-15 Close almost all file descriptors in the builderEelco Dolstra1-0/+3
This regression was accidentally introduced in 35355fc1fcffbe859395e360c0a6a1463f137d63.
2012-04-05 On Linux, pretend we're building on Linux 2.6Eelco Dolstra1-0/+11
Setting the UNAME26 personality causes "uname" to return "2.6.x", regardless of the kernel version. This improves determinism in a few misbehaved packages.
2012-03-05 Set the close-on-exec flag on file descriptorsEelco Dolstra1-3/+2
2012-03-05 Don't leak a file descriptor in commonChildInit()Eelco Dolstra1-0/+1
generated by cgit-pink 1.4.1 (git 2.44.2) at 2024-12-21T01·32+0000