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2013-06-07Process stderr from substituters while doing have/info queriesEelco Dolstra
2013-06-07Buffer reads from the substituterEelco Dolstra
This greatly reduces the number of system calls.
2013-05-23nix-store --export: Export paths in topologically sorted orderEelco Dolstra
Fixes #118.
2013-05-16Show function names in error messagesEelco Dolstra
Functions in Nix are anonymous, but if they're assigned to a variable/attribute, we can use the variable/attribute name in error messages, e.g. while evaluating `concatMapStrings' at `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/strings.nix:18:25': ...
2013-05-16Show which function argument was unexpectedEelco Dolstra
Fixes #116.
2013-05-16Shut up a compiler warningEelco Dolstra
2013-05-10In trace messages, don't print the output pathEelco Dolstra
This doesn't work if there is no output named "out". Hydra didn't use it anyway.
2013-05-09Communicate build timeouts to HydraEelco Dolstra
2013-05-09build-remote.pl: Enforce timeouts locallyEelco Dolstra
Don't pass --timeout / --max-silent-time to the remote builder. Instead, let the local Nix process terminate the build if it exceeds a timeout. The remote builder will be killed as a side-effect. This gives better error reporting (since the timeout message from the remote side wasn't properly propagated) and handles non-Nix problems like SSH hangs.
2013-05-01Don't let stderr writes in substituters cause a deadlockEelco Dolstra
2013-04-26addAdditionalRoots(): Check each path only onceEelco Dolstra
2013-04-23Fix --timeoutEelco Dolstra
I'm not sure if it has ever worked correctly. The line "lastWait = after;" seems to mean that the timer was reset every time a build produced log output. Note that the timeout is now per build, as documented ("the maximum number of seconds that a builder can run").
2013-04-23Nix daemon: respect build timeout from the clientEelco Dolstra
2013-04-04Complain if /homeless-shelter existsEelco Dolstra
2013-03-25makeStoreWritable: Ask forgiveness, not permissionShea Levy
It is surprisingly impossible to check if a mountpoint is a bind mount on Linux, and in my previous commit I forgot to check if /nix/store was even a mountpoint at all. statvfs.f_flag is not populated with MS_BIND (and even if it were, my check was wrong in the previous commit). Luckily, the semantics of mount with MS_REMOUNT | MS_BIND make both checks unnecessary: if /nix/store is not a mountpoint, then mount will fail with EINVAL, and if /nix/store is not a bind-mount, then it will not be made writable. Thus, if /nix/store is not a mountpoint, we fail immediately (since we don't know how to make it writable), and if /nix/store IS a mountpoint but not a bind-mount, we fail at first write (see below for why we can't check and fail immediately). Note that, due to what is IMO buggy behavior in Linux, calling mount with MS_REMOUNT | MS_BIND on a non-bind readonly mount makes the mountpoint appear writable in two places: In the sixth (but not the 10th!) column of mountinfo, and in the f_flags member of struct statfs. All other syscalls behave as if the mount point were still readonly (at least for Linux 3.9-rc1, but I don't think this has changed recently or is expected to soon). My preferred semantics would be for MS_REMOUNT | MS_BIND to fail on a non-bind mount, as it doesn't make sense to remount a non bind-mount as a bind mount.
2013-03-25makeStoreWritable: Use statvfs instead of /proc/self/mountinfo to find out ↵Shea Levy
if /nix/store is a read-only bind mount /nix/store could be a read-only bind mount even if it is / in its own filesystem, so checking the 4th field in mountinfo is insufficient. Signed-off-by: Shea Levy <shea@shealevy.com>
2013-03-14Fix building against Bison 2.6Eelco Dolstra
2013-03-14Make sure that thunks are restored properly if an exception occursEelco Dolstra
Fixes Hydra bug #67.
2013-03-08Revert "Prevent config.h from being clobbered"Eelco Dolstra
This reverts commit 28bba8c44f484eae38e8a15dcec73cfa999156f6.
2013-03-07Prevent config.h from being clobberedEelco Dolstra
2013-02-28Handle systems without lutimes() or lchown()Eelco Dolstra
2013-02-28Handle symlinks properlyEelco Dolstra
Now it's really brown paper bag time...
2013-02-27Handle hard links to other files in the outputEelco Dolstra
2013-02-27Refactoring: Split off the non-recursive canonicalisePathMetaData()Eelco Dolstra
Also, change the file mode before changing the owner. This prevents a slight time window in which a setuid binary would be setuid root.
2013-02-26Security: Don't allow builders to change permissions on files they don't ownEelco Dolstra
It turns out that in multi-user Nix, a builder may be able to do ln /etc/shadow $out/foo Afterwards, canonicalisePathMetaData() will be applied to $out/foo, causing /etc/shadow's mode to be set to 444 (readable by everybody but writable by nobody). That's obviously Very Bad. Fortunately, this fails in NixOS's default configuration because /nix/store is a bind mount, so "ln" will fail with "Invalid cross-device link". It also fails if hard-link restrictions are enabled, so a workaround is: echo 1 > /proc/sys/fs/protected_hardlinks The solution is to check that all files in $out are owned by the build user. This means that innocuous operations like "ln ${pkgs.foo}/some-file $out/" are now rejected, but that already failed in chroot builds anyway.
2013-02-19build-remote: Use the --quiet flagEelco Dolstra
‘--option verbosity 0’ doesn't actually do anything.
2013-02-19Add `Settings::nixDaemonSocketFile'.Ludovic Courtès
2013-02-19Enable chroot support on old glibc versions.Ludovic Courtès
2013-02-08Make "${./path} ..." evaluate to a string, not a pathEelco Dolstra
Wacky string coercion semantics caused expressions like exec = "${./my-script} params..."; to evaluate to a path (‘/path/my-script params’), because anti-quotations are desuged to string concatenation: exec = ./my-script + " params..."; By constrast, adding a space at the start would yield a string as expected: exec = " ${./my-script} params..."; Now the first example also evaluates to a string.
2013-02-08Rename "hash" to "hashString" and handle SHA-1Eelco Dolstra
2013-02-08experimental/hashMarc Weber
adding primop function calculating hash of a string Signed-off-by: Marc Weber <marco-oweber@gmx.de>
2013-01-30Support the coloniesEelco Dolstra
2013-01-23Only warn about SQLite being busy onceEelco Dolstra
No need to get annoying.
2013-01-22Correctly handle missing logsEelco Dolstra
2013-01-17Store build logs in /nix/var/log/nix/drvs/<XX>Eelco Dolstra
...where <XX> is the first two characters of the derivation. Otherwise /nix/var/log/nix/drvs may become so large that we run into all sorts of weird filesystem limits/inefficiences. For instance, ext3/ext4 filesystems will barf with "ext4_dx_add_entry:1551: Directory index full!" once you hit a few million files.
2013-01-05Delete a left-over trash directory before doing a GCEelco Dolstra
2013-01-04Fix "0 store paths deleted" messageEelco Dolstra
2013-01-03Open the database after removing immutable bitsEelco Dolstra
2013-01-03Remove tabsEelco Dolstra
2013-01-03Clear any immutable bits in the Nix storeEelco Dolstra
Doing this once makes subsequent operations like garbage collecting more efficient since we don't have to call makeMutable() first.
2013-01-02If a substitute closure is incomplete, build dependencies, then retry the ↵Eelco Dolstra
substituter Issue #77.
2013-01-02Automatically fall back if the references of a substitute are not substitutableEelco Dolstra
Fixes #77.
2012-12-29nix-build: Support talking to old daemonsEelco Dolstra
Fixes #76.
2012-12-29Allow mounting a path in a different location in the chrootEelco Dolstra
Fixes #24.
2012-12-20nix-store -q --roots: Respect the gc-keep-outputs/gc-keep-derivations settingsEelco Dolstra
So if a path is not garbage solely because it's reachable from a root due to the gc-keep-outputs or gc-keep-derivations settings, ‘nix-store -q --roots’ now shows that root.
2012-12-20Yet another rewrite of the garbage collectorEelco Dolstra
But this time it's *obviously* correct! No more segfaults due to infinite recursions for sure, etc. Also, move directories to /nix/store/trash instead of renaming them to /nix/store/bla-gc-<pid>. Then we can just delete /nix/store/trash at the end.
2012-12-19If gc-keep-derivations is set, only keep the actual deriverEelco Dolstra
This prevents zillions of derivations from being kept, and fixes an infinite recursion in the garbage collector (due to an obscure cycle that can occur with fixed-output derivations).
2012-12-19Kill the build hook rather than shutting it down cleanlyEelco Dolstra
Waiting for the hook to shut down cleanly sometimes seems to lead to hangs.
2012-12-18Revert brain fartEelco Dolstra
This reverts commit cc511fd65b7b6de9e87e72fb4bed16fc7efeb8b7.
2012-12-18Check for potential infinite select() loops when buildingEelco Dolstra