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2024-03-12daemon: Address shortcoming in previous security fix for CVE-2024-27297.Ludovic Courtès
This is a followup to 8f4ffb3fae133bb21d7991e97c2f19a7108b1143. Commit 8f4ffb3fae133bb21d7991e97c2f19a7108b1143 fell short in two ways: (1) it didn’t have any effet for fixed-output derivations performed in a chroot, which is the case for all of them except those using “builtin:download” and “builtin:git-download”, and (2) it did not preserve ownership when copying, leading to “suspicious ownership or permission […] rejecting this build output” errors. * nix/libstore/build.cc (DerivationGoal::buildDone): Account for ‘chrootRootDir’ when copying ‘drv.outputs’. * nix/libutil/util.cc (copyFileRecursively): Add ‘fchown’ and ‘fchownat’ calls to preserve file ownership; this is necessary for chrooted fixed-output derivation builds. * nix/libutil/util.hh: Update comment. Change-Id: Ib59f040e98fed59d1af81d724b874b592cbef156
2024-03-11daemon: Protect against FD escape when building fixed-output derivations ↵Ludovic Courtès
(CVE-2024-27297). This fixes a security issue (CVE-2024-27297) whereby a fixed-output derivation build process could open a writable file descriptor to its output, send it to some outside process for instance over an abstract AF_UNIX socket, which would then allow said process to modify the file in the store after it has been marked as “valid”. Vulnerability discovered by puck <https://github.com/puckipedia>. Nix security advisory: https://github.com/NixOS/nix/security/advisories/GHSA-2ffj-w4mj-pg37 Nix fix: https://github.com/NixOS/nix/commit/244f3eee0bbc7f11e9b383a15ed7368e2c4becc9 * nix/libutil/util.cc (readDirectory): Add variants that take a DIR* and a file descriptor. Rewrite the ‘Path’ variant accordingly. (copyFile, copyFileRecursively): New functions. * nix/libutil/util.hh (copyFileRecursively): New declaration. * nix/libstore/build.cc (DerivationGoal::buildDone): When ‘fixedOutput’ is true, call ‘copyFileRecursively’ followed by ‘rename’ on each output. Change-Id: I7952d41093eed26e123e38c14a4c1424be1ce1c4 Reported-by: Picnoir <picnoir@alternativebit.fr>, Théophane Hufschmitt <theophane.hufschmitt@tweag.io> Change-Id: Idb5f2757f35af86b032a9851cecb19b70227bd88
2024-01-05daemon: Change default ‘timeout’ and ‘max-silent-time’ values.Ludovic Courtès
Having a timeout seems generally preferable as it makes sure build slots are not kept busy for no good reason (few package builds, if any, are expected to exceed these values). * nix/libstore/globals.cc (Settings::Settings): Change ‘maxSilentTime’ and ‘buildTimeout’. * gnu/services/base.scm (<guix-configuration>)[max-silent-time] [timeout]: Change default values. * doc/guix.texi (Invoking guix-daemon, Base Services): Adjust accordingly. Change-Id: I25c50893f3f7fcca451b8f093d9d4d1a15fa58d8
2023-12-17daemon: Fix my own whitespace errors.Tobias Geerinckx-Rice
This follows up on commit d993ed43b2bae8717437aa27d9d33fd223a6411f and was entirely predictable. The noise, sorry for it. Change-Id: I8ddb8cfe33db3864949f6589cc091616a90ebc5b
2023-12-10daemon: Sacrifice builders on OOM.Tobias Geerinckx-Rice
* nix/libstore/build.cc (DerivationGoal::runChild): Maximise our OOM score adjustment. Change-Id: I418c763b499ca16e1ffe3c6033319112b9744f51
2023-12-11daemon: Implement ‘substitute-urls’ RPC.Ludovic Courtès
* nix/libstore/worker-protocol.hh (PROTOCOL_VERSION): Bump. (WorkerOp): Add ‘wopSubstituteURLs’. * nix/nix-daemon/nix-daemon.cc (performOp): Implement it. * guix/store.scm (%protocol-version): Bump. (operation-id): Add ‘substitute-urls’. (substitute-urls): New procedure. * tests/store.scm ("substitute-urls, default") ("substitute-urls, client-specified URLs") ("substitute-urls, disabled"): New tests. Change-Id: I2c0119500c3a1eecfa5ebf32463ffb0f173161de
2023-12-04daemon: Simplify “empty status” substitute error message.Ludovic Courtès
* nix/libstore/build.cc (SubstitutionGoal::finished): Don’t show what the empty status looks like. Change-Id: Ie898432aeb047aff3d59024de6ed6d18f68903c4
2023-09-24Revert "build: Add missing guix-gc.timer file to binary tarball."Tobias Geerinckx-Rice
This reverts commit 69f6edc1a8596d2cb4c67e0435d35633af6f3cbc. The intention is good, but nodist_systemdservice_DATA are meant to be disposable artefacts generated from corresponding ‘.in’ files. etc/guix-gc.timer doesn't fit that description, breaking builds: $ make clean && make … make[2]: *** No rule to make target 'etc/guix-gc.timer', needed by 'all-am'. Stop.
2023-09-26daemon: Add “git-download” built-in builder.Ludovic Courtès
The new builder makes it possible to break cycles that occurs when the fixed-output derivation for the source of a dependency of ‘git’ would itself depend on ‘git’. * guix/scripts/perform-download.scm (perform-git-download): New procedure. (perform-download): Move fixed-output derivation check to… (guix-perform-download): … here. Invoke ‘perform-download’ or ‘perform-git-download’ depending on what ‘derivation-builder’ returns. * nix/libstore/builtins.cc (builtins): Add “git-download”. * tests/derivations.scm ("built-in-builders"): Update. ("'git-download' built-in builder") ("'git-download' built-in builder, invalid hash") ("'git-download' built-in builder, invalid commit") ("'git-download' built-in builder, not found"): New tests.
2023-09-09daemon: Fix build with GCC 13.Sören Tempel
The sqlite.hh file uses fixed-width integer types from stdint.h. As such, it needs to include <cstdint>. Without this include, the file doesn't compile successfully with GCC13. See: https://gcc.gnu.org/gcc-13/porting_to.html#header-dep-changes * nix/libstore/sqlite.hh: include <cstdint> Signed-off-by: Sören Tempel <soeren@soeren-tempel.net> Signed-off-by: Ludovic Courtès <ludo@gnu.org>
2023-08-31build: Add missing guix-gc.timer file to binary tarball.Maxim Cournoyer
Partially fixes <https://issues.guix.gnu.org/65117>. * nix/local.mk (nodist_systemdservice_DATA): Add etc/guix-gc.timer.
2023-01-09daemon: Improve error message for wrong hash sizes.Ludovic Courtès
* nix/libutil/hash.cc (parseHash): Show the hash algorithm name and expected size in the error message. * tests/derivations.scm ("fixed-output derivation, invalid hash size"): New test.
2022-12-18daemon: Make "opening file" error messages distinguishable.Ludovic Courtès
* nix/libstore/build.cc (DerivationGoal::openLogFile): Customize "opening file" error message. * nix/libutil/hash.cc (hashFile): Likewise. * nix/libutil/util.cc (readFile, writeFile): Likewise.
2022-10-17Revert "nix: Guard against removing temporary roots of living processes."Ludovic Courtès
This reverts commit bb0beaecdee1a2315a1269b1746d238c8ab0e699. This change broke a number of tests that assumed the previous behavior.
2022-10-07nix: Guard against removing temporary roots of living processes.Ludovic Courtès
Fixes <https://issues.guix.gnu.org/25018>. * nix/libstore/gc.cc (readTempRoots): Add a check to guard against removing the temporary roots of a living process. Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
2022-09-11daemon: Remove unused function findOutput.Maxime Devos
* nix/libstore/misc.cc (findOutput): Remove it. * nix/libstore/misc.hh (findOutput): Likewise. Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
2022-09-11daemon: Remove unused function exportPaths.Maxime Devos
* nix/libstore/store-api.cc (exportPaths): Remove it. * nix/libstore/store-api.hh (exportPaths): Likewise. Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
2022-09-11daemon: Remove unused function openStore.Maxime Devos
* nix/libstore/store-api.cc (openStore): Remove it. * nix/libstore/store-api.hh (openStore): Likewise. Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
2022-06-05daemon: Quote consistently within a string.Tobias Geerinckx-Rice
* nix/libstore/build.cc (DerivationGoal::registerOutput): ‘’ → `'.
2022-05-29daemon: Clarify ‘--check’ error when outputs are missing.Tobias Geerinckx-Rice
Drop the confusing ‘invalid’ jargon and display a hint like we do for ‘--fallback’. * nix/libstore/build.cc (DerivationGoal::outputsSubstituted): Rewrite error message.
2022-05-18daemon: runChild() is forbidden to talk during environment set upyarl-baudig@mailoo.org
DerivationGoal::startBuilder() is waiting for an empty line as a check that the environment set up is fine. Fixes <https://issues.guix.gnu.org/55324>. * nix/libstore/build.cc (DerivationGoal::runChild): Remove 'debug' statement corresponding to bind mounts. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
2022-04-14daemon: Support systemd-style socket activation.Ludovic Courtès
* nix/nix-daemon/guix-daemon.cc (SD_LISTEN_FDS_START): New macro. (systemd_activation_sockets): New function. (main): Use it. Remove obsolete 'printMsg' call. * doc/guix.texi (Invoking guix-daemon): Document socket activation.
2022-01-18daemon: Always default to gzip for log compression.Ludovic Courtès
* nix/libstore/globals.cc (Settings::Settings): Have 'logCompression' default to COMPRESSION_GZIP unconditionally. * gnu/services/base.scm (<guix-configuration>)[log-compression]: Default to 'gzip. * doc/guix.texi (Invoking guix-daemon, Base Services): Adjust accordingly.
2021-11-27daemon: Print the line whence we expect an integer.Tobias Geerinckx-Rice
* nix/libstore/local-store.cc (LocalStore::getLineFromSubstituter): Include the malformed substituter stream line in the error message.
2021-11-25daemon: Read substitute nar size as 'unsigned long long'.Ludovic Courtès
Fixes <https://issues.guix.gnu.org/46212>. Reported by Christopher Baines <mail@cbaines.net>. Previously, the nar size returned by 'guix substitute' would be read as an 'int'; thus, values above 2^31 - 1 would be read and then stored as negative integers in the database. Regression introduced in 9dfa20a22ae0be3d3b01a7b3d422af97428c627e. * nix/libstore/build.cc (SubstitutionGoal::finished): Use templatized 'string2Int' instead of 'std::atoi' to get an 'unsigned long long', which is the type of 'hash.second'. * tests/store.scm ("substitute and large size"): New test.
2021-11-25daemon: Read unsigned nar size and download size from substituter.Ludovic Courtès
Fixes <https://issues.guix.gnu.org/51983>. Reported by Tobias Geerinckx-Rice <me@tobias.gr>. * nix/libstore/local-store.cc (LocalStore::querySubstitutablePathInfos): Expect 'unsigned long long' for 'downloadSize' and 'narSize'. * tests/store.scm ("substitute query and large size"): New test.
2021-11-19daemon: Micro-optimize 'deletePath'.Ludovic Courtès
'remove' calls 'unlink' first and falls back to 'rmdir' upon EISDIR. This change gets rid of the 'unlink' call for every directory being removed. * nix/libutil/util.cc (_deletePath): Call 'unlink' or 'rmdir' depending on 'st.st_mode', rather than call 'remove'.
2021-11-16daemon: Do not deduplicate files smaller than 8 KiB.Ludovic Courtès
Files smaller than 8 KiB typically represent ~70% of the entries in /gnu/store/.links but only contribute to ~4% of the space savings afforded by deduplication. Not considering these files for deduplication speeds up file insertion in the store and, more importantly, leaves 'removeUnusedLinks' with fewer entries to traverse, thereby speeding it up proportionally. Partly fixes <https://issues.guix.gnu.org/24937>. * config-daemon.ac: Remove symlink hard link check and CAN_LINK_SYMLINK definition. * guix/store/deduplication.scm (%deduplication-minimum-size): New variable. (deduplicate)[loop]: Do not recurse when FILE's size is below %DEDUPLICATION-MINIMUM-SIZE. (dump-port): New procedure. (dump-file/deduplicate)[hash]: Turn into... [dump-and-compute-hash]: ... this thunk. Call 'deduplicate' only when SIZE is greater than %DEDUPLICATION-MINIMUM-SIZE; otherwise call 'dump-port'. * nix/libstore/gc.cc (LocalStore::removeUnusedLinks): Drop files where st.st_size < deduplicationMinSize. * nix/libstore/local-store.hh (deduplicationMinSize): New declaration. * nix/libstore/optimise-store.cc (deduplicationMinSize): New variable. (LocalStore::optimisePath_): Return when PATH is a symlink or smaller than 'deduplicationMinSize'. * tests/derivations.scm ("identical files are deduplicated"): Produce files bigger than %DEDUPLICATION-MINIMUM-SIZE. * tests/nar.scm ("restore-file-set with directories (signed, valid)"): Likewise. * tests/store-deduplication.scm ("deduplicate, below %deduplication-minimum-size"): New test. ("deduplicate", "deduplicate, ENOSPC"): Produce files bigger than %DEDUPLICATION-MINIMUM-SIZE. * tests/store.scm ("substitute, deduplication"): Likewise.
2021-10-01build: Don’t delete ‘guix-gc.timer’ file.Xinglu Chen
Without this invoking ‘make clean’ would remove ‘guix-gc.timer’, and ‘make’ would fail with. make[2]: *** No rule to make target 'etc/guix-gc.timer', needed by 'all-am'. Stop. * nix/local.mk (nodist_systemdservice_DATA): Remove ‘guix-gc.timer’.
2021-09-20etc: Add systemd files for running ‘guix gc’ periodicallyThiago Jung Bauermann
* etc/guix-gc.service.in: New file. * etc/guix-gc.timer: Likewise. * .gitignore: Ignore generated ‘guix-gc.service’. * nix/local.mk (nodist_systemdservice_DATA): Add ‘guix-gc.service’ and ‘guix-gc.timer’. (EXTRA_DIST): Add ‘guix-gc.service.in’ and ‘guix-gc.timer’. * doc/guix.texi (Binary Installation): Mention the new systemd files. Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
2021-04-09daemon: 'guix substitute' replies on FD 4.Ludovic Courtès
This avoids the situation where error messages would unintentionally go to stderr and be wrongfully interpreted as a reply by the daemon. Fixes <https://bugs.gnu.org/46362>. This is a followup to ee3226e9d54891c7e696912245e4904435be191c. * guix/scripts/substitute.scm (display-narinfo-data): Add 'port' parameter and honor it. (process-query): Likewise. (process-substitution): Likewise. (%error-to-file-descriptor-4?, with-redirected-error-port): Remove. (%reply-file-descriptor): New variable. (guix-substitute): Remove use of 'with-redirected-error-port'. Define 'reply-port' and pass it to 'process-query' and 'process-substitution'. * nix/libstore/build.cc (SubstitutionGoal::handleChildOutput): Swap 'builderOut' and 'fromAgent'. * nix/libstore/local-store.cc (LocalStore::getLineFromSubstituter): Likewise. * tests/substitute.scm <top level>: Set '%reply-file-descriptor' rather than '%error-to-file-descriptor-4?'.
2021-04-03daemon: Remove dead code.Ludovic Courtès
Reported by Noisytoot on #guix. * nix/nix-daemon/shared.hh (showManPage): Remove. * nix/nix-daemon/nix-daemon.cc (printHelp, programId): Remove.
2021-03-30gnu: guix: Fix openrc init scripts.zimoun
Fixes <https://bugs.gnu.org/46871>. * gnu/packages/package-management.scm (guix)[arguments]: Fix openrc init. * nix/local.mk (openrcservicedir): Likewise. Signed-off-by: Efraim Flashner <efraim@flashner.co.il>
2021-03-18daemon: Prevent privilege escalation with '--keep-failed' [security].Ludovic Courtès
Fixes <https://bugs.gnu.org/47229>. Reported by Nathan Nye of WhiteBeam Security. * nix/libstore/build.cc (DerivationGoal::startBuilder): When 'useChroot' is true, add "/top" to 'tmpDir'. (DerivationGoal::deleteTmpDir): Adjust accordingly. When 'settings.keepFailed' is true, chown in two steps: first the "/top" sub-directory, and then rename "/top" to its parent.
2021-03-17daemon: Correctly handle '--discover' with no value.Ludovic Courtès
Previously, we'd get: $ guix-daemon --discover error: basic_string::_M_construct null not valid * nix/nix-daemon/guix-daemon.cc (parse_opt): Change second argument to 'settings.set' to properly handle case where ARG is NULL.
2020-12-19daemon: Delegate deduplication to 'guix substitute'.Ludovic Courtès
This removes the main source of latency between subsequent downloads. * nix/libstore/build.cc (SubstitutionGoal::tryToRun): Add a "deduplicate" key to ENV. (SubstitutionGoal::finished): Remove call to 'optimisePath'. * guix/scripts/substitute.scm (process-substitution)[destination-in-store?] [dump-file/deduplicate*]: New variables. Pass #:dump-file to 'restore-file'. * guix/scripts/substitute.scm (guix-substitute)[deduplicate?]: New variable. Pass #:deduplicate? to 'process-substitution'. * guix/serialization.scm (dump-file): Export and augment 'dump-file'.
2020-12-19daemon: Do not reset timestamps and permissions on substituted items.Ludovic Courtès
'guix substitute' now takes care of it via 'restore-file'. * nix/libstore/build.cc (SubstitutionGoal::finished): Remove call to 'canonicalisePathMetaData'.
2020-12-19daemon: Let 'guix substitute' perform hash checks.Ludovic Courtès
This way, the hash of the store item can be computed as it is restored, thereby avoiding an additional file tree traversal ('hashPath' call) later on in the daemon. Consequently, it should reduce latency between subsequent substitute downloads. This is a followup to 5ff521452b9ec2aae9ed8e4bb7bdc250a581f203. * guix/scripts/substitute.scm (narinfo-hash-algorithm+value): New procedure. (process-substitution): Wrap INPUT into a hash input port, 'hashed', and read from it. Compare the actual and expected hashes, and print a "hash-mismatch" status line when they differ. When they match, print not just "success" but also the nar hash and size. * nix/libstore/build.cc (class SubstitutionGoal)[expectedHashStr]: Remove. (SubstitutionGoal::finished): Tokenize 'status'. Parse it and handle "success" and "hash-mismatch" accordingly. Call 'hashPath' only when the returned hash is not SHA256. (SubstitutionGoal::handleChildOutput): Remove 'expectedHashStr' handling. * tests/substitute.scm ("substitute, invalid hash"): Rename to... ("substitute, invalid narinfo hash"): ... this. ("substitute, invalid hash"): New test.
2020-12-08daemon: Raise an error if substituter doesn't send the expected hash.Ludovic Courtès
It was already impossible in practice for 'expectedHashStr' to be empty if 'status' == "success". * nix/libstore/build.cc (SubstitutionGoal::finished): Throw 'SubstError' when 'expectedHashStr' is empty.
2020-12-08substitute: Cache and reuse connections while substituting.Ludovic Courtès
That way, when fetching a series of substitutes from the same server(s), the connection is reused instead of being closed/opened for each substitutes, which saves on network round trips and TLS handshakes. * guix/http-client.scm (http-fetch): Add #:keep-alive? and honor it. * guix/progress.scm (progress-report-port): Add #:close? parameter and honor it. * guix/scripts/substitute.scm (at-most): Return the tail as a second value. (fetch): Add #:port and #:keep-alive? and honor them. (%max-cached-connections): New variable. (open-connection-for-uri/cached, call-with-cached-connection): New procedures. (with-cached-connection): New macro. (process-substitution): Wrap 'fetch' call in 'with-cached-connection'. Pass #:close? to 'progress-report-port'.
2020-12-08daemon: Run 'guix substitute --substitute' as an agent.Ludovic Courtès
This avoids spawning one substitute process per substitution. * nix/libstore/build.cc (class Worker)[substituter]: New field. [outPipe, logPipe, pid]: Remove. (class SubstitutionGoal)[expectedHashStr, status, substituter]: New fields. (SubstitutionGoal::timedOut): Adjust to check 'substituter'. (SubstitutionGoal::tryToRun): Remove references to 'outPipe' and 'logPipe'. Run "guix substitute --substitute" as an 'Agent'. Send the request with 'writeLine'. (SubstitutionGoal::finished): Likewise. (SubstitutionGoal::handleChildOutput): Change to fill in 'expectedHashStr' and 'status'. (SubstitutionGoal::handleEOF): Call 'wakeUp' unconditionally. (SubstitutionGoal::~SubstitutionGoal): Adjust to check 'substituter'. * guix/scripts/substitute.scm (process-substitution): Write "success\n" to stdout upon success. (%error-to-file-descriptor-4?): New variable. (guix-substitute): Set 'current-error-port' to file descriptor 4 unless (%error-to-file-descriptor-4?) is false. Remove "--substitute" arguments. Loop reading line from stdin. * tests/substitute.scm <top level>: Call '%error-to-file-descriptor-4?'. (request-substitution): New procedure. ("substitute, no signature") ("substitute, invalid hash") ("substitute, unauthorized key") ("substitute, authorized key") ("substitute, unauthorized narinfo comes first") ("substitute, unsigned narinfo comes first") ("substitute, first narinfo is unsigned and has wrong hash") ("substitute, first narinfo is unsigned and has wrong refs") ("substitute, two invalid narinfos") ("substitute, narinfo with several URLs"): Adjust to new "guix substitute --substitute" calling convention.
2020-12-08daemon: Factorize substituter agent spawning.Ludovic Courtès
* nix/libstore/local-store.hh (class LocalStore)[substituter]: New method. [runningSubstituter]: Turn into a shared_ptr. * nix/libstore/local-store.cc (LocalStore::querySubstitutablePaths): Call 'substituter' instead of using inline code. (LocalStore::querySubstitutablePathInfos): Likewise. (LocalStore::substituter): New method.
2020-12-08daemon: Use 'Agent' to spawn 'guix substitute --query'.Ludovic Courtès
* nix/libstore/local-store.hh (RunningSubstituter): Remove. (LocalStore)[runningSubstituter]: Change to unique_ptr<Agent>. [setSubstituterEnv, didSetSubstituterEnv]: Remove. [getLineFromSubstituter, getIntLineFromSubstituter]: Take an 'Agent'. * nix/libstore/local-store.cc (LocalStore::~LocalStore): Remove reference to 'runningSubstituter'. (LocalStore::setSubstituterEnv, LocalStore::startSubstituter): Remove. (LocalStore::getLineFromSubstituter): Adjust to 'run' being an 'Agent'. (LocalStore::querySubstitutablePaths): Spawn substituter agent if needed. Adjust to 'Agent' interface. (LocalStore::querySubstitutablePathInfos): Likewise. * nix/libstore/build.cc (SubstitutionGoal::tryToRun): Remove call to 'setSubstituterEnv' and add 'setenv' call for "_NIX_OPTIONS" instead. (SubstitutionGoal::finished): Remove 'readLine' call for 'dummy'. * guix/scripts/substitute.scm (%allow-unauthenticated-substitutes?): Remove second argument to 'make-parameter'. (process-query): Call 'warn-about-missing-authentication' when (%allow-unauthenticated-substitutes?) is #t. (guix-substitute): Wrap body in 'parameterize'. Set 'guix-warning-port' too. No longer exit when 'substitute-urls' returns the empty list. No longer print newline initially. * tests/substitute.scm (test-quit): Parameterize 'current-error-port' to account for the port changes in 'guix-substitute'.
2020-12-08daemon: 'Agent' constructor takes a list of environment variables.Ludovic Courtès
* nix/libutil/util.hh (struct Agent)[Agent]: Add 'env' parameter. * nix/libutil/util.cc (Agent::Agent): Honor it.
2020-12-01daemon: Remove unneeded forward declaration.Ludovic Courtès
This is a followup to ee9dff34f9317509cb2b833d07a0d5e01a36a4ae. * nix/libstore/build.cc: Remove 'struct Agent' forward declaration.
2020-11-29daemon: Remove pre-Guix hack.Ludovic Courtès
* nix/libstore/build.cc (DerivationGoal::startBuilder): Remove "NIX_OUTPUT_CHECKED" hack.
2020-11-29Use substitute servers on the local network.Mathieu Othacehe
* guix/scripts/discover.scm: New file. * Makefile.am (MODULES): Add it. * nix/nix-daemon/guix-daemon.cc (options): Add "discover" option, (parse-opt): parse it, (main): start "guix discover" process when the option is set. * guix/scripts/substitute.scm (%local-substitute-urls): New variable, (substitute-urls): add it. * gnu/services/base.scm (<guix-configuration>): Add "discover?" field, (guix-shepherd-service): honor it. * doc/guix.texi (Invoking guix-daemon): Document "discover" option, (Base Services): ditto.
2020-10-27maint: Add 'etc/gnu-store.mount.in' to the distribution.Ludovic Courtès
Reported by Vagrant Cascadian. * nix/local.mk (EXTRA_DIST): Add 'etc/gnu-store.mount.in'.
2020-10-09nix: Honor '--rounds' when also using '--check'.Maxim Cournoyer
Fixes <https://issues.guix.gnu.org/40144>. Until now, the '--rounds' option, when also using '--check', was ignored. This change makes it possible to use both, so that an item that has already been built once can be rebuilt as many times as desired. * nix/libstore/build.cc: Remove the conditionals causing the daemon to complete a build task early when 'buildMode' is equal to 'nix::bmCheck'. Reported-by: Brice Waegeneire <brice@waegenei.re>
2020-10-01daemon: Try to execute derivation builders only for matching OS kernels.Ludovic Courtès
Fixes <https://bugs.gnu.org/43668>. Previously, guix-daemon would try to run GNU/Hurd executables on GNU/Linux. execve(2) would succeed, but the executable would immediately crash. This change prevents it from attempting to execute "i586-gnu" code on "*-linux", while preserving the binfmt_misc-friendly behavior implemented in commit 7bf2a70a4ffd976d50638d3b9f2ec409763157df. * nix/libstore/build.cc (sameOperatingSystemKernel): New function. (DerivationGoal::runChild): Call 'execve' only when 'sameOperatingSystemKernel' returns true.
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