Age | Commit message (Expand) | Author |
2018-06-14 | Remove 'guix-register' and its traces....* Makefile.am (SH_TESTS): Remove tests/guix-register.sh.
* build-aux/pre-inst-env.in (GUIX_REGISTER): Remove.
* gnu/build/install.scm (directives): Remove outdated comment.
* gnu/build/vm.scm (root-partition-initializer): Update comment.
* gnu/packages/package-management.scm (guix-register): Remove.
* guix/config.scm.in (%sbindir, %guix-register-program): Remove.
* guix/scripts/system.scm (install): Adjust docstring.
* guix/self.scm (make-config.scm): Remove #:guix. Do not generate
%sbindir and %guix-register-program.
(specification->package): Remove "guix".
* nix/guix-register/guix-register.cc: Remove.
* nix/libstore/store-api.cc (decodeValidPathInfo): Remove.
* nix/libstore/store-api.hh (decodeValidPathInfo): Remove declaration.
* nix/local.mk (sbin_PROGRAMS, guix_register_SOURCES)
(guix_register_CPPFLAGS, guix_register_LDFLAGS): Remove.
* tests/guix-register.sh: Remove.
| Ludovic Courtès |
2018-06-14 | database: 'with-database' can now initialize new databases....* nix/libstore/schema.sql: Rename to...
* guix/store/schema.sql: ... this.
* Makefile.am (nobase_dist_guilemodule_DATA): Add it.
* nix/local.mk (%D%/libstore/schema.sql.hh): Adjust accordingly.
* guix/store/database.scm (sql-schema): New variable.
(sqlite-exec, initialize-database, call-with-database): New procedures.
(with-database): Rewrite in terms of 'call-with-database'.
* tests/store-database.scm ("new database"): New test.
* guix/self.scm (compiled-guix)[*core-modules*]: Add 'schema.sql' to
#:extra-files.
| Ludovic Courtès |
2018-06-08 | build: Do not add all of $(BUILT_SOURCES) to $(CLEANFILES)....Reported by Gábor Boskovits <boskovits@gmail.com>.
Fixes <https://bugs.gnu.org/31700>.
* nix/local.mk (CLEANFILES): Add nothing but schema.sql.hh.
| Ludovic Courtès |
2018-05-17 | daemon: Allow building for armhf-linux on aarch64-linux....* nix/libstore/build.cc (canBuildLocally): Allow building armhf-linux
builds on aarch64-linux.
(DerivationGoal::runChild) Throw error if attempting to build for
armhf-linux on an unsupported platform.
* doc/guix.texi (Invoking guix build): Document how to build natively
for armhf-linux on aarch64-linux. Add note that on some aarch64
machines this is unsupported.
| Efraim Flashner |
2018-04-19 | guix-daemon: Disable garbage collection for remote connections....* nix/nix-daemon/nix-daemon.cc (isRemoteConnection): New variable.
(performOp): For wopCollectGarbage, throw an error when isRemoteConnection
is set.
(acceptConnection): Set isRemoteConnection when connection is not AF_UNIX.
* tests/guix-daemon.sh: Add a test for the new behavior.
| Roel Janssen |
2018-03-30 | daemon: Remove unused schema upgrade code....* nix/libstore/local-store.cc (LocalStore): Remove upgrade code.
(LocalStore::queryValidPathsOld, LocalStore::queryPathInfoOld)
(LocalStore::upgradeStore6, makeMutable)
(LocalStore::upgardeStore7): Remove.
* nix/libstore/local-store.hh: Adjust accordingly.
| Ludovic Courtès |
2018-03-30 | daemon: Remove dead code....* nix/libstore/globals.cc (Settings::loadConfFile, Settings::unpack):
Remove.
* nix/libstore/globals.hh: Adjust accordingly.
* nix/libstore/misc.cc (queryMissing): Remove.
* nix/libstore/misc.hh: Adjust accordingly.
* nix/libstore/store-api.cc (followLinksToStore)
(followLinksToStorePath, computeStorePathForHash): Remove.
* nix/libstore/store-api.hh: Adjust accordingly.
| Ludovic Courtès |
2018-01-11 | daemon: Always try to execute the builder regardless of the platform....* nix/libstore/build.cc (runChild): Move platform check after 'execve'
call. Check specifically for ENOEXEC.
| Ludovic Courtès |
2018-01-07 | daemon: Make libbz2 an optional dependency....* config-daemon.ac: Don't bail out when libbz2 is missing. Define
'HAVE_LIBBZ2' Automake conditional.
* nix/libstore/build.cc: Wrap relevant bits in '#if HAVE_BZLIB_H'.
* nix/libstore/globals.cc (Settings::Settings): 'logCompression'
defaults to COMPRESSION_GZIP when HAVE_BZLIB_H is false.
* nix/libstore/globals.hh (CompressionType): Make 'COMPRESSION_BZIP2'
conditional on HAVE_BZLIB_H.
* nix/local.mk (guix_register_LDADD, guix_daemon_LDADD): Add -lbz2 only
when HAVE_LIBBZ2.
* nix/nix-daemon/guix-daemon.cc (parse_opt): Ignore "bzip2" when not
HAVE_BZLIB_H.
| Ludovic Courtès |
2018-01-07 | daemon: Add gzip log compression....* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_LOG_COMPRESSION): New macro.
(options): Mark "disable-log-compression" as hidden and add
"log-compression".
(parse_opt): Handle GUIX_OPT_LOG_COMPRESSION.
* nix/libstore/build.cc (DerivationGoal): Add 'gzLogFile'.
(openLogFile): Initialize it when 'logCompression' is COMPRESSION_GZIP.
(closeLogFile, handleChildOutput): Honor 'gzLogFile'.
* nix/libstore/globals.hh (Settings)[compressLog]: Remove.
[logCompression]: New field.
(CompressionType): New enum.
* nix/libstore/globals.cc (Settings::Settings): Initialize it.
(update): Remove '_get' call for 'compressLog'.
* nix/local.mk (guix_daemon_LDADD, guix_register_LDADD): Add -lz.
* guix/store.scm (log-file): Handle '.gz' log files.
* tests/guix-daemon.sh: Add test with '--log-compression=gzip'.
* doc/guix.texi (Invoking guix-daemon): Adjust accordingly.
* config-daemon.ac: Check for libz and zlib.h.
| Ludovic Courtès |
2017-12-31 | list-runtime-root: Fix off-by-one in 'strip-drop' call....Fixes <https://bugs.gnu.org/29862>.
Reported by Danny Milosavljevic <dannym@scratchpost.org>.
* nix/scripts/list-runtime-roots.in (canonicalize-store-item): Define
'store' with a trailing "/". Have the 'string-prefix?' call match the
'string-drop' call.
| Ludovic Courtès |
2017-11-26 | list-runtime-roots: Ignore ESRCH while reading from /proc....Fixes <https://bugs.gnu.org/29368>.
Reported by Martin Castillo <castilma@uni-bremen.de>.
* nix/scripts/list-runtime-roots.in (referenced-files): Ignore ESRCH.
| Ludovic Courtès |
2017-11-12 | list-runtime-roots: Ignore PIDs we cannot access....This allows running as non-root.
Fixes a regression introduced in b8f59cdc20e9d83ce63523ef917e95fcee07f134.
* nix/scripts/list-runtime-roots.in (referenced-files): Handle EACCES in
addition to ENOENT.
| Ludovic Courtès |
2017-11-12 | list-runtime-roots: Canonicalize store items....Looking at 'addAdditionalRoots' in libstore/gc.cc, it looks like it
should always have been this way. In practice it probably doesn't make
much of a difference.
* nix/scripts/list-runtime-roots.in (canonicalize-store-item): New
procedure.
<top level>: Use it.
| Ludovic Courtès |
2017-11-12 | list-runtime-roots: Do not use 'lsof'....This makes things a bit faster (0.8s instead of 1.4s on my laptop).
* nix/scripts/list-runtime-roots.in (lsof-roots): Remove.
(proc-fd-roots): Return the empty list when 'scandir' returns #f.
(referenced-files): New procedure.
Use it at the top level.
| Ludovic Courtès |
2017-08-18 | nix: Remove unused function....* nix/libutil/util.hh:
* nix/libutil/util.cc (decodeOctalEscaped): Remove unused and buggy function.
| Andy Wingo |
2017-08-18 | Simplify remouting with MS_PRIVATE in sandbox build...also fix race condition if mounts are added after mountinfo is read.
| Jörg Thalheim |
2017-08-07 | daemon: Ensure the child stack is aligned on a 16-byte boundary....* nix/libstore/build.cc (DerivationGoal::startBuilder): When calling 'clone',
ensure that the stack is aligned on a 16-byte boundary.
| Mark H Weaver |
2017-08-05 | daemon: On aarch64, use increments of 16 on the stack....* nix/libstore/build.cc (DerivationGoal::startBuilder): When on aarch64,
when calling clone(), increment the stack by 16.
| Efraim Flashner |
2017-08-05 | Revert "daemon: Ensure proper alignment on the stack."...This reverts commit ab4ccc8fcfaf2215d4b33b1376147e4c2c70426a.
| Mark H Weaver |
2017-07-17 | daemon: Flush the sink upon 'exportPath' errors....Prior to this change, errors such as wrong permissions on
/etc/guix/signing-key.sec would give:
guix-daemon: nix/libutil/serialise.cc:15: virtual nix::BufferedSink::~BufferedSink(): Assertion `!bufPos' failed.
This patch correctly propagates the error to the client and thus changes
that to:
error: build failed: file `/etc/guix/signing-key.sec' should be secret (inaccessible to everybody else)!
* nix/nix-daemon/nix-daemon.cc (performOp): Wrap 'exportPath' call in
'try' block.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
| Jan Nieuwenhuizen |
2017-07-10 | daemon: Allow compilation with GCC 4.9....Reported by Ricardo Wurmus.
* nix/nix-daemon/nix-daemon.cc (acceptConnection): Remove intermediate
'inaddr' variables that relied on implicit casts. This fixes
compilation with GCC 4.9.
| Ludovic Courtès |
2017-06-22 | daemon: Set TCP_NODELAY and TCP_QUICKACK on remote sockets....* nix/nix-daemon/nix-daemon.cc (acceptConnection): Set TCP_NODELAY and
TCP_QUICKACK on REMOTE.
| Ludovic Courtès |
2017-06-22 | daemon: '--listen' can be passed several times, can specify TCP endpoints....* nix/nix-daemon/guix-daemon.cc (DEFAULT_GUIX_PORT): New macro.
(listen_options): New variable.
(parse_opt): Push back '--listen' options to LISTEN_OPTIONS.
(open_unix_domain_socket, open_inet_socket)
(listening_sockets): New functions.
(main): Use it. Pass SOCKETS to 'run'.
* nix/nix-daemon/nix-daemon.cc (matchUser): Remove.
(SD_LISTEN_FDS_START): Remove.
(acceptConnection): New function.
(daemonLoop): Rewrite to take a vector of file descriptors, to select(2)
on them, and to call 'acceptConnection'.
(run): Change to take a vector of file descriptors.
* tests/guix-daemon.sh: Add test.
| Ludovic Courtès |
2017-06-04 | daemon: Add '--timeout' and '--max-silent-time'....* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_TIMEOUT)
(GUIX_OPT_MAX_SILENT_TIME): New macros.
* nix/nix-daemon/guix-daemon.cc (options): Add '--timeout' and
'--max-silent-time'.
(parse_opt): Honor them.
* tests/guix-daemon.sh: Add test.
* doc/guix.texi (Invoking guix-daemon): Document the options.
(Common Build Options): Properly describe default
timeout/max-silent-time value. Add cross-ref to "Invoking
guix-daemon".
| Ludovic Courtès |
2017-05-30 | daemon: Report hash mismatches in a cleaner way....Suggested by Hartmut Goebel.
* nix/libstore/build.cc (DerivationGoal::registerOutputs): Report hash
mismatches on 3 lines for clarity.
(SubstitutionGoal::finished): Likewise.
| Ludovic Courtès |
2017-03-08 | list-runtime-roots: Bufferize the lsof pipe....* nix/scripts/list-runtime-roots.in (lsof-roots): Add 'setvbuf' call for
PIPE.
| Ludovic Courtès |
2017-03-06 | build: Don't embed absolute paths in .service and .conf service files....Otherwise, users will be stuck running an old copy of guix and the guix-daemon
if they copy the service files instead of symlinking them.
* etc/guix-daemon.conf.in, etc/guix-daemon.service.in, etc/guix-publish.conf.in,
etc/guix-publish.service.in: Expand @localstatedir@ instead of @bindir@.
* nix/local.mk (etc/guix-%.service, etc/guix-%.conf): Use @localstatedir@
instead of @bindir@.
| Leo Famulari |
2017-02-20 | daemon: Ensure proper alignment on the stack....* nix/libstore/build.cc (startBuilder): When calling 'clone', increase
the step to 16 and ensure it aligns properly on the stack.
| Efraim Flashner |
2017-02-07 | daemon: Define 'NIX_STORE' before invoking 'guix perform-download'....Reported by rohit yadav <rohityadav@utexas.edu>
at <https://lists.gnu.org/archive/html/guix-devel/2017-02/msg00191.html>.
This fixes a regression whereby 'guix perform-download' would always see
NIX_STORE as unset and thus use "/gnu/store", leading it to miscompute
the hydra.gnu.org content-addressed URLs when the store file name is not
"/gnu/store".
* nix/libstore/builtins.cc (builtinDownload): Add 'setenv' call for
'NIX_STORE'.
| Ludovic Courtès |
2017-01-15 | daemon: Client settings no longer override daemon settings....Fixes <http://bugs.gnu.org/20217>.
* nix/libstore/worker-protocol.hh (PROTOCOL_VERSION): Bump to 0x161.
* nix/nix-daemon/nix-daemon.cc (performOp): "build-max-jobs",
"build-max-silent-time", and "build-cores" are no longer read upfront;
instead, read them from the key/value list at the end.
* nix/nix-daemon/guix-daemon.cc (main): Explicitly set
'settings.maxBuildJobs'.
* guix/store.scm (%protocol-version): Bump to #x161.
(set-build-options): #:max-build-jobs, #:max-silent-time, and
#:build-cores now default to #f. Adjust handshake to new protocol.
* tests/store.scm ("build-cores"): New test.
* tests/guix-daemon.sh: Add test for default "build-cores" value.
| Ludovic Courtès |
2017-01-11 | daemon: Allow check builds of 'builtin:download' derivations....Fixes <http://bugs.gnu.org/25089>.
Reported by Leo Famulari <leo@famulari.name>.
* nix/libstore/build.cc (DerivationGoal::runChild): In the 'isBuiltin'
case, check whether DRV's output is in 'redirectedOutputs', and pass an
'output' argument to the built-in builder.
(DerivationGoal::addHashRewrite): Add 'printMsg' call.
* nix/libstore/builtins.hh (derivationBuilder): Add 'output' parameter.
* nix/libstore/builtins.cc (builtinDownload): Likewise.
Add OUTPUT to ARGV.
* guix/scripts/perform-download.scm (perform-download): Add 'output'
parameter.
(guix-perform-download): Adjust 'match' clauses accordingly.
* tests/derivations.scm ("'download' built-in builder, check mode"): New
test.
| Ludovic Courtès |
2016-12-29 | daemon: Allow fixed-output derivation builds with TMPDIR set....Fixes <http://bugs.gnu.org/25242>.
Reported by Leo Famulari <leo@famulari.name>.
The regression was introduced in 94d92c7796a3dd50c27d532315f7d497ac99f08e.
* nix/libstore/build.cc (DerivationGoal::startBuilder): Set 'useChroot'
as a function 'of isBuiltin(drv)'.
(DerivationGoal::runChild): Use 'useChroot' instead of
'useChroot && !isBuiltin(drv)'.
| Ludovic Courtès |
2016-12-20 | build: Delete all the .service and .conf files upon 'make clean'....* nix/local.mk (CLEANFILES): Define to add $(nodist_systemdservice_DATA)
and $(nodist_upstartjob_DATA).
| Ludovic Courtès |
2016-12-18 | build: Fix .service and .conf targets for VPATH builds....* nix/local.mk (etc/guix-%.service, etc/guix-%.conf): Use "$<", not
"$(srcdir)/$<".
| Ludovic Courtès |
2016-12-18 | build: Add 'guix-publish.*.in' to the distribution....This is a followup to 332d7903f52c2bf3741b04ac2d01cd9018b70800.
* nix/local.mk (EXTRA_DIST): Add 'guix-service.publish.in' and
'guix-publish.conf.in'.
| Ludovic Courtès |
2016-12-09 | daemon: Set ownership of kept build directories to the calling user....Fixes <http://bugs.gnu.org/15890>.
* nix/libstore/globals.hh (Settings) Add clientUid and clientGid.
* nix/nix-daemon/nix-daemon.cc (daemonLoop] Store UID and GID of the
caller in settings.
* nix/libstore/build.cc (_chown): New function.
(DerivationGoal::deleteTmpDir): Use it, change ownership of build
directory if it is kept and the new owner is not root.
| Hartmut Goebel |
2016-12-05 | daemon: Fix invalid Boost format string....* nix/libstore/optimise-store.cc (LocalStore::optimisePath_): Use %3%
instead of %m, the latter being an invalid Boost format specifier.
| Ludovic Courtès |
2016-12-01 | daemon: Buffer data sent to clients by the 'export-path' RPC....Before that we'd have STDERR_WRITE round trips for very small amounts of
data, ranging from a few bytes for the metadata of nars to the size of
one file being exported.
With this change, something like:
guix archive --export /gnu/store/5rrsbaghh5ix1vjcicsl60gsxilhjnf2-coreutils-8.25 | dd of=/dev/null
reports a throughput of 35 MB/s instead of 25 MB/s before.
* nix/nix-daemon/nix-daemon.cc (TunnelSink): Inherit from 'BufferedSink'
rather than 'Sink'. Rename 'operator ()' to 'write'.
(performOp) <wopExportPath>: Add 'sink.flush' call.
| Ludovic Courtès |
2016-11-24 | Add system start-up files for "guix publish"....* .gitignore: add etc/guix-publish.conf and /etc/guix-publish.service.
* etc/guix-publish.conf.in: New file.
* etc/guix-publish.service.in: New file.
* nix/local.mk (etc/guix-%.service, etc/guix-%.conf): Generalized former
build-rules for by using patterns.
(nodist_systemdservice_DATA): Add etc/guix-publish.service, update
comment.
(nodist_upstartjob_DATA): Add etc/guix-publish.conf, update comment.
* doc/guix.texi (Invoking guix publish): Add description for enabling
"guix publish" on host distros using the new files.
| Hartmut Goebel |
2016-11-16 | daemon: Add 'built-in-builders' RPC....* nix/libstore/builtins.cc (builtinBuilderNames): New function.
* nix/libstore/builtins.hh (builtinBuilderNames): New declaration.
* nix/libstore/worker-protocol.hh (PROTOCOL_VERSION): Bump to 0x160.
(WorkerOp)[wopBuiltinBuilders]: New value.
* nix/nix-daemon/nix-daemon.cc (performOp): Handle it.
* guix/store.scm (operation-id)[built-in-builders]: New value.
* guix/store.scm (read-arg): Add 'string-list'.
(built-in-builders): New procedure.
* tests/derivations.scm ("built-in-builders"): New test.
| Ludovic Courtès |
2016-11-16 | daemon: Add "builtin:download" derivation builder....This ensures that 1) the derivation doesn't change when Guix changes;
2) the derivation closure doesn't contain Guix and its dependencies; 3)
we don't have to rely on ugly chroot hacks.
Adapted from Nix commit 0a2bee307b20411f5b0dda0c662b1f9bb9e0e131.
* nix/libstore/build.cc (DerivationGoal::runChild): Add special case for
'isBuiltin(drv)'. Disable chroot when 'isBuiltin(drv)'.
* nix/libstore/builtins.cc, nix/libstore/builtins.hh,
nix/scripts/download.in, guix/scripts/perform-download.scm: New files.
* guix/ui.scm (show-guix-help)[internal?]: Add 'perform-download'.
* nix/local.mk (libstore_a_SOURCES): Add builtins.cc.
(libstore_headers): Add builtins.hh.
(nodist_pkglibexec_SCRIPTS): Add 'scripts/download'.
* config-daemon.ac: Emit 'scripts/download'.
* Makefile.am (MODULES): Add 'guix/scripts/perform-download.scm'.
* tests/derivations.scm ("unknown built-in builder")
("'download' built-in builder")
("'download' built-in builder, invalid hash")
("'download' built-in builder, not found")
("'download' built-in builder, not fixed-output"): New tests.
Co-authored-by: Eelco Dolstra <eelco.dolstra@logicblox.com>
| Ludovic Courtès |
2016-10-28 | daemon: Do not error out when deduplication fails due to ENOSPC....This solves a problem whereby if /gnu/store/.links had enough entries,
ext4's directory index would be full, leading to link(2) returning
ENOSPC.
* nix/libstore/optimise-store.cc (LocalStore::optimisePath_): Upon
ENOSPC from link(2), print a message and return instead of throwing a
'SysError'.
| Ludovic Courtès |
2016-10-28 | daemon: Improve the SQLite wrapper API....In particular, this eliminates a bunch of boilerplate code.
Also integrates these Nix commits:
80da7a6 Probably fix SQLITE_BUSY errors
37a337b throwSQLiteError(): Check for SIGINT so we don't loop forever
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
| Eelco Dolstra |
2016-10-28 | daemon: Factor out SQLite handling....* nix/libstore/local-store.cc: Move SQLite code to...
* nix/libstore/sqlite.cc, nix/libstore/sqlite.hh: ... here. New files.
* nix/local.mk (libstore_a_SOURCES): Add sqlite.cc.
(libstore_headers): Add sqlite.hh.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
| Eelco Dolstra |
2016-10-28 | daemon: Turn retrying SQLite transactions into a higher-order function....* nix/libstore/local-store.cc (retry_sqlite, end_retry_sqlite): Remove.
(retrySQLite): New template.
(LocalStore::registerFailedPath, LocalStore::hasPathFailed)
(LocalStore::queryFailedPaths, LocalStore::clearFailedPaths)
(LocalStore::queryPathInfo, LocalStore::isValidPath_)
(LocalStore::queryValidPaths, LocalStore::queryAllValidPaths)
(LocalStore::queryReferrers, LocalStore::queryValidDerivers)
(LocalStore::queryDerivationOutputs)
(LocalStore::queryDerivationOutputNames)
(LocalStore::queryPathFromHashPart, LocalStore::registerValidPaths)
(LocalStore::invalidatePathChecked): Use it.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
| Eelco Dolstra |
2016-06-26 | daemon: Rename 'NIX_CONF_DIR' to 'GUIX_CONFIGURATION_DIRECTORY'....Partly fixes <http://bugs.gnu.org/22459>.
Reported by Jeff Mickey <j@codemac.net> and David Craven <david@craven.ch>.
* nix/libstore/globals.cc (Settings::processEnvironment()): Change
'NIX_CONF_DIR' to 'GUIX_CONFIGURATION_DIRECTORY'.
* nix/local.mk (libstore_a_CPPFLAGS): Likewise.
* guix/config.scm.in (%config-directory): Likewise.
* build-aux/test-env.in: Likewise.
* gnu/packages/patches/hydra-automake-1.15.patch: Likewise.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
| David Craven |
2016-05-31 | daemon: Substitute queries return immediately when substitutes are disabled....Reported by Federico Beffa <beffa@ieee.org>
at <https://lists.gnu.org/archive/html/guix-devel/2016-05/msg00928.html>.
* nix/libstore/local-store.cc (LocalStore::querySubstitutablePaths)
(LocalStore::querySubstitutablePathInfos): Return when
'settings.useSubstitutes' is false.
* tests/store.scm ("references/substitutes missing reference info"):
Make sure to return #f on failure.
* tests/store.scm ("substitutable-path-info when substitutes are turned off"):
("substitutable-paths when substitutes are turned off"): New tests.
| Ludovic Courtès |
2016-05-31 | daemon: Fix typo....Fixes a regression/typo introduced in
e08380fb6cefd3fd67c3c220a3ddaf385e6413cf.
* nix/libstore/build.cc (DerivationGoal::startBuilder): Canonicalize
"/tmp", not "/tmp/guix-build".
| Ludovic Courtès |
2016-05-31 | daemon: Remove unused XML output code....* nix/local.mk (libutil_a_SOURCES): Remove libutil/xml-writer.cc.
(libutil_headers): Remove libutil/xml-writer.hh.
* nix/libutil/xml-writer.hh, nix/libutil/xml-writer.cc: Remove.
| Ludovic Courtès |