* doc/guix.texi (cargo-build-system): Fix install phase description.
(julia-build-system): Fix typo and add information from check.
(pulseaudio-configuration): Remove duplicated words.
(knot-acl-configuration)[id]: Fix typo.
(mpd-output)[extra-options]: Likewise.
(libvirt-configuration) [listen-tls?]: Add missing subject.
[listen-tcp?]: Add missing subject and period.
[tls-port, tcp-port, log-filters]: Add missing period.
(hurd-vm-configuration)[netoptions]: Fix typo in example.
(ganeti-watcher-service-type): Fix typo.
(grub-theme)[gfxmode]: Remove see before @pxref.

* doc/guix-cookbook.texi (A Scheme Crash Course): Clarify what keywords
are.

* doc/guix.texi (Build Utilities): Fix typos.  Provide the correct
syntax for 'substitute*'.  Add a 'modify-phases' example.

* doc/guix.texi (Build Utilities): New section.
(Defining Packages): Refer to it.
(Build Systems): Likewise.
* doc/guix-cookbook.texi (Extended example): Likewise.

* doc/guix-cookbook.texi (Utility functions): Use @code instead of @asis.

* doc/guix-cookbook.texi (Extended example)
(Customizing the Kernel, Running Guix on a Linode Server): Use #true and #false.

* doc/guix-cookbook.texi (Extended example): Use @var for meta-syntactic
variables in 'modify-phases' description.

* doc/guix-cookbook.texi (Extended example): Fix 'let' form in example.

* doc/guix.texi (Guix Build Coordinator): Fix typo.

* gnu/services/web.scm (<nginx-configuration>)
[lua-package-path, lua-package-cpath]: New record types.
* gnu/services/web.scm (default-nginx-config): Use them.
* doc/guix.texi (Web Services): Document this.
* doc/guix-cookbook.texi (System Configuration): Document this.

* doc/guix-cookbook.texi (A Scheme Crash Course): Mention "#true" and
"#false".
(Extended example): Likewise.

* doc/guix.texi (GNU Distribution): Mention "i586-gnu".

Commit 4b5a6fbc turned "Transparent
Emulation with QEMU" into a node, but that was an orphan node, with no
up/next/previous links.

* doc/guix.texi (Virtualization Services): Capitalize subsection title.
(Transparent Emulation with QEMU): Remove "@node" and add "@anchor".
(Daemon Offload Setup): Adjust cross-reference accordingly.

* guix/scripts/build.scm (package-dependents/spec)
(package-toolchain-rewriting, transform-package-toolchain): New procedures.
(%transformations): Add it.
(%transformation-options, show-transformation-options-help): Add
'--with-c-toolchain'.
* tests/scripts-build.scm (depends-on-toolchain?): New procedure.
("options->transformation, with-c-toolchain")
("options->transformation, with-c-toolchain twice")
New test.
("options->transformation, with-c-toolchain, no effect"): New tests.
* doc/guix.texi (Package Transformation Options): Document it.

* guix/build-system.scm (build-system-with-c-toolchain): New procedure.
* guix/packages.scm (package-with-c-toolchain): New procedure.
* tests/packages.scm ("package-with-c-toolchain"): New test.
* doc/guix.texi (package Reference): Document 'package-with-c-toolchain'.
(Build Systems): Mention it.

Fixes <https://issues.guix.gnu.org/40867

>.

* doc/guix.texi (Common Build Options): Suggest using '--keep-failed' to keep
differing build results in the store rather than 'guix archive'.

Reported-by: Jonathan Brielmaier <jonathan.brielmaier@web.de>

* doc/guix.texi (Networking Services): Document configuration option to
specify the openssh package for the openssh-service-type.

Fixes <https://issues.guix.gnu.org/43773>.

The computed normalized load was previously obtained by dividing the load
average as found in /proc/loadavg by the number of parallel builds defined for
a build machine.

This normalized load didn't allow to compare machines with different number of
cores, as the load average reported by /proc/loadavg can be as high as the
number of cores; thus comparing that value to a fixed threshold of 2.0 would
mean machines with multiple cores were more likely to be flagged as overloaded
compared to single core machines.

This can be fixed by normalizing using the available number of cores instead
of the number of parallel jobs.

* guix/scripts/offload.scm (<build-machine>)[overload-threshold]: New field.
(node-load): Modify to return a normalized load value between 0 and 1, taking
into account the number of cores available.
(normalized-load): Remove procedure.
(report-load): New procedure.
(choose-build-machine): Adjust to use the modified 'node-load' and the new
'report-load' and 'build-machine-overload-threshold' procedures.
(check-machine-status): Adjust.
* doc/guix.texi (Daemon Offload Setup): Document the offload scheduler and the
new 'overload-threshold' field.

Suggested by Emmanuel Agullo.

* doc/contributing.texi (Running Guix Before It Is Installed): Move the
"./pre-inst-env guix-daemon" snippet at the bottom.  Make it clear that
it's necessary only when hacking on guix-daemon or when guix-daemon is
not already running.

Suggested by Emmanuel Agullo.

* doc/contributing.texi (Building from Git): Mention that running "make
install" is unnecessary.

* doc/guix.texi (Using the Configuration System): In example, set
'substitute-urls' rather than 'use-substitutes?', and set 'auto-login'
for 'mingetty-configuration'.
(Service Types and Services): In example, show 'extra-options' rather
than 'use-substitutes?'.

* gnu/services/dns.scm (<dnsmasq-configuration>): Add TFTP configuration
fields.
(dnsmasq-shepherd-service): Use them.
* doc/guix.texi (DNS Services): Document them.

* gnu/services/guix.scm (<guix-build-coordinator-queue-builds-configuration>):
New record type.
(guix-build-coordinator-queue-builds-configuration,
guix-build-coordinator-queue-builds-configuration?,
guix-build-coordinator-queue-builds-configuration-package,
guix-build-coordinator-queue-builds-configuration-user,
guix-build-coordinator-queue-builds-coordinator,
guix-build-coordinator-queue-builds-configuration-systems,
guix-build-coordinator-queue-builds-configuration-system-and-targets,
guix-build-coordinator-queue-builds-configuration-guix-data-service,
guix-build-coordinator-queue-builds-configuration-processed-commits-file,
guix-build-coordinator-queue-builds-shepherd-services,
guix-build-coordinator-queue-builds-activation,
guix-build-coordinator-queue-builds-account): New procedures.
(guix-build-coordinator-queue-builds-service-type): New variable.
* doc/guix.texi (Guix Services): Document it.

* gnu/services/guix.scm (<guix-build-coordinator-agent-configuration>): New
record type.
(guix-build-coordinator-agent-configuration,
guix-build-coordinator-agent-configuration?,
guix-build-coordinator-agent-configuration-package,
guix-build-coordinator-agent-configuration-user,
guix-build-coordinator-agent-configuration-coordinator,
guix-build-coordinator-agent-configuration-uuid),
guix-build-coordinator-agent-configuration-password,
guix-build-coordinator-agent-configuration-password-file,
guix-build-coordinator-agent-configuration-systems,
guix-build-coordinator-agent-configuration-max-parallel-builds,
guix-build-coordinator-agent-configuration-derivation-substitute-urls,
guix-build-coordinator-agent-configuration-non-derivation-substitute-urls,
guix-build-coordinator-agent-shepherd-services,
guix-build-coordinator-agent-activation,
guix-build-coordinator-agent-account): New procedures.
(guix-build-coordinator-agent-service-type): New variable.
* doc/guix.texi (Guix Services): Document it.

* gnu/services/guix.scm (<guix-build-coordinator-configuration>): New record
type.
(guix-build-coordinator-configuration, guix-build-coordinator-configuration?,
guix-build-coordinator-configuration-package,
guix-build-coordinator-configuration-user,
guix-build-coordinator-configuration-group,
guix-build-coordinator-configuration-datastore-uri-string,
guix-build-coordinator-configuration-agent-communication-uri-string,
guix-build-coordinator-configuration-client-communication-uri-string,
guix-build-coordinator-configuration-allocation-strategy,
guix-build-coordinator-configuration-hooks,
guix-build-coordinator-configuration-guile,
make-guix-build-coordinator-start-script,
guix-build-coordinator-shepherd-services, guix-build-coordinator-activation,
guix-build-coordinator-account): New procedures.
(guix-build-coordinator-service-type): New variable.
* gnu/tests/guix.scm (%test-guix-build-coordinator): New variable.
* doc/guix.texi (Guix Services): Document it.

* guix/scripts/package.scm (transaction-upgrade-entry)[upgrade]: Add
'transform' parameter.  Pass PKG through it.  Use
'manifest-entry-with-transformations'.
Call 'options->transformation' to get the transformation procedure.
* tests/guix-package.sh: Add 'guix package -u' test.
* tests/packages.scm ("transaction-upgrade-entry, transformation options preserved"):
New test.
* doc/guix.texi (Invoking guix package): Mention that transformations
are preserved across upgrades.
(Package Transformation Options): Likewise.

* doc/guix.texi (Package Transformation Options): Explain.

* gnu/services/ssh.scm:
(<webssh-configuration>): New record type.
(%webssh-configuration-nginx, webssh-service-type): New variables.
(webssh-account, webssh-activation, webssh-shepherd-service): New procedures.
* doc/guix.texi: Document this.

* guix/scripts/system.scm (list-image-types): New procedure,
(%options): add "image-type" and "list-image-types" options, remove
"file-system-type" option,
(show-help): adapt accordingly,
(%default-options): also adapt, and set the default "image-type" to "raw",
(perform-action): add image-type argument and remove file-system-type argument,
(process-action):  adapt perform-action call,
(system-derivation-for-action): remove base-image
argument, add image-type argument, and use it to create the image passed to
"system-image".
* tests/guix-system.sh: Adapt accordingly and add a test for
"--list-image-types" command.
* doc/guix.texi (Building the Installation Image,
Invoking guix system): Adapt accordingly.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

* gnu/services/virtualization.scm (initialize-hurd-vm-substitutes)
(hurd-vm-activation): New procedures.
(hurd-vm-service-type)[extensions]: Add ACTIVATION-SERVICE-TYPE
extension.
* doc/guix.texi (Transparent Emulation with QEMU): Mention GNU/Hurd.
(The Hurd in a Virtual Machine): Explain which files are automatically
installed and mention offloading.

* gnu/services/base.scm (guix-activation): Invoke "guix archive
--generate-key".
* doc/guix.texi (Invoking guix archive)
(Invoking guix deploy): Mention that 'guix-service-type' takes care of
generating the key pair.

* gnu/services/desktop.scm <elogind-configuration>: Add an
handle-lid-switch-external-power field, mapping to the
HandleLidSwitchExternalPower logind.conf setting.
* doc/guix.texi (Desktop Services): ‘Document’ it.

* doc/guix.texi (User Accounts): Add example with custom shell and
custom home directory.  Add examples of shell gexps.

* doc/guix.texi (Channels): Move @cindex at the beginning of the node
they refer to from the end of the previous node.

* doc/guix.texi (Primary URL): Move after "Specifying Channel
Authorizations" since the audience is channel authors who've already
taken care of authorizations.

The sectioning becomes:

1.  Specifying Additional Channels     (was 3.)
2.  Using a Custom Guix Channel        (was 2.)
3.  Replicating Guix                   (was 9.)
4.  Channel Authentication             (was 1.)
5.  Primary URL                        (was 7.)
6.  Creating a Channel                 (reworded)
7.  Package Modules in a Sub-directory (was 5.)
8.  Declaring Channel Dependencies     (was 4.)
9.  Specifying Channel Authorizations  (was 6.)
10. Writing Channel News               (was 8.)

* doc/guix.texi (Channels): Move section to chapter.
Reorder the chapter.
Minor tweaks to keep uniformity.
Update the master menu.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* doc/guix.texi: Update the master menu.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* guix/packages.scm (package-input-rewriting): Add #:deep? and pass it
to 'package-mapping'.
[replacement-property]: New variable.
[rewrite]: Check it.
[cut?]: New procedure.
* tests/packages.scm ("package-input-rewriting"): Pass #:deep? #f and
ensure implicit inputs were not rewritten.  Avoid 'eq?' comparisons.
("package-input-rewriting, deep"): New test.
* gnu/packages/guile.scm (package-for-guile-2.0, package-for-guile-3.0):
Pass #:deep? #f.

With this change, '--with-input', '--with-graft', etc. also apply to
implicit dependencies.  Thus, it's now possible to do:

  guix build python-itsdangerous --with-input=python-wrapper=python@2

or:

  guix build hello --with-graft=glibc=glibc@2.29

Additionally, before, implicit inputs were not rewritten, which could
lead to duplicates in the output of 'bag-transitive-inputs' (packages
that are not 'eq?' but lead to the same derivation).  This in turn would
lead to unnecessary rebuilds when using '--with-input' & co.  This
change fixes it by ensuring even implicit inputs are rewritten.

Fixes <https://bugs.gnu.org/42156>.

* guix/packages.scm (package-input-rewriting/spec): Add #:deep?
defaulting to #true, and pass it to 'package-mapping'.
[replacement-property]: New variable.
[rewrite]: Check that property and set it on the result of PROC.
[cut?]: New procedure.
* tests/packages.scm ("package-input-rewriting/spec"): Ensure implicit
inputs were unchanged.
("package-input-rewriting/spec, partial match"): Pass #:deep? #f.
("package-input-rewriting/spec, deep")
("package-input-rewriting/spec, no duplicates"): New tests.
(package/inherit): Move before use.
* tests/guix-build.sh: Add tests.
* tests/scripts-build.scm ("options->transformation, with-graft"):
Compare dependencies by package name or derivation file name.
* doc/guix.texi (Defining Packages): Adjust accordingly.

* guix/packages.scm (build-system-with-package-mapping): New procedure.
(package-mapping): Add #:deep? and honor it.
* tests/packages.scm ("package-mapping"): Compare the direct inputs of
the bag of P0 and that of P1.
("package-mapping, deep"): New test.