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freebsd-dev/share/man/man7/release.7
Glen Barber 3e64b4c52d Add SRC_UPDATE_SKIP, DOC_UPDATE_SKIP, and PORTS_UPDATE_SKIP 
variables.  These are intended to allow bypassing the
'svn co /usr/{src,doc,ports}' step in the chroot when the
tree exists from external means.

The use case here is that /usr/src, /usr/doc, and /usr/ports
in the chroot exist as result of zfs dataset clones, so it
is possible (and happens quite often) that the included
distributions may not be consistent.  (This is not the case
for -RELEASE builds, but does happen for snapshot builds.)

Tested on:	stable/9@r264319
MFC After:	3 days
Sponsored by:	The FreeBSD Foundation
2014-04-11 13:48:45 +00:00

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.\" Copyright (c) 2002 Murray Stokely <murray@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd April 11, 2014
.Dt RELEASE 7
.Os
.Sh NAME
.Nm release
.Nd "release building infrastructure"
.Sh DESCRIPTION
.Fx
provides a complete build environment suitable for users to make
full releases of the
.Fx
operating system.
All of the tools necessary to build a release are available from the
.Fx
source code repository in
.Pa src/release .
A complete release can actually be built with only a single command,
including the creation of ISO images suitable for burning to CD-ROM,
memory stick images, and an FTP install directory.
This command is aptly named
.Dq Li "make release" .
.Pp
For some users, it may be desirable to provide an absolutely clean
build environment, with no local modifications to the source tree or to
.Xr make.conf 5 ,
and with clean checkouts of specific versions of the doc, src, and ports
trees.
For this purpose, a script
.Pq Pa src/release/release.sh
is provided to automate these checkouts and then execute
.Dq Li "make release"
in a clean
.Xr chroot 8 .
.Pp
Before attempting to build a release, the user is expected to be
familiar with the contents of
.Xr build 7 ,
and should have experience upgrading systems from source.
.Pp
The release build process requires that
.Pa /usr/obj
be populated with the output of
.Dq Li "make buildworld"
and
.Dq Li "make buildkernel" .
This is necessary to provide the object files for the release or, when
using
.Pa release.sh ,
so that the object files for a complete system can be installed into a clean
.Xr chroot 8
environment.
.Pp
If the target release build is for a different architecture or machine type,
the
.Va TARGET
and
.Va TARGET_ARCH
variables must be used.
See the supported
.Fa release.conf
variables for more information.
.Pp
The release procedure on some architectures may also require that the
.Xr md 4
(memory disk) device driver be present in the kernel
.Pq either by being compiled in or available as a module .
.Pp
This document does not cover source code management, quality
assurance, or other aspects of the release engineering process.
.Sh CLEAN RELEASE GENERATION
Official releases of
.Fx
are produced in a totally clean environment to
ensure consistency between the versions of the src, ports, and doc trees
and to avoid contamination from the host system
.Po such as local patches, changes
to
.Xr make.conf 5 ,
etc.
.Pc .
This is accomplished using the wrapper script
.Pa src/release/release.sh .
.Pp
.Ic release.sh
.Op Fl c Ar release.conf
.Pp
.Ic release.sh
checks out the
.Li src/ ,
.Li ports/ ,
and
.Li doc/
trees to
.Va CHROOTDIR ,
then calls
.Dq Li "make buildworld"
and
.Dq Li "make installworld"
to generate a
.Xr chroot 8
environment.
Next,
.Dq Li "make release"
is run within the
.Xr chroot 8
environment and places the result in
.Pa $CHROOTDIR/R .
.Pp
The optional
.Fa release.conf
configuration file supports the following variables:
.Bl -tag -width Ev
.It Va CHROOTDIR
The directory within which the release will be built.
.It Va CHROOT_MAKEENV
Additional
.Xr make 1
arguments to pass through, which directly affect the
tuning of the build chroot.
.It Va SVNROOT
The
.Xr svn 1
host used to check out the various trees.
Defaults to
.Pa svn://svn.FreeeBSD.org .
.It Va SRCBRANCH
The
.Li src/
branch to use.
Defaults to
.Va head/@rHEAD .
.It Va DOCBRANCH
The
.Li doc/
branch to use.
Defaults to
.Va head/@rHEAD .
.It Va PORTBRANCH
The
.Li ports/
branch to use.
Defaults to
.Va head/@rHEAD .
.It Va TARGET
The target machine type for cross-building a release.
.It Va TARGET_ARCH
The target machine architecture for cross-building a release.
.Pp
For the supported list of
.Va TARGET
and
.Va TARGET_ARCH
combinations, consult the output of
.Dq make targets
as documented in
.Xr build 7 .
.It Va KERNEL
The target kernel configuration to use.
Defaults to
.Va GENERIC .
Multiple
.Va KERNEL
entries may be specified.
.It Va MAKE_CONF
The
.Xr make.conf 5
to use for the release build.
Defaults to
.Fa /dev/null
to prevent polluting the release with local system changes.
.It Va SRC_CONF
The
.Xr src.conf 5
to use for the release build.
Defaults to
.Fa /dev/null
to prevent polluting the release with local system changes.
.It Va MAKE_FLAGS
Additional flags to pass to
.Xr make 1 .
.It Va WORLD_FLAGS
Additional flags to pass to
.Xr make 1
during the
.Dq buildworld
phase.
Defaults to setting the number of
.Xr make 1
jobs
.Pq Ar -j
to the number of CPUs available on a SMP-capable system.
.It Va KERNEL_FLAGS
Additional flags to pass to
.Xr make 1
during the
.Dq buildkernel
phase.
Defaults to setting the number of
.Xr make 1
jobs
.Pq Ar -j
to half the number of CPUs available on a SMP-capable system.
.It Va NODOC
Set to a non-empty value to skip the
.Li doc/
tree checkout.
When set,
.Va NODOC
will prevent the
.Fa doc.txz
distribution package from being created.
.It Va NOPORTS
Set to a non-empty value to skip the
.Li ports/
tree checkout.
When set,
.Va NOPORTS
will prevent the
.Fa ports.txz
distribution package from being created.
Setting this also sets
.Va NODOC .
.It Va WITH_DVD
Set to a non-empty value to include the
.Cm dvdrom
target.
.It Va WITH_COMPRESSED_IMAGES
Set to a non-empty value to compress the release images with
.Xr xz 1 .
The original
.Pq uncompressed
images are not removed.
.It Va VCSCMD
The command run to obtain the source trees.
Defaults to
.Qq Cm svn checkout .
.It Va CHROOTBUILD_SKIP
If defined, the
.Li buildworld ,
.Li installworld ,
and
.Li distribution
stages of the
.Xr chroot 8
build environment setup are skipped.
This is intended solely for cases where the
.Xr chroot 8
userland are provided by alternate means.
.It Va SRC_UPDATE_SKIP
Set to a non-empty value to prevent checkout or update of
.Fa /usr/src
within the
.Xr chroot 8 .
This is intended for use only when
.Fa /usr/src
is expected to exist by alternative means.
.It Va DOC_UPDATE_SKIP
Set to a non-empty value to prevent checkout or update of
.Fa /usr/doc
within the
.Xr chroot 8 .
This is intended for use only when
.Fa /usr/doc
is expected to exist by alternative means.
.It Va PORTS_UPDATE_SKIP
Set to a non-empty value to prevent checkout or update of
.Fa /usr/ports
within the
.Xr chroot 8 .
This is intended for use only when
.Fa /usr/ports
is expected to exist by alternative means.
.El
.Sh EMBEDDED BUILDS
The following
.Fa release.conf
variables are relevant only to release builds for embedded systems:
.Bl -tag -width Ev
.It Va EMBEDDEDBUILD
Set to a non-null value to enable functionality for embedded device
release builds.
.Pq This option is considered highly experimental.
.Pp
When set,
.Va WITH_DVD
is unset, and
.Va NODOC
is defined.
Additionally,
.Va XDEV
and
.Va XDEV_ARCH
must also be defined.
When the build environment is created,
.Fa release.sh
runs a separate build script located in an architecture-specific
directory in
.Pa src/release/${XDEV}/ .
.It Va EMBEDDEDPORTS
Set to the list of any ports that are required for the target device
in the format of
.Fa category/port .
The
.Fa devel/subversion
port is built by default.
.It Va CROCHETSRC
Set to the source URL for the Crochet build tool.
.It Va CROCHETBRANCH
Set to the subversion branch from
.Va ${CROCHETSRC}
to use.
Defaults to
.Pa trunk .
.It Va UBOOTSRC
Set to the source URL of u-boot, if required.
.It Va UBOOTBRANCH
Set to the subversion branch from
.Va ${UBOOTSRC}
to use.
Defaults to
.Pa trunk .
.It Va UBOOTDIR
Set to the target directory within
.Va ${CHROOTDIR}
to check out
.Va ${UBOOTSRC}/${UBOOTBRANCH} .
.El
.Sh MAKEFILE TARGETS
The release makefile
.Pq Pa src/release/Makefile
is fairly abstruse.
Most developers will only be concerned with the
.Cm release
and
.Cm install
targets.
.\" XXX: Some sort of introduction to this list? All the others have one.
.Bl -tag -width ".Cm packagesystem"
.It Cm release
Meta-target to build all release media and distributions applicable to this
platform.
.It Cm install
Copy all produced release media to
.Pa ${DESTDIR} .
.It Cm cdrom
Builds installation CD-ROM images.
This may require the
.Xr md 4
(memory disk) device driver be present in the kernel
(either by being compiled in or available as a module).
This target produces files called
.Pa disc1.iso
and
.Pa bootonly.iso
as its output.
.It Cm dvdrom
Builds installation DVD-ROM images.
This may require the
.Xr md 4
(memory disk) device driver be present in the kernel
(either by being compiled in or available as a module).
This target produces the
.Pa dvd1.iso
file as its output.
.It Cm memstick
Builds an installation memory stick image named
.Pa memstick.img .
Not applicable on all platforms.
Requires that the
.Xr md 4
.Pq memory disk
device driver be present in the kernel
.Pq either by being compiled in or available as a module .
.It Cm mini-memstick
Similar to
.Cm memstick ,
with the exception that the installation distribution sets
are not included.
.It Cm ftp
Creates a directory named
.Pa ftp
containing the distribution files used in network installations
and suitable for upload to an FTP mirror.
.El
.Pp
Major subtargets called by targets above:
.Bl -tag -width ".Cm packagesystem"
.It Cm packagesystem
Generates all the distribution archives
.Pq base, kernel, ports, doc
applicable on this platform.
.It Cm system
Builds a bootable installation system containing all the distribution files
packaged by the
.Cm packagesystem
target, and suitable for imaging by the
.Cm cdrom ,
.Cm dvdrom
and
.Cm memstick
targets.
.It Cm reldoc
Builds the release documentation.
This includes the release notes,
hardware guide, and installation instructions.
Other documentation, such as the Handbook,
is built during the
.Cm base.txz
target invoked by
.Cm packagesystem .
.El
.Sh ENVIRONMENT
Optional variables:
.Bl -tag -width ".Ev TARGET_ARCH"
.It Ev OSRELEASE
Optional base name for generated media images
.Pq e.g., FreeBSD-9.0-RC2-amd64 .
Defaults to the output of
.Ic `uname -s`-`uname -r`-`uname -p`
within the chroot.
.It Ev WORLDDIR
Location of a directory containing the src tree.
By default, the directory
above the one containing the makefile
.Pq Pa src .
.It Ev PORTSDIR
Location of a directory containing the ports tree.
By default,
.Pa /usr/ports .
If it is unset or cannot be found, ports will not be included in the release.
.It Ev DOCDIR
Location of a directory containing the doc tree.
By default,
.Pa /usr/doc .
If it is unset or cannot be found, most documentation will not be included in
the release; see
.Ev NODOC
below.
.It Ev NOPORTS
If defined, the Ports Collection will be omitted from the release.
.It Ev NOSRC
If set, do not include system source code in the release.
.It Ev NODOC
If defined, the XML-based documentation from the
.Fx
Documentation Project will not be built.
However, the
.Dq doc
distribution will still be created with the minimal documentation set
provided in
.Pa src/share/doc .
.It Ev TARGET
The target hardware platform.
This is analogous to the
.Dq Nm uname Fl m
output.
This is necessary to cross-build some target architectures.
For example, cross-building for PC98 machines requires
.Ev TARGET_ARCH Ns = Ns Li i386
and
.Ev TARGET Ns = Ns Li pc98 .
If not set,
.Ev TARGET
defaults to the current hardware platform.
.It Ev TARGET_ARCH
The target machine processor architecture.
This is analogous to the
.Dq Nm uname Fl p
output.
Set this to cross-build for a different architecture.
If not set,
.Ev TARGET_ARCH
defaults to the current machine architecture, unless
.Ev TARGET
is also set, in which case it defaults to the appropriate
value for that platform.
Typically, one only needs to set
.Ev TARGET .
.El
.Sh FILES
.Bl -tag -compact -width Pa
.It Pa /usr/doc/Makefile
.It Pa /usr/doc/share/mk/doc.project.mk
.It Pa /usr/ports/Mk/bsd.port.mk
.It Pa /usr/ports/Mk/bsd.sites.mk
.It Pa /usr/share/examples/etc/make.conf
.It Pa /usr/src/Makefile
.It Pa /usr/src/Makefile.inc1
.It Pa /usr/src/release/Makefile
.It Pa /usr/src/release/release.sh
.It Pa /usr/src/release/release.conf.sample
.El
.Sh EXAMPLES
The following sequence of commands can be used to build a
.Dq "-CURRENT snapshot":
.Bd -literal -offset indent
cd /usr
svn co svn://svn.freebsd.org/base/head src
cd src
make buildworld buildkernel
cd release
make release
make install DESTDIR=/var/freebsd-snapshot
.Ed
.Pp
After running these commands, all produced distribution files (tarballs
for FTP, CD-ROM images, etc.) are available in the
.Pa /var/freebsd-snapshot
directory.
.Pp
The following sequence of commands can be used to build a
.Dq "-CURRENT snapshot"
in a clean environment, including ports and documentation:
.Bd -literal -offset indent
cd /usr/src/release
sh release.sh
.Ed
.Pp
Optionally, a configuration file can be used customize the release build,
such as the subversion revision to use, the branch of the subversion tree for
.Li src/ ,
.Li ports/ ,
and
.Li doc/ .
.Bd -literal -offset indent
cd /usr/src/release
sh release.sh -c $HOME/release.conf
.Ed
.Pp
After running these commands, all prepared release files are available in the
.Pa /scratch
directory.
The target directory can be changed by specifying the
.Va CHROOTDIR
variable in
.Li release.conf .
.Sh SEE ALSO
.Xr cc 1 ,
.Xr install 1 ,
.Xr make 1 ,
.Xr svn 1 Pq Pa ports/devel/subversion ,
.Xr uname 1 ,
.Xr md 4 ,
.Xr make.conf 5 ,
.Xr build 7 ,
.Xr ports 7 ,
.Xr chroot 8 ,
.Xr mtree 8 ,
.Xr sysctl 8
.Rs
.%T "FreeBSD Release Engineering"
.%U http://www.FreeBSD.org/doc/en_US.ISO8859-1/articles/releng/
.Re
.Rs
.%T "FreeBSD Release Engineering of Third Party Packages"
.%U http://www.FreeBSD.org/doc/en_US.ISO8859-1/articles/releng-packages/
.Re
.Rs
.%T "FreeBSD Developers' Handbook"
.%U http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/developers-handbook/
.Re
.Sh HISTORY
.Fx
1.x
used a manual checklist, compiled by
.An Rod Grimes ,
to produce a release.
Apart from being incomplete, the list put a lot of specific demands on
available file systems and was quite torturous to execute.
.Pp
As part of the
.Fx 2.0
release engineering effort, significant
effort was spent getting
.Pa src/release/Makefile
into a shape where it could at least automate most of the tediousness
of building a release in a sterile environment.
.Pp
For the
.Fx 9.0
release,
.Pa src/release/Makefile
was overhauled and the wrapper script
.Pa src/release/generate-release.sh
introduced to support the introduction of a new installer.
.Pp
For the
.Fx 9.2
release,
.Pa src/release/release.sh
was introduced to support per-build configuration files.
.Pa src/release/release.sh
is heavily based on the
.Pa src/release/generate-release.sh
script.
.Pp
At near 1000 revisions spread over multiple branches, the
.Xr svn 1
log of
.Pa src/release/Makefile
contains a vivid historical record of some
of the hardships release engineers go through.
.Sh AUTHORS
.Pa src/release/Makefile
was originally written by
.An -nosplit
.An Rod Grimes ,
.An Jordan Hubbard ,
and
.An Poul-Henning Kamp .
.Pp
This manual page was originally written by
.An Murray Stokely Aq murray@FreeBSD.org .
.Pp
It was updated by
.An Nathan Whitehorn Aq nwhitehorn@FreeBSD.org
to include the
.Fa generate-release.sh
script used for the
.Fx 9.0
release cycle.
.Pp
It was later updated by
.An Glen Barber Aq gjb@FreeBSD.org
to include the
.Fa release.sh
script used for the
.Fx 9.2
release cycle.
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