.\"	$OpenBSD: pkg_create.1,v 1.3 1996/12/29 12:18:29 graichen Exp $	
.\"
.\" FreeBSD install - a package for the installation and maintainance
.\" of non-core utilities.
.\"
.\" 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.
.\"
.\" Jordan K. Hubbard
.\"
.\"
.\"     @(#)pkg_create.1
.\"
.\" hacked up by John Kohl for NetBSD--fixed a few bugs, extended keywords,
.\" added dependency tracking, etc.
.\"
.\" [jkh] Took John's changes back and made some additional extensions for
.\" better integration with FreeBSD's new ports collection.
.\"
.Dd April 21, 1995
.Dt pkg_create 1
.Os
.Sh NAME
.Nm pkg_create
.Nd a utility for creating software package distributions.
.Sh SYNOPSIS
.Nm
.Op Fl YNOhv
.Op Fl P Ar pkgs
.Op Fl p Ar prefix
.Op Fl f Ar contents
.Op Fl i Ar iscript
.Op Fl k Ar dscript
.Op Fl r Ar rscript
.Op Fl t Ar template
.Op Fl X Ar excludefile
.Op Fl D Ar displayfile
.Op Fl m Ar mtreefile
.Fl d Ar description
.Fl f Ar packlist
.Ar pkg-name
.Sh DESCRIPTION
The
.Nm
command is used to create packages that will subsequently be fed to
one of the package extraction/info utilities.  The input description
and command line arguments for the creation of a package are not
really meant to be human-generated, though it is easy enough to
do so.  It is more expected that you will use a front-end tool for
the job rather than muddling through it yourself. Nonetheless, a short
description of the input syntax is included in this document.
.Sh OPTIONS
The following command line options are supported.
.Bl -tag -width indent
.It Fl f Ar packinglist
Fetch ``packing list'' for package from the file
.Ar packinglist
or
.Cm stdin
if
.Ar packinglist
is a
.Cm -
(dash).
.Em "Mandatory."
.It Fl c Ar [-]desc
Fetch package ``one line description'' from file
.Ar desc
or, if preceded by
.Cm - ,
the argument itself.  This string should also
give some idea of which version of the product (if any) the package
represents.
.Em "Mandatory."
.It Fl d Ar [-]desc
Fetch long description for package from file
.Ar desc
or, if preceded by
.Cm - ,
the argument itself.
.Em "Mandatory."
.It Fl Y
Assume a default answer of `Yes' for any questions asked.
.Em "Optional."
.It Fl N
Assume a default answer of `No' for any questions asked.
.It Fl O
Go into a `packing list Only' mode.  This is a custom hack for the
.Em "FreeBSD Ports Collection"
and is used to do `fake pkg_add' operations when a port is installed.
In such cases, it is necessary to know what the final, adjusted packing
list will look like.
.Em "Optional."
.It Fl v
Turns on verbose output.
.Em "Optional."
.It Fl h
Forces tar to follow symbolic links, so that the files they point to
are dumped, rather than the links themselves.
.It Fl i Ar iscript
Sets
.Ar iscript
to be the install procedure for the package.  This can be any
executable program (or shell script).  It will be invoked automatically
when the package is later installed.
.Em "Optional."
.It Fl P Ar pkgs
Sets the initial package dependency list to
.Ar pkgs.
This is assumed to be a whitespace separated list of package names
and is meant as a convenient shorthand for specifying multiple
.Cm @pkgdep
directives in the packing list (see PACKING LIST DETAILS section below).
.Em "Optional."
.It Fl p Ar prefix
Sets
.Ar prefix
as the initial directory ``base'' to start from in selecting files for
the package.
.Em "Optional."
.It Fl k Ar dscript
Sets
.Ar dscript
to be the de-install procedure for the package.  This can be any
executable program (or shell script).  It will be invoked automatically
when the package is later (if ever) de-installed.
.Em "Optional."
.It Fl r Ar rscript
Sets
.Ar rscript
to be the ``requirements'' procedure for the package.  This can be any
executable program (or shell script).  It will be invoked automatically
at installation/deinstallation time to determine whether or not
installation/deinstallation should proceed.
.Em "Optional."
.It Fl t Ar template
Use
.Ar template
as the input to 
.Xr mktemp 3 .
By default, this is the string
.Pa /tmp/instmp.XXXXXX ,
but it may be necessary to override it in the situation where
space in your
.Pa /tmp
directory is limited.  Be sure to leave some number of `X' characters
for
.Xr mktemp 3
 to fill in with a unique ID.
.Em "Optional."
.It Fl X Ar excludefile
Pass
.Ar excludefile
as a
.Fl exclude-from
argument to
.Cm tar
when creating final package.  See
.Cm tar
man page (or run
.Cm tar
with
.Fl -help
flag) for further information on using this flag.
.It Fl D Ar displayfile
Display the file (using
.Xr more 1 ) 
after installing the package.  Useful for things like
legal notices on almost-free software, etc.
.It Fl m Ar mtreefile
Run
.Xr mtree 8
with input from mtreefile before the package is installed.  
Mtree is invoked as
.Cm mtree
.Fl u 
.Fl f 
.Ar mtreefile
.Fl d
.Fl e 
.Fl p 
.Pa prefix ,
where
.Pa prefix
is the name of the first directory named by a
.Cm @cwd
directive.
.El
.Pp
.Sh PACKING LIST DETAILS
The ``packing list'' format (see
.Fl f )
is fairly simple, being
nothing more than a single column of filenames to include in the
package.  However, since absolute pathnames are generally a bad idea
for a package that could be installed potentially anywhere, there is
another method of specifying where things are supposed to go
and, optionally, what ownership and mode information they should be
installed with.  This is done by imbeding specialized command sequences
in the packing list. Briefly described, these sequences are:
.Bl -tag -width indent -compact
.It Cm @cwd Ar directory
Sets the internal directory pointer to point to
.Ar directory .
All subsequent filenames will be assumed relative to this directory.
Note:
.Cm @cd
is also an alias for this command.
.It Cm @srcdir Ar directory
Sets the internal directory pointer for _creation only_ to
.Ar directory .
That is to say that it overrides
.Cm @cwd
for package creation but not extraction.
.It Cm @exec Ar command
Execute
.Ar command
as part of the unpacking process.  If
.Ar command
contains a any of the following sequences somewhere in it, they will
be expanded inline.  For the following examples, assume that
.Cm @cwd
is set to
.Pa /usr/local
and the last extracted file was
.Pa bin/emacs .
.Bl -tag -width indent -compact
.It Cm "%F"
Expands to the last filename extracted (as specified), in the example case
.Pa bin/emacs
.It Cm "%D"
Expands to the current directory prefix, as set with
.Cm @cwd ,
in the example case
.Pa /usr/local .
.It Cm "%B"
Expands to the ``basename'' of the fully qualified filename, that
is the current directory prefix, plus the last filespec, minus
the trailing filename.  In the example case, that would be
.Pa /usr/local/bin .
.It Cm "%f"
Expands to the ``filename'' part of the fully qualified name, or
the converse of
.Cm %B ,
being in the example case,
.Pa emacs .
.El
.It Cm @unexec Ar command
Execute
.Ar command
as part of the deinstallation process.  Expansion of special
.Cm %
sequences is the same as for
.Cm @exec .
This command is not executed during the package add, as
.Cm @exec
is, but rather when the package is deleted.  This is useful
for deleting links and other ancillary files that were created
as a result of adding the package, but not directly known to
the package's table of contents (and hence not automatically
removable).  The advantage of using
.Cm @unexec
over a deinstallation script is that you can use the ``special
sequence expansion'' to get at files regardless of where they've
been potentially redirected (see
.Fl p )
.It Cm @mode Ar mode
Sets default permission for all subsequently extracted files to
.Ar mode .
Format is the same as that used by the
.Cm chmod
command (well, considering that it's later handed off to it, that's
no surprise).  Use without an arg to set back to default (extraction)
permissions.
.It Cm @owner Ar user
Sets default ownership for all subsequently extracted files to
.Ar user .
Use without an arg to set back to default (extraction)
ownership.
.It Cm @group Ar group
Sets default group ownership for all subsequently extracted files to
.Ar group .
Use without an arg to set back to default (extraction)
group ownership.
.It Cm @comment Ar string
Imbed a comment in the packing list.  Useful in
trying to document some particularly hairy sequence that
may trip someone up later.
.It Cm @ignore
Used internally to tell extraction to ignore the next file (don't
copy it anywhere), as it's used for some special purpose. 
.It Cm @ignore_inst
Similar to
.Cm @ignore ,
but the ignoring of the next file is delayed one evaluation cycle.  This
makes it possible to use this directive in the 
.Ar packinglist
file, so you can pack a
specialized datafile in with a distribution for your install script (or
something) yet have the installer ignore it.
.It Cm @name Ar name
Sets the name of the package.  This is mandatory and is usually
put at the top.  This name is potentially different than the name of
the file it came in, and is used when keeping track of the package
for later deinstallation.  Note that
.Nm
will derive this field from the package name and add it automatically
if none is given.
.It Cm @dirrm Ar name
Declare directory
.Pa name
to be deleted at deinstall time.  By default, directories created by a
package installation are not deleted when the package is deinstalled;
this provides an explicit directory cleanup method.  This directive
should appear at the end of the package list.  If more than one
.Cm @dirrm
directives are used, the directories are removed in the order specified.
The
.Pa name
directory will not be removed unless it is empty.
.It Cm @mtree Ar name
Declare
.Pa name
as an
.Xr mtree 8
input file to be used at install time (see 
.Fl m
above).  Only the first
.Cm @mtree
directive is honored. 
.It Cm @display Ar name
Declare
.Pa name
as the file to be displayed at install time (see 
.Fl D
above).
.It Cm @pkgdep Ar pkgname
Declares a dependency on the
.Ar pkgname
package.  The
.Ar pkgname
package must be installed before this package may be
installed, and this package must be deinstalled before the
.Ar pkgname
package is deinstalled.  Multiple
.Cm @pkgdep
directives may be used if the package depends on multiple other packages.
.El
.Sh SEE ALSO
.Xr pkg_add 1 ,
.Xr pkg_delete 1 ,
.Xr pkg_info 1 ,
.Xr sysconf 3 .
.Sh HISTORY
The
.Nm
command first appeared in FreeBSD.
.Sh AUTHORS
.Bl -tag -width indent -compact
.It "Jordan Hubbard"
most of the work
.It "John Kohl"
refined it for NetBSD
.El
.Sh BUGS
Hard links between files in a distribution must be bracketed by
.Cm @cwd
directives in order to be preserved as hard links when the package is
extracted.  They additionally must not end up being split between
.Cm tar
invocations due to exec argument-space limitations (this depends on the
value returned by
.Fn sysconf _SC_ARG_MAX ) .
.Pp
Sure to be others.