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.TH "kettle_app" n 1 doc "Kettle - The Quick Brew System"
.BS
.SH NAME
kettle_app \- Kettle - Application - Build Interpreter
.SH SYNOPSIS
package require \fBTcl  8.5\fR
.sp
\fBkettle\fR ?\fB-f\fR \fIbuildfile\fR? ?\fB-trace\fR? (\fIgoal\fR|\fB--option\fR \fIvalue\fR)...
.sp
.BE
.SH DESCRIPTION
.PP
.PP
Welcome to Kettle, a set of packages providing support for writing
build code for Tcl packages.
.PP
Please read the document \fIKettle - Introduction to Kettle\fR,
if you have not done so already, to get an overview of the whole system.
.PP
Here we document the kettle application available to a user of kettle,
i.e. a package developer using (or wishing to use) kettle as the build
system for their code.
.PP
This application resides between the kettle core and the build
script written by the package developer, as shown in the archtectural
diagram below.
.PP
IMAGE: arch_app
.PP
For the build (declaration) commands available to build scripts
based on kettle see \fIKettle - Build Declarations\fR.
.SH "THE KETTLE APPLICATION"
The \fBkettle\fR application is the main interpreter for build
declarations. It can be used directly, or as a shell in the hash-bang
line of build files.
.PP
Its general syntax is
.TP
\fBkettle\fR ?\fB-f\fR \fIbuildfile\fR? ?\fB-trace\fR? (\fIgoal\fR|\fB--option\fR \fIvalue\fR)...
In a hash-bang line for a build file the syntax is 'kettle -f', with
the build file becoming the argument to \fB-f\fR, and the arguments
to the build file then following, starting with the optional
\fB-trace\fR.
.sp
Note: The application will look for a build file
"\fIbuild.tcl\fR" in the current working, if no build file is
specified.
.sp
Configuration options and recipes to run can be mixed on the
commandline, with the options processed first, and then the
recipes. For this to work all the options require a value.
.sp
The list of known options, help about them, and their state
after option processing can be queried through the standard recipes
\fBlist-options\fR, \fBhelp-options\fR, and
\fBshow-configuraton\fR.
.sp
The list of known recipes and help about them can be queried
through the standard recipes \fBlist-recipes\fR, and
\fBhelp-recipes\fR.
.sp
Note that the set of recipes is dynamically constructed based
on the scans of source directory made by kettle at the direction of
the build file. I.e. the options on the command line are processed
first, then the build file is used to scan the sources and initialize
the necessary recipes, at last the recipes on the command line are
run.
.sp
The application understands one dot-file for configuration,
"\fI~/.kettle/config\fR". This file is expected to contain
user-specific standard options to use. Its contents are processed as
part of the option processing, before the options found on the command
line.
For all other extensibility the user is reminded that build file are
Tcl files, with the full power of the language behind them. Which
includes the builtin command \fBsource\fR.
.sp
If no recipe is specified on the command line a standard recipe
is run. On unix platforms it is "help", whereas on windows "gui" is
used.
.PP
.SH OPTIONS
.TP
\fB--bin-dir\fR path
This configuration option specifies the path to the directory
applications (binary and script) will be installed into.
.sp
The default value is the directory of the \fBtclsh\fR used
to run the \fBkettle\fR application.
.sp
If the option \fB--exec-prefix\fR is modified the default
value changes to "\fI\fB--exec-prefix\fR/bin\fR".
.TP
\fB--color\fR boolean
The value of this configuration option determines if output is
colorized or not.
.sp
The default value is platform-dependent.
On windows the default is \fBoff\fR, disabling colorization.
On unix the default is \fBon\fR, activating colorization. Except if
it could be determined that the script's \fBstdout\fR is not a
proper terminal, then the default is \fBoff\fR.
.sp
For this last check the system attempts to use the package
\fBTclx\fR. If that package is not available then it cannot be
determined if \fBstdout\fR is a proper terminal, thus colorization
is active.
.TP
\fB--config\fR path
This is an internal option used by kettle for the communication
between parent and child instances when handling a recursive
invokation. The generated file specified as the value of the option
holds the configuration of the parent, for the child to read and use.
.TP
\fB--dry\fR boolean
The value of this configuration option determines if (un)installation
modifies the file system (\fBoff\fR) or not (\fBon\fR == dry run).
.sp
The default value is \fBoff\fR. This means that the system
will modify the file system as instructed by recipes.
.TP
\fB--exec-prefix\fR path
This configuration option specifies the path to the root directory for
all platform-dependent (binary) installation files.
.sp
The default value is "\fI\fB--prefix\fR\fR".
.TP
\fB--html-dir\fR path
This configuration option specifies the path to the directory package
documentation in HTML format will be installed into.
.sp
The default value is "\fI\fB--prefix\fR/html\fR".
.TP
\fB--ignore-glob\fR list
This option specifies the set of files and directories to ignore
during directory scans, as a Tcl list of glob patterns to match.
.sp
The default value is
.RS
.IP [1]
*~
.IP [2]
_FOSSIL_
.IP [3]
.fslckout
.IP [4]
.fos
.IP [5]
.git
.IP [6]
.svn
.IP [7]
CVS
.IP [8]
.hg
.IP [9]
RCS
.IP [10]
SCCS
.IP [11]
*.bak
.IP [12]
*.bzr
.IP [13]
*.cdv
.IP [14]
*.pc
.IP [15]
_MTN
.IP [16]
_build
.IP [17]
_darcs
.IP [18]
_sgbak
.IP [19]
blib
.IP [20]
autom4te.cache
.IP [21]
cover_db
.IP [22]
~.dep
.IP [23]
~.dot
.IP [24]
~.nib
.IP [25]
~.plst
.RE
.IP
matching the special files and directories of various source code
control systems, the backup files of various editors, and the like.
.TP
\fB--include-dir\fR path
This configuration option specifies the path to the directory package
C header files will be installed into.
.sp
The default value is "\fI\fB--prefix\fR/include\fR".
.TP
\fB--lib-dir\fR path
This configuration option specifies the path to the directory packages
(binary and script) will be installed into.
.sp
The default value is the [\fBinfo library\fR] directory
of the \fBtclsh\fR used to run the \fBkettle\fR application.
.sp
If the option \fB--exec-prefix\fR is modified the default
value changes to "\fI\fB--exec-prefix\fR/lib\fR".
.TP
\fB--log\fR path
An option for recipe 'test', if defined. Its value is the path "stem"
for a series of files testsuite information is saved into. The actual
files use the specified stem and add their specifc file extension to
it.
.sp
The default is the empty string, disabling the saving of
testsuite information.
.TP
\fB--log-mode\fR compact|full
An option for recipe 'test', if defined. Its value determines the
verbosity of test suite information printed to the terminal or log window.
.sp
The default is \fBcompact\fR.
.TP
\fB--man-dir\fR path
This configuration option specifies the path to the directory package
documentation (manpages, in *roff format) will be installed into.
.sp
The default value is "\fI\fB--prefix\fR/man\fR".
.TP
\fB--prefix\fR path
This configuration option specifies the path to the root directory for
all platform-independent (non-binary) installation files.
.sp
The default value is the twice parent of the
[\fBinfo library\fR] directory of the \fBtclsh\fR used to
run the \fBkettle\fR application.
.TP
\fB--state\fR path
This is an internal option used by kettle for the communication
between parent and child instances when handling a recursive
invokation. The generated file specified as the value of the option
holds the work state of the parent, for the child to read and extend.
.TP
\fB--target\fR string
The value of this option is the target name \fBcritcl\fR should use
to build C code.
.sp
The default value is the empty string, leaving the choice of
target to \fBcritcl\fR itself.
.TP
\fB--verbose\fR boolean
The value of this configuration option determines if tracing of system
internals is done (\fBon\fR), or not (\fBoff\fR). This is the
option equivalent of the special flag \fB-trace\fR.
.sp
The default value is \fBoff\fR, disabling tracing of internals.
.TP
\fB--with-doc-destination\fR path
This configuration option specifies the path to the directory the
generated documentation should be placed into for the documentation
installa recipes to pick up from.
.sp
This should be a relative path, which will interpreted relative
to the package source directory.
.sp
The default value is "\fIembedded\fR".
.sp
A build declaration file can override this default with the
\fBkettle doc-destination\fR command.
.TP
\fB--with-critcl3\fR path
This configuration option specifies the path to the tool
\fBcritcl3\fR for the compilation and installation of critcl-based
C code.
.sp
The default value is the path to the first of
.RS
.IP [1]
"\fIcritcl3\fR",
.IP [2]
"\fIcritcl3.kit\fR",
.IP [3]
"\fIcritcl3.tcl\fR",
.IP [4]
"\fIcritcl3.exe\fR",
.IP [5]
"\fIcritcl\fR",
.IP [6]
"\fIcritcl.kit\fR",
.IP [7]
"\fIcritcl.tcl\fR", and
.IP [8]
"\fIcritcl.exe\fR"
.RE
.IP
found on the \fBPATH\fR. None of these matter however should the
system find the package \fBcritcl\fR version 3 or higher among the
packages known to the \fBtclsh\fR running the \fBkettle\fR
application. In that case kettle will run everything in itself,
without invoking critcl child processes.
.TP
\fB--with-dia\fR path
This configuration option specifies the path to the tool
\fBdia\fR for tklib/diagram-based diagram processing.
.sp
The default value is the path to the first of
"\fIdia\fR",
"\fIdia.kit\fR",
"\fIdia.tcl\fR", and
"\fIdia.exe\fR"
found on the \fBPATH\fR.
.TP
\fB--with-dtplite\fR path
This configuration option specifies the path to the tool
\fBdtplite\fR for doctools-based documentation processing.
.sp
The default value is the path to the first of
"\fIdtplite\fR",
"\fIdtplite.kit\fR",
"\fIdtplite.tcl\fR", and
"\fIdtplite.exe\fR"
found on the \fBPATH\fR.
.TP
\fB--with-shell\fR path
.PP
.SH "STANDARD RECIPES"
The following recipes are understood by \fBkettle\fR regardless of
build definitions. They are its \fIstandard\fR recipes.
.TP
\fBgui\fR
Opens a standard graphical interface.
This is the standard recipe run on windows if no recipe was
specified on the command line.
.TP
\fBhelp-options\fR
Print the help for all known options.
.TP
\fBhelp-recipes\fR
Print the help for all defined recipes.
.TP
\fBhelp\fR
The combination of the previous two recipes.
This is the standard recipe run on unix if no recipe was
specified on the command line.
.TP
\fBlist-options\fR
Print a list of all known options.
.TP
\fBlist-recipes\fR
Print a list of all defined recipes.
.TP
\fBlist\fR
The combination of the previous two recipes.
.TP
\fBnull\fR
This recipe does nothing.
It is generally only useful for kettle developers, in
combination with option \fB-trace\fR.
.TP
\fBshow-configuration\fR
Print the state of the option database after processing the
dot-file and command line settings.
.TP
\fBshow-state\fR
Print the state of various internal global settings
after processing the dot-file and command line settings.
.PP
.SH "BUILD.TCL EXAMPLE"
A simple example of a build.tcl script is that for kettle itself.
.PP
Stripping out the special code taking care of the fact that it
cannot assume to have kettle installed already this reduces to the
code below, and of that only the last two lines are relevant in terms
of build declarations. The first three are the (bourne) shell magic to
find and run the kettle application in the \fBPATH\fR environment
variable. (The actual code assumes that \fBkettle\fR is found the
working directory, again it cannot assume to be installed already).
.PP
.CS


#!/bin/sh
# -*- tcl -*- \\
exec kettle -f "$0" "${1+$@}"
kettle tcl
kettle tclapp kettle

.CE
.PP
The code asks the system to search for and handle all Tcl
script packages to be found in the directory of the "\fIbuild.tcl\fR"
file, and declares that we have a script application named
\fBkettle\fR in the same directory.
As the documentation files and figures are in the standard locations,
\fBkettle tcl\fR is allowed to handle them implicitly.
.PP
Done.
.SH LICENSE
This package, written by Andreas Kupries, is BSD licensed.
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems.
Please report such at the
\fIKettle Tracker\fR [https://chiselapp.com/user/andreas_kupries/repository/Kettle/index].
Please also report any ideas for enhancements you may have for either
package and/or documentation.
.SH KEYWORDS
build tea
.SH CATEGORY
Build support