ttree
TTREE(1p) User Contributed Perl Documentation TTREE(1p)
NAME
Template::Tools::ttree - Process entire directory trees of templates
SYNOPSIS
ttree [options] [files]
DESCRIPTION
The ttree script is used to process entire directory trees containing
template files. The resulting output from processing each file is then
written to a corresponding file in a destination directory. The script
compares the modification times of source and destination files (where
they already exist) and processes only those files that have been
modified. In other words, it is the equivalent of 'make' for the
Template Toolkit.
It supports a number of options which can be used to configure
behaviour, define locations and set Template Toolkit options. The
script first reads the .ttreerc configuration file in the HOME
directory, or an alternative file specified in the TTREERC environment
variable. Then, it processes any command line arguments, including any
additional configuration files specified via the "-f" (file) option.
The .ttreerc Configuration File
When you run ttree for the first time it will ask you if you want it to
create a .ttreerc file for you. This will be created in your home
directory.
$ ttree
Do you want me to create a sample '.ttreerc' file for you?
(file: /home/abw/.ttreerc) [y/n]: y
/home/abw/.ttreerc created. Please edit accordingly and re-run ttree
The purpose of this file is to set any global configuration options
that you want applied every time ttree is run. For example, you can use
the "ignore" and "copy" / "link" options to provide regular expressions
that specify which files should be ignored and which should be copied
or linked rather than being processed as templates. You may also want
to set flags like "verbose" and "recurse" according to your preference.
A minimal .ttreerc:
# ignore these files
ignore = \b(CVS|RCS)\b
ignore = ^#
ignore = ~$
# copy these files
copy = \.(gif|png|jpg|pdf)$
# recurse into directories
recurse
# provide info about what's going on
verbose
In most cases, you'll want to create a different ttree configuration
file for each project you're working on. The "cfg" option allows you
to specify a directory where ttree can find further configuration
files.
cfg = /home/abw/.ttree
The "-f" command line option can be used to specify which configuration
file should be used. You can specify a filename using an absolute or
relative path:
$ ttree -f /home/abw/web/example/etc/ttree.cfg
$ ttree -f ./etc/ttree.cfg
$ ttree -f ../etc/ttree.cfg
If the configuration file does not begin with "/" or "." or something
that looks like a MS-DOS absolute path (e.g. "C:\\etc\\ttree.cfg") then
ttree will look for it in the directory specified by the "cfg" option.
$ ttree -f test1 # /home/abw/.ttree/test1
The "cfg" option can only be used in the .ttreerc file. All the other
options can be used in the .ttreerc or any other ttree configuration
file. They can all also be specified as command line options.
Remember that .ttreerc is always processed before any configuration
file specified with the "-f" option. Certain options like "lib" can be
used any number of times and accumulate their values.
For example, consider the following configuration files:
/home/abw/.ttreerc:
cfg = /home/abw/.ttree
lib = /usr/local/tt2/templates
/home/abw/.ttree/myconfig:
lib = /home/abw/web/example/templates/lib
When ttree is invoked as follows:
$ ttree -f myconfig
the "lib" option will be set to the following directories:
/usr/local/tt2/templates
/home/abw/web/example/templates/lib
Any templates located under /usr/local/tt2/templates will be used in
preference to those located under /home/abw/web/example/templates/lib.
This may be what you want, but then again, it might not. For this
reason, it is good practice to keep the .ttreerc as simple as possible
and use different configuration files for each ttree project.
Directory Options
The "src" option is used to define the directory containing the source
templates to be processed. It can be provided as a command line option
or in a configuration file as shown here:
src = /home/abw/web/example/templates/src
Each template in this directory typically corresponds to a single web
page or other document.
The "dest" option is used to specify the destination directory for the
generated output.
dest = /home/abw/web/example/html
The "lib" option is used to define one or more directories containing
additional library templates. These templates are not documents in
their own right and typically comprise of smaller, modular components
like headers, footers and menus that are incorporated into pages
templates.
lib = /home/abw/web/example/templates/lib
lib = /usr/local/tt2/templates
The "lib" option can be used repeatedly to add further directories to
the search path.
A list of templates can be passed to ttree as command line arguments.
$ ttree foo.html bar.html
It looks for these templates in the "src" directory and processes them
through the Template Toolkit, using any additional template components
from the "lib" directories. The generated output is then written to
the corresponding file in the "dest" directory.
If ttree is invoked without explicitly specifying any templates to be
processed then it will process every file in the "src" directory. If
the "-r" (recurse) option is set then it will additionally iterate down
through sub-directories and process and other template files it finds
therein.
$ ttree -r
If a template has been processed previously, ttree will compare the
modification times of the source and destination files. If the source
template (or one it is dependant on) has not been modified more
recently than the generated output file then ttree will not process it.
The -a (all) option can be used to force ttree to process all files
regardless of modification time.
$ tree -a
Any templates explicitly named as command line argument are always
processed and the modification time checking is bypassed.
File Options
The "ignore", "copy", "link" and "accept" options are used to specify
Perl regexen to filter file names. Files that match any of the "ignore"
options will not be processed. Remaining files that match any of the
"copy" or "link" regexen will be copied or linked to the destination
directory. Remaining files that then match any of the "accept" criteria
are then processed via the Template Toolkit. If no "accept" parameter
is specified then all files will be accepted for processing if not
already copied or ignored.
# ignore these files
ignore = \b(CVS|RCS)\b
ignore = ^#
ignore = ~$
# copy these files
copy = \.(gif|png|jpg|pdf)$
# accept only .tt2 templates
accept = \.tt2$
The "suffix" option is used to define mappings between the file
extensions for source templates and the generated output files. The
following example specifies that source templates with a ".tt2" suffix
should be output as ".html" files:
suffix tt2=html
Or on the command line,
--suffix tt2=html
You can provide any number of different suffix mappings by repeating
this option.
The "binmode" option is used to set the encoding of the output file.
For example use "--binmode=:utf8" to set the output format to unicode.
Template Dependencies
The "depend" and "depend_file" options allow you to specify how any
given template file depends on another file or group of files. The
"depend" option is used to express a single dependency.
$ ttree --depend foo=bar,baz
This command line example shows the "--depend" option being used to
specify that the foo file is dependant on the bar and baz templates.
This option can be used many time on the command line:
$ ttree --depend foo=bar,baz --depend crash=bang,wallop
or in a configuration file:
depend foo=bar,baz
depend crash=bang,wallop
The file appearing on the left of the "=" is specified relative to the
"src" or "lib" directories. The file(s) appearing on the right can be
specified relative to any of these directories or as absolute file
paths.
For example:
$ ttree --depend foo=bar,/tmp/baz
To define a dependency that applies to all files, use "*" on the left
of the "=".
$ ttree --depend *=header,footer
or in a configuration file:
depend *=header,footer
Any templates that are defined in the "pre_process", "post_process",
"process" or "wrapper" options will automatically be added to the list
of global dependencies that apply to all templates.
The "depend_file" option can be used to specify a file that contains
dependency information.
$ ttree --depend_file=/home/abw/web/example/etc/ttree.dep
Here is an example of a dependency file:
# This is a comment. It is ignored.
index.html: header footer menubar
header: titlebar hotlinks
menubar: menuitem
# spanning multiple lines with the backslash
another.html: header footer menubar \
sidebar searchform
Lines beginning with the "#" character are comments and are ignored.
Blank lines are also ignored. All other lines should provide a
filename followed by a colon and then a list of dependant files
separated by whitespace, commas or both. Whitespace around the colon
is also optional. Lines ending in the "\" character are continued onto
the following line.
Files that contain spaces can be quoted. That is only necessary for
files after the colon (':'). The file before the colon may be quoted if
it contains a colon.
As with the command line options, the "*" character can be used as a
wildcard to specify a dependency for all templates.
* : config,header
Template Toolkit Options
ttree also provides access to the usual range of Template Toolkit
options. For example, the "--pre_chomp" and "--post_chomp" ttree
options correspond to the "PRE_CHOMP" and "POST_CHOMP" options.
Run "ttree -h" for a summary of the options available.
AUTHORS
Andy Wardley <abw@andywardley.com>
<http://www.andywardley.com/>
With contributions from Dylan William Hardison (support for
dependencies), Bryce Harrington ("absolute" and "relative" options),
Mark Anderson ("suffix" and "debug" options), Harald Joerg and Leon
Brocard who gets everywhere, it seems.
VERSION
2.68, distributed as part of the Template Toolkit version 2.19,
released on 27 April 2007.
COPYRIGHT
Copyright (C) 1996-2007 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
SEE ALSO
tpage
perl v5.30.0 2019-10-19 TTREE(1p)
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