Provided by: gem2deb_1.0.5ubuntu1_amd64 
NAME
dh_ruby - debhelper7 build system for Ruby software
SYNOPSIS
dh_ruby [OPTIONS]
DESCRIPTION
dh_ruby is a Debhelper 7 build system for Ruby software. It will automatically build and install files
contained in Ruby packages, trying to work as close to Rubygems as possible but respecting Debian
standards for Ruby packages.
dh_ruby can automatically run your tests against all supported Ruby versions, see the "FILES" section
below.
See dh_ruby --help for details.
SOURCE PACKAGE LAYOUT
dh_ruby supports two different source package styles: single-binary source packages, and multi-binary
source packages.
Single-binary layout
The default layout is the single-binary layout. This is the layout used by most Ruby packages upstream,
i.e. Ruby code in lib/, executable programs in bin/, etc. Packages imported from Rubygems using
gem2deb(1) will have this layout.
When using this layout, dh_ruby will install files (Ruby code, executables, gemspecs) to the first binary
package listed in debian/control.
Multi-binary layout
gem2deb version 0.4.0 introduced support for the multi-binary layout. This layout should be used when you
have a set of different Ruby packages maintained upstream in a single VCS, and you decide that you also
want to maintain a single source package in Debian having the different components as separate binary
packages.
In this layout, the source package contains the separate components in subdirectories where each of them
will use the standard Ruby layout (lib/, bin/, etc).
This layout does not support creating separate binary packages from the same root directory. For those
cases, see the documentation on DH_RUBY_USE_DH_AUTO_INSTALL_DESTDIR below.
To indicate that you want to use a multi-binary layout, we have to 1) list your multiple binary packages
in debian/control as usual, and add an extra-field called X-DhRuby-Root to each binary package stanza,
indicating which directory has to be used as the root for that binary package.
An example:
Source: mymultibinarypackage
[...]
Package: ruby-foo
X-DhRuby-Root: path/to/foo
[...]
Package: ruby-bar
X-DhRuby-Root: path/to/bar
The corresponding source package should be layed out like this:
foo/
foo.gemspec
lib/
foo.rb
bin/foo
bar/
bar.gemspec
lib/
bar.rb
bin/
bar
Important notes about multi-binary packages and the usage of X-DhRuby-Root:
• If your package uses the multi-binary layout, it must include `gem2deb (>= 0.4.0~)` in Build-Depends.
Version 0.4.0 had a bug in the support for native extensions in multi-binary packages, so if your
package uses the multi-binary feature and at least one of the sub-components has native extensions,
you must use `gem2deb (>= 0.4.1~)` in Build-Depends instead.
• The path indicated in X-DhRuby-Root, as you have probably guessed by now, must be relative to the
root of the source package.
• If any binary package declares a X-DhRuby-Root field, all other binary packages that don't have one
will be ignored by dh_ruby.
OPTIONS
--clean, --configure, --build, --test, --install
Commands called by debhelper at various steps of the build process.
--print-supported
Prints the supported Ruby versions.
-h, --help
Displays dh_ruby usage information.
-v, --version
Displays dh_ruby version information.
--gem-install
This option indicates that the build should use the gem command to install the files, instead of the
homegrown installer. Native packages will be installed to
/usr/lib/$ARCH/rubygems-integration/$RUBY_VERSION, while pure Ruby packages will be installed to
/usr/share/rubygems-integration/all.
There is an internal whitelist of directories from the source package that need to be installed, but
we can't possibly know all possibilities: if a package needs to install a directory that is not
automatically installed, use DH_RUBY_GEM_INSTALL_WHITELIST_APPEND. If you want to exclude a directory
from being installed, use DH_RUBY_GEM_INSTALL_BLACKLIST_APPEND.
--setuprb
This option indicates that the build should use setup.rb rather than the usual gem-based build. To
take effect, this option must come first !
SUBSTITUTION VARIABLES
${ruby:Depends}
${ruby:Depends} will expand to the runtime dependencies of the package. This is determined by taking
the runtime dependencies from the Rubygems metadata, and then mapping them to Debian package names.
The relevant packages must be installed during the package build for the mapping to be successful
(normally they should be hardcoded in the Build-Depends: field).
ENVIRONMENT VARIABLES
DH_RUBY
Use this variable to pass command line parameters to dh_ruby. For example in debian/rules:
export DH_RUBY = --gem-install
DH_RUBY_IGNORE_TESTS
This is a space-separated list of tests that dh_ruby will ignore during package build. The available
test names are the names of all supported Ruby versions (you can list them with `dh_ruby
--print-supported`).
If set to "all", all tests will be ignored during the package build.
DH_RUBY_USE_DH_AUTO_INSTALL_DESTDIR
If this variable is defined (to anything), dh_ruby will respect the directory informed by
dh_auto_install(1), usually debian/tmp. By default, gem2deb will install files to debian/package,
where package is the first binary package listed in debian/control.
This is useful for multi-binary source packages that don't conform to the supported layout (i.e.
separate subdirectories each with lib/, bin/ etc). Using this, all files will be installed to
debian/tmp, and you can them distribute them into separate binary packages by using
debian/$package.install files or explicit shell calls in debian/rules.
Mixing DH_RUBY_USE_DH_AUTO_INSTALL_DESTDIR and multi-binary layout is not supported.
DH_RUBY_GEMSPEC
Determines which file contain the gem specification with package metadata. By default, dh_ruby will
read metadata from a .gemspec file in the root of source package directory. You can use this variable
to override that if you want to provide custom metadata for the Debian package.
In the case there are more than one .gemspec in the source package root, you will need to use
DH_RUBY_GEMSPEC to instruct dh_ruby about which one to use.
DH_RUBY_GEM_INSTALL_WHITELIST_APPEND.
When using --gem-install, this variable adds files to the list of files that need to be installed.
Entries must be separated by spaces, and can be either exact filenames, of glob expressions (e.g.
*.txt, foo/*).
Directories cannot be added directly, only files. If you want to include an entire directory, say
foo, use a glob expression like foo/*.
Note that by default all top-level files are automatically blacklisted, except VERSION* which is used
by some packages. If you need a top-level file to be installed, you need to whitelist it.
DH_RUBY_GEM_INSTALL_BLACKLIST_APPEND.
When using --gem-install, this variable adds files to the list of files that SHOULD NOT be installed.
Entries must be separated by spaces, and must be either specific filenames, or glob expressions (e.g.
*.txt).
Directories cannot be blacklisted directly. To blacklist an entire directory, use a glob expression
such as foo/*.
FILES
debian/ruby-test-files.yaml, debian/ruby-tests.rake, debian/ruby-tests.rb
Theses files can be used to explicitly tell dh_ruby how to run the tests in your package. When
running the tests, dh_ruby will automatically set RUBYLIB to include the appropriate directories
where the package files were installed in your package to make sure the tests use them instead of the
files in the source directory.
Your package can only contain at most one of these files.
debian/ruby-test-files.yaml must contain a YAML document with a list of test files to be run. If the
package metadata contains an explicit list of test files, gem2deb(1) will automatically generate this
file for you. Example from ruby-mime-types:
---
- test/test_mime_type.rb
- test/test_mime_types.rb
debian/ruby-tests.rake can be used to run the tests with rake(1). You can use anything you would use
in a regular Rakefile, but you must define a default task. gem2deb includes a utility test task that
makes it easier for you by creating a default task automatically. Example:
require 'gem2deb/rake/testtask'
Gem2Deb::Rake::TestTask.new do |t|
t.test_files = FileList['test/*_test.rb']
end
You can also use the equivalent RSpec task:
require 'gem2deb/rake/spectask'
Gem2Deb::Rake::RSpecTask.new do |spec|
spec.pattern = './spec/**/*_spec.rb'
end
If debian/ruby-tests.rb exists, it will be run with each supported Ruby version, and must finish with
a exit status of 0, otherwise dh_ruby assumes the tests failed. A simple example:
require 'test/unit'
require 'mypackage' # if 'mypackage.rb' or 'mypackage.so' was not installed properly, this will fail
class MyPackageTest < Test::Unit::TestCase
def test_features
assert_equal 4, MyPackage.sum(2,2)
end
end
debian/dh_ruby.mk
If this file is present, dh_ruby will call make passing it as the makefile during the build, in the
clean, build, and install steps, like this:
clean: make -f debian/dh_ruby.mk clean
build: make -f debian/dh_ruby.mk
install: make -f debian/dh_ruby.mk install
If you want the upstream Makefile to be used, just make debian/dh_ruby.mk a symlink to ../Makefile.
debian/dh_ruby.rake
If this file is present, dh_ruby will call rake passing it as the rakefile during the build, in the
clean, build, and install steps, like this:
clean: rake -f debian/dh_ruby.rake clean
build: rake -f debian/dh_ruby.rake
install: rake -f debian/dh_ruby.rake install
If you want the upstream Rakefile to be used, just make debian/dh_ruby.rake a symlink to ../Rakefile.
debian/gemspec
If this file exists, it will be used as the package gemspec, regardless of metadata.yml and any
*.gemspec that exists in the upstream source. Using this is only advised on single-binary source
packages, and the behavior of this feature is undefined for multi-binary source packages (see SOURCE
PACKAGE LAYOUT above).
If debian/gemspec is a symlink, it will first be expanded, and then the symlink target will be used
as a gemspec.
Hint: for packages with multiple gemspec, you can have debian/gemspec as a symlink pointing to the
one you want to use.
SEE ALSO
gem2deb(1)
COPYRIGHT AND AUTHORS
Copyright (c) 2011, Lucas Nussbaum <lucas@debian.org>
This program is free software: you can redistribute it and/or modify it under the terms of the GNU
General Public License as published by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see
<http://www.gnu.org/licenses/>.
2020-03-11 DH_RUBY(1)