Provided by: gem2deb_2.0.3_amd64 bug


       dh_ruby - debhelper build system for Ruby software


       dh_ruby [OPTIONS]


       dh_ruby is a Debhelper 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.


       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

       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:


       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

           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

       •   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.


       --clean, --configure, --build, --test, --install
           Commands called by debhelper at various steps of the build process.

           Prints the supported Ruby versions.

       -h, --help
           Displays dh_ruby usage information.

       -v, --version
           Displays dh_ruby version information.

           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 include list 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_INCLUDE. If you want to exclude a directory from  being installed,
           use DH_RUBY_GEM_INSTALL_EXCLUDE. Note that for using those variables, you need to
           build depend on gem2deb (>= 1.6~).


       dh_ruby reuses the debhelper(7) compatibility levels for introducing behavior changes that
       might be backwards-incompatible.

       v14 This level is still open for development; use with caution.

           Changes from v13 are:

           Packages are built and tested when executing the build target of debian/rules. The
           build is done as part of dh_auto_build, and the tests are run as part of dh_auto_test.
           The installation into debian/ is performed during the install target, i.e.  during
           dh_auto_install. This means that you can intercept the build between these steps using
           targets such execute_after_dh_auto_build, override_dh_auto_build,
           override_dh_auto_test, execute_before_dh_auto_install etc.

       v13 This is the recommended mode of operation.

           This was the current compatibility level at the point where this mechanism was
           introduced. So even packages with compatibility levels lower than 13 use this mode.

           In this this compatibility level, dh_ruby exhibits its classic behavior. In
           particular, packages are built, installed and tested during the dh_auto_install phase
           of the build process, i.e. when dpkg-buildpackage is invoking the install target of


           ${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).


           Use this variable to pass command line parameters to dh_ruby. For example in

               export DH_RUBY = --gem-install

           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.

           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

           Mixing DH_RUBY_USE_DH_AUTO_INSTALL_DESTDIR and multi-binary layout is not supported.

           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.

           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 excluded, except VERSION*
           which is used by some packages. If you need a top-level file to be installed, you need
           to explicit list it as included.

           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 excluded directly. To exclude an entire directory, use a glob
           expression such as foo/*.


       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'
    do |t|
               t.test_files = FileList['test/*_test.rb']

           You can also use the equivalent RSpec task:

             require 'gem2deb/rake/spectask'
    do |spec|
               spec.pattern = './spec/**/*_spec.rb'

           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 '' was not installed properly, this will fail
             class MyPackageTest < Test::Unit::TestCase
               def test_features
                 assert_equal 4, MyPackage.sum(2,2)

           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/ clean
           build: make -f debian/
           install: make -f debian/ install

           If you want the upstream Makefile to be used, just make debian/ a symlink to

           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.

           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.




       Copyright (c) 2011, Lucas Nussbaum <>

       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 <>.

                                            2022-07-30                                 DH_RUBY(1)