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dh-exec - Online in the Cloud

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This is the command dh-exec that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


dh-exec - Debhelper executable file helpers

SYNOPSIS


#! /usr/bin/dh-exec
src/libfoo-*.so.* debian/foo-plugins/usr/lib/foo/${DEB_HOST_MULTIARCH}/
etc/example.conf => debian/foo/etc/foo/foo.conf
[linux-any kfreebsd-any] some-arch-specific-file /usr/lib/foo/

DESCRIPTION


dh-exec is a simple program, meant to be used as the interpreter for executable debhelper
config files.

It is a wrapper around the various other sub-commands (see below), and will pipe the input
file through all of them in turn, using an ordering that makes most sense in the vast
majority of cases.

The order as of now is dh-exec-subst gets run first, followed by dh-exec-install, so that
variable expansion happens before files need to be copied.

FILTERING


In all dh-exec handled files, lines can be pre- or post-fixed with a list of architectures
for which the rest of the line should apply to. All architectures and wildcards known by
dpkg-architecture(1) are recognised, even negated ones.

ARCHITECTURE


dh-exec is built up from three layers: there is the dh-exec utility, its single entry
point, the only thing one will need to call.

Below that, there are the various sub-commands, such as dh-exec-subst, dh-exec-filter,
dh-exec-install and dh-exec-illiterate, which are thin wrappers around the various dh-exec
scripts, that make sure they only run those that need to be run.

And the lowest layer are the various scripts that do the actual work.

One can control which sub-commands to run, or if even more granularity is desired, one can
limit which scripts shall be run, too. See below for the options!

OPTIONS


--with=command[,command ...]
Replace the list of sub-commands to run the input through with a custom list (where
entries are separated by whitespace or commas). This option will always replace the
existing list with whatever is specified.

This can be used to explicitly set which sub-commands to use.

The list must not include the dh-exec- prefix.

Defaults to subst,install.

--without=command[,command ...]
Inversely to the option above, this lists all the sub-commands which should not be
used.

The list must not include the dh-exec- prefix.

--with-scripts=script[,script ...]
Replace the list of scripts to run the input through with a custom list (where entries
are separated by whitespace or commas). This option will always replace the existing
list with whatever is specified.

This can be used to explicitly specify which scripts to use, limiting even beyond what
the --with option is capable of.

The list must not include the dh-exec- prefix.

By default it is empty, meaning there is no filtering done, and whatever scripts the
sub-commands find, will be run.

--no-act
Do not really do anything, but print the pipeline that would have been run instead.

--list
List the available sub-commands and scripts, grouped by sub-command.

--help, --version
Display a short help or the package version, respectively.

SUB-COMMANDS


dh-exec-subst
Substitutes various variables (either from the environment, or from
dpkg-architecture(1)).

dh-exec-filter
Filters the input in various ways (architecture restrictions, build profiles, and
so on).

dh-exec-install
An extension to dh_install(1), that supports renaming files during the copy
process, using a special syntax.

ENVIRONMENT


DH_EXEC_LIBDIR
The directory in which the wrapped sub-commands reside. Defaults to /usr/lib/dh-exec/.

DH_EXEC_SCRIPTDIR
The directory in which the scripts that do the heavy work live. Defaults to
/usr/share/dh-exec/.

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