dune/doc/terminology.rst

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Terminology
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- **package**: a package is a set of libraries, executables, ... that
are built and installed as one by opam
- **project**: a project is a source tree, maybe containing one or more
packages
- **root**: the root is the directory from where dune can build
things. Dune knows how to build targets that are descendents of
the root. Anything outside of the tree starting from the root is
considered part of the **installed world**. How the root is
determined is explained in :ref:`finding-root`.
- **workspace**: the workspace is the subtree starting from the root.
It can contain any number of projects that will be built
simultaneously by dune
- **installed world**: anything outside of the workspace, that dune
takes for granted and doesn't know how to build
- **installation**: this is the action of copying build artifacts or
other files from the ``<root>/_build`` directory to the installed
world
- **scope**: a scope determines where private items are
visible. Private items include libraries or binaries that will not
be installed. In dune, scopes are sub-trees rooted where at
least one ``<package>.opam`` file is present. Moreover, scopes are
exclusive. Typically, every project defines a single scope. See
:ref:`scopes` for more details
- **build context**: a build context is a subdirectory of the
``<root>/_build`` directory. It contains all the build artifacts of
the workspace built against a specific configuration. Without
specific configuration from the user, there is always a ``default``
build context, which corresponds to the environment in which dune
is executed. Build contexts can be specified by writing a
:ref:`dune-workspace` file
- **build context root**: the root of a build context named ``foo`` is
``<root>/_build/<foo>``
- **alias**: an alias is a build target that doesn't produce any file
and has configurable dependencies. Aliases are
per-directory. However, on the command line, asking for an alias to
be built in a given directory will trigger the construction of the
alias in all children directories recursively. Dune defines the
following standard aliases:
- ``default`` which is the alias build by default when no targets
are specified on the command line. See :ref:`default-alias` for
details
- ``runtest`` which runs user defined tests
- ``install`` which depends on everything that should be installed
- ``doc`` which depends on the generated HTML
documentation. See :ref:`documentation` for details.
- **environment**: in dune, each directory has an environment
attached to it. The environment determines the default values of
various parameters, such as the compilation flags. Inside a scope,
each directory inherit the environment from its parent. At the root
of every scope, a default environment is used. At any point, the
environment can be altered using an :ref:`dune-env` stanza.
- **build profile**: a global setting that influence various
defaults. It can be set from the command line using ``--profile
<profile>`` or from ``dune-workspace`` files. The following
profiles are standard:
- ``release`` which is the profile used for opam releases
- ``dev`` which is the default profile when none is set explicitly, it
has stricter warnings that the ``release`` one