dune(1)

NAME

dune - composable build system for OCaml

SYNOPSIS

dune build [--watch]

dune runtest [--watch]

dune exec NAME

dune utop [DIR]

dune install

dune init project NAME [PATH] [--libs=l1,l2 --ppx=p1,p2 --inline-tests]

DESCRIPTION

Dune is a build system designed for OCaml projects only. It focuses on providing the user with a consistent experience and takes care of most of the low-level details of OCaml compilation. All you have to do is provide a description of your project and Dune will do the rest.

The scheme it implements is inspired from the one used inside Jane Street and adapted to the open source world. It has matured over a long time and is used daily by hundreds of developers, which means that it is highly tested and productive.

COMMANDS

build
    Build the given targets, or all installable targets if none are given.

cache
    Manage the shared artifacts cache

clean
    Clean the project.

compute
    Compute internal function.

describe
    Describe the workspace.

exec
    Execute a command in a similar environment as if installation was performed.

external-lib-deps
    Print out external libraries needed to build the given targets.

format-dune-file
    Format dune files

help
    Additional Dune help

init
    Initialize dune components

install
    Install packages.

installed-libraries
    Print out libraries installed on the system.

ocaml-merlin
    Start a merlin configuration server

printenv
    Print the environment of a directory

promote
    Promote files from the last run

rules
    Dump internal rules.

runtest
    Run tests.

subst
    Substitute watermarks in source files.

top Print a list of toplevel directives for including directories and loading cma files.

uninstall
    Uninstall packages.

upgrade
    Upgrade jbuilder projects to dune

utop
    Load library in utop

COMMAND ALIASES

test
    An alias for runtest.

OPTIONS

--build-info
    Show build information.

-f, --force
    Force actions associated to aliases to be re-executed even if their dependencies haven't changed.

--help[=FMT] (default=auto)
    Show this help in format FMT. The value FMT must be one of `auto', `pager', `groff' or `plain'. With `auto', the format is `pager` or `plain' whenever the TERM env var is `dumb' or undefined.

--sandbox=VAL (absent DUNE_SANDBOX env)
    Sandboxing mode to use by default. Some actions require a certain sandboxing mode, so they will ignore this setting. The allowed values are: none, symlink, copy.

--version
    Show version information.

-w, --watch
    Instead of terminating build after completion, wait continuously for file changes.

COMMON OPTIONS

These options are common to all commands.

--always-show-command-line
    Always show the full command lines of programs executed by dune

--auto-promote
    Automatically promote files. This is similar to running dune promote after the build.

--build-dir=FILE (absent DUNE_BUILD_DIR env)
    Specified build directory. _build if unspecified

--cache=VAL (absent DUNE_CACHE env)
    Activate binary cache (either `disabled' or `enabled'). Default is `disabled'.

--cache-check-probability=VAL (absent=0. or DUNE_CACHE_CHECK_PROBABILITY env)
    Probability cached rules are rerun to check for reproducibility

--cache-duplication=VAL (absent DUNE_CACHE_DUPLICATION env)
    Binary cache duplication mode

--cache-transport=VAL (absent DUNE_CACHE_TRANSPORT env)
    Binary cache protocol

--config-file=FILE
    Load this configuration file instead of the default one.

--debug-artifact-substitution
    Print debugging info about artifact substitution

--debug-backtraces
    Always print exception backtraces.

--debug-dependency-path
    In case of error, print the dependency path from the targets on the command line to the rule that failed.

--debug-findlib
    Debug the findlib sub-system.

--default-target=TARGET (absent=@@default)
    Set the default target that when none is specified to dune build.

--diff-command=VAL
    Shell command to use to diff files. Use - to disable printing the diff.

--disable-promotion (absent DUNE_DISABLE_PROMOTION env)
    Disable all promotion rules

--display=MODE
    Control the display mode of Dune. See dune-config(5) for more details.

--ignore-promoted-rules
    Ignore rules with (mode promote), except ones with (only ...). The variable %{ignoring_promoted_rules} in dune files reflects whether this option was passed or not.

--instrument-with=BACKENDS (absent DUNE_INSTRUMENT_WITH env)
    "Enable instrumentation by BACKENDS. BACKENDS is a comma-separated list of library names, each one of which must declare an instrumentation backend.

-j JOBS
    Run no more than JOBS commands simultaneously.

--no-buffer
    Do not buffer the output of commands executed by dune. By default dune buffers the output of subcommands, in order to prevent interleaving when multiple commands are executed in parallel. However, this can be an issue when debugging long running tests. With --no-buffer, commands have direct access to the terminal. Note that as a result their output won't be captured in the log file. You should use this option in conjunction with -j 1, to avoid interleaving. Additionally you should use --verbose as well, to make sure that commands are printed before they are being executed.

--no-config
    Do not load the configuration file

--no-print-directory
    Suppress "Entering directory" messages

--only-packages=PACKAGES
    Ignore stanzas referring to a package that is not in PACKAGES. PACKAGES is a comma-separated list of package names. Note that this has the same effect as deleting the relevant stanzas from dune files. It is mostly meant for releases. During development, it is likely that what you want instead is to build a particular <package>.install target.

-p PACKAGES, --for-release-of-packages=PACKAGES
    Shorthand for --release --only-packages PACKAGE. You must use this option in your <package>.opam files, in order to build only what's necessary when your project contains multiple packages as well as getting reproducible builds.

--profile=VAL (absent DUNE_PROFILE env)
    Select the build profile, for instance dev or release. The default is dev.

--promote-install-files
    Promote the generated <package>.install files to the source tree

--release
    Put dune into a reproducible release mode. This is in fact a shorthand for --root . --ignore-promoted-rules --no-config --profile release --always-show-command-line --promote-install-files --default-target @install. You should use this option for release builds. For instance, you must use this option in your <package>.opam files. Except if you already use -p, as -p implies this option.

--root=DIR
    Use this directory as workspace root instead of guessing it. Note that this option doesn't change the interpretation of targets given on the command line. It is only intended for scripts.

--store-orig-source-dir (absent DUNE_STORE_ORIG_SOURCE_DIR env)
    Store original source location in dune-package metadata

--terminal-persistence=MODE
     Changes how the log of build results are displayed to the console between rebuilds while in --watch mode.

--trace-file=FILE
    Output trace data in catapult format (compatible with chrome://tracing)

--verbose
    Same as --display verbose

--workspace=FILE (absent DUNE_WORKSPACE env)
    Use this specific workspace file instead of looking it up.

-x VAL
    Cross-compile using this toolchain.

MORE HELP

Use `dune COMMAND --help' for help on a single command.

ENVIRONMENT

These environment variables affect the execution of dune:

DUNE_BUILD_DIR
    Specified build directory. _build if unspecified

DUNE_CACHE
    Activate binary cache (either `disabled' or `enabled'). Default is `disabled'.

DUNE_CACHE_CHECK_PROBABILITY
    Probability cached rules are rerun to check for reproducibility

DUNE_CACHE_DUPLICATION
    Binary cache duplication mode

DUNE_CACHE_TRANSPORT
    Binary cache protocol

DUNE_DISABLE_PROMOTION
    Disable all promotion rules

DUNE_INSTRUMENT_WITH
    "Enable instrumentation by BACKENDS. BACKENDS is a comma-separated list of library names, each one of which must declare an instrumentation backend.

DUNE_PROFILE
    Build profile. dev if unspecified or release if -p is set.

DUNE_SANDBOX
    Sandboxing mode to use by default. (see --sandbox)

DUNE_STORE_ORIG_SOURCE_DIR
    Store original source location in dune-package metadata

DUNE_WORKSPACE
    Use this specific workspace file instead of looking it up.

BUGS

Check bug reports at https://github.com/ocaml/dune/issues

EXAMPLES

1.  Initialise a new project named `foo':

      dune init project foo

2.  Build all targets in the current source tree:

      dune build

3.  Run the executable named `bar':

      dune exec bar

4.  Run all tests in the current source tree:

      dune runtest

5.  Install all components defined in the project:

      dune install

6.  Remove all build artefacts:

      dune clean