master | 2.0 | 2.1 |
---|---|---|
Opam is a source-based package manager for OCaml. It supports multiple simultaneous compiler installations, flexible package constraints, and a Git-friendly development workflow.
Opam was created and is maintained by OCamlPro.
To get started, checkout the Install and Usage guides.
Either from an existing opam installation, use
opam pin add .
if you cloned locally the repository,
opam pin add git+https://github.com/ocaml/opam
otherwise, or:
- Make sure you have the required dependencies installed:
- GNU make
- OCaml >= 4.08 (or see below)
- A C++ compiler (unless building without a solver, see
./configure --without-mccs
)
- Run
./configure
. If you don't have the dependencies installed, this will locally take care of all OCaml dependencies for you (downloading them, unless you used the inclusive archive we provide for each release). - Run
make
- Run
make install
This is all you need for installing and using opam, but if you want to use the
opam-lib
(to work on opam-related tools), you need to link it to installed
libraries. It's easier to already have a working opam installation in this case,
so you can do it as a second step.
- Make sure to have
ocamlfind
,ocamlgraph
,cmdliner
>= 1.0.0,cudf
>= 0.7,dose3
>= 6.1,re
>= 1.9.0,opam-file-format
installed. Or runopam install . --deps-only
if you already have a working instance. Re-run./configure
once done - Run
make libinstall
at the end
Note: If you install on your system (without changing the prefix), you will
need to install as root (sudo
). As sudo
does not propagate environment
variables, there will be some errors. You can use sudo -E "PATH=$PATH"
in order
to ensure you have a good environment for install.
If you are developing opam, you may enable developer features by including the
--enable-developer-mode
parameter with ./configure
.
Cygwin (https://www.cygwin.com/setup-x86_64.exe) is always required to build opam on Windows.
The following Cygwin packages are required:
- From Devel -
make
- From Devel -
patch
(not required if OCaml and all required packages are pre-installed) - From Devel -
autoconf
- From Devel -
curl
- From Devel -
mingw64-i686-gcc-g++
&mingw64-x86_64-gcc-g++
(not required if building with MSVC)
Alternatively, having downloaded Cygwin's setup program, Cygwin can be installed using the following command line:
setup-x86_64 --root=C:\cygwin64 --quiet-mode --no-desktop --no-startmenu --packages=make,mingw64-i686-gcc-g++,mingw64-x86_64-gcc-g++,patch,autoconf,curl
The --no-desktop
and --no-startmenu
switches may be omitted in order to create
shortcuts on the Desktop and Start Menu, respectively. Executed this way, setup will
still be interactive, but the packages will have been preselected. To make setup
fully unattended, choose a mirror URL from https://cygwin.com/mirrors.lst and add
the --site
switch to the command line
(e.g., --site=https://www.mirrorservice.org/sites/sourceware.org/pub/cygwin/
).
It is recommended that you set the CYGWIN
environment variable to
nodosfilewarning winsymlinks:native
.
Cygwin is started either from a shortcut or by running:
C:\cygwin64\bin\mintty -
We recommended you build opam outside Cygwin's root
(so in /cygdrive/c/...
). From an elevated Cygwin shell, edit /etc/fstab
and
ensure that the file's content is exactly:
none /cygdrive cygdrive noacl,binary,posix=0,user 0 0
The change is the addition of the noacl
option to the mount instructions for
/cygdrive
and this stops from Cygwin from attempting to emulate POSIX permissions
over NTFS (which can result in strange and unnecessary permissions showing up in
Windows Explorer). It is necessary to close and restart all Cygwin terminal windows
after changing /etc/fstab
.
Opam is able to be built without a preinstalled OCaml compiler. For the MSVC ports of OCaml, the Microsoft Windows SDK 7 or later or Microsoft Visual Studio is required (https://www.microsoft.com/en-gb/download/details.aspx?id=8442 - either x86 or x64 may be installed, as appropriate to your system). It is not necessary to modify PATH, INCLUDE, or LIB. Opam's build system will automatically detect the required changes.
If OCaml is not preinstalled, run:
make compiler [OCAML_PORT=mingw64|mingw|msvc64|msvc|auto]
The OCAML_PORT
variable determines which flavour of Windows OCaml is compiled;
auto
will attempt to guess. As long as GCC is not installed in Cygwin
(i.e., the native C compiler for Cygwin), OCAML_PORT
does not need to be
specified and auto
will be assumed. Once the compiler is built, you may run:
./configure --with-vendored-deps
and build opam as above.
make cold
is provided as a facility to compile OCaml, then bootstrap opam.
You don't need to run ./configure
in that case, but
you may specify CONFIGURE_ARGS
if needed. E.g.,:
make cold CONFIGURE_ARGS="--prefix ~/local"
make cold-install
NOTE: You'll still need GNU make.
Have a bug or a feature request? Please open an issue on our
bug-tracker. Please search for existing
issues before posting and include the output of opam config report
and any
details that may help track down the issue.
The main documentation entry point to opam is the user manual,
available using opam --help
. To get help for a specific command, use
opam <command> --help
.
A collection of guides and tutorials is available online. They are generated from the files in doc/pages.
A more thorough technical document describing opam and specifying the package
description format is available in the
developer manual. make doc
will otherwise make the API documentation available under doc/
.
Keep track of development and community news.
-
Have a question that's not a feature request or bug report? Ask on the mailing list.
-
Chat with fellow opamers on IRC. On the
irc.libera.chat
server, in the#ocaml
or the#opam
channel.
We welcome contributions! Please use GitHub's pull-request mechanism against
the master branch of the opam repository. If
that's not an option for you, you can use git format-patch
and email us.
The release cycle of the opam binary respects Semantic Versioning. Note however that the version ordering used for user packages managed by opam follows the Debian definition (more details in this section of the user manual).
- ocaml/opam-repository is the official repository for opam packages and compilers. A number of unofficial repositories are also available on the interwebs, for instance on Github.
- opam2web generates a collection of browsable HTML files for a given repository. It is used to generate http://opam.ocaml.org.
- opam-rt is the regression framework for opam.
- opam-publish is a tool to facilitate the creation, update, and publication of opam packages.
The version comparison function in src/core/opamVersionCompare.ml
is part of
the Dose library and Copyright 2011 Ralf Treinen.
All other code is:
Copyright 2012-2020 OCamlPro Copyright 2012 INRIA
All rights reserved. Opam is distributed under the terms of the GNU Lesser General Public License version 2.1, with the special exception on linking described in the file LICENSE.
Opam 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 Lesser General Public License for more details.