NAME

       opam-update - Update the list of available packages.

SYNOPSIS

       opam update [OPTION]... [REPOSITORIES]...

DESCRIPTION

       This command updates each repository that has been previously set up by the opam init or
       opam repository commands. The list of packages that can be upgraded will be printed out,
       and the user can use opam upgrade to upgrade them.

ARGUMENTS

       REPOSITORIES
           List of repository names.

OPTIONS

       -j JOBS, --jobs=JOBS
           Set the maximal number of concurrent jobs to use. You can also set it using the
           OPAMJOBS environment variable.

       --json=FILENAME
           Save the result output of an OPAM run in a computer-readable file

       -R, --repositories
           Only update repositories, not development packages.

       --sync-archives
           Always sync the remote archives files. This is not a good idea to enable this, unless
           your really know what your are doing: this flag will make OPAM try to download the
           archive files for ALL the available packages.

       -u, --upgrade
           Automatically run opam upgrade --yes after the update.

COMMON OPTIONS

       These options are common to all commands.

       --color=WHEN (absent=auto)
           Colorize the output. WHEN must be `always', `never' or `auto'.

       --compat-mode-1.0
           Compatibility mode with OPAM 1.0

       --debug
           Print debug message on stdout. This is equivalent to setting $OPAMDEBUG to a non-empty
           value.

       --git-version
           Print the git version if it exists and exit.

       --help[=FMT] (default=pager)
           Show this help in format FMT (pager, plain or groff).

       --no-aspcud
           Do not use the external aspcud solver, even if available.

       --no-base-packages
           Do not install base packages (useful for testing purposes). This is equivalent to
           setting $OPAMNOBASEPACKAGES to a non-empty string.

       -q, --quiet
           Be quiet when installing a new compiler.

       -r ROOT, --root=ROOT (absent=~/.opam)
           Use ROOT as the current root path. This is equivalent to setting $OPAMROOT to ROOT.

       --strict
           Fail whenever an error is found in a package definition or a configuration file. The
           default is to continue silently if possible.

       --switch=SWITCH
           Use SWITCH as the current compiler switch. This is equivalent to setting $OPAMSWITCH
           to SWITCH.

       -v, --verbose
           Be more verbose. This is equivalent to setting $OPAMVERBOSE to a non-empty value.

       --version
           Show version information.

       -y, --yes
           Disable interactive mode and answer yes to all questions that would otherwise be asked
           to the user. This is equivalent to setting $OPAMYES to a non-empty string.

ENVIRONMENT VARIABLES

       opam makes use of environment variables listed here.

       OPAMCOLOR, when set to always or never, sets a default value for the --color option

       OPAMCURL can be used to define an alternative for the 'curl' command-line utility to
       download files

FURTHER DOCUMENTATION

       See https://opam.ocaml.org.

AUTHORS

       Thomas Gazagnaire <thomas@gazagnaire.org>
       Anil Madhavapeddy <anil@recoil.org>
       Fabrice Le Fessant <Fabrice.Le_fessant@inria.fr>
       Frederic Tuong <tuong@users.gforge.inria.fr>
       Louis Gesbert <louis.gesbert@ocamlpro.com>
       Vincent Bernardoff <vb@luminar.eu.org>
       Guillem Rieu <guillem.rieu@ocamlpro.com>

BUGS

       Check bug reports at https://github.com/OCamlPro/opam/issues.