NAME

       opam-repository - Manage opam repositories.

SYNOPSIS

       opam repository [OPTION]... [COMMAND] [ARG]...

DESCRIPTION

       This command is used to manage package repositories. Repositories can be registered
       through subcommands add, remove and set-url, and are updated from their URLs using opam
       update. Their names are global for all switches, and each switch has its own selection of
       repositories where it gets package definitions from.

       Main commands add, remove and set-repos act only on the current switch, unless differently
       specified using options explained in SCOPE SPECIFICATION OPTIONS.

       Without a subcommand, or with the subcommand list, lists selected repositories, or all
       configured repositories with --all.

COMMANDS

       Without argument, defaults to list.

       add NAME [ADDRESS] [QUORUM] [FINGERPRINTS]
           Adds under NAME the repository at address ADDRESS to the list of configured
           repositories, if not already registered, and sets this repository for use in the
           current switch (or the specified scope). ADDRESS is required if the repository name is
           not already registered, and is otherwise an error if different from the registered
           address. The quorum is a positive integer that determines the validation threshold for
           signed repositories, with fingerprints the trust anchors for said validation.

           Note: By default, the repository is only added to the current switch. To add a switch
           to other repositories, you need to use the --all or --set-default options (see below).
           If you want to enable a repository only to install of of its switches, you may be
           looking for opam switch create --repositories=REPOS.

       remove NAME...
           Unselects the given repositories so that they will not be used to get package
           definitions anymore. With --all, makes opam forget about these repositories
           completely.

       set-repos NAME...
           Explicitly selects the list of repositories to look up package definitions from, in
           the specified priority order (overriding previous selection and ranks), according to
           the specified scope.

       set-url NAME ADDRESS [QUORUM] [FINGERPRINTS]
           Updates the URL and trust anchors associated with a given repository name. Note that
           if you don't specify [QUORUM] and [FINGERPRINTS], any previous settings will be
           erased.

       list
           Lists the currently selected repositories in priority order from rank 1. With --all,
           lists all configured repositories and the switches where they are active.

       priority NAME RANK
           Synonym to add NAME --rank RANK

SCOPE SPECIFICATION OPTIONS

       These flags allow one to choose which selections are changed by add, remove, set-repos. If
       no flag in this section is specified the updated selections default to the current switch.
       Multiple scopes can be selected, e.g. --this-switch --set-default.

       -a, --all-switches
           Act on the selections of all configured switches

       --dont-select
           Don't update any selections

       --on-switches=SWITCHES
           Act on the selections of the given list of switches

       --set-default
           Act on the default repository selection that is used for newly created switches

       --this-switch
           Act on the selections for the current switch (this is the default)

OPTIONS

       -k KIND, --kind=KIND
           Specify the kind of the repository to be used (one of `http', `local', `git', `darcs'
           or `hg').

       --rank=RANK (absent=1)
           Set the rank of the repository in the list of configured repositories. Package
           definitions are looked in the repositories in increasing rank order, therefore 1 is
           the highest priority. Negative ints can be used to select from the lowest priority, -1
           being last. set-repos can otherwise be used to explicitly set the repository list at
           once.

       -s, --short
           Output raw lists of names, one per line, skipping any details.

COMMON OPTIONS

       These options are common to all commands.

       --best-effort
           Don't fail if all requested packages can't be installed: try to install as many as
           possible. Note that not all external solvers may support this option (recent versions
           of aspcud or mccs should). This is equivalent to setting $OPAMBESTEFFORT environment
           variable.

       --color=WHEN
           Colorize the output. WHEN must be one of `always', `never' or `auto'.

       --criteria=CRITERIA
           Specify user preferences for dependency solving for this run. Overrides both
           $OPAMCRITERIA and $OPAMUPGRADECRITERIA. For details on the supported language, and the
           external solvers available, see  http://opam.ocaml.org/doc/External_solvers.html. A
           general guide to using solver preferences can be found at
           http://www.dicosmo.org/Articles/usercriteria.pdf.

       --cudf=FILENAME
           Debug option: Save the CUDF requests sent to the solver to FILENAME-<n>.cudf.

       --debug
           Print debug message to stderr. This is equivalent to setting $OPAMDEBUG to "true".

       --debug-level=LEVEL
           Like --debug, but allows specifying the debug level (--debug sets it to 1). Equivalent
           to setting $OPAMDEBUG to a positive integer.

       --git-version
           Print the git version of opam, if set (i.e. you are using a development version), and
           exit.

       --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.

       --ignore-pin-depends
           Ignore extra pins required by packages that get pinned, either manually through opam
           pin or through opam install DIR. This is equivalent to setting IGNOREPINDEPENDS=true.

       --json=FILENAME
           Save the results of the opam run in a computer-readable file. If the filename contains
           the character `%', it will be replaced by an index that doesn't overwrite an existing
           file. Similar to setting the $OPAMJSON variable.

       --no-aspcud
           Deprecated.

       --no-auto-upgrade
           When configuring or updating a repository that is written for an earlier opam version
           (1.2), opam internally converts it to the current format. This disables this
           behaviour. Note that repositories should define their format version in a 'repo' file
           at their root, or they will be assumed to be in the older format. It is, in any case,
           preferable to upgrade the repositories manually using opam admin upgrade [--mirror
           URL] when possible.

       --no-self-upgrade
           Opam will replace itself with a newer binary found at OPAMROOT/opam if present. This
           disables this behaviour.

       -q, --quiet
           Disables --verbose.

       --root=ROOT
           Use ROOT as the current root path. This is equivalent to setting $OPAMROOT to ROOT.

       --safe, --readonly
           Make sure nothing will be automatically updated or rewritten. Useful for calling from
           completion scripts, for example. Will fail whenever such an operation is needed ; also
           avoids waiting for locks, skips interactive questions and overrides the $OPAMDEBUG
           variable. This is equivalent to set environment variable $OPAMSAFE.

       --solver=CMD
           Specify the CUDF solver to use for resolving package installation problems. This is
           either a predefined solver (this version of opam supports builtin-mccs+lp(),
           builtin-mccs+glpk, aspcud, mccs, aspcud-old, packup), or a custom command that should
           contain the variables %{input}%, %{output}%, %{criteria}%, and optionally %{timeout}%.
           This is equivalent to setting $OPAMEXTERNALSOLVER.

       --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.

       --use-internal-solver
           Disable any external solver, and use the built-in one (this requires that opam has
           been compiled with a built-in solver). This is equivalent to setting $OPAMNOASPCUD or
           $OPAMUSEINTERNALSOLVER.

       -v, --verbose
           Be more verbose. One -v shows all package commands, repeat to also display commands
           called internally (e.g. tar, curl, patch etc.) Repeating n times is equivalent to
           setting $OPAMVERBOSE to "n".

       --version
           Show version information.

       -w, --working-dir
           Whenever updating packages that are bound to a local, version-controlled directory,
           update to the current working state of their source instead of the last committed
           state, or the ref they are pointing to. This only affects packages explicitly listed
           on the command-line.It can also be set with $OPAMWORKINGDIR.

       -y, --yes
           Answer yes to all yes/no questions without prompting. This is equivalent to setting
           $OPAMYES to "true".

ENVIRONMENT VARIABLES

       Opam makes use of the environment variables listed here. Boolean variables should be set
       to "0", "no", "false" or the empty string to disable, "1", "yes" or "true" to enable.

       OPAMALLPARENS surround all filters with parenthesis

       OPAMAUTOREMOVE see remove option `--auto-remove`

       OPAMBESTEFFORT see option `--best-effort`

       OPAMBESTEFFORTPREFIXCRITERIA sets the string that must be prepended to the criteria when
       the `--best-effort` option is set, and is expected to maximise the `opam-query` property
       in the solution

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

       OPAMCRITERIA specifies user preferences for dependency solving. The default value depends
       on the solver version, use `config report` to know the current setting. See also option
       --criteria

       OPAMCUDFFILE file save the cudf graph to file-actions-explicit.dot

       OPAMCURL can be used to select a given 'curl' program. See OPAMFETCH for more options.

       OPAMDEBUG see options `--debug' and `--debug-level'.

       OPAMDOWNLOADJOBS sets the maximum number of simultaneous downloads.

       OPAMDRYRUN see option `--dry-run`

       OPAMEDITOR sets the editor to use for opam file editing, overrides $EDITOR and $VISUAL

       OPAMERRLOGLEN sets the number of log lines printed when a sub-process fails. 0 to print
       all.

       OPAMEXTERNALSOLVER see option `--solver'.

       OPAMFAKE see option `--fake`

       OPAMFETCH specifies how to download files: either `wget', `curl' or a custom command where
       variables %{url}%, %{out}%, %{retry}%, %{compress}% and %{checksum}% will be replaced.
       Overrides the 'download-command' value from the main config file.

       OPAMFIXUPCRITERIA same as OPAMUPGRADECRITERIA, but specific to fixup

       OPAMIGNORECONSTRAINTS see install option `--ignore-constraints-on`

       OPAMIGNOREPINDEPENDS see option `--ignore-pin-depends`

       OPAMJOBS sets the maximum number of parallel workers to run.

       OPAMJSON log json output to the given file (use character `%' to index the files)

       OPAMLOCKED see install option `--locked`

       OPAMLOGS logdir sets log directory, default is a temporary directory in /tmp

       OPAMMAKECMD set the system make command to use

       OPAMNOAUTOUPGRADE disables automatic internal upgrade of repositories in an earlier format
       to the current one, on 'update' or 'init'.

       OPAMKEEPLOGS tells opam to not remove some temporary command logs and some backups. This
       skips some finalisers and may also help to get more reliable backtraces

       OPAMLOCKRETRIES sets the number of tries after which opam gives up acquiring its lock and
       fails. <= 0 means infinite wait.

       OPAMMERGEOUT merge process outputs, stderr on stdout

       OPAMNO answer no to any question asked.

       OPAMNOASPCUD Deprecated.

       OPAMNOCHECKSUMS enables option --no-checksums when available.

       OPAMNOSELFUPGRADE see option `--no-self-upgrade'.

       OPAMPINKINDAUTO sets whether version control systems should be detected when pinning to a
       local path. Enabled by default since 1.3.0.

       OPAMPRECISETRACKING fine grain tracking of directories

       OPAMREQUIRECHECKSUMS Enables option `--require-checksums' when available (e.g. for `opam
       install`).

       OPAMRETRES sets the number of tries before failing downloads.

       OPAMROOT see option `--root'. This is automatically set by `opam env --root=DIR
       --set-root'.

       OPAMROOTISOK don't complain when running as root.

       OPAMSAFE see option `--safe'

       OPAMSHOW see option `--show`

       OPAMSKIPUPDATE see option `--skip-updates`

       OPAMSKIPVERSIONCHECKS bypasses some version checks. Unsafe, for compatibility testing
       only.

       OPAMSOLVERTIMEOUT change the time allowance of the solver. Default is 60.0, set to 0 for
       unlimited. Note that all solvers may not support this option.

       OPAMSTATUSLINE display a dynamic status line showing what's currently going on on the
       terminal. (one of one of `always', `never' or `auto')

       OPAMSTATS display stats at the end of command

       OPAMSTRICT fail on inconsistencies (file reading, switch import, etc.)

       OPAMSWITCH see option `--switch'. Automatically set by `opam env --switch=SWITCH
       --set-switch'.

       OPAMUNLOCKBASE see install option `--unlock-base`

       OPAMUPGRADECRITERIA specifies user preferences for dependency solving when performing an
       upgrade. Overrides OPAMCRITERIA in upgrades if both are set. See also option --criteria

       OPAMUSEINTERNALSOLVER see option `--use-internal-solver'.

       OPAMUSEOPENSSL force openssl use for hash computing

       OPAMUTF8 use UTF8 characters in output (one of one of `always', `never' or `auto'). By
       default `auto', which is determined from the locale).

       OPAMUTF8MSGS use extended UTF8 characters (camels) in opam messages. Implies OPAMUTF8.
       This is set by default on OSX only.

       OPAMVALIDATIONHOOK hook if set, uses the `%{hook%}` command to validate an opam repository
       update

       OPAMVAR_var overrides the contents of the variable var when substituting `%{var}%` strings
       in `opam` files.

       OPAMVAR_package_var overrides the contents of the variable package:var when substituting
       `%{package:var}%` strings in `opam` files.

       OPAMVERBOSE see option `--verbose'.

       OPAMWORKINGDIR see option `--working-dir`

       OPAMYES see option `--yes'.

EXIT STATUS

       As an exception to the following, the `exec' command returns 127 if the command was not
       found or couldn't be executed, and the command's exit value otherwise.

       0   Success, or true for boolean queries.

       1   False. Returned when a boolean return value is expected, e.g. when running with
           --check, or for queries like opam lint.

       2   Bad command-line arguments, or command-line arguments pointing to an invalid context
           (e.g. file not following the expected format).

       5   Not found. You requested something (package, version, repository, etc.) that couldn't
           be found.

       10  Aborted. The operation required confirmation, which wasn't given.

       15  Could not acquire the locks required for the operation.

       20  There is no solution to the user request. This can be caused by asking to install two
           incompatible packages, for example.

       30  Error in package definition, or other metadata files. Using --strict raises this error
           more often.

       31  Package script error. Some package operations were unsuccessful. This may be an error
           in the packages or an incompatibility with your system. This can be a partial error.

       40  Sync error. Could not fetch some remotes from the network. This can be a partial
           error.

       50  Configuration error. Opam or system configuration doesn't allow operation, and needs
           fixing.

       60  Solver failure. The solver failed to return a sound answer. It can be due to a broken
           external solver, or an error in solver configuration.

       99  Internal error. Something went wrong, likely due to a bug in opam itself.

       130 User interrupt. SIGINT was received, generally due to the user pressing Ctrl-C.

FURTHER DOCUMENTATION

       See https://opam.ocaml.org/doc.

AUTHORS

       Vincent Bernardoff <vb@luminar.eu.org>
       Raja Boujbel <raja.boujbel@ocamlpro.com>
       Roberto Di Cosmo <roberto@dicosmo.org>
       Thomas Gazagnaire <thomas@gazagnaire.org>
       Louis Gesbert <louis.gesbert@ocamlpro.com>
       Fabrice Le Fessant <Fabrice.Le_fessant@inria.fr>
       Anil Madhavapeddy <anil@recoil.org>
       Guillem Rieu <guillem.rieu@ocamlpro.com>
       Ralf Treinen <ralf.treinen@pps.jussieu.fr>
       Frederic Tuong <tuong@users.gforge.inria.fr>

BUGS

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