Ubuntu Manpage: opam-remove - Remove a list of packages.

NAME

       opam-remove - Remove a list of packages.

SYNOPSIS

       opam remove [OPTION]... [PACKAGES]...

DESCRIPTION

       This command uninstalls one or more packages currently installed in the currently selected compiler
       switch. To remove packages installed in another compiler, you need to switch compilers using opam switch
       or use the --switch flag. This command is the inverse of opam-install.

ARGUMENTS

       PACKAGES
           List of package names, with an optional version or constraint, e.g `pkg', `pkg.1.0' or `pkg>=0.5'.

OPTIONS

       -a, --auto-remove
           Remove all the packages which have not been explicitly installed and which are not necessary anymore.
           It  is possible to prevent the removal of an already-installed package by running opam install <pkg>.
           This flag can also be set using the $OPAMAUTOREMOVE configuration variable.

       -b, --keep-build-dir
           Keep the build directory. This is equivalent to setting $OPAMKEEPBUILDDIR to "true".

       -d, --build-doc
           Build the package documentation. This is equivalent to setting $OPAMBUILDDOC to "true".

       --dry-run
           Simulate the command, but don't actually perform any changes.

       -e TAGS, --external=TAGS
           Display the external packages associated to the given  tags.  This  is  deprecated,  use  `opam  list
           --external' instead

       --fake
           This  option registers the actions into the OPAM database, without actually performing them. WARNING:
           This option is dangerous and likely to break your OPAM environment. You  probably  want  `--dry-run'.
           You've been warned.

       --force
           Execute  the remove commands of given packages directly, even if they are not considered installed by
           OPAM.

       -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

       -m MAKE, --make=MAKE
           Use MAKE as the default 'make' command.

       --no-checksums
           Do not verify the checksum of downloaded archives.This is equivalent to setting  $OPAMNOCHECKSUMS  to
           "true".

       --require-checksums
           Reject  the installation of packages that don't provide a checksum for the upstream archives. This is
           equivalent to setting $OPAMREQUIRECHECKSUMS to "true".

       --show-actions
           Call the solver and display the actions. Don't perform any changes.

       -t, --build-test
           Build and run the package unit-tests. This is equivalent to setting $OPAMBUILDTEST to "true".

COMMON OPTIONS

       These options are common to all commands.

       --color=WHEN (absent=auto)
           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/Specifying_Solver_Preferences.html.  A  general  guide  to   using   solver
           preferences  can  be found at  http://www.dicosmo.org/Articles/usercriteria.pdf. The default value is
           -count(down),-count(removed),-notuptodate(solution),-sum(solution,version-lag),-count(new)        for
           upgrades,                                                                                         and
           -count(removed),-notuptodate(request),-sum(request,version-lag),-count(down),-notuptodate(changed),-count(changed),-notuptodate(solution),-sum(solution,version-lag)
           otherwise.

       --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 if it exists and exit.

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

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

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

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

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

       --safe
           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.

       --solver=CMD
           Specify  the  name  of  the external dependency solver. The default value is aspcud. Either 'aspcud',
           'packup' or a custom command that may contain the variables %{input}%, %{output}% and %{criteria}%

       --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, --no-aspcud
           Force use of internal heuristics, even if an external solver is available.

       -v, --verbose
           Be more verbose, show package sub-commands and their output. Repeat to see more. Repeating n times is
           equivalent to setting $OPAMVERBOSE to "n".

       --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 "true".

ENVIRONMENT VARIABLES

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

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 is
-count(removed),-notuptodate(request),-sum(request,version-lag),-count(down),-notuptodate(changed),-count(changed),-notuptodate(solution),-sum(solution,version-lag).
See also option --criteria

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.

OPAMEXTERNALSOLVER see option `--solver'.

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

OPAMJOBS sets the maximum number of parallel workers to run.

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

OPAMNO answer no to any question asked.

OPAMNOASPCUD see option `--no-aspcud'.

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

OPAMPINKINDAUTO if set, version control systems are detected when pinning to a local path.

OPAMREQUIRECHECKSUMS see option `--require-checksums'.

OPAMRETRY sets the number of tries before failing downloads.

OPAMROOT see option `--root'. This is automatically set by `opam config env --root=DIR' when DIR is
non-default or OPAMROOT is already defined.

OPAMSAFE see option `--safe'

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

OPAMSOLVERTIMEOUT change the time allowance of the internal solver.

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

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

OPAMUPGRADECRITERIA specifies user preferences for dependency solving when performing an upgrade.
Overrides OPAMCRITERIA in upgrades if both are set.The default value is
-count(down),-count(removed),-notuptodate(solution),-sum(solution,version-lag),-count(new). See also
option --criteria

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

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.

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'.

OPAMYES see option `--yes'.

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>
       Roberto Di Cosmo <roberto@dicosmo.org>

BUGS

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

Opam 1.2.2                                                                                        OPAM-REMOVE(1)