Provided by: opam-docs_1.2.2-4_all 
NAME
opam-list - Display the list of available packages.
SYNOPSIS
opam list [OPTION]... [PATTERNS]...
DESCRIPTION
This command displays the list of installed packages when called without argument, or the list of
available packages matching the given pattern.
Unless the --short switch is used, the output format displays one package per line, and each line
contains the name of the package, the installed version or -- if the package is not installed, and a
short description. In color mode, root packages (eg. manually installed) are underlined.
The full description can be obtained by doing opam show <package>. You can search through the package
descriptions using the opam search command.
ARGUMENTS
PATTERNS
List of package patterns.
OPTIONS
-A, --unavailable
List all packages, even those which can't be installed on the system
-a, --all
List all the packages which can be installed on the system. This is the default when a query argument
is supplied.
--depends-on=PACKAGES
List only packages that depend on one of (comma-separated) PACKAGES.
--depopts
Include optional dependencies in dependency requests.
-e [TAGS], --external[=TAGS] (default=)
Instead of displaying the packages, display their external dependencies that are associated with any
subset of the given TAGS (OS, distribution, etc.). Common tags include `debian', `x86', `osx',
`homebrew', `source'... Without TAGS, display the tags and all associated external dependencies.
Rather than using this directly, you should probably head for the `depext' plugin, that can infer
your system's tags and handle the system installations. Run `opam depext'.
-i, --installed
List installed packages only. This is the the default when no argument is supplied. With `--resolve',
means "compute a solution from the currently installed packages" instead.
--installed-roots
Display only the installed roots.
--recursive
With `--depends-on' and `--required-by', display all transitive dependencies rather than just direct
dependencies.
--required-by=PACKAGES
List only the dependencies of (comma-separated) PACKAGES.
--resolve=PACKAGES
Restrict to a solution to install (comma-separated) PACKAGES, i.e. a consistent set of packages
including those. This is subtly different from `--required-by --recursive`, which is more predictable
and can't fail, but lists all dependencies independently without ensuring consistency. Without
`--installed`, the answer is self-contained and independent of the current installation. With
`--installed', it's computed from the set of currently installed packages. `--unavailable` further
makes the solution independent from the currently pinned packages, architecture, and compiler
version. The combination with `--depopts' is not supported.
-s, --short
Output raw lists of names, one per line, skipping any details.
-S, --sort
Sort the packages in dependency order.
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.