1OPAM(1) Opam Manual OPAM(1)
2
6 opam - source-based package management
7
9 opam [COMMAND] …
10
12 Opam is a package manager. It uses the powerful mancoosi tools to
13 handle dependencies, including support for version constraints,
14 optional dependencies, and conflict management. The default
15 configuration binds it to the official package repository for OCaml.
16 It has support for different remote repositories such as HTTP, rsync,
18 git, darcs and mercurial. Everything is installed within a local opam
19 directory, that can include multiple installation prefixes with
20 different sets of intalled packages.
21 Use either opam <command> --help or opam help <command> for more
23 information on a specific command.
24
26 admin [OPTION]…
27 Tools for repository administrators
28 clean [OPTION]…
30 Cleans up opam caches
31 config [OPTION]… [COMMAND] [ARG]…
33 Display configuration options for packages.
34 env [OPTION]…
36 Prints appropriate shell variable assignments to stdout
37 exec [OPTION]… COMMAND [ARG]...…
39 Executes a command in the proper opam environment
40 help [--man-format=FMT] [OPTION]… [TOPIC]
42 Display help about opam and opam commands.
43 init [OPTION]… [NAME] [ADDRESS]
45 Initialize opam state, or set init options.
46 install [OPTION]… [PACKAGES]…
48 Install a list of packages.
49 lint [OPTION]… [FILES]…
51 Checks and validate package description ('opam') files.
52 list [OPTION]… [PATTERNS]…
54 Display the list of available packages.
55 lock [OPTION]… [PACKAGES]…
57 Create locked opam files to share build environments across hosts.
58 option [--global] [--no] [--yes] [OPTION]… [FIELD[(=|+=|-=)[VALUE]]]
60 Global and switch configuration options settings
61 pin [OPTION]… [COMMAND] [ARG]…
63 Pin a given package to a specific version or source.
64 reinstall [OPTION]… [PACKAGES]…
66 Reinstall a list of packages.
67 remove [OPTION]… [PACKAGES]…
69 Remove a list of packages.
70 repository [OPTION]… [COMMAND] [ARG]…
72 Manage opam repositories.
73 show [OPTION]… [PACKAGES]…
75 Display information about specific packages.
76 source [OPTION]… PACKAGE
78 Get the source of an opam package.
79 switch [OPTION]… [COMMAND] [ARG]…
81 Manage multiple installation prefixes.
82 update [OPTION]… [NAMES]…
84 Update the list of available packages.
85 upgrade [OPTION]… [PACKAGES]…
87 Upgrade the installed package to latest version.
88 var [OPTION]… [VAR[=[VALUE]]]
90 Display and update the value associated with a given variable
91
93 info [OPTION]… [PACKAGES]…
94 An alias for show.
95 remote [OPTION]… [COMMAND] [ARG]…
97 An alias for repository.
98 search [OPTION]… [PATTERNS]…
100 An alias for list --search.
101 uninstall [OPTION]… [PACKAGES]…
103 An alias for remove.
104 unpin [OPTION]… [ARG]…
106 An alias for pin remove.
107
109 --no
110 Answer no to all opam yes/no questions without prompting. See also
111 --confirm-level. This is equivalent to setting $OPAMNO to "true".
112 -y, --yes
114 Answer yes to all opam yes/no questions without prompting. See also
115 --confirm-level. This is equivalent to setting $OPAMYES to "true".
116
118 These options are common to all commands.
119 --best-effort
121 Don't fail if all requested packages can't be installed: try to
122 install as many as possible. Note that not all external solvers may
123 support this option (recent versions of aspcud or mccs should).
124 This is equivalent to setting $OPAMBESTEFFORT environment variable.
125 --cli=MAJOR.MINOR (absent=2.1)
127 Use the command-line interface syntax and semantics of MAJOR.MINOR.
128 Intended for any persistent use of opam (scripts, blog posts,
129 etc.), any version of opam in the same MAJOR series will behave as
130 for the specified MINOR release. The flag was not available in opam
131 2.0, so to select the 2.0 CLI, set the OPAMCLI environment variable
132 to 2.0 instead of using this parameter.
133 --color=WHEN
135 Colorize the output. WHEN must be one of always, never or auto.
136 --confirm-level=LEVEL
138 Confirmation level, LEVEL must be one of ask, no, yes or
139 unsafe-yes. Can be specified more than once. If --yes or --no are
140 also given, the value of the last --confirm-level is taken into
141 account. This is equivalent to setting $OPAMCONFIRMLEVEL`.
142 --criteria=CRITERIA
144 Specify user preferences for dependency solving for this run.
145 Overrides both $OPAMCRITERIA and $OPAMUPGRADECRITERIA. For details
146 on the supported language, and the external solvers available, see
147 http://opam.ocaml.org/doc/External_solvers.html. A general guide to
148 using solver preferences can be found at
149 http://www.dicosmo.org/Articles/usercriteria.pdf.
150 --cudf=FILENAME
152 Debug option: Save the CUDF requests sent to the solver to
153 FILENAME-<n>.cudf.
154 --debug
156 Print debug message to stderr. This is equivalent to setting
157 $OPAMDEBUG to "true".
158 --debug-level=LEVEL
160 Like --debug, but allows specifying the debug level (--debug sets
161 it to 1). Equivalent to setting $OPAMDEBUG to a positive integer.
162 --git-version
164 Print the git version of opam, if set (i.e. you are using a
165 development version), and exit.
166 --help[=FMT] (default=auto)
168 Show this help in format FMT. The value FMT must be one of auto,
169 pager, groff or plain. With auto, the format is pager or plain
170 whenever the TERM env var is dumb or undefined.
171 --ignore-pin-depends
173 Ignore extra pins required by packages that get pinned, either
174 manually through opam pin or through opam install DIR. This is
175 equivalent to setting IGNOREPINDEPENDS=true.
176 --json=FILENAME
178 Save the results of the opam run in a computer-readable file. If
179 the filename contains the character `%', it will be replaced by an
180 index that doesn't overwrite an existing file. Similar to setting
181 the $OPAMJSON variable.
182 --no-aspcud
184 Removed in 2.1.
185 --no-auto-upgrade
187 When configuring or updating a repository that is written for an
188 earlier opam version (1.2), opam internally converts it to the
189 current format. This disables this behaviour. Note that
190 repositories should define their format version in a 'repo' file at
191 their root, or they will be assumed to be in the older format. It
192 is, in any case, preferable to upgrade the repositories manually
193 using opam admin upgrade [--mirror URL] when possible.
194 --no-self-upgrade
196 Opam will replace itself with a newer binary found at OPAMROOT/opam
197 if present. This disables this behaviour.
198 -q, --quiet
200 Disables --verbose.
201 --root=ROOT
203 Use ROOT as the current root path. This is equivalent to setting
204 $OPAMROOT to ROOT.
205 --safe, --readonly
207 Make sure nothing will be automatically updated or rewritten.
208 Useful for calling from completion scripts, for example. Will fail
209 whenever such an operation is needed ; also avoids waiting for
210 locks, skips interactive questions and overrides the $OPAMDEBUG
211 variable. This is equivalent to set environment variable $OPAMSAFE.
212 --solver=CMD
214 Specify the CUDF solver to use for resolving package installation
215 problems. This is either a predefined solver (this version of opam
216 supports builtin-mccs+lp(), builtin-mccs+glpk,
217 builtin-dummy-z3-solver, builtin-dummy-0install-solver, aspcud,
218 mccs, aspcud-old, packup), or a custom command that should contain
219 the variables %{input}%, %{output}%, %{criteria}%, and optionally
220 %{timeout}%. This is equivalent to setting $OPAMEXTERNALSOLVER.
221 --strict
223 Fail whenever an error is found in a package definition or a
224 configuration file. The default is to continue silently if
225 possible.
226 --switch=SWITCH
228 Use SWITCH as the current compiler switch. This is equivalent to
229 setting $OPAMSWITCH to SWITCH.
230 --use-internal-solver
232 Disable any external solver, and use the built-in one (this
233 requires that opam has been compiled with a built-in solver). This
234 is equivalent to setting $OPAMNOASPCUD or $OPAMUSEINTERNALSOLVER.
235 -v, --verbose
237 Be more verbose. One -v shows all package commands, repeat to also
238 display commands called internally (e.g. tar, curl, patch etc.)
239 Repeating n times is equivalent to setting $OPAMVERBOSE to "n".
240 --version
242 Show version information.
243 -w, --working-dir
245 Whenever updating packages that are bound to a local,
246 version-controlled directory, update to the current working state
247 of their source instead of the last committed state, or the ref
248 they are pointing to. As source directory is copied as it is, if it
249 isn't clean it may result on a opam build failure.This only affects
250 packages explicitly listed on the command-line.It can also be set
251 with $OPAMWORKINGDIR.
252
254 Opam makes use of the environment variables listed here. Boolean
255 variables should be set to "0", "no", "false" or the empty string to
256 disable, "1", "yes" or "true" to enable.
257 OPAMALLPARENS surround all filters with parenthesis.
259 OPAMASSUMEDEPEXTS see option `--assume-depexts'.
261 OPAMAUTOREMOVE see remove option `--auto-remove'.
263 OPAMBESTEFFORT see option `--best-effort'.
265 OPAMBESTEFFORTPREFIXCRITERIA sets the string that must be prepended to
267 the criteria when the `--best-effort' option is set, and is expected to
268 maximise the `opam-query' property in the solution.
269 OPAMBUILDDOC Removed in 2.1.
271 OPAMBUILDTEST Removed in 2.1.
273 OPAMCLI see option `--cli'.
275 OPAMCOLOR when set to always or never, sets a default value for the
277 `--color' option.
278 OPAMCONFIRMLEVEL see option `--confirm-level`. OPAMCONFIRMLEVEL has
280 priority over OPAMYES and OPAMNO.
281 OPAMCRITERIA specifies user preferences for dependency solving. The
283 default value depends on the solver version, use `config report' to
284 know the current setting. See also option --criteria.
285 OPAMCUDFFILE save the cudf graph to file-actions-explicit.dot.
287 OPAMCUDFTRIM controls the filtering of unrelated packages during CUDF
289 preprocessing.
290 OPAMCURL can be used to select a given 'curl' program. See OPAMFETCH
292 for more options.
293 OPAMDEBUG see options `--debug' and `--debug-level'.
295 OPAMDEBUGSECTIONS if set, limits debug messages to the space-separated
297 list of sections. Sections can optionally have a specific debug level
298 (for example, CLIENT:2 or CLIENT CUDF:2), but otherwise use
299 `--debug-level'.
300 OPAMDIGDEPTH defines how aggressive the lookup for conflicts during
302 CUDF preprocessing is.
303 OPAMDOWNLOADJOBS sets the maximum number of simultaneous downloads.
305 OPAMDROPWORKINGDIR overrides packages previously updated with
307 --working-dir on update. Without this variable set, opam would keep
308 them unchanged unless explicitly named on the command-line.
309 OPAMDRYRUN see option `--dry-run'.
311 OPAMEDITOR sets the editor to use for opam file editing, overrides
313 $EDITOR and $VISUAL.
314 OPAMERRLOGLEN sets the number of log lines printed when a sub-process
316 fails. 0 to print all.
317 OPAMEXTERNALSOLVER see option `--solver'.
319 OPAMFAKE see option `--fake'.
321 OPAMFETCH specifies how to download files: either `wget', `curl' or a
323 custom command where variables %{url}%, %{out}%, %{retry}%,
324 %{compress}% and %{checksum}% will be replaced. Overrides the
325 'download-command' value from the main config file.
326 OPAMFIXUPCRITERIA same as OPAMUPGRADECRITERIA, but specific to fixup.
328 OPAMIGNORECONSTRAINTS see install option `--ignore-constraints-on'.
330 OPAMIGNOREPINDEPENDS see option `--ignore-pin-depends'.
332 OPAMINPLACEBUILD see option `--inplace-build'.
334 OPAMJOBS sets the maximum number of parallel workers to run.
336 OPAMJSON log json output to the given file (use character `%' to index
338 the files).
339 OPAMKEEPBUILDDIR see install option `--keep-build-dir'.
341 OPAMKEEPLOGS tells opam to not remove some temporary command logs and
343 some backups. This skips some finalisers and may also help to get more
344 reliable backtraces.
345 OPAMLOCKED combination of `--locked' and `--lock-suffix' options.
347 OPAMLOGS logdir sets log directory, default is a temporary directory in
349 /tmp
350 OPAMMAKECMD set the system make command to use.
352 OPAMMERGEOUT merge process outputs, stderr on stdout.
354 OPAMNO answer no to any question asked, see options `--no` and
356 `--confirm-level`. OPAMNO is ignored if either OPAMCONFIRMLEVEL or
357 OPAMYES is set.
358 OPAMNOAGGREGATE with `opam admin check', don't aggregate packages.
360 OPAMNOASPCUD Deprecated.
362 OPAMNOAUTOUPGRADE disables automatic internal upgrade of repositories
364 in an earlier format to the current one, on 'update' or 'init'.
365 OPAMNOCHECKSUMS enables option --no-checksums when available.
367 OPAMNODEPEXTS disables system dependencies handling, see option
369 `--no-depexts'.
370 OPAMNOENVNOTICE Internal.
372 OPAMNOSELFUPGRADE see option `--no-self-upgrade'
374 OPAMPINKINDAUTO sets whether version control systems should be detected
376 when pinning to a local path. Enabled by default since 1.3.0.
377 OPAMPRECISETRACKING fine grain tracking of directories.
379 OPAMPREPRO set this to false to disable CUDF preprocessing. Less
381 efficient, but might help debugging solver issue.
382 OPAMREQUIRECHECKSUMS Enables option `--require-checksums' when
384 available (e.g. for `opam install').
385 OPAMRETRIES sets the number of tries before failing downloads.
387 OPAMREUSEBUILDDIR see option `--reuse-build-dir'.
389 OPAMROOT see option `--root'. This is automatically set by `opam env
391 --root=DIR --set-root'.
392 OPAMROOTISOK don't complain when running as root.
394 OPAMSAFE see option `--safe'.
396 OPAMSHOW see option `--show'.
398 OPAMSKIPUPDATE see option `--skip-updates'.
400 OPAMSKIPVERSIONCHECKS bypasses some version checks. Unsafe, for
402 compatibility testing only.
403 OPAMSOLVERALLOWSUBOPTIMAL (default `true') allows some solvers to still
405 return a solution when they reach timeout; while the solution remains
406 assured to be consistent, there is no guarantee in this case that it
407 fits the expected optimisation criteria. If `true', opam willcontinue
408 with a warning, if `false' a timeout is an error. Currently only the
409 builtin-z3 backend handles this degraded case.
410 OPAMSOLVERTIMEOUT change the time allowance of the solver. Default is
412 60.0, set to 0 for unlimited. Note that all solvers may not support
413 this option.
414 OPAMSTATS display stats at the end of command.
416 OPAMSTATUSLINE display a dynamic status line showing what's currently
418 going on on the terminal. (one of one of always, never or auto)
419 OPAMSTRICT fail on inconsistencies (file reading, switch import, etc.).
421 OPAMSWITCH see option `--switch'. Automatically set by `opam env
423 --switch=SWITCH --set-switch'.
424 OPAMUNLOCKBASE see install option `--unlock-base'.
426 OPAMUPGRADECRITERIA specifies user preferences for dependency solving
428 when performing an upgrade. Overrides OPAMCRITERIA in upgrades if both
429 are set. See also option --criteria.
430 OPAMUSEINTERNALSOLVER see option `--use-internal-solver'.
432 OPAMUSEOPENSSL force openssl use for hash computing.
434 OPAMUTF8 use UTF8 characters in output (one of one of always, never or
436 auto). By default `auto', which is determined from the locale).
437 OPAMUTF8MSGS use extended UTF8 characters (camels) in opam messages.
439 Implies OPAMUTF8. This is set by default on OSX only.
440 OPAMVALIDATIONHOOK if set, uses the `%{hook%}' command to validate an
442 opam repository update.
443 OPAMVERBOSE see option `--verbose'.
445 OPAMVERSIONLAGPOWER do not use.
447 OPAMWITHDOC see install option `--with-doc'.
449 OPAMWITHTEST see install option `--with-test.
451 OPAMWORKINGDIR see option `--working-dir'.
453 OPAMYES see options `--yes' and `--confirm-level`. OPAMYES has has
455 priority over OPAMNO and is ignored if OPAMCONFIRMLEVEL is set.
456 OPAMVAR_var overrides the contents of the variable var when
458 substituting `%{var}%` strings in `opam` files.
459 OPAMVAR_package_var overrides the contents of the variable package:var
461 when substituting `%{package:var}%` strings in `opam` files.
462
464 All scripts and programmatic invocations of opam should use `--cli' in
465 order to ensure that they work seamlessly with future versions of the
466 opam client. Additionally, blog posts or other documentation can
467 benefit, as it prevents information from becoming stale.
468 Although opam only supports roots (~/.opam/) for the current version,
470 it does provide backwards compatibility for its command-line interface.
471 Since CLI version support was only added in opam 2.1, use OPAMCLI to
473 select 2.0 support (as opam 2.0 will just ignore it), and `--cli=2.1'
474 for 2.1 (or later) versions, since an environment variable controlling
475 the parsing of syntax is brittle. To this end, opam displays a warning
476 if OPAMCLI specifies a valid version other than 2.0, and also if
477 `--cli=2.0' is specified.
478 The command-line version is selected by using the `--cli' option or the
480 OPAMCLI environment variable. `--cli' may be specified morethan once,
481 where the last instance takes precedence. OPAMCLI is only inspected if
482 `--cli' is not given.
483
485 As an exception to the following, the `exec' command returns 127 if the
486 command was not found or couldn't be executed, and the command's exit
487 value otherwise.
488 0 Success, or true for boolean queries.
490 1 False. Returned when a boolean return value is expected, e.g. when
492 running with --check, or for queries like opam lint.
493 2 Bad command-line arguments, or command-line arguments pointing to
495 an invalid context (e.g. file not following the expected format).
496 5 Not found. You requested something (package, version, repository,
498 etc.) that couldn't be found.
499 10 Aborted. The operation required confirmation, which wasn't given.
501 15 Could not acquire the locks required for the operation.
503 20 There is no solution to the user request. This can be caused by
505 asking to install two incompatible packages, for example.
506 30 Error in package definition, or other metadata files. Using
508 --strict raises this error more often.
509 31 Package script error. Some package operations were unsuccessful.
511 This may be an error in the packages or an incompatibility with
512 your system. This can be a partial error.
513 40 Sync error. Could not fetch some remotes from the network. This can
515 be a partial error.
516 50 Configuration error. Opam or system configuration doesn't allow
518 operation, and needs fixing.
519 60 Solver failure. The solver failed to return a sound answer. It can
521 be due to a broken external solver, or an error in solver
522 configuration.
523 99 Internal error. Something went wrong, likely due to a bug in opam
525 itself.
526 130 User interrupt. SIGINT was received, generally due to the user
528 pressing Ctrl-C.
529
531 See https://opam.ocaml.org/doc.
532
534 Vincent Bernardoff <vb@luminar.eu.org>
535 Raja Boujbel <raja.boujbel@ocamlpro.com>
536 Roberto Di Cosmo <roberto@dicosmo.org>
537 Thomas Gazagnaire <thomas@gazagnaire.org>
538 Louis Gesbert <louis.gesbert@ocamlpro.com>
539 Fabrice Le Fessant <Fabrice.Le_fessant@inria.fr>
540 Anil Madhavapeddy <anil@recoil.org>
541 Guillem Rieu <guillem.rieu@ocamlpro.com>
542 Ralf Treinen <ralf.treinen@pps.jussieu.fr>
543 Frederic Tuong <tuong@users.gforge.inria.fr>
544
546 Check bug reports at https://github.com/ocaml/opam/issues.
547Opam 2.1.5 OPAM(1)