OPAM-LINT

Section: Opam Manual (1)
Updated:
Index Return to Main Contents
 

NAME

opam-lint - Checks and validate package description ('opam') files.  

SYNOPSIS

opam lint [OPTION]... [FILES]...  

DESCRIPTION

Given an opam file, performs several quality checks on it and outputs recommendations, warnings or errors on stderr.  

ARGUMENTS

FILES
Name of the opam files to check, or directory containing them. Current directory if unspecified
 

OPTIONS

--check-upstream
Check upstream, archive availability and checksum(s)
--normalise
Output a normalised version of the opam file to stdout
--package=PKG
Lint the current definition of the given package instead of specifying an opam file directly.
-s, --short
Only print the warning/error numbers, space-separated, if any
-W WARNS, --warnings=WARNS
Select the warnings to show or hide. WARNS should be a concatenation of +N, -N, +N..M, -N..M to respectively enable or disable warning or error number N or all warnings with numbers between N and M inclusive. All warnings are enabled by default, unless WARNS starts with +, which disables all but the selected ones.
 

LINT CODES

W20: Field 'opam-version' refers to the patch version of opam, it should be of the form MAJOR.MINOR: "2.0"

E21: Field 'opam-version' doesn't match the current version, validation may not be accurate: "2.0"

E22: Some fields are present but empty; remove or fill them: ""

E23: Missing field 'maintainer'

E24: Field 'maintainer' has the old default value

W25: Missing field 'authors'

W26: No field 'install', but a field 'remove': install instructions probably part of 'build'. Use the 'install' field or a .install file

E28: Unknown package flags found: ""

E29: Package dependencies mention package variables: ""

E31: Fields 'depends' and 'depopts' refer to the same package names: ""

E32: Field 'ocaml-version:' and variable 'ocaml-version' are deprecated, use a dependency towards the 'ocaml' package instead for availability, and the 'ocaml:version' package variable for scripts

E33: Field 'os' is deprecated, use 'available' and the 'os' variable instead

E34: Field 'available:' contains references to package-local variables. It should only be determined from global configuration variables: ""

W35: Missing field 'homepage'

W36: Missing field 'bug-reports'

W37: Missing field 'dev-repo'

E39: Command 'make' called directly, use the built-in variable instead

W41: Some packages are mentioned in package scripts or features, but there is no dependency or depopt toward them: ""

E42: The 'dev-repo:' field doesn't use version control. You should use URLs of the form "git://", "git+https://", "hg+https://"...

E43: Conjunction used in 'conflicts:' field. Only '|' is allowed

W44: The 'plugin' package flag is set but the package name doesn't begin with 'opam-'

E45: Unclosed variable interpolations in strings: ""

E46: Package is flagged "conf" but has source, install or remove instructions

W47: Synopsis (or description first line) should start with a capital and not end with a dot

W48: The fields 'build-test:' and 'build-doc:' are deprecated, and should be replaced by uses of the 'with-test' and 'with-doc' filter variables in the 'build:' and 'install:' fields, and by the newer 'run-test:' field

W49: The following URLs don't use version control but look like version control URLs: ""

W50: The 'post' flag doesn't make sense with build or optional dependencies

E51: The behaviour for negated dependency flags 'build' or 'post' is unspecified

E52: Package is needlessly flagged "light-uninstall", since it has no remove instructions

E53: Mismatching 'extra-files:' field: ""

W54: External dependencies should not contain spaces nor empty string: ""

E55: Non-normalised OS or arch string being tested: ""

W56: It is discouraged for non-compiler packages to use 'setenv:'

E57: Synopsis and description must not be both empty

W58: Found variable, predefined one

W59: url don't contain a checksum

E60: Upstream check failed: ""

W61: `with-test` variable in `run-test` is out of scope, it will be ignored

W62: License doesn't adhere to the SPDX standard, see https://spdx.org/licenses/: ""  

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 $(b,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, builtin-dummy-z3-solver, 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. As source directory is copied as it is, it it isn't clean it may result on a opam build failure.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'.

OPAMDEBUGSECTIONS if set, limits debug messages to the space-separated list of sections. Sections can optionally have a specific debug level (for example, CLIENT:2 or CLIENT CUDF:2, but otherwise use `--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 combination of `--locked` and `--lock-suffix` options

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.

OPAMDROPWORKINGDIR overrides packages previously updated with --working-dir on update. Without this variable set, opam would keep them unchanged unless explicitely named on the command-line.

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`).

OPAMRETRIES 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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
ARGUMENTS
OPTIONS
LINT CODES
COMMON OPTIONS
ENVIRONMENT VARIABLES
EXIT STATUS
FURTHER DOCUMENTATION
AUTHORS
BUGS

This document was created by man2html, using the manual pages.
Time: 01:02:02 GMT, December 06, 2019