opam-admin-compare-versions - Man Page

Compare two package versions

Synopsis

opam admin compare-versions [OPTION]… V0 V1

This command compares 2 package versions. By default it outputs 'V0 OP V1' to the console with OP in {<,>,=} such that the equation holds. When an operator is supplied, the output is suppressed and the result of the comparison is checked against the provided operator: the command exits 0 if the comparison holds, and 1 otherwise. For example:

$ opam admin compare-versions 0.0.9 0.0.10
0.0.9 < 0.0.10

$ opam admin compare-versions 0.0.9 --lt 0.0.10
[0]

$ opam admin compare-versions 0.0.9 --eq 0.0.10
[1]

Arguments

V0 (required): Package version to compare
V1 (required): Package version to compare

Options

--eq: assert V0 = V1
--geq: assert V0 >= V1
--gt: assert V0 > V1
--leq: assert V0 <= V1
--lt: assert V0 < V1
--neq: assert V0 != V1

Common Options

These options are common to all commands.

--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.
--version: Show version information.

Environment

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.

OPAMASSUMEDEPEXTS see option `--assume-depexts'.

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.

OPAMBUILDDOC Removed in 2.1.

OPAMBUILDTEST Removed in 2.1.

OPAMCLI see option `--cli'.

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

OPAMCONFIRMLEVEL see option `--confirm-level`. OPAMCONFIRMLEVEL has priority over OPAMYES and OPAMNO.

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

OPAMCUDFTRIM controls the filtering of unrelated packages during CUDF preprocessing.

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'.

OPAMDIGDEPTH defines how aggressive the lookup for conflicts during CUDF preprocessing is.

OPAMDOWNLOADJOBS sets the maximum number of simultaneous downloads.

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

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 and reinstall.

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

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

OPAMINPLACEBUILD see option `--inplace-build'.

OPAMJOBS sets the maximum number of parallel workers to run.

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

OPAMKEEPBUILDDIR see install option `--keep-build-dir'.

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.

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.

OPAMMERGEOUT merge process outputs, stderr on stdout.

OPAMNO answer no to any question asked, see options `--no` and `--confirm-level`. OPAMNO is ignored if either OPAMCONFIRMLEVEL or OPAMYES is set.

OPAMNOAGGREGATE with `opam admin check', don't aggregate packages.

OPAMNOASPCUD Deprecated.

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

OPAMNOCHECKSUMS enables option --no-checksums when available.

OPAMNODEPEXTS disables system dependencies handling, see option `--no-depexts'.

OPAMNOENVNOTICE Internal.

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.

OPAMPREPRO set this to false to disable CUDF preprocessing. Less efficient, but might help debugging solver issue.

OPAMREPOSITORYTARRING internally store the repositories as tar.gz files. This can be much faster on filesystems that don't cope well with scanning large trees but have good caching in /tmp. However this is slower in the general case.

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

OPAMRETRIES sets the number of tries before failing downloads.

OPAMREUSEBUILDDIR see option `--reuse-build-dir'.

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.

OPAMSOLVERALLOWSUBOPTIMAL (default `true') allows some solvers to still return a solution when they reach timeout; while the solution remains assured to be consistent, there is no guarantee in this case that it fits the expected optimisation criteria. If `true', opam willcontinue with a warning, if `false' a timeout is an error. Currently only the builtin-z3 backend handles this degraded case.

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.

OPAMSOLVERTOLERANCE changes the tolerance towards the solver choosing an unoptimized solution (i.e. might pull outdated packages). Typical values range from 0.0 (best solution known to the solver) to 1.0 (unoptimized solution). Default is 0.0. This option is useful in case the solver can't find a solution in a reasonable time (see $OPAMSOLVERTIMEOUT). Note that all solvers may not support this option.

OPAMSTATS Removed in 2.4.

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

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 Removed in 2.2.

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 macOS only.

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

OPAMVERBOSE see option `--verbose'.

OPAMVERBOSEON see option --verbose-on

OPAMVERSIONLAGPOWER do not use.

OPAMWITHDEVSETUP see install option `--with-dev-setup'.

OPAMWITHDOC see install option `--with-doc'.

OPAMWITHTEST see install option `--with-test.

OPAMWORKINGDIR see option `--working-dir'.

OPAMYES see options `--yes' and `--confirm-level`. OPAMYES has priority over OPAMNO and is ignored if OPAMCONFIRMLEVEL is set.

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.

CLI Version

All scripts and programmatic invocations of opam should use `--cli' in order to ensure that they work seamlessly with future versions of the opam client. Additionally, blog posts or other documentation can benefit, as it prevents information from becoming stale.

Although opam only supports roots (~/.opam/) for the current version, it does provide backwards compatibility for its command-line interface.

Since CLI version support was only added in opam 2.1, use OPAMCLI to select 2.0 support (as opam 2.0 will just ignore it), and `--cli=2.1' for 2.1 (or later) versions, since an environment variable controlling the parsing of syntax is brittle. To this end, opam displays a warning if OPAMCLI specifies a valid version other than 2.0, and also if `--cli=2.0' is specified.

The command-line version is selected by using the `--cli' option or the OPAMCLI environment variable. `--cli' may be specified morethan once, where the last instance takes precedence. OPAMCLI is only inspected if `--cli' is not given.

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.
0: on success.
123: on indiscriminate errors reported on standard error.
124: on command line parsing errors.
125: on unexpected internal errors (bugs).