conan lock add

$ conan lock add -h
WARN: Downgrading cache from Conan 2.3.2 to 2.0.17
usage: conan lock add [-h] [-v [V]] [--requires REQUIRES]
                      [--build-requires BUILD_REQUIRES]
                      [--python-requires PYTHON_REQUIRES]
                      [--lockfile-out LOCKFILE_OUT] [--lockfile LOCKFILE]

Add requires, build-requires or python-requires to an existing or new
lockfile. The resulting lockfile will be ordered, newer versions/revisions
first. References can be supplied with and without revisions like "--
requires=pkg/version", but they must be package references, including at least
the version, and they cannot contain a version range.

options:
  -h, --help            show this help message and exit
  -v [V]                Level of detail of the output. Valid options from less
                        verbose to more verbose: -vquiet, -verror, -vwarning,
                        -vnotice, -vstatus, -v or -vverbose, -vv or -vdebug,
                        -vvv or -vtrace
  --requires REQUIRES   Add references to lockfile.
  --build-requires BUILD_REQUIRES
                        Add build-requires to lockfile
  --python-requires PYTHON_REQUIRES
                        Add python-requires to lockfile
  --lockfile-out LOCKFILE_OUT
                        Filename of the created lockfile
  --lockfile LOCKFILE   Filename of the input lockfile

The conan lock add command is able to add a package version to an existing or new lockfile requires, build_requires or python_requires.

For example, the following is able to create a lockfile (by default, named conan.lock):

$ conan lock add --requires=pkg/1.1 --build-requires=tool/2.2 --python-requires=mypytool/3.3
Generated lockfile: ...conan.lock

$cat conan.lock
{
    "version": "0.5",
    "requires": [
        "pkg/1.1"
    ],
    "build_requires": [
        "tool/2.2"
    ],
    "python_requires": [
        "mypytool/3.3"
    ]
}

The conan lock add command also allows to provide an existing lockfile as an input, and it will add the arguments to the existing lockfile, maintaining the package versions sorted:

$ conan lock add --build-requires=tool/2.3 --lockfile=conan.lock
Using lockfile: '.../conan.lock'
Generated lockfile: .../conan.lock

$ cat conan.lock
{
    "version": "0.5",
    "requires": [
        "pkg/1.1"
    ],
    "build_requires": [
        "tool/2.3",
        "tool/2.2"
    ],
    "python_requires": [
        "mypytool/3.3"
    ]
}

The conan lock add command does not perform any checking on the lockfile, the packages, the existence of packages, the existence of package versions, or the existence of those packages in a given dependency graph, it is a basic manipulation of the json information. When that lockfile is applied to resolve a dependency graph, it is possible that the added versions do not exist, or do not resolve for the conanfile.py recipes defined version ranges.

Moreover, the list of versions is still sorted. Adding an older version like tool/2.1 to the previous lockfile won’t make that version being used automatically if the recipes contain the version range tool/[>=2.0 <3], because the tool/2.2 version is listed there and the range will resolve to it, not to the older tool/2.1.

Note that a lockfile created with conan lock add can be incomplete and not contain all necessary locked versions that a full dependency graph would need. For those cases, recall that the --lockfile-partial argument can be applied. Note also that if a conan.lock file exist in the current folder, Conan commands like conan install will automatically use it. Please have a look to the lockfiles tutorial.

If explicitly adding revisions, please recall that the revisions are timestamp sorted. If more than one revision exists in the lockfile, it is mandatory to provide the timestamps of those revisions, so the sorting makes sense, which can be done with:

$ conan lock add --requires=pkg/1.1#revision%timestamp

Warning

• It is forbidden to manually manipulate a Conan lockfile, changing the strict sorting of references, and that could result in any arbitrary undefined behavior.

• Recall that it is not possible to conan lock add a version range. The version might be not fully complete (like not providing the revision), but it must be an exact version.

Note

Best practices

This command will not be necessary in many situations. The existing conan install, conan create, conan lock, conan export, conan graph commands can directly update or produce new lockfiles with the new information of the packages they are creating, and those new or updated lockfiles can be used to continue with the processing.