Ubuntu Manpage: just-lock-config - The format of the input configuration used by just-lock(1)

Provided by: justbuild_1.5.1-1ubuntu2_amd64

NAME

       just-lock-config - The format of the input configuration used by just-lock(1)

DESCRIPTION

In order for the just-lock(1) tool to generate a repository configuration file usable by the just-mr(1)
launcher, it requires its own configuration file describing how that resulting configuration should be
obtained.

The file is read as JSON. Any other serialization describing the same JSON object is equivalent. It is
assumed that in JSON objects keys occur at most once; it is implementation defined how repetitions of the
same key are treated.

Repository import description objects
One of the main functionalities of the just-lock(1) tool is to import dependencies from other Just
projects, as described in their repositories configuration file. From each such project, one or more
repositories can be imported (with their respective transitive dependencies). A repository import
description is a JSON object describing one such repository to be imported.

The following fields are supported:

• "repo" has a string value defining the name of the repository to be imported. This entry is optional.

• "alias" has a string value defining the new name under which the imported repository should be found in
the output configuration. This entry is optional. If not provided, the value for the key "repo" must
exist and its value is used instead.

• "map" has as value a JSON object with string key-value pairs defining a mapping between repository
names that would be brought in by this import (possibly transitively) and already imported
repositories. This mapping can be used to avoid additional duplications of repositories from multiple
imports. This entry is optional.

• "pragma" has as value a JSON object. This entry is optional.
If the object contains the {"absent": true} object, it informs that the imported repository and all
transitive repositories imported as a consequence should have the {"absent": true} pragma added to their
description.
If the object contains the {"to_git": true} object, it informs that all "file"-type repositories brought
in as a consequence of this import should have the {"to_git": true} pragma added to their description.

Source objects
A source provides information about an operation that the just-lock(1) tool can perform in order to
extend an initial repository description stub and obtain the output repository configuration. In most
cases, this operation involves importing repositories from other Just projects, but a more general
operation exists as well.

Sources are given as JSON objects for which the string value to the mandatory key "source" defines a
supported type. Each source type informs which other fields are available. Currently, the supported
source types are "git", "file", "archive", "git tree", and "generic".

"git"
It defines an import operation of one or more dependencies from a Just project under Git version control.

The following fields are supported:

• "source" defines the current source type. This entry is mandatory.

• "repos" has as value a JSON list where each entry is a repository import description. This entry is
mandatory. An empty list is treated as if the current source object is missing.

• "url" has a string value defining the URL of the Git repository. This entry is mandatory.

• "branch" has a string value providing the name of the branch to consider from the Git repository. This
entry is mandatory.

• "commit" has a string value providing the hash of the commit to be used. This entry is optional. If
provided, it has to be specified in hex encoding and it must be a commit in the branch specified by the
corresponding field. If not provided, the HEAD commit of that branch is used.

• "mirrors" has as value a JSON list of strings defining alternative locations for the Git repository to
be used if the given URL fails to provide it. This entry is optional.

• "inherit env" has as value a JSON list which will be recorded as the value for the "inherit env" key in
the output configuration for all imported "git"-type repositories (see just-mr-repository-config(5)).
This entry is optional.

• "as plain" has a boolean value. If the field evaluates to true, it informs just-lock(1) to consider
the foreign repository configuration to be the canonical one for a single repository. This can be
useful if the Git repository does not have a repository configuration or should be imported as-is,
without dependencies. This entry is optional.

• "pragma" has as value a JSON object. If "as plain" evaluates to true, if a pragma object with key
"special" is provided, it will unconditionally be forwarded to the "pragma" object of the repository
being imported for this source. This entry is optional.

• "config" has a string value defining the relative path of the foreign repository configuration file to
be considered from the Git repository. This entry is optional. If not provided and the "as plain"
field does not evaluate to true, just-lock(1) will search for a configuration file in the same
locations as just-mr(1) does when invoked with --norc in the root directory of the Git repository.

"file"
It defines an import operation of one or more dependencies from a Just project present as a local
checkout.

The following fields are supported:

• "source" defines the current source type. This entry is mandatory.

• "repos" has as value a JSON list where each entry is a repository import description. This entry is
mandatory. An empty list is treated as if the current source object is missing.

• "path" has a string value defining the path to the local checkout. This entry is mandatory.

"archive"
It defines an import operation of one or more dependencies from an archived Just project.

The following fields are supported:

• "source" defines the current source type. This entry is mandatory.

• "repos" has as value a JSON list where each entry is a repository import description. This entry is
mandatory. An empty list is treated as if the current source object is missing.

• "fetch" has a string value defining the URL of the archive. This entry is mandatory.

• "type" has a string value providing a supported archive type. This entry is mandatory. Available
values are:

• "tar": a tarball archive

• "zip": a zip-like archive

• "content" has a string value providing the hash of the archive. This entry is optional. If provided,
it has to be specified in hex encoding and it must be the Git blob identifier of the archive content.
If not provided, it is computed based on the fetched archive.

• "subdir" has a string value providing the relative path to the sources root inside the archive. This
entry is optional. If missing, the root directory of the unpacked archive is used.

• "sha256"

• "sha512" have string values providing respective checksums for the archive. These entries are
optional. If provided, they have to be specified in hex encoding and they will be checked for the
fetched archive.

• "mirrors" has as value a JSON list of strings defining alternative locations for the archive to be used
if the given URL fails to provide it. This entry is optional.

• "as plain" has a boolean value. If the field evaluates to true, it informs just-lock(1) to consider
the foreign repository configuration to be the canonical one for a single repository. This can be
useful if the archived repository does not have a configuration file or should be imported as-is,
without dependencies. This entry is optional.

• "config" has a string value defining the relative path of the foreign repository configuration file to
be considered from the unpacked archive root. This entry is optional. If not provided and the "as
plain" field does not evaluate to true, just-lock(1) will search for a configuration file in the same
locations as just-mr(1) does when invoked with --norc in the root directory of the unpacked archive.

"git tree"
It defines an import operation of one or more dependencies from a Just project given as the result of
running a command. This can be used, for example, to import projects found under a version control
system other than Git.

The following fields are supported:

• "source" defines the current source type. This entry is mandatory.

• "repos" has as value a JSON list where each entry is a repository import description. This entry is
mandatory. An empty list is treated as if the current source object is missing.

• "cmd" provides a list of strings forming a command that, when executed in an empty directory (anywhere
in the file system), creates the tree of the source Just project to use for the import. This entry is
optional. One and only one of the fields "cmd" and "cmd gen" must be provided.

• "cmd gen" provides a list of strings forming a command that, when executed in an empty directory
(anywhere in the file system), prints to stdout a string giving a JSON serialization of a valid input
for the field "cmd" to be used. This entry is optional. One and only one of the fields "cmd" and "cmd
gen" must be provided.

• "env" provides a map of envariables to be set for executing the command and the command generator, if
given. This entry is optional.

• "inherit env" provides a list of variables to be inherited from the environment just-lock is called
within, if set there. This entry is optional.

• "subdir" has a string value providing the relative path to the sources root inside the generated tree.
This entry is optional. If missing, the root directory of the generated tree is considered.

"generic"
It defines a liberal way to modify a just-mr configuration via a user-provided command.

The following fields are supported:

• "source" defines the current source type. This entry is mandatory.

• "cmd" provides a list of strings forming a command that accepts a string as input from stdin containing
a serialized just-mr configuration and outputs a string to stdout containing a serialized just-mr
configuration. This entry is mandatory.

• cwd provides the path to the directory in which the command will be run. If it is relative, it will be
taken relative to the current working directory. This entry is optional. If missing, "." is used.

• "env" provides a map of envariables to be set for executing the command. This entry is optional.

• "inherit env" provides a list of variables to be inherited from the environment just-lock is called
within, if set there. This entry is optional.

The just-lock configuration format
The configuration format is structured as a JSON object. It is a superset of the
just-mr-repository-config(5), which is extended by two additional fields. Specifically, the following
fields are supported:

• "main" has the syntax and semantics as described in just-mr-repository-config(5).

• "repositories" has the syntax and semantics as described in just-mr-repository-config(5).

• "imports" is a JSON list with each entry a source object.

• "keep" is a JSON list of strings defining the global names of repositories to be kept, together with
the "main" repository, in the output configuration during the deduplication step of just-lock(1).

Additional keys
Any JSON object described in this format might have additional keys besides the ones mentioned. The
current strategy of just-lock(1) is to accept and ignore them. Users should be aware that future
versions of this format might give specific meanings to these extra keys.

NAME

DESCRIPTION

See also