# NAME

`bpkg-cfg-create` – create configuration

# SYNOPSIS

`bpkg cfg-create|create [options] [cfg-args]
bpkg cfg-create|create [options] --existing|-e`

`cfg-args = (module | cfg-var)...`

# DESCRIPTION

The `cfg-create` command creates a new `bpkg` configuration with the specified `build2` modules and configuration variables (the first form) or initializes one based on an existing build system configuration (the second form). The `bpkg` configuration itself is a build system configuration; see build system driver (`b(1)`) `create` meta-operation for details.

Unless the `--existing|-e` or `--wipe` option is specified, `cfg-create` expects the configuration directory to be empty or to not exist (in which case it will be created).

By default, the configuration created with the first form loads the `config`, `test`, `dist`, and `install` modules. However, additional modules and, if required, their configuration variables can be specified as the `cfg-create` arguments. For example:

    bpkg create cxx config.cxx=clang++ config.install.root=/usr/local

By default, `bpkg` appends `.config` to the names of the modules that you specify so that only their configurations are loaded. You can override this behavior by specifying the period (`.`) after the module name. You can also instruct `bpkg` to use the optional module load by prefixing the module name with the question mark (`?`). For example:

    bpkg create cxx. "?cli"

Configurations can be linked with each other to allow a package to be built in one configuration while its dependencies in one or more linked configurations. This can be used to create a "base" configuration with common dependencies that are shared between multiple configurations. This mechanism is also used to provide a host configuration that is used to build build-time dependencies.

Each configuration is assigned an automatically-generated UUID unless one is specified with the `--uuid` option. This UUID is used to check the integrity of configuration links. For convenience of referring to linked configurations, a configuration can also be assigned a name with the `--name` option.

A configuration also has a type specified with the `--type` option. Three predefined types are `target`, `host`, and `build2`. If the type is not specified explicitly, then `target` is assumed. When satisfying a dependency of one package on another, a linked configuration will only be considered if (1) it has the same type as the other configuration for run-time dependencies, (2) it has the `host` type for regular build-time dependencies, and (3) it has the `build2` type for build system module build-time dependencies. Note that a host configuration is a target configuration for the host machine. So to create a self-hosted configuration, use type `host`.

To link a configuration we use the `bpkg-cfg-link(1)` command. As a shortcut, host and build system module configurations can also be linked during the configuration creation with the `--host-config` and `--build2-config` options, respectively. If a build-time dependency is encountered in a configuration that has no linked configuration of a suitable type (`host` or `build2`, nor is itself of a suitable type), then a private host or build system module configuration named `host` or `build2`, respectively, is created automatically inside the configuration's `.bpkg/` subdirectory.

# CFG-CREATE OPTIONS

`--directory`|`-d` `dir`
  Create the configuration in `dir` rather than in the current working directory.
`--existing`|`-e`
  Initialize a `bpkg` configuration based on an existing build system configuration.
`--wipe`
  Wipe the configuration directory clean before creating the new configuration. For safety, this option requires that you specify the configuration directory explicitly with `--directory|-d`.
`--host-config` `dir`
  Link the specified host configuration with the configuration being created as if by running the `bpkg-cfg-link(1)` command.
`--no-host-config`
  Ignore any specified `--host-config` options.
`--build2-config` `dir`
  Link the specified build system module configuration with the configuration being created as if by running the `bpkg-cfg-link(1)` command.
`--no-build2-config`
  Ignore any specified `--build2-config` options.
`--name` `name`
  The name of the configuration being created. If this configuration is linked with another configuration using `bpkg-cfg-link(1)`, this name will be used as the link name unless overridden. By default the configuration is created unnamed.
`--type` `type`
  The type of the configuration being created. By default, configuration of type `target` is created.
`--uuid` `uuid`
  Use the specified UUID as the configuration id instead of generating one automatically.

# COMMON OPTIONS

The common options are summarized below with a more detailed description available in `bpkg-common-options(1)`.

`-v`
  Print essential underlying commands being executed.
`-V`
  Print all underlying commands being executed.
`--quiet`|`-q`
  Run quietly, only printing error messages.
`--verbose` `level`
  Set the diagnostics verbosity to `level` between 0 and 6.
`--stdout-format` `format`
  Representation format to use for printing to `stdout`.
`--jobs`|`-j` `num`
  Number of jobs to perform in parallel.
`--no-result`
  Don't print informational messages about the outcome of performing a command or some of its parts.
`--structured-result` `fmt`
  Write the result of performing a command in a structured form.
`--progress`
  Display progress indicators for long-lasting operations, such as network transfers, building, etc.
`--no-progress`
  Suppress progress indicators for long-lasting operations, such as network transfers, building, etc.
`--diag-color`
  Use color in diagnostics.
`--no-diag-color`
  Don't use color in diagnostics.
`--build` `path`
  The build program to be used to build packages.
`--build-option` `opt`
  Additional option to be passed to the build program.
`--fetch` `path`
  The fetch program to be used to download resources (packages, repository metadata, etc).
`--fetch-option` `opt`
  Additional option to be passed to the fetch program.
`--fetch-timeout` `sec`
  The fetch and fetch-like (for example, `git`) program timeout.
`--offline`
  Do not attempt to download resources (packages, repository metadata, etc), instead taking them from the local fetch cache if available and failing otherwise.
`--no-fetch-cache`
  Disable local caching of downloaded resources (packages, repository metadata, etc).
`--fetch-cache` `mode`
  Comma-separated list of local fetch cache modes.
`--fetch-cache-path` `dir`
  The directory of the local fetch cache.
`--fetch-cache-session` `id`
  The local fetch cache session.
`--pkg-proxy` `url`
  HTTP proxy server to use when fetching package manifests and archives from remote `pkg` repositories.
`--git` `path`
  The git program to be used to fetch git repositories.
`--git-option` `opt`
  Additional common option to be passed to the git program.
`--sha256` `path`
  The sha256 program to be used to calculate SHA256 sums.
`--sha256-option` `opt`
  Additional option to be passed to the sha256 program.
`--tar` `path`
  The tar program to be used to extract package archives.
`--tar-option` `opt`
  Additional option to be passed to the tar program.
`--openssl` `path`
  The openssl program to be used for crypto operations.
`--openssl-option` `opt`
  Additional option to be passed to the openssl program.
`--auth` `type`
  Types of repositories to authenticate.
`--trust` `fingerprint`
  Trust repository certificate with a SHA256 `fingerprint`.
`--trust-yes`
  Assume the answer to all authentication prompts is `yes`.
`--trust-no`
  Assume the answer to all authentication prompts is `no`.
`--git-capabilities` `up`=`pc`
  Protocol capabilities (`pc`) for a `git` repository URL prefix (`up`).
`--pager` `path`
  The pager program to be used to show long text.
`--pager-option` `opt`
  Additional option to be passed to the pager program.
`--options-file` `file`
  Read additional options from `file`.
`--default-options` `dir`
  The directory to load additional default options files from.
`--no-default-options`
  Don't load default options files.
`--keep-tmp`
  Don't remove the `bpkg`'s temporary directory at the end of the command execution and print its path at the verbosity level 2 or higher.

# DEFAULT OPTIONS FILES

See `bpkg-default-options-files(1)` for an overview of the default options files. For the `cfg-create` command the search start directory is the parent directory of the new configuration. The following options files are searched for in each directory and, if found, loaded in the order listed:

    bpkg.options
    bpkg-cfg-create.options

The following `cfg-create` command options cannot be specified in the default options files:

    --directory|-d
    --wipe

# BUGS

Send bug reports to the users@build2.org mailing list.