# NAME

`bpkg-cfg-link` – link configuration

# SYNOPSIS

`bpkg cfg-link [options] dir`

# DESCRIPTION

The `cfg-link` command links the specified `bpkg` configuration with the current configuration. Note that it also establishes an implicit backlink from the specified to the current configuration. See `bpkg-cfg-create(1)` for background on linked configurations. To unlink previously linked configurations use `bpkg-cfg-unlink(1)`.

The linked configurations are normally referred to using names when specified on the `bpkg` command line. Unless overridden with the `--name` option, the original configuration name is used to name the link. If the link is unnamed, then it can be referred to using the numeric id that is automatically assigned when establishing the link or using the configuration UUID.

If the specified configuration path is relative, then it is rebased relative to the current configuration directory. This way, when the linked configurations are moved around together, the stored relative paths remain valid. If the specified directory path is absolute, then it is stored as absolute unless the `--relative` option is specified in which case it is also rebased relative to the current configuration directory.

# CFG-LINK OPTIONS

`--name` `name`
  Alternative link name. If this option is not specified, then the configuration name is used as the link name (see `bpkg-cfg-create(1)` for details).
`--relative`
  Rebase the absolute linked configuration path relative to the current configuration directory.
`--directory`|`-d` `dir`
  Assume configuration is in `dir` rather than in the current working directory.

# 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-link` command the search start directory is the configuration directory. The following options files are searched for in each directory and, if found, loaded in the order listed:

    bpkg.options
    bpkg-cfg-link.options

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

    --directory|-d

# BUGS

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