# NAME

`bpkg-common-options` – details on common options

# SYNOPSIS

`bpkg [common-options] ...`

# DESCRIPTION

The common options control behavior that is common to all or most of the `bpkg` commands. They can be specified either before the command or after, together with the command-specific options.

# COMMON OPTIONS

`-v`
  Print essential underlying commands being executed. This is equivalent to `--verbose 2`.
`-V`
  Print all underlying commands being executed. This is equivalent to `--verbose 3`.
`--quiet`|`-q`
  Run quietly, only printing error messages. This is equivalent to `--verbose 0`.
`--verbose` `level`
  Set the diagnostics verbosity to `level` between 0 and 6. Level 0 disables any non-error messages while level 6 produces lots of information, with level 1 being the default. The following additional types of diagnostics are produced at each level:
  1. High-level information messages.
  2. Essential underlying commands being executed.
  3. All underlying commands being executed.
  4. Information that could be helpful to the user.
  5. Information that could be helpful to the developer.
  6. Even more detailed information.
`--stdout-format` `format`
  Representation format to use for printing to `stdout`. Valid values for this option are `lines` (default) and `json`. See the JSON OUTPUT section below for details on the `json` format.
`--jobs`|`-j` `num`
  Number of jobs to perform in parallel. If this option is not specified or specified with the `0` value, then the number of available hardware threads is used. This option is also propagated when performing build system operations such as `update`, `test`, etc.
`--no-result`
  Don't print informational messages about the outcome of performing a command or some of its parts. Note that if this option is specified, then for certain long-running command parts progress is displayed instead, unless suppressed with `--no-progress`.
`--structured-result` `fmt`
  Write the result of performing a command in a structured form. In this mode, instead of printing to `stderr` informational messages about the outcome of performing a command or some of its parts, `bpkg` writes to `stdout` a machine-readable result description in the specified format. Not all commands support producing structured result and valid `fmt` values are command-specific. Consult the command documentation for details.
`--progress`
  Display progress indicators for long-lasting operations, such as network transfers, building, etc. If printing to a terminal the progress is displayed by default for low verbosity levels. Use `--no-progress` to suppress.
`--no-progress`
  Suppress progress indicators for long-lasting operations, such as network transfers, building, etc.
`--diag-color`
  Use color in diagnostics. If printing to a terminal the color is used by default provided the terminal is not dumb. Use `--no-diag-color` to suppress.
`--no-diag-color`
  Don't use color in diagnostics.
`--build` `path`
  The build program to be used to build packages. This should be the path to the build2 `b` executable. You can also specify additional options that should be passed to the build program with `--build-option`.

  If the build program is not explicitly specified, then `bpkg` will by default use `b` plus an executable suffix if one was specified when building `bpkg`. So, for example, if `bpkg` name was set to `bpkg-1.0`, then it will look for `b-1.0`.

`--build-option` `opt`
  Additional option to be passed to the build program. See `--build` for more information on the build program. Repeat this option to specify multiple build options.
`--fetch` `path`
  The fetch program to be used to download resources (packages, repository metadata, etc). Currently, `bpkg` recognizes `curl`, `wget`, and `fetch`. Note that the last component of `path` must contain one of these names as a substring in order for `bpkg` to recognize which program is being used. You can also specify additional options that should be passed to the fetch program with `--fetch-option`.

  If the fetch program is not specified, then `bpkg` will try to discover if one of the above programs is available and use that. Currently, `bpkg` has the following preference order: `curl`, `wget`, and `fetch`.

`--fetch-option` `opt`
  Additional option to be passed to the fetch program. See `--fetch` for more information on the fetch program. Repeat this option to specify multiple fetch options.
`--fetch-timeout` `sec`
  The fetch and fetch-like (for example, `git`) program timeout. While the exact semantics of the value depends on the program used, at a minimum it specifies in seconds the maximum time that can be spent without any network activity.

  Specifically, it is translated to the `--max-time` option for `curl` and to the `--timeout` option for `wget` and `fetch`. For `git` over HTTP/HTTPS this semantics is achieved using the `http.lowSpeedLimit`=1 `http.lowSpeedTime`=sec configuration values (the `git://` and `ssh://` protocols currently do not support timeouts).

  See `--fetch` and `--git` for more information on the fetch programs.

`--offline`
  Do not attempt to download resources (packages, repository metadata, etc), instead taking them from the local fetch cache if available and failing otherwise. Note that no up-to-date checks of cached repository metadata are performed when offline. This mode can also be enabled by setting the `BPKG_FETCH_CACHE` environment variable, see the `--fetch-cache` option description for details.
`--no-fetch-cache`
  Disable local caching of downloaded resources (packages, repository metadata, etc). By default these are cached in a persistent local cache. For the location of the cache, see the `--fetch-cache-path` option. The local cache can also be disabled by setting the `BPKG_FETCH_CACHE` environment variable to `0` or `false`.

  Note that if this option or environment variable is specified during the configuration creation (`cfg-create(1)`), its value is saved in the configuration and used as the default in the subsequent `bpkg` commands involving this configuration.

`--fetch-cache` `mode`
  Comma-separated list of local fetch cache modes. The currently recognized modes are `src`/`no-src`, `trust`/`no-trust`, and `offline`, with their semantics described below. The local cache mode can also be specified with the `BPKG_FETCH_CACHE` environment variable. Its value has the same format as this option.

  The `src`/`no-src` mode enables/disables sharing of cached source directories for dependencies. If disabled, then private copies are made in the build configuration directories. The default for `bpkg` is to disable sharing, which is also the behavior if the fetch cache is disabled (`--no-fetch-cache`).

  The `trust`/`no-trust` mode enabled/disables caching of the repository authentication answers given by the user. The default is to enable caching. See `bpkg-repository-signing(1)` for background on repository authentication.

  The `offline` mode is equivalent to specifying the `--offline` option.

  Note that if this option and/or environment variable is specified during the configuration creation (`cfg-create(1)`), the effective `src` and `trust` modes are saved in the configuration and used as the defaults in the subsequent `bpkg` commands involving this configuration.

`--fetch-cache-path` `dir`
  The directory of the local fetch cache. Ideally, this directory should be on the same filesystem (UNIX) or volume (Windows) as the build configuration directories that will rely on this cache to allow the use of hard links. Failing that, the implementation will resort to copying, which may result in sub-optimal performance and inability to accurately track usage. The location of the cache can also be specified with the `BPKG_FETCH_CACHE_PATH` environment variable.

  If not explicitly specified, then the cache location is split across two directories: The non-precious data (packages and repository metadata) is placed into `$XDG_CACHE_HOME/build2/` or `$HOME/.cache/build2/` on UNIX and into `%LOCALAPPDATA%\build2\cache\` on Windows. The semi-precious data (shared source directories) is placed into the `.build2/cache/` subdirectory of the user's home directory on all platforms. You can safely remove the non-precious data and while you won't lose any information if the semi-precious data is removed, you may end up with broken builds that will require manual repair.

  Note that if the cache location is explicitly specified with this option or the environment variable, then both types of data are placed into the specified directory. Note also that while there is currently no way to impose a size limit on the cache, outdated cache entries are periodically removed.

`--fetch-cache-session` `id`
  The local fetch cache session. Specifying the same session id across multiple `bpkg` invocations allows eliminating repeated up-to-date checks of repository metadata. Any value, such as UUID, that is guaranteed not to clash with previous sessions can be used as a session id. The cache session can also be specified with the `BPKG_FETCH_CACHE_SESSION` environment variable.
`--pkg-proxy` `url`
  HTTP proxy server to use when fetching package manifests and archives from remote `pkg` repositories. If specified, the proxy `url` must be in the `http://host[:port]` form. If `port` is omitted, 80 is used by default.

  Note that to allow caching, the proxied `https://` URLs are converted to `http://` in order to prevent the fetch program from tunneling (which is the standard approach for proxying HTTPS). If both HTTP and HTTPS repositories are used, it is assumed that the proxy server can figure out which URLs need to be converted back to `https://` based on the request information (for example, host name). For security, this mechanism should only be used with signed repositories or when the proxy is located inside a trusted network.

`--git` `path`
  The git program to be used to fetch git repositories. You can also specify additional options that should be passed to the git program with `--git-option`.

  If the git program is not explicitly specified, then `bpkg` will use `git` by default.

`--git-option` `opt`
  Additional common option to be passed to the git program. Note that the common options are the ones that precede the `git` command. See `--git` for more information on the git program. Repeat this option to specify multiple git options.
`--sha256` `path`
  The sha256 program to be used to calculate SHA256 sums. Currently, `bpkg` recognizes `sha256`, `sha256sum`, and `shasum`. Note that the last component of `path` must contain one of these names as a substring in order for `bpkg` to recognize which program is being used. You can also specify additional options that should be passed to the sha256 program with `--sha256-option`.

  If the sha256 program is not specified, then `bpkg` will try to discover if one of the above programs is available and use that. Currently, `bpkg` has the following preference order: `sha256`, `sha256sum`, and `shasum`.

`--sha256-option` `opt`
  Additional option to be passed to the sha256 program. See `--sha256` for more information on the sha256 program. Repeat this option to specify multiple sha256 options.
`--tar` `path`
  The tar program to be used to extract package archives. For example, `gtar` or `bsdtar`. You can also specify additional options that should be passed to the tar program with `--tar-option`. If the tar program is not explicitly specified, then `bpkg` will use `tar` by default.
`--tar-option` `opt`
  Additional option to be passed to the tar program. See `--tar` for more information on the tar program. Repeat this option to specify multiple tar options.
`--openssl` `path`
  The openssl program to be used for crypto operations. You can also specify additional options that should be passed to the openssl program with `--openssl-option`. If the openssl program is not explicitly specified, then `bpkg` will use `openssl` by default.

  The `--openssl*` values can be optionally qualified with the openssl command in the `command:value` form. This makes the value only applicable to the specific command, for example:

      bpkg rep-create                      \
        --openssl pkeyutl:/path/to/openssl \
        --openssl-option pkeyutl:-engine   \
        --openssl-option pkeyutl:pkcs11    \
        ...

  Note that for `openssl` versions prior to `3.0.0` `bpkg` uses the `rsautl` command instead of `pkeyutl` for the data signing and recovery operations.

  An unqualified value that contains a colon can be specified as qualified with an empty command, for example, `--openssl :C:\bin\openssl`. To see openssl commands executed by `bpkg`, use the verbose mode (`-v` option).

`--openssl-option` `opt`
  Additional option to be passed to the openssl program. See `--openssl` for more information on the openssl program. The values can be optionally qualified with the openssl command, as discussed in `--openssl`. Repeat this option to specify multiple openssl options.
`--auth` `type`
  Types of repositories to authenticate. Valid values for this option are `none`, `remote`, `all`. By default only remote repositories are authenticated. You can request authentication of local repositories by passing `all` or disable authentication completely by passing `none`.
`--trust` `fingerprint`
  Trust repository certificate with a SHA256 `fingerprint`. Such a certificate is trusted automatically, without prompting the user for a confirmation. Repeat this option to trust multiple certificates. See `bpkg-repository-signing(1)` for background.

  Note that by default `openssl` prints a SHA1 fingerprint and to obtain a SHA256 one you will need to pass the `-sha256` option, for example:

      openssl x509 -sha256 -fingerprint -noout -in cert.pem

`--trust-yes`
  Assume the answer to all authentication prompts is `yes`. See `bpkg-repository-signing(1)` for background.
`--trust-no`
  Assume the answer to all authentication prompts is `no`. See `bpkg-repository-signing(1)` for background.
`--git-capabilities` `up`=`pc`
  Protocol capabilities (`pc`) for a `git` repository URL prefix (`up`). Valid values for the capabilities are `dumb` (no shallow clone support), `smart` (support for shallow clone, but not for fetching unadvertised commits), `unadv` (support for shallow clone and for fetching unadvertised commits). For example:

      bpkg build https://example.org/foo.git#master \
        --git-capabilities https://example.org=smart

  See `bpkg-repository-types(1)` for details on the `git` protocol capabilities.

`--pager` `path`
  The pager program to be used to show long text. Commonly used pager programs are `less` and `more`. You can also specify additional options that should be passed to the pager program with `--pager-option`. If an empty string is specified as the pager program, then no pager will be used. If the pager program is not explicitly specified, then `bpkg` will try to use `less`. If it is not available, then no pager will be used.
`--pager-option` `opt`
  Additional option to be passed to the pager program. See `--pager` for more information on the pager program. Repeat this option to specify multiple pager options.
`--options-file` `file`
  Read additional options from `file`. Each option should appear on a separate line optionally followed by space or equal sign (`=`) and an option value. Empty lines and lines starting with `#` are ignored. Option values can be enclosed in double (`"`) or single (`'`) quotes to preserve leading and trailing whitespaces as well as to specify empty values. If the value itself contains trailing or leading quotes, enclose it with an extra pair of quotes, for example `'"x"'`. Non-leading and non-trailing quotes are interpreted as being part of the option value.

  The semantics of providing options in a file is equivalent to providing the same set of options in the same order on the command line at the point where the `--options-file` option is specified except that the shell escaping and quoting is not required. Repeat this option to specify more than one options 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. This option is primarily useful for troubleshooting.

# JSON OUTPUT

Commands that support the JSON output specify their formats as a serialized representation of a C++ `struct` or an array thereof. For example:

    struct package
    {
      string name;
    };

    struct configuration
    {
      uint64_t         id;
      string           path;
      optional<string> name;
      bool             default;
      vector<package>  packages;
    };

An example of the serialized JSON representation of `struct` `configuration`:

    {
      "id": 1,
      "path": "/tmp/hello-gcc",
      "name": "gcc",
      "default": true,
      "packages": [
        {
          "name": "hello"
        }
      ]
    }

This sections provides details on the overall properties of such formats and the semantics of the `struct` serialization.

The order of members in a JSON object is fixed as specified in the corresponding `struct`. While new members may be added in the future (and should be ignored by older consumers), the semantics of the existing members (including whether the top-level entry is an object or array) may not change.

An object member is required unless its type is `optional<>`, `bool`, or `vector<>` (array). For `bool` members absent means `false`. For `vector<>` members absent means empty. An empty top-level array is always present.

For example, the following JSON text is a possible serialization of the above `struct` `configuration`:

    {
      "id": 1,
      "path": "/tmp/hello-gcc"
    }

# DEFAULT OPTIONS FILES

See `bpkg-default-options-files(1)` for an overview of the default options files. The following common options cannot be specified in the default options files:

    --fetch-cache-session

# BUGS

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