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PROGRAM:

NAME


capnp - compiler for Cap'n Proto data interchange format definition files

SYNOPSIS


capnp [<options>] <command> [<args>]

capnp id

capnp [--help | --version]

DESCRIPTION


This manual page documents briefly the capnp command.

It was written for the Debian distribution because the original program does not have a
manual page.

capnp is wrapper for various tools used to manipulate the Cap'n Proto data interchange
format. These tools include a definition file compiler, a C++ backend, a decoder for
converting Cap'n Proto messages to text and a generator for Cap'n Proto definition IDs.

OPTIONS


The program follows the usual GNU command line syntax, with long options starting with two
dashes (`-'). A summary of options is included below.

-IDIR, --import-pathDIR
Add DIR to the list of directories searched for non-relative imports (ones that start
with a '/').

--no-standard-import
Do not add any default import paths; use only those specified by -I. Otherwise,
typically /usr/include and /usr/local/include are added by default.

--verbose
Log informational messages to stderr; useful for debugging.

--help
Show summary of options.

--version
Show version of program.

COMMANDS


compile
Compile Cap'n Proto schema files & generate corresponding source code in one or more
languages.

OPTIONS
-I<dir>, --import-path=<dir>
Add <dir> to the list of directories searched for non-relative imports (ones that
start with a '/').

--no-standard-import
Do not add any default import paths; use only those specified by -I. Otherwise,
typically /usr/include and /usr/local/include are added by default.

-olang[:dir], --output=lang[:dir]
Generate source code for language <lang> in directory <dir> (default: current
directory). <lang> actually specifies a plugin to use. If <lang> is a simple word,
the compiler for a plugin called 'capnpc-<lang>' in $PATH. If <lang> is a file
path containing slashes, it is interpreted as the exact plugin executable file
name, and $PATH is not searched.

--src-prefix=<prefix>
If a file specified for compilation starts with <prefix>, remove the prefix for
the purpose of deciding the names of output files. For example, the following
command: capnp --src-prefix=foo/bar -oc++:corge foo/bar/baz/qux.capnp would
generate the files corge/baz/qux.capnp.{h,c++}.

decode
Decodes one or more encoded Cap'n Proto messages as text. Messages are read from standard
input and by default are expected to be in standard Cap'n Proto serialization format.

OPTIONS
-I<dir>, --import-path=<dir>
Add <dir> to the list of directories searched for non-relative imports (ones that
start with a '/').

-f, --flat
Interpret the input as one large single-segment message rather than a stream in
standard serialization format.

--no-standard-import
Do not add any default import paths; use only those specified by -I. Otherwise,
typically /usr/include and /usr/local/include are added by default.

-p, --packed
Expect the input to be packed using standard Cap'n Proto packing, which deflates
zero-valued bytes.

--short
Print in short (non-pretty) format. Each message will be printed on one line,
without using whitespace to improve readability.

id
Generates a unique identifier for Cap'n Proto schema files.

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