Struct BuilderOptions

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pub struct BuilderOptions { /* private fields */ }

Expand description

Builder for options to the flatc compiler options. When consumed using BuilderOptions::compile, this generates rust code from the flatbuffer definition files provided. The basic usage for this struct looks something like this:

use flatbuffers_build::BuilderOptions;

BuilderOptions::new_with_files(["some_file.fbs", "some_other_file.fbs"])
    .compile()
    .expect("flatbuffer compilation failed");

This struct operates as a builder pattern, so you can do things like set the flatc path:

BuilderOptions::new_with_files(["some_file.fbs", "some_other_file.fbs"])
    .set_compiler("/some/path/to/flatc")
    .compile()
    .expect("flatbuffer compilation failed");

Consult the functions bellow for more details.

Implementations§

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impl BuilderOptions

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pub fn new_with_files<P: AsRef<Path>, I: IntoIterator<Item = P>>( files: I, ) -> Self

Create a new builder for the compiler options. We purely initialise with an iterable of files to compile. To actually build, refer to the Self::compile function. Note that the order of the files is actually important, as incorrect ordering will result in incorrect generated code with missing components. You should always put dependencies of other files earlier in the list. In other words, if schema_a.fbs imports schema_b.fbs, then you’d want to call this with:

BuilderOptions::new_with_files(["schema_b.fbs", "schema_a.fbs"]);

§Arguments

files - An iterable of files that should be compiled into rust code. No glob resolution happens here, and all paths MUST match to real files, either as absolute paths or relative to the current working directory.

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pub fn set_compiler<S: AsRef<str>>(self, compiler: S) -> Self

Set the path of the flatc binary to use as a compiler. If no such path is provided, we will default to first using whatever’s set in the FLATC_PATH environment variable, or if that’s not set, we will let the system resolve using standard PATH resolution.

§Arguments

compiler - Path to the compiler to run. This can also be a name that we should resolve using standard PATH resolution.

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pub fn set_output_path<P: AsRef<Path>>(self, output_path: P) -> Self

Call this to set the output directory of the protobufs. If you don’t set this, we will default to writing to ${OUT_DIR}/flatbuffers.

§Arguments

output_path - The directory to write the files to.

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pub fn set_symlink_directory<P: AsRef<Path>>(self, symlink_path: P) -> Self

Set a path to create a symlink that points to the output files. This is commonly used to symlink to a folder under src so you can normally pull in the generated code as a module. We recommend always calling this and setting it to src/generated or something similar.

§Arguments

symlink_path - Path to generate the symlink to.

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pub fn supress_buildrs_directives(self) -> Self

Set this if you’re not running from a build.rs script and don’t want us to print the build.rs instructions/directives that we would otherwise print in stdout.

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