创建 FIDL 库

mkdir -p vendor/fidl-tutorials/building-fidl

touch vendor/fidl-tutorials/building-fidl/key_value_store.test.fidl

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
library examples.keyvaluestore.baseline;

/// An item in the store. The key must match the regex `^[A-z][A-z0-9_\.\/]{2,62}[A-z0-9]$`. That
/// is, it must start with a letter, end with a letter or number, contain only letters, numbers,
/// periods, and slashes, and be between 4 and 64 characters long.
type Item = struct {
    key string:128;
    value vector<byte>:64000;
};

/// An enumeration of things that may go wrong when trying to write a value to our store.
type WriteError = flexible enum {
    UNKNOWN = 0;
    INVALID_KEY = 1;
    INVALID_VALUE = 2;
    ALREADY_EXISTS = 3;
};

/// A very basic key-value store - so basic, in fact, that one may only write to it, never read!
@discoverable
open protocol Store {
    /// Writes an item to the store.
    flexible WriteItem(struct {
        attempt Item;
    }) -> () error WriteError;
};

touch vendor/fidl-tutorials/building-fidl/BUILD.gn

# Copyright 2022 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/fidl/fidl.gni")

# Builds the FIDL library into a set of language specific bindings. Bindings for a given language
# may be imported by depending on this target, followed by a language-specific underscore:
#
#   ":examples.keyvaluestore.baseline_rust"
#   ":examples.keyvaluestore.baseline_cpp"
#   ...and so on
#
fidl("examples.keyvaluestore.baseline") {
  sources = [ "key_value_store.test.fidl" ]
  excluded_checks = [ "wrong-prefix-for-platform-source-library" ]
  enable_rust_next = true
}

fx set core.x64\
  --with //vendor/fidl-tutorials/building-fidl:examples.keyvaluestore.baseline_rust\
  --with //vendor/fidl-tutorials/building-fidl:examples.keyvaluestore.baseline_cpp

fx build