xref: /aosp_15_r20/external/bazelbuild-rules_rust/BUILD.bazel (revision d4726bddaa87cc4778e7472feed243fa4b6c267f) 
1load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
2load("@bazel_skylib//rules:common_settings.bzl", "string_flag")
3load(
4    "//rust:defs.bzl",
5    "capture_clippy_output",
6    "clippy_flag",
7    "clippy_flags",
8    "error_format",
9    "extra_exec_rustc_flag",
10    "extra_exec_rustc_flags",
11    "extra_rustc_flag",
12    "extra_rustc_flags",
13    "no_std",
14    "per_crate_rustc_flag",
15    "rustc_output_diagnostics",
16)
17
18exports_files([
19    "LICENSE",
20    "MODULE.bazel",
21])
22
23bzl_library(
24    name = "bzl_lib",
25    srcs = [
26        ":version.bzl",
27    ],
28    visibility = ["//visibility:public"],
29)
30
31# This setting may be changed from the command line to generate machine readable errors.
32error_format(
33    name = "error_format",
34    build_setting_default = "human",
35    visibility = ["//visibility:public"],
36)
37
38# This setting may be changed from the command line to generate rustc diagnostics.
39rustc_output_diagnostics(
40    name = "rustc_output_diagnostics",
41    build_setting_default = False,
42    visibility = ["//visibility:public"],
43)
44
45# This setting may be used to pass extra options to clippy from the command line.
46# It applies across all targets.
47clippy_flags(
48    name = "clippy_flags",
49    build_setting_default = [],
50    visibility = ["//visibility:public"],
51)
52
53clippy_flag(
54    name = "clippy_flag",
55    build_setting_default = "",
56    visibility = ["//visibility:public"],
57)
58
59# This setting may be used to pass extra options to rustc from the command line
60# in non-exec configuration.
61# It applies across all targets whereas the rustc_flags option on targets applies only
62# to that target. This can be useful for passing build-wide options such as LTO.
63extra_rustc_flags(
64    name = "extra_rustc_flags",
65    build_setting_default = [],
66    visibility = ["//visibility:public"],
67)
68
69extra_rustc_flag(
70    name = "extra_rustc_flag",
71    build_setting_default = "",
72    visibility = ["//visibility:public"],
73)
74
75# This setting may be used to pass extra options to rustc from the command line
76# in exec configuration.
77# It applies across all targets whereas the rustc_flags option on targets applies only
78# to that target. This can be useful for passing build-wide options such as LTO.
79extra_exec_rustc_flags(
80    name = "extra_exec_rustc_flags",
81    build_setting_default = [],
82    visibility = ["//visibility:public"],
83)
84
85extra_exec_rustc_flag(
86    name = "extra_exec_rustc_flag",
87    build_setting_default = "",
88    visibility = ["//visibility:public"],
89)
90
91per_crate_rustc_flag(
92    name = "experimental_per_crate_rustc_flag",
93    build_setting_default = "",
94    visibility = ["//visibility:public"],
95)
96
97# This setting is used by the clippy rules. See https://bazelbuild.github.io/rules_rust/rust_clippy.html
98label_flag(
99    name = "clippy.toml",
100    build_setting_default = "//tools/clippy:clippy.toml",
101    visibility = ["//visibility:public"],
102)
103
104# This setting is used by the rustfmt rules. See https://bazelbuild.github.io/rules_rust/rust_fmt.html
105label_flag(
106    name = "rustfmt.toml",
107    build_setting_default = "//tools/rustfmt:rustfmt.toml",
108    visibility = ["//visibility:public"],
109)
110
111alias(
112    name = "rustfmt",
113    actual = "//tools/rustfmt:target_aware_rustfmt",
114    visibility = ["//visibility:public"],
115)
116
117capture_clippy_output(
118    name = "capture_clippy_output",
119    build_setting_default = False,
120    visibility = ["//visibility:public"],
121)
122
123# This setting may be used to enable builds without the standard library.
124# Currently only no_std + alloc is supported, which can be enabled with setting the value to "alloc".
125# In the future we could add support for additional modes, e.g "core", "alloc,collections".
126string_flag(
127    name = "no_std",
128    build_setting_default = "off",
129    values = [
130        "alloc",
131        "off",
132    ],
133    visibility = ["//visibility:public"],
134)
135
136# A hack target to allow as to only apply the no_std mode in target config.
137no_std(
138    name = "build_target_in_no_std",
139)
140
141# A config setting for setting conditional `cargo_features`, `deps`, based on the `:no_std` value.
142config_setting(
143    name = "is_no_std",
144    flag_values = {
145        ":build_target_in_no_std": "alloc",
146    },
147    visibility = ["//visibility:public"],
148)
149