1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
load("@rules_cc//cc:action_names.bzl", "C_COMPILE_ACTION_NAME")
load("@rules_cc//cc:toolchain_utils.bzl", "find_cpp_toolchain")
def _generate_fruit_config_impl(ctx):
cc_toolchain = find_cpp_toolchain(ctx)
feature_configuration = cc_common.configure_features(
ctx = ctx,
cc_toolchain = cc_toolchain,
requested_features = ctx.features,
unsupported_features = ctx.disabled_features,
)
c_compiler_path = cc_common.get_tool_for_action(
feature_configuration = feature_configuration,
action_name = C_COMPILE_ACTION_NAME,
)
check_output_files = []
for check_source in ctx.files.check_sources:
check_name = check_source.path[:-len(".cpp")].split('/')[-1].split('\\')[-1]
output_file = ctx.actions.declare_file(check_name + ".o")
c_compile_variables = cc_common.create_compile_variables(
feature_configuration = feature_configuration,
cc_toolchain = cc_toolchain,
user_compile_flags = ctx.fragments.cpp.copts + ctx.fragments.cpp.conlyopts,
source_file = check_source.path,
output_file = output_file.path,
)
command_line = cc_common.get_memory_inefficient_command_line(
feature_configuration = feature_configuration,
action_name = C_COMPILE_ACTION_NAME,
variables = c_compile_variables,
)
env = cc_common.get_environment_variables(
feature_configuration = feature_configuration,
action_name = C_COMPILE_ACTION_NAME,
variables = c_compile_variables,
)
check_define = 'FRUIT_HAS_%s' % check_name.upper()
check_output_file = ctx.actions.declare_file(check_name + ".h")
ctx.actions.run_shell(
command = '"$@" &>/dev/null && echo "#define %s 1" >"%s" || echo "#define %s 0" >"%s"; touch "%s"' % (
check_define, check_output_file.path, check_define, check_output_file.path, output_file.path
),
arguments = [c_compiler_path] + command_line,
env = env,
inputs = depset(
[check_source],
transitive = [cc_toolchain.all_files],
),
outputs = [output_file, check_output_file],
)
check_output_files.append(check_output_file)
merged_output_file = ctx.actions.declare_file("fruit/impl/fruit-config-base.h")
ctx.actions.run_shell(
command = '\n'.join([
'(',
'echo "#ifndef FRUIT_CONFIG_BASE_H"',
'echo "#define FRUIT_CONFIG_BASE_H"',
'echo "#define FRUIT_USES_BOOST 1"',
'cat %s' % ' '.join([check_output_file.path for check_output_file in check_output_files]),
'echo "#endif"',
')>%s' % merged_output_file.path
]),
inputs = check_output_files,
outputs = [merged_output_file],
)
compilation_context, compilation_outputs = cc_common.compile(
actions = ctx.actions,
feature_configuration = feature_configuration,
cc_toolchain = cc_toolchain,
public_hdrs = [merged_output_file],
name = "%s_link" % ctx.label.name,
)
linking_context, linking_outputs = cc_common.create_linking_context_from_compilation_outputs(
actions = ctx.actions,
feature_configuration = feature_configuration,
compilation_outputs = compilation_outputs,
cc_toolchain = cc_toolchain,
name = "%s_link" % ctx.label.name,
)
return [
DefaultInfo(files = depset([merged_output_file]), runfiles = ctx.runfiles(files = [merged_output_file])),
CcInfo(compilation_context=compilation_context, linking_context=linking_context),
]
generate_fruit_config = rule(
implementation = _generate_fruit_config_impl,
attrs = {
"check_sources": attr.label_list(allow_files = True),
"_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")),
},
toolchains = ["@bazel_tools//tools/cpp:toolchain_type"],
fragments = ["cpp"],
)
|
