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#!/bin/bash
#
# Copyright 2020 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Test the toolchain transition.
# --- begin runfiles.bash initialization ---
# Copy-pasted from Bazel's Bash runfiles library (tools/bash/runfiles/runfiles.bash).
if [[ ! -d "${RUNFILES_DIR:-/dev/null}" && ! -f "${RUNFILES_MANIFEST_FILE:-/dev/null}" ]]; then
if [[ -f "$0.runfiles_manifest" ]]; then
export RUNFILES_MANIFEST_FILE="$0.runfiles_manifest"
elif [[ -f "$0.runfiles/MANIFEST" ]]; then
export RUNFILES_MANIFEST_FILE="$0.runfiles/MANIFEST"
elif [[ -f "$0.runfiles/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
export RUNFILES_DIR="$0.runfiles"
fi
fi
if [[ -f "${RUNFILES_DIR:-/dev/null}/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
source "${RUNFILES_DIR}/bazel_tools/tools/bash/runfiles/runfiles.bash"
elif [[ -f "${RUNFILES_MANIFEST_FILE:-/dev/null}" ]]; then
source "$(grep -m1 "^bazel_tools/tools/bash/runfiles/runfiles.bash " \
"$RUNFILES_MANIFEST_FILE" | cut -d ' ' -f 2-)"
else
echo >&2 "ERROR: cannot find @bazel_tools//tools/bash/runfiles:runfiles.bash"
exit 1
fi
# --- end runfiles.bash initialization ---
source "$(rlocation "io_bazel/src/test/shell/integration_test_setup.sh")" \
|| { echo "integration_test_setup.sh not found!" >&2; exit 1; }
function set_up() {
create_new_workspace
}
function write_constraints() {
local pkg="${1}"
mkdir -p "${pkg}/constraint"
cat > "${pkg}/constraint/BUILD" <<EOF
package(default_visibility = ["//visibility:public"])
# Common constraints for testing.
constraint_setting(name = "type")
constraint_value(
name = "target",
constraint_setting = ":type",
)
constraint_value(
name = "exec",
constraint_setting = ":type",
)
constraint_value(
name = "host",
constraint_setting = ":type",
)
constraint_setting(name = "level")
constraint_value(
name = "alpha",
constraint_setting = ":level",
)
constraint_value(
name = "beta",
constraint_setting = ":level",
)
EOF
}
function write_platforms() {
local pkg="${1}"
mkdir -p "${pkg}/platform"
cat > "${pkg}/platform/platform.bzl" <<EOF
ShowPlatformInfo = provider(fields = ["platform_type", "level"])
def describe_platform_info(platform_info):
if platform_info.level:
return "%s-%s" % (platform_info.platform_type, platform_info.level)
else:
return platform_info.platform_type
def _show_platform_impl(ctx):
target_constraint = ctx.attr._target_constraint[platform_common.ConstraintValueInfo]
exec_constraint = ctx.attr._exec_constraint[platform_common.ConstraintValueInfo]
host_constraint = ctx.attr._host_constraint[platform_common.ConstraintValueInfo]
alpha_constraint = ctx.attr._alpha_constraint[platform_common.ConstraintValueInfo]
beta_constraint = ctx.attr._beta_constraint[platform_common.ConstraintValueInfo]
type = "unknown"
if ctx.target_platform_has_constraint(target_constraint):
type = "target"
elif ctx.target_platform_has_constraint(exec_constraint):
type = "exec"
elif ctx.target_platform_has_constraint(host_constraint):
type = "host"
level = None
if ctx.target_platform_has_constraint(alpha_constraint):
level = "alpha"
elif ctx.target_platform_has_constraint(beta_constraint):
level = "beta"
return [ShowPlatformInfo(
platform_type = type,
level = level,
)]
show_platform = rule(
implementation = _show_platform_impl,
attrs = {
"_target_constraint": attr.label(default = Label("//${pkg}/constraint:target")),
"_exec_constraint": attr.label(default = Label("//${pkg}/constraint:exec")),
"_host_constraint": attr.label(default = Label("//${pkg}/constraint:host")),
"_alpha_constraint": attr.label(default = Label("//${pkg}/constraint:alpha")),
"_beta_constraint": attr.label(default = Label("//${pkg}/constraint:beta")),
},
provides = [ShowPlatformInfo],
)
EOF
cat > "${pkg}/platform/BUILD" <<EOF
load(":platform.bzl", "show_platform")
package(default_visibility = ["//visibility:public"])
show_platform(name = "platform")
# Common platforms.
# Execution platforms.
platform(
name = "exec_alpha",
constraint_values = [
"//${pkg}/constraint:alpha",
"//${pkg}/constraint:exec",
],
)
platform(
name = "exec_beta",
constraint_values = [
"//${pkg}/constraint:beta",
"//${pkg}/constraint:exec",
],
)
# Host platform.
platform(
name = "host",
constraint_values = [
"//${pkg}/constraint:host",
],
)
# Target platform.
platform(
name = "target",
constraint_values = [
"//${pkg}/constraint:target",
],
)
EOF
# Append to WORKSPACE
cat >>WORKSPACE <<EOF
register_execution_platforms(
"//${pkg}/platform:exec_alpha",
"//${pkg}/platform:exec_beta",
)
EOF
}
function write_toolchains() {
local pkg="${1}"
mkdir -p "${pkg}/toolchain"
cat > "${pkg}/toolchain/toolchain.bzl" <<EOF
load("//${pkg}/platform:platform.bzl", "ShowPlatformInfo", "describe_platform_info")
load(":extra_lib.bzl", "ExtraMessageProvider")
def _sample_toolchain_impl(ctx):
target_dep = describe_platform_info(ctx.attr._target_dep[ShowPlatformInfo])
tool_dep = describe_platform_info(ctx.attr._tool_dep[ShowPlatformInfo])
dep_messages = []
for dep in ctx.attr.deps:
message = dep[ExtraMessageProvider].message
dep_messages.append(message)
message = "sample_toolchain: message: %s, target_dep: %s, tool_dep: %s, extra_deps: [%s]" % (
ctx.attr.message,
target_dep,
tool_dep,
", ".join(dep_messages),
)
toolchain = platform_common.ToolchainInfo(
message = message,
)
return [toolchain]
sample_toolchain = rule(
implementation = _sample_toolchain_impl,
attrs = {
"message": attr.string(),
"deps": attr.label_list(),
"_target_dep": attr.label(
cfg = "target",
providers = [ShowPlatformInfo],
default = Label("//${pkg}/platform")),
"_tool_dep": attr.label(
cfg = "exec",
providers = [ShowPlatformInfo],
default = Label("//${pkg}/platform")),
},
)
EOF
cat > "${pkg}/toolchain/extra_lib.bzl" <<EOF
load("//${pkg}/platform:platform.bzl", "ShowPlatformInfo", "describe_platform_info")
ExtraMessageProvider = provider(fields = ["message"])
def _extra_lib_impl(ctx):
target_dep = describe_platform_info(ctx.attr._target_dep[ShowPlatformInfo])
tool_dep = describe_platform_info(ctx.attr._tool_dep[ShowPlatformInfo])
message = "extra_lib: message: %s, target_dep: %s, tool_dep: %s" % (
ctx.attr.message,
target_dep,
tool_dep,
)
provider = ExtraMessageProvider(message = message)
return [provider]
extra_lib = rule(
implementation = _extra_lib_impl,
attrs = {
"message": attr.string(),
"_target_dep": attr.label(
cfg = "target",
providers = [ShowPlatformInfo],
default = Label("//${pkg}/platform")),
"_tool_dep": attr.label(
cfg = "exec",
providers = [ShowPlatformInfo],
default = Label("//${pkg}/platform")),
},
provides = [ExtraMessageProvider],
)
EOF
cat > "${pkg}/toolchain/BUILD" <<EOF
package(default_visibility = ["//visibility:public"])
load(":toolchain.bzl", "sample_toolchain")
toolchain_type(name = "toolchain_type")
sample_toolchain(
name = "sample_toolchain_alpha_impl",
message = "alpha toolchain",
deps = [
":extra",
],
)
toolchain(
name = "sample_toolchain_alpha",
exec_compatible_with = [
"//${pkg}/constraint:alpha",
],
toolchain = "sample_toolchain_alpha_impl",
toolchain_type = ":toolchain_type",
)
sample_toolchain(
name = "sample_toolchain_beta_impl",
message = "beta toolchain",
deps = [
":extra",
],
)
load(":extra_lib.bzl", "extra_lib")
extra_lib(
name = "extra",
message = "extra_lib foo",
)
toolchain(
name = "sample_toolchain_beta",
exec_compatible_with = [
"//${pkg}/constraint:beta",
],
toolchain = "sample_toolchain_beta_impl",
toolchain_type = ":toolchain_type",
)
EOF
# Append to WORKSPACE
cat >>WORKSPACE <<EOF
register_toolchains(
"//${pkg}/toolchain:sample_toolchain_alpha",
"//${pkg}/toolchain:sample_toolchain_beta",
)
EOF
}
function write_rule() {
local pkg="${1}"
mkdir -p "${pkg}/rule"
cat > "${pkg}/rule/rule.bzl" <<EOF
load("//${pkg}/platform:platform.bzl", "ShowPlatformInfo", "describe_platform_info")
def _sample_impl(ctx):
toolchain = ctx.toolchains["//${pkg}/toolchain:toolchain_type"]
message = ctx.attr.message
exec_platform = describe_platform_info(ctx.attr._exec[ShowPlatformInfo])
str = 'Using toolchain: rule message: "%s", exec platform: "%s", toolchain message: "%s"\n' % (message, exec_platform, toolchain.message)
log = ctx.outputs.log
ctx.actions.write(
output = log,
content = str,
)
return [DefaultInfo(files = depset([log]))]
sample = rule(
implementation = _sample_impl,
attrs = {
"message": attr.string(),
"_exec": attr.label(
cfg = "exec",
providers = [ShowPlatformInfo],
default = Label("//${pkg}/platform")),
},
outputs = {
"log": "%{name}.log",
},
toolchains = ["//${pkg}/toolchain:toolchain_type"],
incompatible_use_toolchain_transition = True,
)
EOF
cat > "${pkg}/rule/BUILD" <<EOF
package(default_visibility = ["//visibility:public"])
EOF
}
function test_toolchain_transition() {
local -r pkg="${FUNCNAME[0]}"
write_constraints "${pkg}"
write_platforms "${pkg}"
write_toolchains "${pkg}"
write_rule "${pkg}"
mkdir -p "${pkg}"
cat > "${pkg}/BUILD" <<EOF
package(default_visibility = ["//visibility:public"])
load("//${pkg}/rule:rule.bzl", "sample")
sample(
name = "sample",
exec_compatible_with = [
"//${pkg}/constraint:beta",
],
message = "Hello",
)
EOF
bazel build \
--platforms="//${pkg}/platform:target" \
--host_platform="//${pkg}/platform:host" \
"//${pkg}:sample" &> $TEST_log || fail "Build failed"
# Verify contents of sample.log.
cat "bazel-bin/${pkg}/sample.log" >> $TEST_log
# The execution platform should be beta.
expect_log 'rule message: "Hello", exec platform: "exec-beta"'
# The toolchain should have proper target and exec matching the top target.
expect_log 'sample_toolchain: message: beta toolchain, target_dep: target, tool_dep: exec-beta'
# The toolchain's dependencies should use alpha for exec.
# Make sure the exec platform does not propagate to further dependencies.
expect_log 'extra_lib: message: extra_lib foo, target_dep: target, tool_dep: exec-alpha'
}
# Regression test for https://github.com/bazelbuild/bazel/issues/11993
# This was causing cquery to not correctly generate ConfiguredTargetKeys for
# toolchains, leading to the message "Targets were missing from graph"
function test_toolchain_transition_cquery() {
local -r pkg="${FUNCNAME[0]}"
write_constraints "${pkg}"
write_platforms "${pkg}"
write_toolchains "${pkg}"
write_rule "${pkg}"
mkdir -p "${pkg}"
cat > "${pkg}/BUILD" <<EOF
package(default_visibility = ["//visibility:public"])
load("//${pkg}/rule:rule.bzl", "sample")
sample(
name = "sample",
message = "Hello",
)
EOF
bazel cquery \
--platforms="//${pkg}/platform:target" \
--host_platform="//${pkg}/platform:host" \
"deps(//${pkg}:sample)" &> $TEST_log || fail "Build failed"
expect_not_log "Targets were missing from graph"
}
run_suite "toolchain transition tests"