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PlatformProviderUtils should ignore targets that don't have the needed
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provider.

Also update PlatformProviderUtils to work directly with Lists.

This prevents a few types of crash that can occur from having null
values in a List.

Fixes bazelbuild#12879.

Closes bazelbuild#12931.

PiperOrigin-RevId: 354595201
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katre authored and copybara-github committed Jan 29, 2021
1 parent 3e6e975 commit 24d0864
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Showing 4 changed files with 40 additions and 28 deletions.
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,6 @@
package com.google.devtools.build.lib.analysis.constraints;

import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.collect.Streams.stream;

import com.google.auto.value.AutoValue;
import com.google.common.base.Joiner;
Expand Down Expand Up @@ -912,9 +911,9 @@ public static ConfiguredTarget incompatibleConfiguredTarget(
if (ruleContext.getRule().getRuleClassObject().useToolchainResolution()
&& ruleContext.attributes().has("target_compatible_with")) {
ImmutableList<ConstraintValueInfo> invalidConstraintValues =
stream(
PlatformProviderUtils.constraintValues(
ruleContext.getPrerequisites("target_compatible_with")))
PlatformProviderUtils.constraintValues(
ruleContext.getPrerequisites("target_compatible_with"))
.stream()
.filter(cv -> !ruleContext.targetPlatformHasConstraint(cv))
.collect(toImmutableList());

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Expand Up @@ -14,8 +14,12 @@

package com.google.devtools.build.lib.analysis.platform;

import com.google.common.collect.Iterables;
import static com.google.common.base.Predicates.notNull;
import static com.google.common.collect.ImmutableList.toImmutableList;

import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.ProviderCollection;
import java.util.List;
import javax.annotation.Nullable;

/** Utility methods to help locate platform-related providers. */
Expand All @@ -31,8 +35,11 @@ public static PlatformInfo platform(@Nullable ProviderCollection target) {
}

/** Retrieves and casts {@link PlatformInfo} providers from the given targets. */
public static Iterable<PlatformInfo> platforms(Iterable<? extends ProviderCollection> targets) {
return Iterables.transform(targets, PlatformProviderUtils::platform);
public static ImmutableList<PlatformInfo> platforms(List<? extends ProviderCollection> targets) {
return targets.stream()
.map(PlatformProviderUtils::platform)
.filter(notNull())
.collect(toImmutableList());
}

/** Retrieves and casts the {@link ConstraintSettingInfo} provider from the given target. */
Expand All @@ -45,9 +52,12 @@ public static ConstraintSettingInfo constraintSetting(@Nullable ProviderCollecti
}

/** Retrieves and casts {@link ConstraintSettingInfo} providers from the given targets. */
public static Iterable<ConstraintSettingInfo> constraintSettings(
Iterable<? extends ProviderCollection> targets) {
return Iterables.transform(targets, PlatformProviderUtils::constraintSetting);
public static ImmutableList<ConstraintSettingInfo> constraintSettings(
List<? extends ProviderCollection> targets) {
return targets.stream()
.map(PlatformProviderUtils::constraintSetting)
.filter(notNull())
.collect(toImmutableList());
}

/** Retrieves and casts the {@link ConstraintValueInfo} provider from the given target. */
Expand All @@ -65,9 +75,12 @@ public static boolean hasConstraintValue(ProviderCollection target) {
}

/** Retrieves and casts {@link ConstraintValueInfo} providers from the given targets. */
public static Iterable<ConstraintValueInfo> constraintValues(
Iterable<? extends ProviderCollection> targets) {
return Iterables.transform(targets, PlatformProviderUtils::constraintValue);
public static ImmutableList<ConstraintValueInfo> constraintValues(
List<? extends ProviderCollection> targets) {
return targets.stream()
.map(PlatformProviderUtils::constraintValue)
.filter(notNull())
.collect(toImmutableList());
}

/**
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Expand Up @@ -14,9 +14,9 @@

package com.google.devtools.build.lib.rules.platform;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.FileProvider;
Expand All @@ -35,7 +35,6 @@
import com.google.devtools.build.lib.util.CPU;
import com.google.devtools.build.lib.util.OS;
import com.google.devtools.build.lib.util.Pair;
import java.util.List;
import java.util.Map;

/** Defines a platform for execution contexts. */
Expand All @@ -49,10 +48,9 @@ public ConfiguredTarget create(RuleContext ruleContext)

PlatformInfo.Builder platformBuilder = PlatformInfo.builder().setLabel(ruleContext.getLabel());

List<PlatformInfo> parentPlatforms =
Lists.newArrayList(
PlatformProviderUtils.platforms(
ruleContext.getPrerequisites(PlatformRule.PARENTS_PLATFORM_ATTR)));
ImmutableList<PlatformInfo> parentPlatforms =
PlatformProviderUtils.platforms(
ruleContext.getPrerequisites(PlatformRule.PARENTS_PLATFORM_ATTR));

if (parentPlatforms.size() > 1) {
throw ruleContext.throwWithAttributeError(
Expand Down Expand Up @@ -130,7 +128,7 @@ private void autodetectConstraints(

// Add the CPU.
CPU cpu = cpuValues.getFirst();
Iterable<ConstraintValueInfo> cpuConstraintValues =
ImmutableList<ConstraintValueInfo> cpuConstraintValues =
PlatformProviderUtils.constraintValues(
ruleContext.getPrerequisites(PlatformRule.CPU_CONSTRAINTS_ATTR));
for (ConstraintValueInfo constraint : cpuConstraintValues) {
Expand All @@ -142,7 +140,7 @@ private void autodetectConstraints(

// Add the OS.
OS os = cpuValues.getSecond();
Iterable<ConstraintValueInfo> osConstraintValues =
ImmutableList<ConstraintValueInfo> osConstraintValues =
PlatformProviderUtils.constraintValues(
ruleContext.getPrerequisites(PlatformRule.OS_CONSTRAINTS_ATTR));
for (ConstraintValueInfo constraint : osConstraintValues) {
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Expand Up @@ -14,7 +14,9 @@

package com.google.devtools.build.lib.rules.platform;

import com.google.common.collect.Iterables;
import static com.google.common.collect.ImmutableList.toImmutableList;

import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.FileProvider;
Expand All @@ -41,16 +43,16 @@ public ConfiguredTarget create(RuleContext ruleContext)
ToolchainTypeInfo toolchainType =
PlatformProviderUtils.toolchainType(
ruleContext.getPrerequisite(ToolchainRule.TOOLCHAIN_TYPE_ATTR));
Iterable<ConstraintValueInfo> execConstraints =
ImmutableList<ConstraintValueInfo> execConstraints =
PlatformProviderUtils.constraintValues(
ruleContext.getPrerequisites(ToolchainRule.EXEC_COMPATIBLE_WITH_ATTR));
Iterable<ConstraintValueInfo> targetConstraints =
ImmutableList<ConstraintValueInfo> targetConstraints =
PlatformProviderUtils.constraintValues(
ruleContext.getPrerequisites(ToolchainRule.TARGET_COMPATIBLE_WITH_ATTR));
Iterable<ConfigMatchingProvider> targetSettings =
Iterables.transform(
ruleContext.getPrerequisites(ToolchainRule.TARGET_SETTING_ATTR),
target -> target.getProvider(ConfigMatchingProvider.class));
ImmutableList<ConfigMatchingProvider> targetSettings =
ruleContext.getPrerequisites(ToolchainRule.TARGET_SETTING_ATTR).stream()
.map(target -> target.getProvider(ConfigMatchingProvider.class))
.collect(toImmutableList());
Label toolchainLabel =
ruleContext.attributes().get(ToolchainRule.TOOLCHAIN_ATTR, BuildType.NODEP_LABEL);

Expand Down

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