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Allow WORKSPACE and WORKSPACE-loaded .bzl files to see Bzlmod root mo…
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…dule's mappings (bazelbuild#17818)

Currently, we evaluate WORKSPACE (`WorkspaceFileFunction`) and WORKSPACE-loaded .bzl files (`BzlLoadFunction` with `BzlLoadValue.KeyForWorkspace`) with the repo mapping purely computed from previous WORKSPACE chunks. This is unlike BUILD-loaded .bzl files from WORKSPACE-defined repos (`BzlLoadFunction` with `BzlLoadValue.KeyForBuild`, which is the same as `RepositoryMappingFunction`), which take the mappings of the Bzlmod root module into account. This CL fixes that discrepancy by doing the same "repo mapping composition" everywhere.

Fixes bazelbuild#17655

RELNOTES: Fixed an issue where WORKSPACE and WORKSPACE-loaded .bzl files couldn't see the Bzlmod root module's mappings when Bzlmod is enabled.
PiperOrigin-RevId: 515318590
Change-Id: I4babc922f6cdb932d17ce18d9a9d9d427dbed2eb

Co-authored-by: Googler <[email protected]>
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@keertk @Wyverald
keertk and Wyverald authored Mar 20, 2023
1 parent fb695ed commit 3a7236b
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Showing 9 changed files with 206 additions and 62 deletions.
40 changes: 31 additions & 9 deletions src/main/java/com/google/devtools/build/lib/cmdline/RepositoryMapping.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -49,16 +49,18 @@ public abstract class RepositoryMapping {
abstract RepositoryName ownerRepo();

public static RepositoryMapping create(
Map<String, RepositoryName> repositoryMapping, RepositoryName ownerRepo) {
return new AutoValue_RepositoryMapping(
ImmutableMap.copyOf(Preconditions.checkNotNull(repositoryMapping)),
Preconditions.checkNotNull(ownerRepo));
Map<String, RepositoryName> entries, RepositoryName ownerRepo) {
return createInternal(
Preconditions.checkNotNull(entries), Preconditions.checkNotNull(ownerRepo));
}

public static RepositoryMapping createAllowingFallback(
Map<String, RepositoryName> repositoryMapping) {
return new AutoValue_RepositoryMapping(
ImmutableMap.copyOf(Preconditions.checkNotNull(repositoryMapping)), null);
public static RepositoryMapping createAllowingFallback(Map<String, RepositoryName> entries) {
return createInternal(Preconditions.checkNotNull(entries), null);
}

private static RepositoryMapping createInternal(
Map<String, RepositoryName> entries, RepositoryName ownerRepo) {
return new AutoValue_RepositoryMapping(ImmutableMap.copyOf(entries), ownerRepo);
}

/**
Expand All @@ -68,7 +70,7 @@ public static RepositoryMapping createAllowingFallback(
public RepositoryMapping withAdditionalMappings(Map<String, RepositoryName> additionalMappings) {
HashMap<String, RepositoryName> allMappings = new HashMap<>(additionalMappings);
allMappings.putAll(entries());
return new AutoValue_RepositoryMapping(ImmutableMap.copyOf(allMappings), ownerRepo());
return createInternal(allMappings, ownerRepo());
}

/**
Expand Down Expand Up @@ -114,4 +116,24 @@ public Optional<String> getInverse(RepositoryName postMappingName) {
.map(Entry::getKey)
.findFirst();
}

/**
* Creates a new {@link RepositoryMapping} instance that is the equivalent of composing this
* {@link RepositoryMapping} with another one. That is, {@code a.composeWith(b).get(name) ===
* b.get(a.get(name))} (treating {@code b} as allowing fallback).
*
* <p>Since we're treating the result of {@code a.get(name)} as an apparent repo name instead of a
* canonical repo name, this only really makes sense when {@code a} does not use strict deps (i.e.
* allows fallback).
*/
public RepositoryMapping composeWith(RepositoryMapping other) {
Preconditions.checkArgument(
!usesStrictDeps(), "only an allow-fallback mapping can be composed with other mappings");
HashMap<String, RepositoryName> entries = new HashMap<>(other.entries());
for (Map.Entry<String, RepositoryName> entry : entries().entrySet()) {
RepositoryName mappedName = other.get(entry.getValue().getName());
entries.put(entry.getKey(), mappedName.isVisible() ? mappedName : entry.getValue());
}
return createInternal(entries, null);
}
}
55 changes: 37 additions & 18 deletions src/main/java/com/google/devtools/build/lib/skyframe/BzlLoadFunction.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -165,7 +165,7 @@ public static BzlLoadFunction create(
// (b) The memory overhead of the extra Skyframe node and edge per bzl file is pure
// waste.
new InliningAndCachingGetter(packageFactory, hashFunction, bzlCompileCache),
/*cachedBzlLoadDataManager=*/ null);
/* cachedBzlLoadDataManager= */ null);
}

public static BzlLoadFunction createForInlining(
Expand All @@ -188,7 +188,7 @@ public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
BzlLoadValue.Key key = (BzlLoadValue.Key) skyKey.argument();
try {
return computeInternal(key, env, /*inliningState=*/ null);
return computeInternal(key, env, /* inliningState= */ null);
} catch (BzlLoadFailedException e) {
throw new BzlLoadFunctionException(e);
}
Expand Down Expand Up @@ -455,12 +455,12 @@ private InliningState(
static InliningState create(Environment env) {
return new InliningState(
new RecordingSkyFunctionEnvironment(env, x -> {}, x -> {}, x -> {}),
/*cachedDataBuilder=*/ null,
/*loadStack=*/ new LinkedHashSet<>(),
/*successfulLoads=*/ new HashMap<>(),
/*unsuccessfulLoads=*/ new HashSet<>(),
/* cachedDataBuilder= */ null,
/* loadStack= */ new LinkedHashSet<>(),
/* successfulLoads= */ new HashMap<>(),
/* unsuccessfulLoads= */ new HashSet<>(),
// No parent value to mutate
/*childCachedDataHandler=*/ x -> {});
/* childCachedDataHandler= */ x -> {});
}

/**
Expand Down Expand Up @@ -598,7 +598,10 @@ private StarlarkBuiltinsValue getBuiltins(
env.getValueOrThrow(StarlarkBuiltinsValue.key(), BuiltinsFailedException.class);
} else {
return StarlarkBuiltinsFunction.computeInline(
StarlarkBuiltinsValue.key(), inliningState, packageFactory, /*bzlLoadFunction=*/ this);
StarlarkBuiltinsValue.key(),
inliningState,
packageFactory,
/* bzlLoadFunction= */ this);
}
} catch (BuiltinsFailedException e) {
throw BzlLoadFailedException.builtinsFailed(key.getLabel(), e);
Expand Down Expand Up @@ -776,7 +779,7 @@ private BzlLoadValue computeInternalWithCompiledBzl(
loadValues,
loadKeys,
programLoads,
/*demoteErrorsToWarnings=*/ !builtins.starlarkSemantics.getBool(
/* demoteErrorsToWarnings= */ !builtins.starlarkSemantics.getBool(
BuildLanguageOptions.CHECK_BZL_VISIBILITY),
env.getListener());

Expand Down Expand Up @@ -845,7 +848,8 @@ private BzlLoadValue computeInternalWithCompiledBzl(
private static RepositoryMapping getRepositoryMapping(
BzlLoadValue.Key key, StarlarkSemantics semantics, Environment env)
throws InterruptedException {
if (key.isBuiltins() && !semantics.getBool(BuildLanguageOptions.ENABLE_BZLMOD)) {
boolean bzlmod = semantics.getBool(BuildLanguageOptions.ENABLE_BZLMOD);
if (key.isBuiltins() && !bzlmod) {
// Without Bzlmod, builtins .bzls never have a repo mapping defined for them, so return
// without requesting a RepositoryMappingValue. (NB: In addition to being a slight
// optimization, this avoids adding a reverse dependency on the special //external package,
Expand All @@ -862,21 +866,37 @@ private static RepositoryMapping getRepositoryMapping(
if (key instanceof BzlLoadValue.KeyForWorkspace) {
// Still during workspace file evaluation
BzlLoadValue.KeyForWorkspace keyForWorkspace = (BzlLoadValue.KeyForWorkspace) key;
RepositoryMapping pureWorkspaceMapping;
if (keyForWorkspace.getWorkspaceChunk() == 0) {
// There is no previous workspace chunk
return RepositoryMapping.ALWAYS_FALLBACK;
pureWorkspaceMapping = RepositoryMapping.ALWAYS_FALLBACK;
} else {
SkyKey workspaceFileKey =
WorkspaceFileValue.key(
keyForWorkspace.getWorkspacePath(), keyForWorkspace.getWorkspaceChunk() - 1);
WorkspaceFileValue workspaceFileValue = (WorkspaceFileValue) env.getValue(workspaceFileKey);
// Note: we know for sure that the requested WorkspaceFileValue is fully computed so we do
// not need to check if it is null
return RepositoryMapping.createAllowingFallback(
workspaceFileValue.getRepositoryMapping().getOrDefault(repoName, ImmutableMap.of()));
// NOTE(wyv): this means that, in the WORKSPACE file, we can't load from a repo generated by
// bzlmod. If that's a problem, we should "fall back" to the bzlmod case below.
pureWorkspaceMapping =
RepositoryMapping.createAllowingFallback(
workspaceFileValue
.getRepositoryMapping()
.getOrDefault(repoName, ImmutableMap.of()));
}
if (!bzlmod) {
// Without Bzlmod, we just return the mapping purely computed from WORKSPACE stuff.
return pureWorkspaceMapping;
}
// If Bzlmod is in play, we need to make sure that pure WORKSPACE mapping is composed with the
// root module's mapping (just like how all WORKSPACE repos can see what the root module sees
// _after_ WORKSPACE evaluation).
RepositoryMappingValue rootModuleMappingValue =
(RepositoryMappingValue)
env.getValue(RepositoryMappingValue.KEY_FOR_ROOT_MODULE_WITHOUT_WORKSPACE_REPOS);
if (rootModuleMappingValue == null) {
return null;
}
return pureWorkspaceMapping.composeWith(rootModuleMappingValue.getRepositoryMapping());
}

if (key instanceof BzlLoadValue.KeyForBzlmod) {
Expand All @@ -903,9 +923,8 @@ private static RepositoryMapping getRepositoryMapping(
}
}

// This is either a .bzl loaded from BUILD files, or a .bzl loaded for bzlmod (in which case the
// .bzl file *has* to be from a Bazel module anyway). So we can just use the full repo mapping
// from RepositoryMappingFunction.
// This is either a .bzl loaded from BUILD files, or a .bzl loaded for bzlmod, so we can just
// use the full repo mapping from RepositoryMappingFunction.
RepositoryMappingValue repositoryMappingValue =
(RepositoryMappingValue) env.getValue(RepositoryMappingValue.key(repoName));
if (repositoryMappingValue == null) {
Expand Down
20 changes: 5 additions & 15 deletions src/main/java/com/google/devtools/build/lib/skyframe/RepositoryMappingFunction.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,6 @@
package com.google.devtools.build.lib.skyframe;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import com.google.devtools.build.lib.bazel.bzlmod.BazelModuleResolutionValue;
import com.google.devtools.build.lib.bazel.bzlmod.ModuleExtensionId;
import com.google.devtools.build.lib.bazel.bzlmod.ModuleKey;
Expand Down Expand Up @@ -213,26 +212,17 @@ private SkyValue computeFromWorkspace(
if (externalPackage.containsErrors()) {
throw new RepositoryMappingFunctionException();
}
RepositoryMapping workspaceMapping =
RepositoryMapping.createAllowingFallback(
externalPackage.getRepositoryMapping(repositoryName));
if (rootModuleRepoMapping == null) {
// This means Bzlmod is disabled.
return RepositoryMappingValue.withMapping(
RepositoryMapping.createAllowingFallback(
externalPackage.getRepositoryMapping(repositoryName)));
return RepositoryMappingValue.withMapping(workspaceMapping);
}
// If Bzlmod is in play, we need to make sure that WORKSPACE repos see all repos that root
// module can see, taking care to compose the existing WORKSPACE mapping with the main repo
// mapping from Bzlmod.
return RepositoryMappingValue.withMapping(
RepositoryMapping.createAllowingFallback(
Maps.transformValues(
externalPackage.getRepositoryMapping(repositoryName),
toRepo -> {
RepositoryName mappedName = rootModuleRepoMapping.get(toRepo.getName());
// If the Bzlmod-only main repo mapping doesn't contain this repo, don't touch
// it.
return mappedName.isVisible() ? mappedName : toRepo;
}))
.withAdditionalMappings(rootModuleRepoMapping));
return RepositoryMappingValue.withMapping(workspaceMapping.composeWith(rootModuleRepoMapping));
}

private static Optional<ModuleExtensionId> maybeGetModuleExtensionForRepo(
Expand Down
23 changes: 16 additions & 7 deletions src/main/java/com/google/devtools/build/lib/skyframe/WorkspaceFileFunction.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -120,14 +120,14 @@ public SkyValue compute(SkyKey skyKey, Environment env)
RepositoryDelegatorFunction.RESOLVED_FILE_INSTEAD_OF_WORKSPACE.get(env));
boolean useWorkspaceResolvedFile = resolvedFile.isPresent();

final boolean bzlmod = starlarkSemantics.getBool(BuildLanguageOptions.ENABLE_BZLMOD);
boolean useWorkspaceBzlmodFile = false;
RootedPath workspaceBzlmodFile =
RootedPath.toRootedPath(
workspaceFile.getRoot(),
workspaceFile.getRootRelativePath().replaceName("WORKSPACE.bzlmod"));
// We only need to check WORKSPACE.bzlmod when the resolved file isn't used.
if (!useWorkspaceResolvedFile
&& starlarkSemantics.getBool(BuildLanguageOptions.ENABLE_BZLMOD)) {
if (!useWorkspaceResolvedFile && bzlmod) {
FileValue workspaceBzlmodFileValue =
(FileValue) env.getValue(FileValue.key(workspaceBzlmodFile));
if (workspaceBzlmodFileValue == null) {
Expand Down Expand Up @@ -266,6 +266,15 @@ public SkyValue compute(SkyKey skyKey, Environment env)
.getRepositoryMapping()
.getOrDefault(RepositoryName.MAIN, ImmutableMap.of()));
}
if (bzlmod) {
RepositoryMappingValue rootModuleMapping =
(RepositoryMappingValue)
env.getValue(RepositoryMappingValue.KEY_FOR_ROOT_MODULE_WITHOUT_WORKSPACE_REPOS);
if (rootModuleMapping == null) {
return null;
}
repoMapping = repoMapping.composeWith(rootModuleMapping.getRepositoryMapping());
}

Package.Builder builder =
packageFactory.newExternalPackageBuilder(
Expand All @@ -274,12 +283,12 @@ public SkyValue compute(SkyKey skyKey, Environment env)
if (chunks.isEmpty()) {
return new WorkspaceFileValue(
buildAndReportEvents(builder, env),
/* loadedModules = */ ImmutableMap.<String, Module>of(),
/* loadToChunkMap = */ ImmutableMap.<String, Integer>of(),
/* bindings = */ ImmutableMap.<String, Object>of(),
/* loadedModules= */ ImmutableMap.<String, Module>of(),
/* loadToChunkMap= */ ImmutableMap.<String, Integer>of(),
/* bindings= */ ImmutableMap.<String, Object>of(),
workspaceFile,
/* idx = */ 0, // first fragment
/* hasNext = */ false);
/* idx= */ 0, // first fragment
/* hasNext= */ false);
}

List<StarlarkFile> chunk = chunks.get(key.getIndex());
Expand Down
32 changes: 31 additions & 1 deletion src/test/java/com/google/devtools/build/lib/cmdline/RepositoryMappingTest.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ public void neverFallback() throws Exception {
}

@Test
public void additionalMappings() throws Exception {
public void additionalMappings_basic() throws Exception {
RepositoryMapping mapping =
RepositoryMapping.create(
ImmutableMap.of("A", RepositoryName.create("com_foo_bar_a")),
Expand All @@ -59,4 +59,34 @@ public void additionalMappings() throws Exception {
.isEqualTo(
RepositoryName.create("C").toNonVisible(RepositoryName.create("fake_owner_repo")));
}

@Test
public void additionalMappings_precedence() throws Exception {
RepositoryMapping mapping =
RepositoryMapping.createAllowingFallback(ImmutableMap.of("A", RepositoryName.create("A1")))
.withAdditionalMappings(ImmutableMap.of("A", RepositoryName.create("A2")));
assertThat(mapping.get("A")).isEqualTo(RepositoryName.create("A1"));
}

@Test
public void composeWith() throws Exception {
RepositoryMapping mapping =
RepositoryMapping.createAllowingFallback(
ImmutableMap.of(
"A", RepositoryName.create("A_mapped"), "B", RepositoryName.create("B_mapped")))
.composeWith(
RepositoryMapping.create(
ImmutableMap.of(
"A",
RepositoryName.create("A_mapped_differently"),
"A_mapped",
RepositoryName.create("A_mapped_twice"),
"C",
RepositoryName.create("C_mapped")),
RepositoryName.create("blah")));
assertThat(mapping.get("A")).isEqualTo(RepositoryName.create("A_mapped_twice"));
assertThat(mapping.get("B")).isEqualTo(RepositoryName.create("B_mapped"));
assertThat(mapping.get("C")).isEqualTo(RepositoryName.create("C_mapped"));
assertThat(mapping.get("D")).isEqualTo(RepositoryName.create("D"));
}
}
1 change: 1 addition & 0 deletions src/test/java/com/google/devtools/build/lib/rules/repository/BUILD
View file
Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@ java_library(
"//src/main/java/com/google/devtools/build/lib/skyframe:package_lookup_function",
"//src/main/java/com/google/devtools/build/lib/skyframe:precomputed_function",
"//src/main/java/com/google/devtools/build/lib/skyframe:precomputed_value",
"//src/main/java/com/google/devtools/build/lib/skyframe:repository_mapping_function",
"//src/main/java/com/google/devtools/build/lib/skyframe:sky_functions",
"//src/main/java/com/google/devtools/build/lib/skyframe:skyframe_cluster",
"//src/main/java/com/google/devtools/build/lib/starlarkbuildapi/repository",
Expand Down
2 changes: 2 additions & 0 deletions src/test/java/com/google/devtools/build/lib/rules/repository/RepositoryDelegatorTest.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,7 @@
import com.google.devtools.build.lib.skyframe.PackageLookupFunction.CrossRepositoryLabelViolationStrategy;
import com.google.devtools.build.lib.skyframe.PrecomputedFunction;
import com.google.devtools.build.lib.skyframe.PrecomputedValue;
import com.google.devtools.build.lib.skyframe.RepositoryMappingFunction;
import com.google.devtools.build.lib.skyframe.SkyFunctions;
import com.google.devtools.build.lib.skyframe.WorkspaceFileFunction;
import com.google.devtools.build.lib.starlarkbuildapi.repository.RepositoryBootstrap;
Expand Down Expand Up @@ -220,6 +221,7 @@ public void setupDelegator() throws Exception {
new IgnoredPackagePrefixesFunction(
/*ignoredPackagePrefixesFile=*/ PathFragment.EMPTY_FRAGMENT))
.put(SkyFunctions.RESOLVED_HASH_VALUES, new ResolvedHashesFunction())
.put(SkyFunctions.REPOSITORY_MAPPING, new RepositoryMappingFunction())
.put(
SkyFunctions.MODULE_FILE,
new ModuleFileFunction(registryFactory, rootPath, ImmutableMap.of()))
Expand Down
28 changes: 16 additions & 12 deletions src/test/java/com/google/devtools/build/lib/skyframe/RepositoryMappingFunctionTest.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -62,25 +62,29 @@ private EvaluationResult<RepositoryMappingValue> eval(SkyKey key)
ModifiedFileSet.builder().modify(PathFragment.create("WORKSPACE")).build(),
Root.fromPath(rootDirectory));
return SkyframeExecutorTestUtils.evaluate(
getSkyframeExecutor(), key, /*keepGoing=*/ false, reporter);
getSkyframeExecutor(), key, /* keepGoing= */ false, reporter);
}

@Before
public void setUpForBzlmod() throws Exception {
setBuildLanguageOptions("--enable_bzlmod");
scratch.file("MODULE.bazel");
}

@Override
protected ImmutableList<PrecomputedValue.Injected> extraPrecomputedValues() throws Exception {
registry = FakeRegistry.DEFAULT_FACTORY.newFakeRegistry(scratch.dir("modules").getPathString());
ModuleFileFunction.REGISTRIES.set(
getSkyframeExecutor().getDifferencerForTesting(), ImmutableList.of(registry.getUrl()));
ModuleFileFunction.IGNORE_DEV_DEPS.set(getSkyframeExecutor().getDifferencerForTesting(), false);
ModuleFileFunction.MODULE_OVERRIDES.set(
getSkyframeExecutor().getDifferencerForTesting(), ImmutableMap.of());
BazelModuleResolutionFunction.ALLOWED_YANKED_VERSIONS.set(
getSkyframeExecutor().getDifferencerForTesting(), ImmutableList.of());
BazelModuleResolutionFunction.CHECK_DIRECT_DEPENDENCIES.set(
getSkyframeExecutor().getDifferencerForTesting(), CheckDirectDepsMode.WARNING);
BazelModuleResolutionFunction.BAZEL_COMPATIBILITY_MODE.set(
getSkyframeExecutor().getDifferencerForTesting(), BazelCompatibilityMode.ERROR);
return ImmutableList.of(
PrecomputedValue.injected(
ModuleFileFunction.REGISTRIES, ImmutableList.of(registry.getUrl())),
PrecomputedValue.injected(ModuleFileFunction.IGNORE_DEV_DEPS, false),
PrecomputedValue.injected(ModuleFileFunction.MODULE_OVERRIDES, ImmutableMap.of()),
PrecomputedValue.injected(
BazelModuleResolutionFunction.ALLOWED_YANKED_VERSIONS, ImmutableList.of()),
PrecomputedValue.injected(
BazelModuleResolutionFunction.CHECK_DIRECT_DEPENDENCIES, CheckDirectDepsMode.WARNING),
PrecomputedValue.injected(
BazelModuleResolutionFunction.BAZEL_COMPATIBILITY_MODE, BazelCompatibilityMode.ERROR));
}

@Override
Expand Down
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