com.google.javascript.jscomp.DependencyOptions Maven / Gradle / Ivy
/*
* Copyright 2011 The Closure Compiler Authors.
*
* 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.
*/
package com.google.javascript.jscomp;
import static com.google.common.base.Preconditions.checkState;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.errorprone.annotations.Immutable;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Nullable;
/**
* Options for how to manage dependencies between input files.
*
* Dependency information is pulled out from the JS code by looking for import and export
* primitives (like ES import and export statements, Closure Library's goog.module, goog.provide and
* goog.require calls, or CommonJS require calls). The compiler can optionally use this information
* to sort input files in dependency order and/or prune unnecessary input files.
*
*
Also see {@link CodingConvention#extractClassNameIfProvide(Node, Node)} and {@link
* CodingConvention#extractClassNameIfRequire(Node, Node)}, which affect what the compiler considers
* to be goog.provide and goog.require statements.
*
* @author [email protected] (Nick Santos)
*/
@AutoValue
@Immutable
public abstract class DependencyOptions implements Serializable {
/** Describes how the compiler should manage dependencies. */
public enum DependencyMode {
/** All input files will be included in the compilation in the order they were specified in. */
NONE,
/** All input files will be included in the compilation in dependency order. */
SORT_ONLY,
/**
* Input files that are transitive dependencies of the entry points will be included in the
* compilation in dependency order. All other input files will be dropped.
*
*
In addition to the explicitly defined entry points, moochers (see below) are implicit
* entry points.
*/
PRUNE_LEGACY,
/**
* Input files that are transitive dependencies of the entry points will be included in the
* compilation in dependency order. All other input files will be dropped.
*
*
All entry points must be explicitly defined.
*/
PRUNE;
}
/** Returns the dependency management mode. */
public abstract DependencyMode getMode();
/** Returns the list of explicit entry points. */
public abstract ImmutableList getEntryPoints();
/** Returns whether dependency management is enabled. */
public boolean needsManagement() {
return getMode() != DependencyMode.NONE;
}
/**
* Returns whether files should be sorted.
*
* If true, the input files should be sorted in dependency order. Otherwise, input files should
* not be reordered.
*/
public boolean shouldSort() {
return getMode() != DependencyMode.NONE;
}
/**
* Returns whether files should be pruned.
*
*
If true, an input file should be excluded from the compilation if it is not a transitive
* dependency of an entry point. Otherwise, all input files should be included.
*/
public boolean shouldPrune() {
return getMode() == DependencyMode.PRUNE_LEGACY || getMode() == DependencyMode.PRUNE;
}
/**
* Returns whether moochers should be dropped.
*
*
A moocher is a strong file that does not goog.provide a namespace and is not a goog.module,
* ES module or CommonJS module. Weak files are never considered moochers.
*
*
If true, moochers should not be considered implicit entry points.
*/
public boolean shouldDropMoochers() {
return getMode() == DependencyMode.PRUNE;
}
/** Returns a {@link DependencyOptions} using the {@link DependencyMode#NONE} mode. */
public static DependencyOptions none() {
return new AutoValue_DependencyOptions(DependencyMode.NONE, ImmutableList.of());
}
/** Returns a {@link DependencyOptions} using the {@link DependencyMode#SORT_ONLY} mode. */
public static DependencyOptions sortOnly() {
return new AutoValue_DependencyOptions(DependencyMode.SORT_ONLY, ImmutableList.of());
}
/**
* Returns a {@link DependencyOptions} using the {@link DependencyMode#PRUNE_LEGACY} mode with the
* given entry points.
*
* @deprecated Prefer {@link #pruneForEntryPoints(Iterable)} with a complete list of entry points.
*/
@Deprecated
public static DependencyOptions pruneLegacyForEntryPoints(
Iterable entryPoints) {
return new AutoValue_DependencyOptions(
DependencyMode.PRUNE_LEGACY, ImmutableList.copyOf(entryPoints));
}
/**
* Returns a {@link DependencyOptions} using the {@link DependencyMode#PRUNE} mode with the given
* entry points.
*/
public static DependencyOptions pruneForEntryPoints(Iterable entryPoints) {
checkState(
!Iterables.isEmpty(entryPoints), "DependencyMode.PRUNE requires at least one entry point");
return new AutoValue_DependencyOptions(DependencyMode.PRUNE, ImmutableList.copyOf(entryPoints));
}
/**
* A helper function for validating dependency management flags and converting them into a {@link
* DependencyOptions} object.
*
* Returns null when no dependency management flags have been specified.
*
*
TODO(tjgq): Simplify this once we deprecate and remove all legacy flags and standardize on
* --dependency_mode and --entry_point.
*/
@Nullable
public static DependencyOptions fromFlags(
@Nullable DependencyMode dependencyModeFlag,
List entryPointFlag,
List closureEntryPointFlag,
String commonJsEntryModuleFlag,
boolean manageClosureDependenciesFlag,
boolean onlyClosureDependenciesFlag) {
boolean hasEntryPoint =
commonJsEntryModuleFlag != null
|| !entryPointFlag.isEmpty()
|| !closureEntryPointFlag.isEmpty();
if (!hasEntryPoint && onlyClosureDependenciesFlag) {
throw new FlagUsageException("--only_closure_dependencies requires --entry_point.");
}
if (!hasEntryPoint && dependencyModeFlag == DependencyMode.PRUNE) {
throw new FlagUsageException("--dependency_mode=PRUNE requires --entry_point.");
}
if (hasEntryPoint
&& (dependencyModeFlag == DependencyMode.NONE
|| dependencyModeFlag == DependencyMode.SORT_ONLY)) {
throw new FlagUsageException(
"--dependency_mode="
+ dependencyModeFlag
+ " cannot be used with --entry_point, --closure_entry_point or "
+ "--common_js_entry_module.");
}
if (!entryPointFlag.isEmpty() && !closureEntryPointFlag.isEmpty()) {
throw new FlagUsageException("--closure_entry_point cannot be used with --entry_point.");
}
if (commonJsEntryModuleFlag != null
&& (!entryPointFlag.isEmpty() || !closureEntryPointFlag.isEmpty())) {
throw new FlagUsageException(
"--common_js_entry_module cannot be used with either --entry_point or "
+ "--closure_entry_point.");
}
if (manageClosureDependenciesFlag && onlyClosureDependenciesFlag) {
throw new FlagUsageException(
"--only_closure_dependencies cannot be used with --manage_closure_dependencies.");
}
if (manageClosureDependenciesFlag && dependencyModeFlag != null) {
throw new FlagUsageException(
"--manage_closure_dependencies cannot be used with --dependency_mode.");
}
if (onlyClosureDependenciesFlag && dependencyModeFlag != null) {
throw new FlagUsageException(
"--only_closure_dependencies cannot be used with --dependency_mode.");
}
DependencyMode dependencyMode;
if (dependencyModeFlag == DependencyMode.PRUNE || onlyClosureDependenciesFlag) {
dependencyMode = DependencyMode.PRUNE;
} else if (dependencyModeFlag == DependencyMode.PRUNE_LEGACY
|| manageClosureDependenciesFlag
|| hasEntryPoint) {
dependencyMode = DependencyMode.PRUNE_LEGACY;
} else if (dependencyModeFlag != null) {
dependencyMode = dependencyModeFlag;
} else {
return null;
}
ImmutableList.Builder entryPointsBuilder = ImmutableList.builder();
if (commonJsEntryModuleFlag != null) {
entryPointsBuilder.add(ModuleIdentifier.forFile(commonJsEntryModuleFlag));
}
for (String entryPoint : entryPointFlag) {
entryPointsBuilder.add(ModuleIdentifier.forFlagValue(entryPoint));
}
for (String closureEntryPoint : closureEntryPointFlag) {
entryPointsBuilder.add(ModuleIdentifier.forClosure(closureEntryPoint));
}
switch (dependencyMode) {
case NONE:
return DependencyOptions.none();
case SORT_ONLY:
return DependencyOptions.sortOnly();
case PRUNE_LEGACY:
return DependencyOptions.pruneLegacyForEntryPoints(entryPointsBuilder.build());
case PRUNE:
return DependencyOptions.pruneForEntryPoints(entryPointsBuilder.build());
}
throw new AssertionError("Invalid DependencyMode");
}
}