com.google.javascript.jscomp.ModuleIdentifier Maven / Gradle / Ivy
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/*
* Copyright 2016 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 java.lang.Math.min;
import com.google.auto.value.AutoValue;
import com.google.errorprone.annotations.Immutable;
import com.google.javascript.jscomp.deps.ModuleNames;
import java.io.Serializable;
/**
* Basic information on an entry point module.
*
* Closure entry points are namespace names, while ES and CommonJS entry points are file paths
* which are normalized to a namespace name.
*
*
This class allows error messages to be based on the user-provided name rather than the
* normalized name.
*/
@AutoValue
@Immutable
public abstract class ModuleIdentifier implements Serializable {
/** Returns the user-provided name. */
public abstract String getName();
/** Returns the Closure namespace name. */
public abstract String getClosureNamespace();
/** Returns the module name. */
public abstract String getModuleName();
@Override
public final String toString() {
if (getClosureNamespace().equals(getModuleName())) {
return getClosureNamespace();
}
return getModuleName() + ":" + getClosureNamespace();
}
/**
* Returns an identifier for a Closure namespace.
*
* @param name The Closure namespace. It may be in one of the formats `name.space`,
* `goog:name.space` or `goog:moduleName:name.space`, where the latter specifies that the
* module and namespace names are different.
*/
public static ModuleIdentifier forClosure(String name) {
String normalizedName = name;
if (normalizedName.startsWith("goog:")) {
normalizedName = normalizedName.substring("goog:".length());
}
String namespace = normalizedName;
String moduleName = normalizedName;
int splitPoint = normalizedName.indexOf(':');
if (splitPoint != -1) {
moduleName = normalizedName.substring(0, splitPoint);
namespace = normalizedName.substring(min(splitPoint + 1, normalizedName.length() - 1));
}
return new AutoValue_ModuleIdentifier(normalizedName, namespace, moduleName);
}
/**
* Returns an identifier for an ES or CommonJS module.
*
* @param filepath Path to the ES or CommonJS module.
*/
public static ModuleIdentifier forFile(String filepath) {
String normalizedName = ModuleNames.fileToModuleName(filepath);
return new AutoValue_ModuleIdentifier(filepath, normalizedName, normalizedName);
}
/**
* Returns an identifier for an --entry_point flag value.
*
* @param flagValue The flag value. If it is in one of the formats `goog:name.space` or
* `goog:moduleName:name.space`, it is interpreted as a Closure namespace. Otherwise, it is
* interpreted as the path to an ES or CommonJS module.
*/
public static ModuleIdentifier forFlagValue(String flagValue) {
if (flagValue.startsWith("goog:")) {
return ModuleIdentifier.forClosure(flagValue);
} else {
return ModuleIdentifier.forFile(flagValue);
}
}
}