/
BlackStep.java
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/
BlackStep.java
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/*
* Copyright 2020-2024 DiffPlug
*
* 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.diffplug.spotless.python;
import java.io.IOException;
import java.io.Serializable;
import java.nio.charset.StandardCharsets;
import java.util.Objects;
import java.util.regex.Pattern;
import javax.annotation.Nullable;
import com.diffplug.spotless.ForeignExe;
import com.diffplug.spotless.FormatterFunc;
import com.diffplug.spotless.FormatterStep;
import com.diffplug.spotless.ProcessRunner;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
public class BlackStep {
public static String name() {
return "black";
}
public static String defaultVersion() {
return "22.3.0";
}
private final String version;
private final @Nullable String pathToExe;
private BlackStep(String version, @Nullable String pathToExe) {
this.version = version;
this.pathToExe = pathToExe;
}
public static BlackStep withVersion(String version) {
return new BlackStep(version, null);
}
public BlackStep withPathToExe(String pathToExe) {
return new BlackStep(version, pathToExe);
}
public FormatterStep create() {
return FormatterStep.createLazy(name(), this::createState, RoundtripState::state, State::toFunc);
}
private RoundtripState createState() {
String trackingIssue = "\n github issue to handle this better: https://github.com/diffplug/spotless/issues/674";
ForeignExe exeAbsPath = ForeignExe.nameAndVersion("black", version)
.pathToExe(pathToExe)
.versionRegex(Pattern.compile("(?:black, version|black,|version) (\\S*)"))
.fixCantFind("Try running {@code pip install black=={version}}, or else tell Spotless where it is with {@code black().pathToExe('path/to/executable')}" + trackingIssue)
.fixWrongVersion("Try running {@code pip install --force-reinstall black=={version}}, or else specify {@code black('{versionFound}')} to Spotless" + trackingIssue);
return new RoundtripState(version, exeAbsPath);
}
static class RoundtripState implements Serializable {
private static final long serialVersionUID = 1L;
final String version;
final ForeignExe exe;
RoundtripState(String version, ForeignExe exe) {
this.version = version;
this.exe = exe;
}
private State state() {
return new State(version, exe);
}
}
@SuppressFBWarnings("SE_TRANSIENT_FIELD_NOT_RESTORED")
static class State implements Serializable {
private static final long serialVersionUID = -1825662356883926318L;
// used for up-to-date checks and caching
final String version;
final transient ForeignExe exe;
// used for executing
private transient @Nullable String[] args;
State(String version, ForeignExe exeAbsPath) {
this.version = version;
this.exe = Objects.requireNonNull(exeAbsPath);
}
String format(ProcessRunner runner, String input) throws IOException, InterruptedException {
if (args == null) {
args = new String[]{exe.confirmVersionAndGetAbsolutePath(), "-"};
}
return runner.exec(input.getBytes(StandardCharsets.UTF_8), args).assertExitZero(StandardCharsets.UTF_8);
}
FormatterFunc.Closeable toFunc() {
ProcessRunner runner = new ProcessRunner();
return FormatterFunc.Closeable.of(runner, this::format);
}
}
}