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Merge pull request #672 from diffplug/feat/foreign
Make it easy to integrate native formatters
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def special = [ | ||
'Npm', | ||
'Black', | ||
'Clang' | ||
] | ||
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tasks.named('test') { | ||
useJUnit { excludeCategories special.collect { "com.diffplug.spotless.category.${it}Test" } as String[] } | ||
} | ||
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special.forEach { | ||
def category = "com.diffplug.spotless.category.${it}Test" | ||
tasks.register("${it}Test", Test) { | ||
useJUnit { includeCategories category } | ||
} | ||
} |
135 changes: 135 additions & 0 deletions
135
lib/src/main/java/com/diffplug/spotless/ForeignExe.java
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/* | ||
* Copyright 2020 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; | ||
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import java.io.IOException; | ||
import java.nio.charset.Charset; | ||
import java.util.Objects; | ||
import java.util.regex.Matcher; | ||
import java.util.regex.Pattern; | ||
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import javax.annotation.Nullable; | ||
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/** | ||
* Finds a foreign executable and checks its version. | ||
* If either part of that fails, it shows you why | ||
* and helps you fix it. | ||
* | ||
* Usage: `ForeignExe.nameAndVersion("grep", "2.5.7").confirmVersionAndGetAbsolutePath()` | ||
* will find grep, confirm that it is version 2.5.7, and then return. | ||
*/ | ||
public class ForeignExe { | ||
private @Nullable String pathToExe; | ||
private String versionFlag = "--version"; | ||
private Pattern versionRegex = Pattern.compile("version (\\S*)"); | ||
private @Nullable String fixCantFind, fixWrongVersion; | ||
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// MANDATORY | ||
private String name; | ||
private String version; | ||
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/** The name of the executable, used by "where" (win) and "which" (unix). */ | ||
public static ForeignExe nameAndVersion(String exeName, String version) { | ||
ForeignExe foreign = new ForeignExe(); | ||
foreign.name = Objects.requireNonNull(exeName); | ||
foreign.version = Objects.requireNonNull(version); | ||
return foreign; | ||
} | ||
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/** The flag which causes the exe to print its version (defaults to --version). */ | ||
public ForeignExe versionFlag(String versionFlag) { | ||
this.versionFlag = Objects.requireNonNull(versionFlag); | ||
return this; | ||
} | ||
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/** A regex which can parse the version out of the output of the {@link #versionFlag(String)} command (defaults to `version (\\S*)`) */ | ||
public ForeignExe versionRegex(Pattern versionRegex) { | ||
this.versionRegex = Objects.requireNonNull(versionRegex); | ||
return this; | ||
} | ||
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/** Use {version} anywhere you would like to inject the actual version string. */ | ||
public ForeignExe fixCantFind(String msg) { | ||
this.fixCantFind = msg; | ||
return this; | ||
} | ||
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/** Use {version} or {versionFound} anywhere you would like to inject the actual version strings. */ | ||
public ForeignExe fixWrongVersion(String msg) { | ||
this.fixWrongVersion = msg; | ||
return this; | ||
} | ||
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/** Path to the executable. If null, will search for the executable on the system path. */ | ||
public ForeignExe pathToExe(@Nullable String pathToExe) { | ||
this.pathToExe = pathToExe; | ||
return this; | ||
} | ||
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/** | ||
* Searches for the executable and confirms that it has the expected version. | ||
* If it can't find the executable, or if it doesn't have the correct version, | ||
* throws an exception with a message describing how to fix. | ||
*/ | ||
public String confirmVersionAndGetAbsolutePath() throws IOException, InterruptedException { | ||
try (ProcessRunner runner = new ProcessRunner()) { | ||
String exeAbsPath; | ||
if (pathToExe != null) { | ||
exeAbsPath = pathToExe; | ||
} else { | ||
ProcessRunner.Result cmdWhich = runner.shellWinUnix("where " + name, "which " + name); | ||
if (cmdWhich.exitNotZero()) { | ||
throw cantFind("Unable to find " + name + " on path", cmdWhich); | ||
} else { | ||
exeAbsPath = cmdWhich.assertExitZero(Charset.defaultCharset()).trim(); | ||
} | ||
} | ||
ProcessRunner.Result cmdVersion = runner.exec(exeAbsPath, versionFlag); | ||
if (cmdVersion.exitNotZero()) { | ||
throw cantFind("Unable to run " + exeAbsPath, cmdVersion); | ||
} | ||
Matcher versionMatcher = versionRegex.matcher(cmdVersion.assertExitZero(Charset.defaultCharset())); | ||
if (!versionMatcher.find()) { | ||
throw cantFind("Unable to parse version with /" + versionRegex + "/", cmdVersion); | ||
} | ||
String versionFound = versionMatcher.group(1); | ||
if (!versionFound.equals(version)) { | ||
throw wrongVersion("You specified version " + version + ", but Spotless found " + versionFound, cmdVersion, versionFound); | ||
} | ||
return exeAbsPath; | ||
} | ||
} | ||
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private RuntimeException cantFind(String message, ProcessRunner.Result cmd) { | ||
return exceptionFmt(message, cmd, fixCantFind == null ? null : fixCantFind.replace("{version}", version)); | ||
} | ||
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private RuntimeException wrongVersion(String message, ProcessRunner.Result cmd, String versionFound) { | ||
return exceptionFmt(message, cmd, fixWrongVersion == null ? null : fixWrongVersion.replace("{version}", version).replace("{versionFound}", versionFound)); | ||
} | ||
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private RuntimeException exceptionFmt(String msgPrimary, ProcessRunner.Result cmd, @Nullable String msgFix) { | ||
StringBuilder errorMsg = new StringBuilder(); | ||
errorMsg.append(msgPrimary); | ||
errorMsg.append('\n'); | ||
if (msgFix != null) { | ||
errorMsg.append(msgFix); | ||
errorMsg.append('\n'); | ||
} | ||
errorMsg.append(cmd.toString()); | ||
return new RuntimeException(errorMsg.toString()); | ||
} | ||
} |
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