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Merge pull request #672 from diffplug/feat/foreign
Make it easy to integrate native formatters
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| def special = [ | ||
| 'Npm', | ||
| 'Black', | ||
| 'Clang' | ||
| ] | ||
|
|
||
| tasks.named('test') { | ||
| useJUnit { excludeCategories special.collect { "com.diffplug.spotless.category.${it}Test" } as String[] } | ||
| } | ||
|
|
||
| special.forEach { | ||
| def category = "com.diffplug.spotless.category.${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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| /* | ||
| * 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; | ||
|
|
||
| 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; | ||
|
|
||
| // 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; | ||
| } | ||
|
|
||
| /** 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; | ||
| } | ||
|
|
||
| /** Use {version} anywhere you would like to inject the actual version string. */ | ||
| public ForeignExe fixCantFind(String msg) { | ||
| this.fixCantFind = msg; | ||
| return this; | ||
| } | ||
|
|
||
| /** Use {version} or {versionFound} anywhere you would like to inject the actual version strings. */ | ||
| public ForeignExe fixWrongVersion(String msg) { | ||
| this.fixWrongVersion = msg; | ||
| return this; | ||
| } | ||
|
|
||
| /** 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; | ||
| } | ||
|
|
||
| /** | ||
| * 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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