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Optionally skip execution if repository is shallow
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149
...nse-maven-plugin/src/main/java/com/mycila/maven/plugin/license/util/ExecutingCommand.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| /* | ||
| * Copyright (C) 2008-2021 Mycila ([email protected]) | ||
| * | ||
| * 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.mycila.maven.plugin.license.util; | ||
|
|
||
| import java.io.BufferedReader; | ||
| import java.io.IOException; | ||
| import java.io.InputStreamReader; | ||
| import java.nio.charset.Charset; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
|
|
||
| /** | ||
| * A class for executing on the command line and returning the result of | ||
| * execution. | ||
| */ | ||
| public final class ExecutingCommand { | ||
|
|
||
| private static final boolean IS_WINDOWS = System.getProperty("os.name").startsWith("Windows"); | ||
| private static final boolean IS_SOLARIS = !IS_WINDOWS | ||
| && (System.getProperty("os.name").startsWith("Solaris") || System.getProperty("os.name").startsWith("SunOS")); | ||
| private static final String[] DEFAULT_ENV = getDefaultEnv(); | ||
|
|
||
| private ExecutingCommand() { | ||
| } | ||
|
|
||
| private static String[] getDefaultEnv() { | ||
| if (IS_WINDOWS) { | ||
| return new String[] { "LANGUAGE=C" }; | ||
| } else { | ||
| return new String[] { "LC_ALL=C" }; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Executes a command on the native command line and returns the result. This is | ||
| * a convenience method to call {@link java.lang.Runtime#exec(String)} and | ||
| * capture the resulting output in a list of Strings. On Windows, built-in | ||
| * commands not associated with an executable program may require | ||
| * {@code cmd.exe /c} to be prepended to the command. | ||
| * | ||
| * @param cmdToRun | ||
| * Command to run | ||
| * @return A list of Strings representing the result of the command, or empty | ||
| * list if the command failed | ||
| */ | ||
| public static List<String> runNative(String cmdToRun) { | ||
| String[] cmd = cmdToRun.split(" "); | ||
| return runNative(cmd); | ||
| } | ||
|
|
||
| /** | ||
| * Executes a command on the native command line and returns the result line by | ||
| * line. This is a convenience method to call | ||
| * {@link java.lang.Runtime#exec(String[])} and capture the resulting output in | ||
| * a list of Strings. On Windows, built-in commands not associated with an | ||
| * executable program may require the strings {@code cmd.exe} and {@code /c} to | ||
| * be prepended to the array. | ||
| * | ||
| * @param cmdToRunWithArgs | ||
| * Command to run and args, in an array | ||
| * @return A list of Strings representing the result of the command, or empty | ||
| * list if the command failed | ||
| */ | ||
| public static List<String> runNative(String[] cmdToRunWithArgs) { | ||
| return runNative(cmdToRunWithArgs, DEFAULT_ENV); | ||
| } | ||
|
|
||
| /** | ||
| * Executes a command on the native command line and returns the result line by | ||
| * line. This is a convenience method to call | ||
| * {@link java.lang.Runtime#exec(String[])} and capture the resulting output in | ||
| * a list of Strings. On Windows, built-in commands not associated with an | ||
| * executable program may require the strings {@code cmd.exe} and {@code /c} to | ||
| * be prepended to the array. | ||
| * | ||
| * @param cmdToRunWithArgs | ||
| * Command to run and args, in an array | ||
| * @param envp | ||
| * array of strings, each element of which has environment variable | ||
| * settings in the format name=value, or null if the subprocess should | ||
| * inherit the environment of the current process. | ||
| * @return A list of Strings representing the result of the command, or empty | ||
| * list if the command failed | ||
| */ | ||
| public static List<String> runNative(String[] cmdToRunWithArgs, String[] envp) { | ||
| Process p = null; | ||
| try { | ||
| p = Runtime.getRuntime().exec(cmdToRunWithArgs, envp); | ||
| return getProcessOutput(p, cmdToRunWithArgs); | ||
| } catch (SecurityException | IOException e) { | ||
| return Collections.emptyList(); | ||
| } finally { | ||
| // Ensure all resources are released if exec fails | ||
| if (p != null) { | ||
| // Windows and Solaris don't close descriptors on destroy, | ||
| // so we must handle separately | ||
| if (IS_WINDOWS || IS_SOLARIS) { | ||
| try { | ||
| p.getOutputStream().close(); | ||
| } catch (IOException e) { | ||
| // do nothing on failure | ||
| } | ||
| try { | ||
| p.getInputStream().close(); | ||
| } catch (IOException e) { | ||
| // do nothing on failure | ||
| } | ||
| try { | ||
| p.getErrorStream().close(); | ||
| } catch (IOException e) { | ||
| // do nothing on failure | ||
| } | ||
| } | ||
| p.destroy(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private static List<String> getProcessOutput(Process p, String[] cmd) { | ||
| ArrayList<String> sa = new ArrayList<>(); | ||
| try (BufferedReader reader = new BufferedReader( | ||
| new InputStreamReader(p.getInputStream(), Charset.defaultCharset()))) { | ||
| String line; | ||
| while ((line = reader.readLine()) != null) { | ||
| sa.add(line); | ||
| } | ||
| p.waitFor(); | ||
| } catch (IOException e) { | ||
| return Collections.emptyList(); | ||
| } catch (InterruptedException ie) { | ||
| Thread.currentThread().interrupt(); | ||
| } | ||
| return sa; | ||
| } | ||
| } |