// Derived from http://stackoverflow.com/a/3054692/250076
public static File getRelativeFile(File targetFile, File baseFile) {
try {
targetFile = targetFile.getCanonicalFile();
baseFile = baseFile.getCanonicalFile();
} catch (IOException ignored) {
}
String pathSeparator = File.separator;
String basePath = baseFile.getAbsolutePath();
String normalizedTargetPath = normalize(targetFile.getAbsolutePath(), pathSeparator);
String normalizedBasePath = normalize(basePath, pathSeparator);
String[] base = normalizedBasePath.split(Pattern.quote(pathSeparator));
String[] target = normalizedTargetPath.split(Pattern.quote(pathSeparator));
StringBuilder common = new StringBuilder();
int commonIndex = 0;
while (commonIndex < target.length
&& commonIndex < base.length
&& target[commonIndex].equals(base[commonIndex])) {
common.append(target[commonIndex]).append(pathSeparator);
commonIndex++;
}
if (commonIndex == 0) {
throw new Error(
"No common path element found for '"
+ normalizedTargetPath
+ "' and '"
+ normalizedBasePath
+ '\'');
}
boolean baseIsFile = true;
if (baseFile.exists()) {
baseIsFile = baseFile.isFile();
} else if (basePath.endsWith(pathSeparator)) {
baseIsFile = false;
}
StringBuilder relative = new StringBuilder();
if (base.length != commonIndex) {
int numDirsUp = baseIsFile ? base.length - commonIndex - 1 : base.length - commonIndex;
for (int i = 0; i < numDirsUp; i++) {
relative.append("..").append(pathSeparator);
}
}
relative.append(normalizedTargetPath.substring(common.length()));
return new File(relative.toString());
}
@Nullable
static ClassLoader createPluginClassLoader(
@NotNull File[] classPath,
@NotNull ClassLoader[] parentLoaders,
@NotNull IdeaPluginDescriptor pluginDescriptor) {
if (pluginDescriptor.getUseIdeaClassLoader()) {
try {
final ClassLoader loader = PluginManagerCore.class.getClassLoader();
final Method addUrlMethod = getAddUrlMethod(loader);
for (File aClassPath : classPath) {
final File file = aClassPath.getCanonicalFile();
addUrlMethod.invoke(loader, file.toURI().toURL());
}
return loader;
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
PluginId pluginId = pluginDescriptor.getPluginId();
File pluginRoot = pluginDescriptor.getPath();
// if (classPath.length == 0) return null;
if (isUnitTestMode()) return null;
try {
final List<URL> urls = new ArrayList<URL>(classPath.length);
for (File aClassPath : classPath) {
final File file =
aClassPath
.getCanonicalFile(); // it is critical not to have "." and ".." in classpath
// elements
urls.add(file.toURI().toURL());
}
return new PluginClassLoader(
urls, parentLoaders, pluginId, pluginDescriptor.getVersion(), pluginRoot);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}