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Beautify kotlinc -help output

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This commit is contained in:
Alexander Udalov
2014-06-23 16:46:21 +04:00
parent 5e994778d1
commit ca219f9880
11 changed files with 226 additions and 192 deletions
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compiler/cli/src/org/jetbrains/jet/cli/common/Usage.java
+25 -61
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@@ -20,94 +20,58 @@ import com.sampullara.cli.Argument;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.jet.cli.common.arguments.CommonCompilerArguments;
import org.jetbrains.jet.cli.common.arguments.ValueDescription;
import java.io.PrintStream;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
class Usage {
private final PrintStream out;
private Usage(@NotNull PrintStream out) {
this.out = out;
}
// The magic number 29 corresponds to the similar padding width in javac and scalac command line compilers
private static final int OPTION_NAME_PADDING_WIDTH = 29;
public static void print(@NotNull PrintStream target, @NotNull CommonCompilerArguments arguments) {
new Usage(target).print(arguments);
}
private void print(@NotNull CommonCompilerArguments arguments) {
Class<?> clazz = arguments.getClass();
out.println("Usage: " + clazz.getName());
for (Class<?> currentClass = clazz; currentClass != null; currentClass = currentClass.getSuperclass()) {
for (Field field : currentClass.getDeclaredFields()) {
Argument argument = field.getAnnotation(Argument.class);
if (argument == null) continue;
try {
printFieldUsage(field, field.get(arguments), argument);
}
catch (IllegalAccessException e) {
throw new IllegalArgumentException("Could not use the field " + field + " as an argument field", e);
target.println("Usage: " + arguments.executableScriptFileName() + " <options> <source files>");
target.println("where possible options include:");
for (Class<?> clazz = arguments.getClass(); clazz != null; clazz = clazz.getSuperclass()) {
for (Field field : clazz.getDeclaredFields()) {
String usage = fieldUsage(field);
if (usage != null) {
target.println(usage);
}
}
}
}
private void printFieldUsage(@NotNull Field field, @Nullable Object defaultValue, @NotNull Argument argument) {
@Nullable
private static String fieldUsage(@NotNull Field field) {
Argument argument = field.getAnnotation(Argument.class);
if (argument == null) return null;
ValueDescription description = field.getAnnotation(ValueDescription.class);
String prefix = argument.prefix();
Class<?> type = field.getType();
String description = argument.description();
StringBuilder sb = new StringBuilder(" ");
sb.append(prefix);
if (argument.value().equals("")) {
if (argument.value().isEmpty()) {
sb.append(field.getName());
}
else {
sb.append(argument.value());
}
if (!argument.alias().equals("")) {
if (!argument.alias().isEmpty()) {
sb.append(" (");
sb.append(prefix);
sb.append(argument.alias());
sb.append(")");
}
if (type == Boolean.TYPE || type == Boolean.class) {
sb.append(" [flag] ");
sb.append(description);
if (description != null) {
sb.append(" ");
sb.append(description.value());
}
else {
sb.append(" [");
if (type.isArray()) {
sb.append(type.getComponentType().getSimpleName());
sb.append("[");
sb.append(argument.delimiter());
sb.append("]");
}
else {
sb.append(type.getSimpleName());
}
sb.append("] ");
sb.append(description);
if (defaultValue != null) {
sb.append(" (");
if (type.isArray()) {
int len = Array.getLength(defaultValue);
List<Object> list = new ArrayList<Object>(len);
for (int i = 0; i < len; i++) {
list.add(Array.get(defaultValue, i));
}
sb.append(list);
}
else {
sb.append(defaultValue);
}
sb.append(")");
}
while (sb.length() < OPTION_NAME_PADDING_WIDTH) {
sb.append(" ");
}
out.println(sb);
sb.append(argument.description());
return sb.toString();
}
}