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org.apache.felix.gogo.jline.Posix Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.felix.gogo.jline;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.Reader;
import java.net.MalformedURLException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.StandardWatchEventKinds;
import java.nio.file.WatchKey;
import java.nio.file.WatchService;
import java.nio.file.attribute.FileTime;
import java.nio.file.attribute.PosixFilePermission;
import java.nio.file.attribute.PosixFilePermissions;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.TreeMap;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
import java.util.function.IntBinaryOperator;
import java.util.function.IntConsumer;
import java.util.function.Predicate;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.felix.gogo.jline.Shell.Context;
import org.apache.felix.service.command.CommandProcessor;
import org.apache.felix.service.command.CommandSession;
import org.apache.felix.service.command.Process;
import org.jline.builtins.Commands;
import org.jline.builtins.Less;
import org.jline.builtins.Nano;
import org.jline.builtins.Options;
import org.jline.builtins.Options.HelpException;
import org.jline.builtins.Source;
import org.jline.builtins.Source.PathSource;
import org.jline.builtins.Source.URLSource;
import org.jline.builtins.TTop;
import org.jline.terminal.Attributes;
import org.jline.terminal.Terminal;
import org.jline.utils.AttributedString;
import org.jline.utils.AttributedStringBuilder;
import org.jline.utils.InfoCmp.Capability;
import org.jline.utils.OSUtils;
import org.jline.utils.StyleResolver;
/**
* Posix-like utilities.
*
* @see
* http://www.opengroup.org/onlinepubs/009695399/utilities/contents.html
*/
public class Posix {
static final String[] functions;
static {
// TTop function is new in JLine 3.2
String[] func;
try {
@SuppressWarnings("unused")
Class cl = TTop.class;
func = new String[] {
"cat", "echo", "grep", "sort", "sleep", "cd", "pwd", "ls",
"less", "watch", "nano", "tmux",
"head", "tail", "clear", "wc",
"date", "ttop",
};
} catch (Throwable t) {
func = new String[] {
"cat", "echo", "grep", "sort", "sleep", "cd", "pwd", "ls",
"less", "watch", "nano", "tmux",
"head", "tail", "clear", "wc",
"date"
};
}
functions = func;
}
public static final String DEFAULT_LS_COLORS = "dr=1;91:ex=1;92:sl=1;96:ot=34;43";
public static final String DEFAULT_GREP_COLORS = "mt=1;31:fn=35:ln=32:se=36";
private static final LinkOption[] NO_FOLLOW_OPTIONS = new LinkOption[]{LinkOption.NOFOLLOW_LINKS};
private static final List WINDOWS_EXECUTABLE_EXTENSIONS = Collections.unmodifiableList(Arrays.asList(".bat", ".exe", ".cmd"));
private static final LinkOption[] EMPTY_LINK_OPTIONS = new LinkOption[0];
private final CommandProcessor processor;
public Posix(CommandProcessor processor) {
this.processor = processor;
}
public void _main(CommandSession session, String[] argv) {
if (argv == null || argv.length < 1) {
throw new IllegalArgumentException();
}
Process process = Process.Utils.current();
try {
run(session, process, argv);
} catch (IllegalArgumentException e) {
process.err().println(e.getMessage());
process.error(2);
} catch (HelpException e) {
HelpException.highlight(e.getMessage(), HelpException.defaultStyle()).print(Shell.getTerminal(session));
process.error(0);
} catch (Exception e) {
process.err().println(argv[0] + ": " + e.toString());
process.error(1);
}
}
protected Options parseOptions(CommandSession session, String[] usage, Object[] argv) throws Exception {
Options opt = Options.compile(usage, s -> get(session, s)).parse(argv, true);
if (opt.isSet("help")) {
throw new HelpException(opt.usage());
}
return opt;
}
protected String get(CommandSession session, String name) {
Object o = session.get(name);
return o != null ? o.toString() : null;
}
protected Object run(CommandSession session, Process process, String[] argv) throws Exception {
switch (argv[0]) {
case "cat":
cat(session, process, argv);
break;
case "echo":
echo(session, process, argv);
break;
case "grep":
grep(session, process, argv);
break;
case "sort":
sort(session, process, argv);
break;
case "sleep":
sleep(session, process, argv);
break;
case "cd":
cd(session, process, argv);
break;
case "pwd":
pwd(session, process, argv);
break;
case "ls":
ls(session, process, argv);
break;
case "less":
less(session, process, argv);
break;
case "watch":
watch(session, process, argv);
break;
case "nano":
nano(session, process, argv);
break;
case "tmux":
tmux(session, process, argv);
break;
case "ttop":
ttop(session, process, argv);
break;
case "clear":
clear(session, process, argv);
break;
case "head":
head(session, process, argv);
break;
case "tail":
tail(session, process, argv);
break;
case "wc":
wc(session, process, argv);
break;
case "date":
date(session, process, argv);
break;
}
return null;
}
protected void date(CommandSession session, Process process, String[] argv) throws Exception {
String[] usage = {
"date - display date",
"Usage: date [-r seconds] [-v[+|-]val[mwdHMS] ...] [-f input_fmt new_date] [+output_fmt]",
" -? --help Show help",
" -u Use UTC",
" -r Print the date represented by 'seconds' since January 1, 1970",
" -f Use 'input_fmt' to parse 'new_date'"
};
Date input = new Date();
String output = null;
for (int i = 1; i < argv.length; i++) {
if ("-?".equals(argv[i]) || "--help".equals(argv[i])) {
throw new HelpException(Options.compile(usage).usage());
}
else if ("-r".equals(argv[i])) {
if (i + 1 < argv.length) {
input = new Date(Long.parseLong(argv[++i]) * 1000L);
} else {
throw new IllegalArgumentException("usage: date [-u] [-r seconds] [-v[+|-]val[mwdHMS] ...] [-f input_fmt new_date] [+output_fmt]");
}
}
else if ("-f".equals(argv[i])) {
if (i + 2 < argv.length) {
String fmt = argv[++i];
String inp = argv[++i];
String jfmt = toJavaDateFormat(fmt);
input = new SimpleDateFormat(jfmt).parse(inp);
} else {
throw new IllegalArgumentException("usage: date [-u] [-r seconds] [-v[+|-]val[mwdHMS] ...] [-f input_fmt new_date] [+output_fmt]");
}
}
else if (argv[i].startsWith("+")) {
if (output == null) {
output = argv[i].substring(1);
} else {
throw new IllegalArgumentException("usage: date [-u] [-r seconds] [-v[+|-]val[mwdHMS] ...] [-f input_fmt new_date] [+output_fmt]");
}
}
else {
throw new IllegalArgumentException("usage: date [-u] [-r seconds] [-v[+|-]val[mwdHMS] ...] [-f input_fmt new_date] [+output_fmt]");
}
}
if (output == null) {
output = "%c";
}
// Print output
process.out().println(new SimpleDateFormat(toJavaDateFormat(output)).format(input));
}
private String toJavaDateFormat(String format) {
// transform Unix format to Java SimpleDateFormat (if required)
StringBuilder sb = new StringBuilder();
boolean quote = false;
for (int i = 0; i < format.length(); i++) {
char c = format.charAt(i);
if (c == '%') {
if (i + 1 < format.length()) {
if (quote) {
sb.append('\'');
quote = false;
}
c = format.charAt(++i);
switch (c) {
case '+':
case 'A': sb.append("MMM EEE d HH:mm:ss yyyy"); break;
case 'a': sb.append("EEE"); break;
case 'B': sb.append("MMMMMMM"); break;
case 'b': sb.append("MMM"); break;
case 'C': sb.append("yy"); break;
case 'c': sb.append("MMM EEE d HH:mm:ss yyyy"); break;
case 'D': sb.append("MM/dd/yy"); break;
case 'd': sb.append("dd"); break;
case 'e': sb.append("dd"); break;
case 'F': sb.append("yyyy-MM-dd"); break;
case 'G': sb.append("YYYY"); break;
case 'g': sb.append("YY"); break;
case 'H': sb.append("HH"); break;
case 'h': sb.append("MMM"); break;
case 'I': sb.append("hh"); break;
case 'j': sb.append("DDD"); break;
case 'k': sb.append("HH"); break;
case 'l': sb.append("hh"); break;
case 'M': sb.append("mm"); break;
case 'm': sb.append("MM"); break;
case 'N': sb.append("S"); break;
case 'n': sb.append("\n"); break;
case 'P': sb.append("aa"); break;
case 'p': sb.append("aa"); break;
case 'r': sb.append("hh:mm:ss aa"); break;
case 'R': sb.append("HH:mm"); break;
case 'S': sb.append("ss"); break;
case 's': sb.append("S"); break;
case 'T': sb.append("HH:mm:ss"); break;
case 't': sb.append("\t"); break;
case 'U': sb.append("w"); break;
case 'u': sb.append("u"); break;
case 'V': sb.append("W"); break;
case 'v': sb.append("dd-MMM-yyyy"); break;
case 'W': sb.append("w"); break;
case 'w': sb.append("u"); break;
case 'X': sb.append("HH:mm:ss"); break;
case 'x': sb.append("MM/dd/yy"); break;
case 'Y': sb.append("yyyy"); break;
case 'y': sb.append("yy"); break;
case 'Z': sb.append("z"); break;
case 'z': sb.append("X"); break;
case '%': sb.append("%"); break;
}
} else {
if (!quote) {
sb.append('\'');
}
sb.append(c);
sb.append('\'');
}
} else {
if ((c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z') && !quote) {
sb.append('\'');
quote = true;
}
sb.append(c);
}
}
return sb.toString();
}
protected void wc(CommandSession session, Process process, String[] argv) throws Exception {
String[] usage = {
"wc - word, line, character, and byte count",
"Usage: wc [OPTIONS] [FILES]",
" -? --help Show help",
" -l --lines Print line counts",
" -c --bytes Print byte counts",
" -m --chars Print character counts",
" -w --words Print word counts",
};
Options opt = parseOptions(session, usage, argv);
List sources = new ArrayList<>();
if (opt.args().isEmpty()) {
opt.args().add("-");
}
for (String arg : opt.args()) {
if ("-".equals(arg)) {
sources.add(new StdInSource(process));
} else {
sources.add(new PathSource(session.currentDir().resolve(arg), arg));
}
}
boolean displayLines = opt.isSet("lines");
boolean displayWords = opt.isSet("words");
boolean displayChars = opt.isSet("chars");
boolean displayBytes = opt.isSet("bytes");
if (!displayLines && !displayWords && !displayChars && !displayBytes) {
displayLines = true;
displayWords = true;
displayBytes = true;
}
String format = "";
if (displayLines) {
if (!displayBytes && !displayChars && !displayWords) {
format = "%1$d";
} else {
format += "%1$8d";
}
}
if (displayWords) {
if (!displayLines && !displayBytes && !displayChars) {
format = "%2$d";
} else {
format += "%2$8d";
}
}
if (displayChars) {
if (!displayLines && !displayBytes && !displayWords) {
format = "%3$d";
} else {
format += "%3$8d";
}
}
if (displayBytes) {
if (!displayLines && !displayChars && !displayWords) {
format = "%4$d";
} else {
format += "%4$8d";
}
}
if (sources.size() > 1 || (sources.size() == 1 && sources.get(0).getName() != null)) {
format += " %5$8s";
}
int totalLines = 0;
int totalBytes = 0;
int totalChars = 0;
int totalWords = 0;
for (Source src : sources) {
try (InputStream is = src.read()) {
AtomicInteger lines = new AtomicInteger();
AtomicInteger bytes = new AtomicInteger();
AtomicInteger chars = new AtomicInteger();
AtomicInteger words = new AtomicInteger();
AtomicBoolean inWord = new AtomicBoolean();
AtomicBoolean lastNl = new AtomicBoolean(true);
InputStream isc = new FilterInputStream(is) {
@Override
public int read() throws IOException {
int b = super.read();
if (b >= 0) {
bytes.incrementAndGet();
}
return b;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int nb = super.read(b, off, len);
if (nb > 0) {
bytes.addAndGet(nb);
}
return nb;
}
};
IntConsumer consumer = cp -> {
chars.incrementAndGet();
boolean ws = Character.isWhitespace(cp);
if (inWord.getAndSet(!ws) && ws) {
words.incrementAndGet();
}
if (cp == '\n') {
lines.incrementAndGet();
lastNl.set(true);
} else {
lastNl.set(false);
}
};
Reader reader = new InputStreamReader(isc);
while (true) {
int h = reader.read();
if (Character.isHighSurrogate((char) h)) {
int l = reader.read();
if (Character.isLowSurrogate((char) l)) {
int cp = Character.toCodePoint((char) h, (char) l);
consumer.accept(cp);
} else {
consumer.accept(h);
if (l >= 0) {
consumer.accept(l);
} else {
break;
}
}
} else if (h >= 0) {
consumer.accept(h);
} else {
break;
}
}
if (inWord.get()) {
words.incrementAndGet();
}
if (!lastNl.get()) {
lines.incrementAndGet();
}
process.out().println(String.format(format, lines.get(), words.get(), chars.get(), bytes.get(), src.getName()));
totalBytes += bytes.get();
totalChars += chars.get();
totalWords += words.get();
totalLines += lines.get();
}
}
if (sources.size() > 1) {
process.out().println(String.format(format, totalLines, totalWords, totalChars, totalBytes, "total"));
}
}
protected void head(CommandSession session, Process process, String[] argv) throws Exception {
String[] usage = {
"head - displays first lines of file",
"Usage: head [-n lines | -c bytes] [file ...]",
" -? --help Show help",
" -n --lines=LINES Print line counts",
" -c --bytes=BYTES Print byte counts",
};
Options opt = parseOptions(session, usage, argv);
if (opt.isSet("lines") && opt.isSet("bytes")) {
throw new IllegalArgumentException("usage: head [-n # | -c #] [file ...]");
}
int nbLines = Integer.MAX_VALUE;
int nbBytes = Integer.MAX_VALUE;
if (opt.isSet("lines")) {
nbLines = opt.getNumber("lines");
} else if (opt.isSet("bytes")) {
nbBytes = opt.getNumber("bytes");
} else {
nbLines = 10;
}
List sources = new ArrayList<>();
if (opt.args().isEmpty()) {
opt.args().add("-");
}
for (String arg : opt.args()) {
if ("-".equals(arg)) {
sources.add(new StdInSource(process));
} else {
sources.add(new PathSource(session.currentDir().resolve(arg), arg));
}
}
for (Source src : sources) {
int bytes = nbBytes;
int lines = nbLines;
if (sources.size() > 1) {
if (src != sources.get(0)) {
process.out().println();
}
process.out().println("==> " + src.getName() + " <==");
}
try (InputStream is = src.read()) {
byte[] buf = new byte[1024];
int nb;
do {
nb = is.read(buf);
if (nb > 0 && lines > 0 && bytes > 0) {
nb = Math.min(nb, bytes);
for (int i = 0; i < nb; i++) {
if (buf[i] == '\n' && --lines <= 0) {
nb = i + 1;
break;
}
}
bytes -= nb;
process.out().write(buf, 0, nb);
}
} while (nb > 0 && lines > 0 && bytes > 0);
}
}
}
protected void tail(CommandSession session, Process process, String[] argv) throws Exception {
String[] usage = {
"tail - displays last lines of file",
"Usage: tail [-f] [-q] [-c # | -n #] [file ...]",
" -? --help Show help",
" -q --quiet Suppress headers when printing multiple sources",
" -f --follow Do not stop at end of file",
" -F --FOLLOW Follow and check for file renaming or rotation",
" -n --lines=LINES Number of lines to print",
" -c --bytes=BYTES Number of bytes to print",
};
Options opt = parseOptions(session, usage, argv);
if (opt.isSet("lines") && opt.isSet("bytes")) {
throw new IllegalArgumentException("usage: tail [-f] [-q] [-c # | -n #] [file ...]");
}
int lines;
int bytes;
if (opt.isSet("lines")) {
lines = opt.getNumber("lines");
bytes = Integer.MAX_VALUE;
} else if (opt.isSet("bytes")) {
lines = Integer.MAX_VALUE;
bytes = opt.getNumber("bytes");
} else {
lines = 10;
bytes = Integer.MAX_VALUE;
}
boolean follow = opt.isSet("follow") || opt.isSet("FOLLOW");
AtomicReference lastPrinted = new AtomicReference<>();
WatchService watchService = follow ? session.currentDir().getFileSystem().newWatchService() : null;
Set watched = new HashSet<>();
class Input implements Closeable {
String name;
Path path;
Reader reader;
StringBuilder buffer;
long ino;
long size;
public Input(String name) {
this.name = name;
this.buffer = new StringBuilder();
}
public void open() {
if (reader == null) {
try {
InputStream is;
if ("-".equals(name)) {
is = new StdInSource(process).read();
} else {
path = session.currentDir().resolve(name);
is = Files.newInputStream(path);
if (opt.isSet("FOLLOW")) {
try {
ino = (Long) Files.getAttribute(path, "unix:ino");
} catch (Exception e) {
// Ignore
}
}
size = Files.size(path);
}
reader = new InputStreamReader(is);
} catch (IOException e) {
// Ignore
}
}
}
@Override
public void close() throws IOException {
if (reader != null) {
try {
reader.close();
} finally {
reader = null;
}
}
}
public boolean tail() throws IOException {
open();
if (reader != null) {
if (buffer != null) {
char[] buf = new char[1024];
int nb;
while ((nb = reader.read(buf)) > 0) {
buffer.append(buf, 0, nb);
if (bytes > 0 && buffer.length() > bytes) {
buffer.delete(0, buffer.length() - bytes);
} else {
int l = 0;
int i = -1;
while ((i = buffer.indexOf("\n", i + 1)) >= 0) {
l++;
}
if (l > lines) {
i = -1;
l = l - lines;
while (--l >= 0) {
i = buffer.indexOf("\n", i + 1);
}
buffer.delete(0, i + 1);
}
}
}
String toPrint = buffer.toString();
print(toPrint);
buffer = null;
if (follow && path != null) {
Path parent = path.getParent();
if (!watched.contains(parent)) {
parent.register(watchService,
StandardWatchEventKinds.ENTRY_CREATE,
StandardWatchEventKinds.ENTRY_DELETE,
StandardWatchEventKinds.ENTRY_MODIFY);
watched.add(parent);
}
}
return follow;
}
else if (follow && path != null) {
while (true) {
long newSize = Files.size(path);
if (size != newSize) {
char[] buf = new char[1024];
int nb;
while ((nb = reader.read(buf)) > 0) {
print(new String(buf, 0, nb));
}
size = newSize;
}
if (opt.isSet("FOLLOW")) {
long newIno = 0;
try {
newIno = (Long) Files.getAttribute(path, "unix:ino");
} catch (Exception e) {
// Ignore
}
if (ino != newIno) {
close();
open();
ino = newIno;
size = -1;
continue;
}
}
break;
}
return true;
} else {
return false;
}
} else {
Path parent = path.getParent();
if (!watched.contains(parent)) {
parent.register(watchService,
StandardWatchEventKinds.ENTRY_CREATE,
StandardWatchEventKinds.ENTRY_DELETE,
StandardWatchEventKinds.ENTRY_MODIFY);
watched.add(parent);
}
return true;
}
}
private void print(String toPrint) {
if (lastPrinted.get() != this && opt.args().size() > 1 && !opt.isSet("quiet")) {
process.out().println();
process.out().println("==> " + name + " <==");
}
process.out().print(toPrint);
lastPrinted.set(this);
}
}
if (opt.args().isEmpty()) {
opt.args().add("-");
}
List args = opt.args();
if (args.isEmpty()) {
throw new IllegalArgumentException("usage: watch COMMAND");
}
ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
final Terminal terminal = Shell.getTerminal(session);
final CommandProcessor processor = Shell.getProcessor(session);
try {
int interval = 1;
if (opt.isSet("interval")) {
interval = opt.getNumber("interval");
if (interval < 1) {
interval = 1;
}
}
final String cmd = String.join(" ", args);
Runnable task = () -> {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream os = new PrintStream(baos);
InputStream is = new ByteArrayInputStream(new byte[0]);
if (opt.isSet("append") || !terminal.puts(Capability.clear_screen)) {
terminal.writer().println();
}
try {
CommandSession ns = processor.createSession(is, os, os);
Set vars = Shell.getCommands(session);
for (String n : vars) {
ns.put(n, session.get(n));
}
ns.execute(cmd);
} catch (Throwable t) {
t.printStackTrace(os);
}
os.flush();
terminal.writer().print(baos.toString());
terminal.writer().flush();
};
executorService.scheduleAtFixedRate(task, 0, interval, TimeUnit.SECONDS);
Attributes attr = terminal.enterRawMode();
terminal.reader().read();
terminal.setAttributes(attr);
} finally {
executorService.shutdownNow();
}
}
protected void less(CommandSession session, Process process, String[] argv) throws Exception {
Options opt = parseOptions(session, Less.usage(), argv);
List sources = new ArrayList<>();
if (opt.args().isEmpty()) {
opt.args().add("-");
}
for (String arg : opt.args()) {
if ("-".equals(arg)) {
sources.add(new StdInSource(process));
} else if (arg.contains("*") || arg.contains("?")) {
PathMatcher pathMatcher = FileSystems.getDefault().getPathMatcher("glob:"+arg);
Files.find(session.currentDir(), Integer.MAX_VALUE, (path, f) -> pathMatcher.matches(path))
.forEach(p -> sources.add(doUrlSource(session.currentDir(), p)));
} else {
sources.add(new PathSource(session.currentDir().resolve(arg), arg));
}
}
if (!process.isTty(1)) {
for (Source source : sources) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(source.read()))) {
cat(process, reader, opt.isSet("LINE-NUMBERS"));
}
}
return;
}
Less less = new Less(Shell.getTerminal(session), session.currentDir(), opt);
less.run(sources);
}
private static Source doUrlSource(Path currentDir, Path file) {
Source out = null;
try {
out = new URLSource(currentDir.resolve(file).toUri().toURL(), file.toString());
} catch (MalformedURLException exp) {
throw new IllegalArgumentException(exp.getMessage());
}
return out;
}
protected void sort(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"sort - writes sorted standard input to standard output.",
"Usage: sort [OPTIONS] [FILES]",
" -? --help show help",
" -f --ignore-case fold lower case to upper case characters",
" -r --reverse reverse the result of comparisons",
" -u --unique output only the first of an equal run",
" -t --field-separator=SEP use SEP instead of non-blank to blank transition",
" -b --ignore-leading-blanks ignore leading blancks",
" --numeric-sort compare according to string numerical value",
" -k --key=KEY fields to use for sorting separated by whitespaces"};
Options opt = parseOptions(session, usage, argv);
List args = opt.args();
List lines = new ArrayList<>();
if (!args.isEmpty()) {
for (String filename : args) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(
session.currentDir().toUri().resolve(filename).toURL().openStream()))) {
read(reader, lines);
}
}
} else {
BufferedReader r = new BufferedReader(new InputStreamReader(process.in()));
read(r, lines);
}
String separator = opt.get("field-separator");
boolean caseInsensitive = opt.isSet("ignore-case");
boolean reverse = opt.isSet("reverse");
boolean ignoreBlanks = opt.isSet("ignore-leading-blanks");
boolean numeric = opt.isSet("numeric-sort");
boolean unique = opt.isSet("unique");
List sortFields = opt.getList("key");
char sep = (separator == null || separator.length() == 0) ? '\0' : separator.charAt(0);
lines.sort(new SortComparator(caseInsensitive, reverse, ignoreBlanks, numeric, sep, sortFields));
String last = null;
for (String s : lines) {
if (!unique || last == null || !s.equals(last)) {
process.out().println(s);
}
last = s;
}
}
protected void pwd(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"pwd - get current directory",
"Usage: pwd [OPTIONS]",
" -? --help show help"
};
Options opt = parseOptions(session, usage, argv);
if (!opt.args().isEmpty()) {
throw new IllegalArgumentException("usage: pwd");
}
process.out().println(session.currentDir());
}
protected void cd(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"cd - get current directory",
"Usage: cd [OPTIONS] DIRECTORY",
" -? --help show help"
};
Options opt = parseOptions(session, usage, argv);
if (opt.args().size() != 1) {
throw new IllegalArgumentException("usage: cd DIRECTORY");
}
Path cwd = session.currentDir();
cwd = cwd.resolve(opt.args().get(0)).toAbsolutePath().normalize();
if (!Files.exists(cwd)) {
throw new IOException("no such file or directory: " + opt.args().get(0));
} else if (!Files.isDirectory(cwd)) {
throw new IOException("not a directory: " + opt.args().get(0));
}
session.currentDir(cwd);
}
protected void ls(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"ls - list files",
"Usage: ls [OPTIONS] [PATTERNS...]",
" -? --help show help",
" -1 list one entry per line",
" -C multi-column output",
" --color=WHEN colorize the output, may be `always', `never' or `auto'",
" -a list entries starting with .",
" -F append file type indicators",
" -m comma separated",
" -l long listing",
" -S sort by size",
" -f output is not sorted",
" -r reverse sort order",
" -t sort by modification time",
" -x sort horizontally",
" -L list referenced file for links",
" -h print sizes in human readable form"
};
Options opt = parseOptions(session, usage, argv);
String color = opt.isSet("color") ? opt.get("color") : "auto";
boolean colored;
switch (color) {
case "always":
case "yes":
case "force":
colored = true;
break;
case "never":
case "no":
case "none":
colored = false;
break;
case "auto":
case "tty":
case "if-tty":
colored = process.isTty(1);
break;
default:
throw new IllegalArgumentException("invalid argument ‘" + color + "’ for ‘--color’");
}
Map colors = colored ? getLsColorMap(session) : Collections.emptyMap();
class PathEntry implements Comparable {
final Path abs;
final Path path;
final Map attributes;
public PathEntry(Path abs, Path root) {
this.abs = abs;
this.path = abs.startsWith(root) ? root.relativize(abs) : abs;
this.attributes = readAttributes(abs);
}
@Override
public int compareTo(PathEntry o) {
int c = doCompare(o);
return opt.isSet("r") ? -c : c;
}
private int doCompare(PathEntry o) {
if (opt.isSet("f")) {
return -1;
}
if (opt.isSet("S")) {
long s0 = attributes.get("size") != null ? ((Number) attributes.get("size")).longValue() : 0L;
long s1 = o.attributes.get("size") != null ? ((Number) o.attributes.get("size")).longValue() : 0L;
return s0 > s1 ? -1 : s0 < s1 ? 1 : path.toString().compareTo(o.path.toString());
}
if (opt.isSet("t")) {
long t0 = attributes.get("lastModifiedTime") != null ? ((FileTime) attributes.get("lastModifiedTime")).toMillis() : 0L;
long t1 = o.attributes.get("lastModifiedTime") != null ? ((FileTime) o.attributes.get("lastModifiedTime")).toMillis() : 0L;
return t0 > t1 ? -1 : t0 < t1 ? 1 : path.toString().compareTo(o.path.toString());
}
return path.toString().compareTo(o.path.toString());
}
boolean isNotDirectory() {
return is("isRegularFile") || is("isSymbolicLink") || is("isOther");
}
boolean isDirectory() {
return is("isDirectory");
}
private boolean is(String attr) {
Object d = attributes.get(attr);
return d instanceof Boolean && (Boolean) d;
}
String display() {
String type;
String suffix;
String link = "";
if (is("isSymbolicLink")) {
type = "sl";
suffix = "@";
try {
Path l = Files.readSymbolicLink(abs);
link = " -> " + l.toString();
} catch (IOException e) {
// ignore
}
} else if (is("isDirectory")) {
type = "dr";
suffix = "/";
} else if (is("isExecutable")) {
type = "ex";
suffix = "*";
} else if (is("isOther")) {
type = "ot";
suffix = "";
} else {
type = "";
suffix = "";
}
boolean addSuffix = opt.isSet("F");
return applyStyle(path.toString(), colors, type)
+ (addSuffix ? suffix : "") + link;
}
String longDisplay() {
String username;
if (attributes.containsKey("owner")) {
username = Objects.toString(attributes.get("owner"), null);
} else {
username = "owner";
}
if (username.length() > 8) {
username = username.substring(0, 8);
} else {
for (int i = username.length(); i < 8; i++) {
username = username + " ";
}
}
String group;
if (attributes.containsKey("group")) {
group = Objects.toString(attributes.get("group"), null);
} else {
group = "group";
}
if (group.length() > 8) {
group = group.substring(0, 8);
} else {
for (int i = group.length(); i < 8; i++) {
group = group + " ";
}
}
Number length = (Number) attributes.get("size");
if (length == null) {
length = 0L;
}
String lengthString;
if (opt.isSet("h")) {
double l = length.longValue();
String unit = "B";
if (l >= 1000) {
l /= 1024;
unit = "K";
if (l >= 1000) {
l /= 1024;
unit = "M";
if (l >= 1000) {
l /= 1024;
unit = "T";
}
}
}
if (l < 10 && length.longValue() > 1000) {
lengthString = String.format("%.1f", l) + unit;
} else {
lengthString = String.format("%3.0f", l) + unit;
}
} else {
lengthString = String.format("%1$8s", length);
}
@SuppressWarnings("unchecked")
Set perms = (Set) attributes.get("permissions");
if (perms == null) {
perms = EnumSet.noneOf(PosixFilePermission.class);
}
// TODO: all fields should be padded to align
return (is("isDirectory") ? "d" : (is("isSymbolicLink") ? "l" : (is("isOther") ? "o" : "-")))
+ PosixFilePermissions.toString(perms) + " "
+ String.format("%3s", (attributes.containsKey("nlink") ? attributes.get("nlink").toString() : "1"))
+ " " + username + " " + group + " " + lengthString + " "
+ toString((FileTime) attributes.get("lastModifiedTime"))
+ " " + display();
}
protected String toString(FileTime time) {
long millis = (time != null) ? time.toMillis() : -1L;
if (millis < 0L) {
return "------------";
}
ZonedDateTime dt = Instant.ofEpochMilli(millis).atZone(ZoneId.systemDefault());
// Less than six months
if (System.currentTimeMillis() - millis < 183L * 24L * 60L * 60L * 1000L) {
return DateTimeFormatter.ofPattern("MMM ppd HH:mm").format(dt);
}
// Older than six months
else {
return DateTimeFormatter.ofPattern("MMM ppd yyyy").format(dt);
}
}
protected Map readAttributes(Path path) {
Map attrs = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
for (String view : path.getFileSystem().supportedFileAttributeViews()) {
try {
Map ta = Files.readAttributes(path, view + ":*",
getLinkOptions(opt.isSet("L")));
ta.forEach(attrs::putIfAbsent);
} catch (IOException e) {
// Ignore
}
}
attrs.computeIfAbsent("isExecutable", s -> Files.isExecutable(path));
attrs.computeIfAbsent("permissions", s -> getPermissionsFromFile(path.toFile()));
return attrs;
}
}
Path currentDir = session.currentDir();
// Listing
List expanded = new ArrayList<>();
if (opt.args().isEmpty()) {
expanded.add(currentDir);
} else {
opt.args().forEach(s -> expanded.add(currentDir.resolve(s)));
}
boolean listAll = opt.isSet("a");
Predicate filter = p -> listAll || p.getFileName().toString().equals(".")
|| p.getFileName().toString().equals("..") || !p.getFileName().toString().startsWith(".");
List all = expanded.stream()
.filter(filter)
.map(p -> new PathEntry(p, currentDir))
.sorted()
.collect(Collectors.toList());
// Print files first
List files = all.stream()
.filter(PathEntry::isNotDirectory)
.collect(Collectors.toList());
PrintStream out = process.out();
Consumer> display = s -> {
boolean optLine = opt.isSet("1");
boolean optComma = opt.isSet("m");
boolean optLong = opt.isSet("l");
boolean optCol = opt.isSet("C");
if (!optLine && !optComma && !optLong && !optCol) {
if (process.isTty(1)) {
optCol = true;
}
else {
optLine = true;
}
}
// One entry per line
if (optLine) {
s.map(PathEntry::display).forEach(out::println);
}
// Comma separated list
else if (optComma) {
out.println(s.map(PathEntry::display).collect(Collectors.joining(", ")));
}
// Long listing
else if (optLong) {
s.map(PathEntry::longDisplay).forEach(out::println);
}
// Column listing
else if (optCol) {
toColumn(session, process, out, s.map(PathEntry::display), opt.isSet("x"));
}
};
boolean space = false;
if (!files.isEmpty()) {
display.accept(files.stream());
space = true;
}
// Print directories
List directories = all.stream()
.filter(PathEntry::isDirectory)
.collect(Collectors.toList());
for (PathEntry entry : directories) {
if (space) {
out.println();
}
space = true;
Path path = currentDir.resolve(entry.path);
if (expanded.size() > 1) {
out.println(currentDir.relativize(path).toString() + ":");
}
display.accept(Stream.concat(Stream.of(".", "..").map(path::resolve), Files.list(path))
.filter(filter)
.map(p -> new PathEntry(p, path))
.sorted()
);
}
}
private void toColumn(CommandSession session, Process process, PrintStream out, Stream ansi, boolean horizontal) {
Terminal terminal = Shell.getTerminal(session);
int width = process.isTty(1) ? terminal.getWidth() : 80;
List strings = ansi.map(AttributedString::fromAnsi).collect(Collectors.toList());
if (!strings.isEmpty()) {
int max = strings.stream().mapToInt(AttributedString::columnLength).max().getAsInt();
int c = Math.max(1, width / max);
while (c > 1 && c * max + (c - 1) >= width) {
c--;
}
int columns = c;
int lines = (strings.size() + columns - 1) / columns;
IntBinaryOperator index;
if (horizontal) {
index = (i, j) -> i * columns + j;
} else {
index = (i, j) -> j * lines + i;
}
AttributedStringBuilder sb = new AttributedStringBuilder();
for (int i = 0; i < lines; i++) {
for (int j = 0; j < columns; j++) {
int idx = index.applyAsInt(i, j);
if (idx < strings.size()) {
AttributedString str = strings.get(idx);
boolean hasRightItem = j < columns - 1 && index.applyAsInt(i, j + 1) < strings.size();
sb.append(str);
if (hasRightItem) {
for (int k = 0; k <= max - str.length(); k++) {
sb.append(' ');
}
}
}
}
sb.append('\n');
}
out.print(sb.toAnsi(terminal));
}
}
protected void cat(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"cat - concatenate and print FILES",
"Usage: cat [OPTIONS] [FILES]",
" -? --help show help",
" -n number the output lines, starting at 1"
};
Options opt = parseOptions(session, usage, argv);
List args = opt.args();
if (args.isEmpty()) {
args = Collections.singletonList("-");
}
Path cwd = session.currentDir();
for (String arg : args) {
InputStream is;
if ("-".equals(arg)) {
is = process.in();
} else {
is = cwd.toUri().resolve(arg).toURL().openStream();
}
cat(process, new BufferedReader(new InputStreamReader(is)), opt.isSet("n"));
}
}
protected void echo(CommandSession session, Process process, Object[] argv) throws Exception {
final String[] usage = {
"echo - echoes or prints ARGUMENT to standard output",
"Usage: echo [OPTIONS] [ARGUMENTS]",
" -? --help show help",
" -n no trailing new line"
};
Options opt = parseOptions(session, usage, argv);
List args = opt.args();
StringBuilder buf = new StringBuilder();
if (args != null) {
for (String arg : args) {
if (buf.length() > 0)
buf.append(' ');
for (int i = 0; i < arg.length(); i++) {
int c = arg.charAt(i);
int ch;
if (c == '\\') {
c = i < arg.length() - 1 ? arg.charAt(++i) : '\\';
switch (c) {
case 'a':
buf.append('\u0007');
break;
case 'n':
buf.append('\n');
break;
case 't':
buf.append('\t');
break;
case 'r':
buf.append('\r');
break;
case '\\':
buf.append('\\');
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
ch = 0;
for (int j = 0; j < 3; j++) {
c = i < arg.length() - 1 ? arg.charAt(++i) : -1;
if (c >= 0) {
ch = ch * 8 + (c - '0');
}
}
buf.append((char) ch);
break;
case 'u':
ch = 0;
for (int j = 0; j < 4; j++) {
c = i < arg.length() - 1 ? arg.charAt(++i) : -1;
if (c >= 0) {
if (c >= 'A' && c <= 'Z') {
ch = ch * 16 + (c - 'A' + 10);
} else if (c >= 'a' && c <= 'z') {
ch = ch * 16 + (c - 'a' + 10);
} else if (c >= '0' && c <= '9') {
ch = ch * 16 + (c - '0');
} else {
break;
}
}
}
buf.append((char) ch);
break;
default:
buf.append((char) c);
break;
}
} else {
buf.append((char) c);
}
}
}
}
if (opt.isSet("n")) {
process.out().print(buf);
} else {
process.out().println(buf);
}
}
protected void grep(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"grep - search for PATTERN in each FILE or standard input.",
"Usage: grep [OPTIONS] PATTERN [FILES]",
" -? --help Show help",
" -i --ignore-case Ignore case distinctions",
" -n --line-number Prefix each line with line number within its input file",
" -q --quiet, --silent Suppress all normal output",
" -v --invert-match Select non-matching lines",
" -w --word-regexp Select only whole words",
" -x --line-regexp Select only whole lines",
" -c --count Only print a count of matching lines per file",
" --color=WHEN Use markers to distinguish the matching string, may be `always', `never' or `auto'",
" -B --before-context=NUM Print NUM lines of leading context before matching lines",
" -A --after-context=NUM Print NUM lines of trailing context after matching lines",
" -C --context=NUM Print NUM lines of output context",
" --pad-lines Pad line numbers"
};
Options opt = parseOptions(session, usage, argv);
List args = opt.args();
if (args.isEmpty()) {
throw new IllegalArgumentException("no pattern supplied");
}
String regex = args.remove(0);
String regexp = regex;
if (opt.isSet("word-regexp")) {
regexp = "\\b" + regexp + "\\b";
}
if (opt.isSet("line-regexp")) {
regexp = "^" + regexp + "$";
} else {
regexp = ".*" + regexp + ".*";
}
Pattern p;
Pattern p2;
if (opt.isSet("ignore-case")) {
p = Pattern.compile(regexp, Pattern.CASE_INSENSITIVE);
p2 = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
} else {
p = Pattern.compile(regexp);
p2 = Pattern.compile(regex);
}
int after = opt.isSet("after-context") ? opt.getNumber("after-context") : -1;
int before = opt.isSet("before-context") ? opt.getNumber("before-context") : -1;
int context = opt.isSet("context") ? opt.getNumber("context") : 0;
String lineFmt = opt.isSet("pad-lines") ? "%6d" : "%d";
if (after < 0) {
after = context;
}
if (before < 0) {
before = context;
}
List lines = new ArrayList<>();
boolean invertMatch = opt.isSet("invert-match");
boolean lineNumber = opt.isSet("line-number");
boolean count = opt.isSet("count");
String color = opt.isSet("color") ? opt.get("color") : "auto";
boolean colored;
switch (color) {
case "always":
case "yes":
case "force":
colored = true;
break;
case "never":
case "no":
case "none":
colored = false;
break;
case "auto":
case "tty":
case "if-tty":
colored = process.isTty(1);
break;
default:
throw new IllegalArgumentException("invalid argument ‘" + color + "’ for ‘--color’");
}
Map colors = colored ? getColorMap(session, "GREP", DEFAULT_GREP_COLORS) : Collections.emptyMap();
List sources = new ArrayList<>();
if (opt.args().isEmpty()) {
opt.args().add("-");
}
for (String arg : opt.args()) {
if ("-".equals(arg)) {
sources.add(new StdInSource(process));
} else {
sources.add(new PathSource(session.currentDir().resolve(arg), arg));
}
}
boolean match = false;
for (Source source : sources) {
boolean firstPrint = true;
int nb = 0;
int lineno = 1;
String line;
int lineMatch = 0;
try (BufferedReader r = new BufferedReader(new InputStreamReader(source.read()))) {
while ((line = r.readLine()) != null) {
if (line.length() == 1 && line.charAt(0) == '\n') {
break;
}
boolean matches = p.matcher(line).matches();
AttributedStringBuilder sbl = new AttributedStringBuilder();
if (!count) {
if (sources.size() > 1) {
if (colored) {
applyStyle(sbl, colors, "fn");
}
sbl.append(source.getName());
if (colored) {
applyStyle(sbl, colors, "se");
}
sbl.append(":");
}
if (lineNumber) {
if (colored) {
applyStyle(sbl, colors, "ln");
}
sbl.append(String.format(lineFmt, lineno));
if (colored) {
applyStyle(sbl, colors, "se");
}
sbl.append((matches ^ invertMatch) ? ":" : "-");
}
String style = matches ^ invertMatch ^ (invertMatch && colors.containsKey("rv"))
? "sl" : "cx";
if (colored) {
applyStyle(sbl, colors, style);
}
AttributedString aLine = AttributedString.fromAnsi(line);
Matcher matcher2 = p2.matcher(aLine.toString());
int cur = 0;
while (matcher2.find()) {
int index = matcher2.start(0);
AttributedString prefix = aLine.subSequence(cur, index);
sbl.append(prefix);
cur = matcher2.end();
if (colored) {
applyStyle(sbl, colors, invertMatch ? "mc" : "ms", "mt");
}
sbl.append(aLine.subSequence(index, cur));
if (colored) {
applyStyle(sbl, colors, style);
}
nb++;
}
sbl.append(aLine.subSequence(cur, aLine.length()));
}
if (matches ^ invertMatch) {
lines.add(sbl.toAnsi(Shell.getTerminal(session)));
lineMatch = lines.size();
} else {
if (lineMatch != 0 & lineMatch + after + before <= lines.size()) {
if (!count) {
if (!firstPrint && before + after > 0) {
AttributedStringBuilder sbl2 = new AttributedStringBuilder();
if (colored) {
applyStyle(sbl2, colors, "se");
}
sbl2.append("--");
process.out().println(sbl2.toAnsi(Shell.getTerminal(session)));
} else {
firstPrint = false;
}
for (int i = 0; i < lineMatch + after; i++) {
process.out().println(lines.get(i));
}
}
while (lines.size() > before) {
lines.remove(0);
}
lineMatch = 0;
}
lines.add(sbl.toAnsi(Shell.getTerminal(session)));
while (lineMatch == 0 && lines.size() > before) {
lines.remove(0);
}
}
lineno++;
}
if (!count && lineMatch > 0) {
if (!firstPrint && before + after > 0) {
AttributedStringBuilder sbl2 = new AttributedStringBuilder();
if (colored) {
applyStyle(sbl2, colors, "se");
}
sbl2.append("--");
process.out().println(sbl2.toAnsi(Shell.getTerminal(session)));
} else {
firstPrint = false;
}
for (int i = 0; i < lineMatch + after && i < lines.size(); i++) {
process.out().println(lines.get(i));
}
}
if (count) {
process.out().println(nb);
}
match |= nb > 0;
}
}
Process.Utils.current().error(match ? 0 : 1);
}
protected void sleep(CommandSession session, Process process, String[] argv) throws Exception {
final String[] usage = {
"sleep - suspend execution for an interval of time",
"Usage: sleep seconds",
" -? --help show help"};
Options opt = parseOptions(session, usage, argv);
List args = opt.args();
if (args.size() != 1) {
throw new IllegalArgumentException("usage: sleep seconds");
} else {
int s = Integer.parseInt(args.get(0));
Thread.sleep(s * 1000);
}
}
protected static void read(BufferedReader r, List lines) throws IOException {
for (String s = r.readLine(); s != null; s = r.readLine()) {
lines.add(s);
}
}
private static void cat(Process process, final BufferedReader reader, boolean displayLineNumbers) throws IOException {
String line;
int lineno = 1;
try {
while ((line = reader.readLine()) != null) {
if (displayLineNumbers) {
process.out().print(String.format("%6d ", lineno++));
}
process.out().println(line);
}
} finally {
reader.close();
}
}
public static class SortComparator implements Comparator {
private static Pattern fpPattern;
static {
final String Digits = "(\\p{Digit}+)";
final String HexDigits = "(\\p{XDigit}+)";
final String Exp = "[eE][+-]?" + Digits;
final String fpRegex = "([\\x00-\\x20]*[+-]?(NaN|Infinity|(((" + Digits + "(\\.)?(" + Digits + "?)(" + Exp + ")?)|(\\.(" + Digits + ")(" + Exp + ")?)|(((0[xX]" + HexDigits + "(\\.)?)|(0[xX]" + HexDigits + "?(\\.)" + HexDigits + "))[pP][+-]?" + Digits + "))" + "[fFdD]?))[\\x00-\\x20]*)(.*)";
fpPattern = Pattern.compile(fpRegex);
}
private boolean caseInsensitive;
private boolean reverse;
private boolean ignoreBlanks;
private boolean numeric;
private char separator;
private List sortKeys;
public SortComparator(boolean caseInsensitive,
boolean reverse,
boolean ignoreBlanks,
boolean numeric,
char separator,
List sortFields) {
this.caseInsensitive = caseInsensitive;
this.reverse = reverse;
this.separator = separator;
this.ignoreBlanks = ignoreBlanks;
this.numeric = numeric;
if (sortFields == null || sortFields.size() == 0) {
sortFields = new ArrayList<>();
sortFields.add("1");
}
sortKeys = sortFields.stream().map(Key::new).collect(Collectors.toList());
}
public int compare(String o1, String o2) {
int res = 0;
List fi1 = getFieldIndexes(o1);
List fi2 = getFieldIndexes(o2);
for (Key key : sortKeys) {
int[] k1 = getSortKey(o1, fi1, key);
int[] k2 = getSortKey(o2, fi2, key);
if (key.numeric) {
Double d1 = getDouble(o1, k1[0], k1[1]);
Double d2 = getDouble(o2, k2[0], k2[1]);
res = d1.compareTo(d2);
} else {
res = compareRegion(o1, k1[0], k1[1], o2, k2[0], k2[1], key.caseInsensitive);
}
if (res != 0) {
if (key.reverse) {
res = -res;
}
break;
}
}
return res;
}
protected Double getDouble(String s, int start, int end) {
Matcher m = fpPattern.matcher(s.substring(start, end));
m.find();
return new Double(s.substring(0, m.end(1)));
}
protected int compareRegion(String s1, int start1, int end1, String s2, int start2, int end2, boolean caseInsensitive) {
for (int i1 = start1, i2 = start2; i1 < end1 && i2 < end2; i1++, i2++) {
char c1 = s1.charAt(i1);
char c2 = s2.charAt(i2);
if (c1 != c2) {
if (caseInsensitive) {
c1 = Character.toUpperCase(c1);
c2 = Character.toUpperCase(c2);
if (c1 != c2) {
c1 = Character.toLowerCase(c1);
c2 = Character.toLowerCase(c2);
if (c1 != c2) {
return c1 - c2;
}
}
} else {
return c1 - c2;
}
}
}
return end1 - end2;
}
protected int[] getSortKey(String str, List fields, Key key) {
int start;
int end;
if (key.startField * 2 <= fields.size()) {
start = fields.get((key.startField - 1) * 2);
if (key.ignoreBlanksStart) {
while (start < fields.get((key.startField - 1) * 2 + 1) && Character.isWhitespace(str.charAt(start))) {
start++;
}
}
if (key.startChar > 0) {
start = Math.min(start + key.startChar - 1, fields.get((key.startField - 1) * 2 + 1));
}
} else {
start = 0;
}
if (key.endField > 0 && key.endField * 2 <= fields.size()) {
end = fields.get((key.endField - 1) * 2);
if (key.ignoreBlanksEnd) {
while (end < fields.get((key.endField - 1) * 2 + 1) && Character.isWhitespace(str.charAt(end))) {
end++;
}
}
if (key.endChar > 0) {
end = Math.min(end + key.endChar - 1, fields.get((key.endField - 1) * 2 + 1));
}
} else {
end = str.length();
}
return new int[]{start, end};
}
protected List getFieldIndexes(String o) {
List fields = new ArrayList<>();
if (o.length() > 0) {
if (separator == '\0') {
fields.add(0);
for (int idx = 1; idx < o.length(); idx++) {
if (Character.isWhitespace(o.charAt(idx)) && !Character.isWhitespace(o.charAt(idx - 1))) {
fields.add(idx - 1);
fields.add(idx);
}
}
fields.add(o.length() - 1);
} else {
int last = -1;
for (int idx = o.indexOf(separator); idx >= 0; idx = o.indexOf(separator, idx + 1)) {
if (last >= 0) {
fields.add(last);
fields.add(idx - 1);
} else if (idx > 0) {
fields.add(0);
fields.add(idx - 1);
}
last = idx + 1;
}
if (last < o.length()) {
fields.add(last < 0 ? 0 : last);
fields.add(o.length() - 1);
}
}
}
return fields;
}
public class Key {
int startField;
int startChar;
int endField;
int endChar;
boolean ignoreBlanksStart;
boolean ignoreBlanksEnd;
boolean caseInsensitive;
boolean reverse;
boolean numeric;
public Key(String str) {
boolean modifiers = false;
boolean startPart = true;
boolean inField = true;
boolean inChar = false;
for (char c : str.toCharArray()) {
switch (c) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (!inField && !inChar) {
throw new IllegalArgumentException("Bad field syntax: " + str);
}
if (startPart) {
if (inChar) {
startChar = startChar * 10 + (c - '0');
} else {
startField = startField * 10 + (c - '0');
}
} else {
if (inChar) {
endChar = endChar * 10 + (c - '0');
} else {
endField = endField * 10 + (c - '0');
}
}
break;
case '.':
if (!inField) {
throw new IllegalArgumentException("Bad field syntax: " + str);
}
inField = false;
inChar = true;
break;
case 'n':
inField = false;
inChar = false;
modifiers = true;
numeric = true;
break;
case 'f':
inField = false;
inChar = false;
modifiers = true;
caseInsensitive = true;
break;
case 'r':
inField = false;
inChar = false;
modifiers = true;
reverse = true;
break;
case 'b':
inField = false;
inChar = false;
modifiers = true;
if (startPart) {
ignoreBlanksStart = true;
} else {
ignoreBlanksEnd = true;
}
break;
case ',':
inField = true;
inChar = false;
startPart = false;
break;
default:
throw new IllegalArgumentException("Bad field syntax: " + str);
}
}
if (!modifiers) {
ignoreBlanksStart = ignoreBlanksEnd = SortComparator.this.ignoreBlanks;
reverse = SortComparator.this.reverse;
caseInsensitive = SortComparator.this.caseInsensitive;
numeric = SortComparator.this.numeric;
}
if (startField < 1) {
throw new IllegalArgumentException("Bad field syntax: " + str);
}
}
}
}
private static LinkOption[] getLinkOptions(boolean followLinks) {
if (followLinks) {
return EMPTY_LINK_OPTIONS;
} else { // return a clone that modifications to the array will not affect others
return NO_FOLLOW_OPTIONS.clone();
}
}
/**
* @param fileName The file name to be evaluated - ignored if {@code null}/empty
* @return {@code true} if the file ends in one of the {@link #WINDOWS_EXECUTABLE_EXTENSIONS}
*/
private static boolean isWindowsExecutable(String fileName) {
if ((fileName == null) || (fileName.length() <= 0)) {
return false;
}
for (String suffix : WINDOWS_EXECUTABLE_EXTENSIONS) {
if (fileName.endsWith(suffix)) {
return true;
}
}
return false;
}
/**
* @param f The {@link File} to be checked
* @return A {@link Set} of {@link PosixFilePermission}s based on whether
* the file is readable/writable/executable. If so, then all the
* relevant permissions are set (i.e., owner, group and others)
*/
private static Set getPermissionsFromFile(File f) {
Set perms = EnumSet.noneOf(PosixFilePermission.class);
if (f.canRead()) {
perms.add(PosixFilePermission.OWNER_READ);
perms.add(PosixFilePermission.GROUP_READ);
perms.add(PosixFilePermission.OTHERS_READ);
}
if (f.canWrite()) {
perms.add(PosixFilePermission.OWNER_WRITE);
perms.add(PosixFilePermission.GROUP_WRITE);
perms.add(PosixFilePermission.OTHERS_WRITE);
}
if (f.canExecute() || (OSUtils.IS_WINDOWS && isWindowsExecutable(f.getName()))) {
perms.add(PosixFilePermission.OWNER_EXECUTE);
perms.add(PosixFilePermission.GROUP_EXECUTE);
perms.add(PosixFilePermission.OTHERS_EXECUTE);
}
return perms;
}
public static Map getLsColorMap(CommandSession session) {
return getColorMap(session, "LS", DEFAULT_LS_COLORS);
}
public static Map getColorMap(CommandSession session, String name, String def) {
Object obj = session.get(name + "_COLORS");
String str = obj != null ? obj.toString() : null;
if (str == null) {
str = def;
}
String sep = str.matches("[a-z]{2}=[0-9]*(;[0-9]+)*(:[a-z]{2}=[0-9]*(;[0-9]+)*)*") ? ":" : " ";
return Arrays.stream(str.split(sep))
.collect(Collectors.toMap(s -> s.substring(0, s.indexOf('=')),
s -> s.substring(s.indexOf('=') + 1)));
}
static String applyStyle(String text, Map colors, String... types) {
String t = null;
for (String type : types) {
if (colors.get(type) != null) {
t = type;
break;
}
}
return new AttributedString(text, new StyleResolver(colors::get).resolve("." + t))
.toAnsi();
}
static void applyStyle(AttributedStringBuilder sb, Map colors, String... types) {
String t = null;
for (String type : types) {
if (colors.get(type) != null) {
t = type;
break;
}
}
sb.style(new StyleResolver(colors::get).resolve("." + t));
}
private static class StdInSource implements Source {
private final Process process;
StdInSource(Process process) {
this.process = process;
}
@Override
public String getName() {
return null;
}
@Override
public InputStream read() {
return process.in();
}
@Override
public Long lines() {
return null;
}
}
}
