/**
* argparser – command line argument parser library
*
* Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.*;
import java.io.*;
/**
* Simple argument parser
*
* @author Mattias Andrée, <a href="mailto:maandree@member.fsf.org">maandree@member.fsf.org</a>
*/
public class ArgParser
{
/**
* <p>Constructor</p>
* <p>
* The short description is printed on same line as the program name
* </p>
*
* @param description Short, single-line, description of the program
* @param usage Formated, multi-line, usage text, may be {@code null}
*/
public ArgParser(final String description, final String usage)
{ this(description, usage, null, null, false);
}
/**
* <p>Constructor</p>
* <p>
* The short description is printed on same line as the program name
* </p>
*
* @param description Short, single-line, description of the program
* @param usage Formated, multi-line, usage text, may be {@code null}
* @param useStderr Whether to use stderr instead of stdout
*/
public ArgParser(final String description, final String usage, final boolean useStderr)
{ this(description, usage, null, null, useStderr);
}
/**
* <p>Constructor</p>
* <p>
* The short description is printed on same line as the program name
* </p>
*
* @param description Short, single-line, description of the program
* @param usage Formated, multi-line, usage text, may be {@code null}
* @param longDescription Long, multi-line, description of the program, may be {@code null}
*/
public ArgParser(final String description, final String usage, final String longDescription)
{ this(description, usage, longDescription, null, false);
}
/**
* <p>Constructor</p>
* <p>
* The short description is printed on same line as the program name
* </p>
*
* @param description Short, single-line, description of the program
* @param usage Formated, multi-line, usage text, may be {@code null}
* @param longDescription Long, multi-line, description of the program, may be {@code null}
* @param useStderr Whether to use stderr instead of stdout
*/
public ArgParser(final String description, final String usage, final String longDescription, final boolean useStderr)
{ this(description, usage, longDescription, null, useStderr);
}
/**
* <p>Constructor</p>
* <p>
* The short description is printed on same line as the program name
* </p>
*
* @param description Short, single-line, description of the program
* @param usage Formated, multi-line, usage text, may be {@code null}
* @param longDescription Long, multi-line, description of the program, may be {@code null}
* @param program The name of the program, {@code null} for automatic
*/
public ArgParser(final String description, final String usage, final String longDescription, final String program)
{ this(description, usage, longDescription, program, false);
}
/**
* <p>Constructor</p>
* <p>
* The short description is printed on same line as the program name
* </p>
*
* @param description Short, single-line, description of the program
* @param usage Formated, multi-line, usage text, may be {@code null}
* @param longDescription Long, multi-line, description of the program, may be {@code null}
* @param program The name of the program, {@code null} for automatic
* @param useStderr Whether to use stderr instead of stdout
*/
public ArgParser(final String description, final String usage, final String longDescription, final String program, final boolean useStderr)
{
this.linuxvt = System.getenv("TERM") == null ? false : System.getenv("TERM").equals("linux");
String prog = program == null ? ArgParser.parentName(0, true) : program;
this.program = prog == null ? "?" : prog;
this.description = description;
this.usage = usage;
this.longDescription = longDescription;
this.out = useStderr ? System.err : System.out;
}
/**
* Whether the Linux VT is being used
*/
public boolean linuxvt;
/**
* The name of the executed command
*/
public final String program;
/**
* Short, single-line, description of the program
*/
private final String description;
/**
* Formated, multi-line, usage text, {@code null} if none
*/
private final String usage;
/**
* Long, multi-line, description of the program, {@code null} if none
*/
private final String longDescription;
/**
* The error output stream
*/
private final OutputStream out;
/**
* The passed arguments
*/
public String[] arguments = null;
/**
* The number of unrecognised arguments
*/
public int unrecognisedCount = 0;
/**
* Options, in order
*/
private final ArrayList<Option> options = new ArrayList<Option>();
/**
* Option map
*/
public final HashMap<String, Option> optmap = new HashMap<String, Option>();
/**
* The arguments passed that is not tied to an option
*/
public final ArrayList<String> files = new ArrayList<String>();
/**
* Parsed arguments, a map from option to arguments, {@code null} if not used,
* add one {@code null} element per argumentless use.
*/
public final HashMap<String, String[]> opts = new HashMap<String, String[]>();
/**
* Option class
*/
public class Option
{
/**
* Constructor
*
* @param alternatives Alterative option names
* @param standard Standard option index
* @param argument Argument name, not for argumentless options
*/
protected Option(final String[] alternatives, final int standard, final String argument)
{
this.alternatives = alternatives;
this.standard = alternatives[standard < 0 ? (alternatives.length + standard) : standard];
this.argument = argument == null ? "ARG" : argument;
}
/**
* Alterative option names
*/
public final String[] alternatives;
/**
* Standard option name
*/
public final String standard;
/**
* Argument name, not for argumentless options
*/
public final String argument;
/**
* Help text, multi-line
*/
public String help = null;
}
/**
* Option takes no arguments
*/
public class Argumentless extends Option
{
/**
* Constructor
*
* @param alternatives Alterative option names
* @param standard Standard option index
*/
public Argumentless(final String[] alternatives, final int standard)
{ super(alternatives, standard, null);
}
/**
* Constructor
*
* @param standard Standard option index
* @param alternatives Alterative option names
*/
public Argumentless(final int standard, final String... alternatives)
{ super(alternatives, standard, null);
}
/**
* Constructor
*
* @param alternatives Alterative option names
*/
public Argumentless(final String... alternatives)
{ super(alternatives, 0, null);
}
}
/**
* Option takes one argument per instance
*/
public class Argumented extends Option
{
/**
* Constructor
*
* @param alternatives Alterative option names
* @param standard Standard option index
* @param argument Argument name
*/
public Argumented(final String[] alternatives, final int standard, final String argument)
{ super(alternatives, standard, argument);
}
/**
* Constructor
*
* @param alternatives Alterative option names
* @param argument Argument name
* @param standard Standard option index
*/
public Argumented(final String[] alternatives, final String argument, final int standard)
{ super(alternatives, standard, argument);
}
/**
* Constructor
*
* @param alternatives Alterative option names
* @param argument Argument name
*/
public Argumented(final String[] alternatives, final String argument)
{ super(alternatives, 0, argument);
}
/**
* Constructor
*
* @param standard Standard option index
* @param argument Argument name
* @param alternatives Alterative option names
*/
public Argumented(final int standard, final String argument, final String... alternatives)
{ super(alternatives, standard, argument);
}
/**
* Constructor
*
* @param argument Argument name
* @param standard Standard option index
* @param alternatives Alterative option names
*/
public Argumented(final String argument, final int standard, final String... alternatives)
{ super(alternatives, standard, argument);
}
/**
* Constructor
*
* @param argument Argument name
* @param alternatives Alterative option names
*/
public Argumented(final String argument, final String... alternatives)
{ super(alternatives, 0, argument);
}
}
/**
* Option consumes all following arguments
*/
public class Variadic extends Argumented
{
/**
* Constructor
*
* @param alternatives Alterative option names
* @param standard Standard option index
* @param argument Argument name
*/
public Variadic(final String[] alternatives, final int standard, final String argument)
{ super(alternatives, standard, argument);
}
/**
* Constructor
*
* @param alternatives Alterative option names
* @param argument Argument name
* @param standard Standard option index
*/
public Variadic(final String[] alternatives, final String argument, final int standard)
{ super(alternatives, argument, standard);
}
/**
* Constructor
*
* @param alternatives Alterative option names
* @param argument Argument name
*/
public Variadic(final String[] alternatives, final String argument)
{ super(alternatives, argument);
}
/**
* Constructor
*
* @param standard Standard option index
* @param argument Argument name
* @param alternatives Alterative option names
*/
public Variadic(final int standard, final String argument, final String... alternatives)
{ super(standard, argument, alternatives);
}
/**
* Constructor
*
* @param argument Argument name
* @param standard Standard option index
* @param alternatives Alterative option names
*/
public Variadic(final String argument, final int standard, final String... alternatives)
{ super(argument, standard, alternatives);
}
/**
* Constructor
*
* @param argument Argument name
* @param alternatives Alterative option names
*/
public Variadic(final String argument, final String... alternatives)
{ super(argument, alternatives);
}
}
/**
* Gets the name of the parent process
*
* @return The name of the parent process
*/
public static String parentName()
{
return ArgParser.parentName(1, false);
}
/**
* Gets the name of the parent process
*
* @param levels The number of parents to walk, 0 for self, and 1 for direct parent
* @return The name of the parent process
*/
public static String parentName(final int levels)
{
return ArgParser.parentName(levels, false);
}
/**
* Gets the name of the parent process
*
* @param hasInterpretor Whether the parent process is an interpretor
* @return The name of the parent process
*/
public static String parentName(final boolean hasInterpretor)
{
return ArgParser.parentName(1, hasInterpretor);
}
/**
* Gets the name of the parent process
*
* @param levels The number of parents to walk, 0 for self, and 1 for direct parent
* @param hasInterpretor Whether the parent process is an interpretor
* @return The name of the parent process
*/
public static String parentName(final int levels, final boolean hasInterpretor)
{
int pid;
try
{ pid = Integer.parseInt((new File("/proc/self")).getCanonicalPath().substring(6));
}
catch (final Throwable err)
{ return null;
}
int lvl = levels;
try
{ outer:
while (lvl > 1)
{
InputStream is = null;
try
{ is = new FileInputStream(new File("/proc/" + pid + "/status"));
byte[] data = new byte[is.available()];
int off = 0;
while (off != data.length)
off += is.read(data, off, data.length - off);
String[] lines = (new String(data, "UTF-8")).split("\n");
for (String line : lines)
{ if (line.startsWith("PPid:"))
{
line = line.substring(5).replace('\t', ' ').replace(" ", "");
pid = Integer.parseInt(line);
lvl -= 1;
continue outer;
} }
return null;
}
finally
{ if (is != null)
try
{ is.close();
}
catch (final Throwable ignore)
{ /* ignore */
} }
}
InputStream is = null;
try
{ is = new FileInputStream(new File("/proc/" + pid + "/cmdline"));
byte[] data = new byte[is.available()];
int off = 0;
while (off != data.length)
off += is.read(data, off, data.length - off);
String[] cmdline = new String(data, 0, off - 1, "UTF-8").split("\0");
if (hasInterpretor == false)
{ String rc = cmdline[0];
return rc.length() == 0 ? null : rc;
}
boolean dashed = false;
for (int i = 1, n = cmdline.length; i < n; i++)
{
if (dashed)
return cmdline[i];
if (cmdline[i].equals("--"))
dashed = true;
else if (cmdline[i].equals("-cp") || cmdline[i].equals("-classpath"))
i++;
else if (cmdline[i].startsWith("-") == false)
return cmdline[i];
}
}
finally
{ if (is != null)
try
{ is.close();
}
catch (final Throwable ignore)
{ /* ignore */
} }
return null;
}
catch (final Throwable err)
{ return null;
}
}
/**
* Print an empty line to the selected error channel
*/
private void println()
{
this.print("\n", true);
}
/**
* Print an empty line to the selected error channel
*
* @param flush Whether to flush the stream
*/
private void println(final boolean flush)
{
this.print("\n", flush);
}
/**
* Print a text with an added line break to the selected error channel
*/
private void println(final String text)
{
this.print(text + "\n", true);
}
/**
* Print a text with an added line break to the selected error channel
*
* @param flush Whether to flush the stream
*/
private void println(final String text, final boolean flush)
{
this.print(text + "\n", flush);
}
/**
* Print a text to the selected error channel
*/
private void print(final String text)
{
this.print(text, false);
}
/**
* Print a text to the selected error channel
*
* @param flush Whether to flush the stream
*/
private void print(final String text, final boolean flush)
{
try
{ if (text != null)
this.out.write(text.getBytes("UTF-8"));
if (flush)
this.out.flush();
}
catch (final Throwable ignore)
{ /* ignore */
}
}
/**
* Add an option
*
* @param option The option
*/
public void add(final Option option)
{
this.options.add(option);
for (final String alternative : option.alternatives)
this.optmap.put(alternative, option);
this.opts.put(option.standard, null);
}
/**
* Add an option
*
* @param option The option
* @param help Help text, multi-line
*/
public void add(final Option option, final String help)
{
this.add(help, option);
}
/**
* Add an option
*
* @param help Help text, multi-line
* @param option The option
*/
public void add(final String help, final Option option)
{
this.add(option);
option.help = help;
}
/**
* Maps up options that are alternatives to the first alternative for each option
*/
public void supportAlternatives()
{
for (final String opt : this.optmap.keySet())
this.opts.put(opt, this.opts.get(this.optmap.get(opt).standard));
}
/**
* Checks for option conflicts
*
* @param exclusives Exclusive options
* @param exitValue The value to exit with on the check does not pass,
* @return Whether at most one exclusive option was used
*/
public boolean testExclusiveness(final Set<String> exclusives, final int exitValue)
{
boolean rc = this.testExclusiveness(exclusives);
if (rc == false)
System.exit(exitValue);
return rc;
}
/**
* Checks for option conflicts
*
* @param exclusives Exclusive options
* @return Whether at most one exclusive option was used
*/
public boolean testExclusiveness(final Set<String> exclusives)
{
final ArrayList<String> used = new ArrayList<String>();
for (final String opt : this.opts.keySet())
if ((this.opts.get(opt) != null) && exclusives.contains(opt))
used.add(opt);
if (used.size() > 1)
{ String msg = this.program + ": conflicting options:";
for (final String opt : used)
if (this.optmap.get(opt).standard.equals(opt))
msg += " " + opt;
else
msg += " " + opt + "(" + this.optmap.get(opt).standard + ")";
this.println(msg, true);
return false;
}
return true;
}
/**
* Checks for out of context option usage
*
* @param allowed Allowed options
* @param exitValue The value to exit with on the check does not pass,
* @return Whether only allowed options was used
*/
public boolean testAllowed(final Set<String> allowed, final int exitValue)
{
boolean rc = this.testAllowed(allowed);
if (rc == false)
System.exit(exitValue);
return rc;
}
/**
* Checks for out of context option usage
*
* @param allowed Allowed options
* @return Whether only allowed options was used
*/
public boolean testAllowed(final Set<String> allowed)
{
boolean rc = true;
for (final String opt : this.opts.keySet())
if ((this.opts.get(opt) != null) && (allowed.contains(opt) == false))
{ String msg = this.program + ": option used out of context: " + opt;
if (opt.equals(this.optmap.get(opt).standard) == false)
msg += "(" + this.optmap.get(opt).standard + ")";
this.println(msg, true);
rc = false;
}
return rc;
}
/**
* Checks the correctness of the number of used non-option arguments
*
* @param min The minimum number of files
* @param exitValue The value to exit with on the check does not pass
* @return Whether the usage was correct
*/
public boolean testFilesMin(final int min, final int exitValue)
{
boolean rc = this.testFilesMin(min);
if (rc == false)
System.exit(exitValue);
return rc;
}
/**
* Checks the correctness of the number of used non-option arguments
*
* @param min The minimum number of files
* @return Whether the usage was correct
*/
public boolean testFilesMin(final int min)
{
return min <= this.files.size();
}
/**
* Checks the correctness of the number of used non-option arguments
*
* @param max The maximum number of files
* @param exitValue The value to exit with on the check does not pass
* @return Whether the usage was correct
*/
public boolean testFilesMax(final int max, final int exitValue)
{
boolean rc = this.testFilesMax(max);
if (rc == false)
System.exit(exitValue);
return rc;
}
/**
* Checks the correctness of the number of used non-option arguments
*
* @param max The maximum number of files
* @return Whether the usage was correct
*/
public boolean testFilesMax(final int max)
{
return this.files.size() <= max;
}
/**
* Checks the correctness of the number of used non-option arguments
*
* @param min The minimum number of files
* @param max The maximum number of files
* @param exitValue The value to exit with on the check does not pass
* @return Whether the usage was correct
*/
public boolean testFiles(final int min, final int max, final int exitValue)
{
boolean rc = this.testFiles(min, max);
if (rc == false)
System.exit(exitValue);
return rc;
}
/**
* Checks the correctness of the number of used non-option arguments
*
* @param min The minimum number of files
* @param max The maximum number of files
* @return Whether the usage was correct
*/
public boolean testFiles(final int min, final int max)
{
return (min <= this.files.size()) && (this.files.size() <= max);
}
/**
* Prints a colourful help message
*/
public void help()
{
final String dash = this.linuxvt ? "-" : "—";
this.println("\033[01m" + program + "\033[21m " + dash + " " + this.description + "\n", false);
if (this.longDescription != null)
this.println(longDescription, false);
this.println(false);
if (this.usage != null)
{ this.print("\033[01mUSAGE:\033[21m");
boolean first = true;
for (final String line : this.usage.split("\n"))
{ if (first)
first = false;
else
this.print(" or");
this.println("\t" + line, false);
}
this.println(false);
}
int maxfirstlen = 0;
for (final Option opt : this.options)
{ if (opt.help == null)
continue;
if (opt.alternatives.length > 1)
if (maxfirstlen < opt.alternatives[0].length())
maxfirstlen = opt.alternatives[0].length();
}
String empty = " ";
while (empty.length() < maxfirstlen)
empty += empty;
empty = empty.substring(0, maxfirstlen);
this.println("\033[01mSYNOPSIS:\033[21m", false);
final ArrayList<String> lines = new ArrayList<String>();
final ArrayList<int[]> lens = new ArrayList<int[]>();
for (final Option opt : this.options)
{ if (opt.help == null)
continue;
int l = 0;
String first = opt.alternatives[0];
String last = opt.alternatives[opt.alternatives.length - 1];
if (first == last)
first = empty;
else
first += empty.substring(first.length());
String line = " \033[02m" + first + "\033[22m \0" + last;
l += first.length() + 6 + last.length();
if (opt instanceof Variadic)
{ line += " [\033[04m" + opt.argument + "\033[24m...]";
l += opt.argument.length() + 6;
}
else if (opt instanceof Argumented)
{ line += " \033[04m" + opt.argument + "\033[24m";
l += opt.argument.length() + 1;
}
lines.add(line);
lens.add(new int[] { l });
}
int col = lens.size();
col += 8 - ((col - 4) & 7);
int index = 0;
while (empty.length() < col)
empty += empty;
empty = empty.substring(0, col);
for (final Option opt : this.options)
{ if (opt.help == null)
continue;
boolean first = true;
final String colour = (index & 1) == 0 ? "36" : "34";
{ String line = lines.get(index).replace("\0", "\033[" + colour + ";01m");
line += empty.substring(lens.get(index)[0]);
this.print(line, false);
}
for (final String line : opt.help.split("\n"))
if (first)
{ first = false;
print(line + "\033[00m\n");
}
else
print(empty + "\033[" + colour + "m" + line + "\033[00m\n");
index++;
}
this.println(true);
}
/**
* Parse arguments
*
* @param args The command line arguments, however it should not include the execute file at index 0
* @return Whether no unrecognised option is used
*/
public boolean parse(final String[] argv)
{
this.arguments = argv;
final ArrayList<String> argqueue = new ArrayList<String>();
final ArrayList<String> optqueue = new ArrayList<String>();
final ArrayList<String> queue = new ArrayList<String>();
for (final String arg : argv)
queue.add(arg);
boolean dashed = false, tmpdashed = false, rc = true;
int get = 0, dontget = 0;
while (queue.size() > 0)
{ final String arg = queue.remove(0);
if ((get > 0) && (dontget == 0))
{ get--;
argqueue.add(arg);
}
else if (tmpdashed)
{ this.files.add(arg);
tmpdashed = false;
}
else if (dashed) this.files.add(arg);
else if (arg.equals("++")) tmpdashed = true;
else if (arg.equals("--")) dashed = true;
else if ((arg.length() > 1) && ((arg.charAt(0) == '-') || (arg.charAt(0) == '+')))
if ((arg.length() > 2) && (arg.charAt(1) == arg.charAt(0)))
{ Option opt = this.optmap.get(arg);
if (dontget > 0)
dontget--;
else if ((opt != null) && (opt.getClass() == Argumentless.class))
{ optqueue.add(arg);
argqueue.add(null);
}
else if (arg.contains("="))
{ String arg_opt = arg.substring(0, arg.indexOf('='));
Option arg_opt_opt = this.optmap.get(arg_opt);
if ((arg_opt_opt != null) && (arg_opt_opt instanceof Argumented))
{ optqueue.add(arg_opt);
argqueue.add(arg.substring(arg.indexOf('=') + 1));
if (arg_opt_opt instanceof Variadic)
dashed = true;
}
else
{ if (++this.unrecognisedCount <= 5)
this.println(this.program + ": warning: unrecognised option " + arg, true);
rc = false;
}
}
else if ((opt != null) && (opt.getClass() == Argumented.class))
{ optqueue.add(arg);
get++;
}
else if ((opt != null) && (opt.getClass() == Variadic.class))
{ optqueue.add(arg);
argqueue.add(null);
dashed = true;
}
else
{ if (++this.unrecognisedCount <= 5)
this.println(this.program + ": warning: unrecognised option " + arg, true);
rc = false;
}
}
else
{ String sign = String.valueOf(arg.charAt(0)), narg;
int i = 1, n = arg.length();
while (i < n)
{ Option opt = this.optmap.get(narg = sign + arg.charAt(i++));
if (opt != null)
if (opt.getClass() == Argumentless.class)
{ optqueue.add(narg);
argqueue.add(null);
}
else if (opt.getClass() == Argumented.class)
{ optqueue.add(narg);
String nargarg = arg.substring(i);
if (nargarg.length() == 0)
get++;
else
argqueue.add(nargarg);
break;
}
else
{ optqueue.add(narg);
String nargarg = arg.substring(i);
argqueue.add(nargarg.length() > 0 ? nargarg : null);
dashed = true;
break;
}
else
{ if (++this.unrecognisedCount <= 5)
this.println(this.program + ": warning: unrecognised option " + arg, true);
rc = false;
}
} }
else
this.files.add(arg);
}
return rc;
}
}
