archive-gh-me/mathjs
1
0
Fork 0
mirror of https://github.com/josdejong/mathjs.git synced 2026-01-25 15:07:57 +00:00
Code Issues Projects Releases Wiki Activity

Merge pull request #336 from FSMaxB/cli

Browse Source 
`toTex` and `toString` support for the command line interface
This commit is contained in:
Jos de Jong 2015-04-24 13:53:41 +02:00
commit d095889ea6
1 changed files with 112 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

169
bin/cli.js
View File

@ -9,16 +9,19 @@
*
* Usage:
*
* mathjs [scriptfile] {OPTIONS}
* mathjs [scriptfile(s)] {OPTIONS}
*
* Options:
*
* --version, -v Show application version
* --help, -h Show this message
* --tex Generate LaTeX instead of evaluating
* --string Generate string instead of evaluating
*
* Example usage:
* mathjs Open a command prompt
* mathjs script.txt Run a script file
* mathjs script1.txt script2.txt Run two script files
* mathjs script.txt > results.txt Run a script file, output to file
* cat script.txt | mathjs Run input stream
* cat script.txt | mathjs > results.txt Run input stream, output to file
@ -132,8 +135,9 @@ function completer (text) {
* the output.
* @param input Input stream
* @param output Output stream
* @param mode Output mode
*/
function runStream (input, output) {
function runStream (input, output, mode) {
var readline = require('readline'),
rl = readline.createInterface({
input: input || process.stdin,
@ -151,52 +155,76 @@ function runStream (input, output) {
rl.on('line', function(line) {
var expr = line.trim();
// check for exit
if (expr.toLowerCase() == 'exit' || expr.toLowerCase() == 'quit') {
// exit application
rl.close();
}
if (expr.toLowerCase() == 'clear') {
// clear memory
parser.clear();
console.log('memory cleared');
switch (expr.toLowerCase()) {
case 'quit':
case 'exit':
// exit application
rl.close();
break;
case 'clear':
// clear memory
parser.clear();
console.log('memory cleared');
// get next input
if (rl.output.isTTY) {
rl.prompt();
}
}
else {
// evaluate expression
if (expr) {
try {
var res = parser.eval(expr);
if (res instanceof math.type.ResultSet) {
res.entries.forEach(function (entry) {
console.log(math.format(entry, PRECISION));
});
if (res.entries.length) {
// set last answer from the ResultSet as ans
parser.set('ans', res.entries[res.entries.length - 1]);
// get next input
if (rl.output.isTTY) {
rl.prompt();
}
break;
default:
if (!expr) {
break;
}
switch (mode) {
case 'eval':
// evaluate expression
try {
var res = parser.eval(expr);
if (res instanceof math.type.ResultSet) {
res.entries.forEach(function (entry) {
console.log(math.format(entry, PRECISION));
});
if (res.entries.length) {
// set last answer from the ResultSet as ans
parser.set('ans', res.entries[res.entries.length - 1]);
}
}
else if (res instanceof math.type.Help) {
console.log(res.toText(math));
}
else {
parser.set('ans', res);
console.log(math.format(res, PRECISION));
}
}
}
else if (res instanceof math.type.Help) {
console.log(res.toText(math));
}
else {
parser.set('ans', res);
console.log(math.format(res, PRECISION));
}
catch (err) {
console.log(err.toString());
}
break;
case 'string':
try {
var string = math.parse(expr).toString();
console.log(string);
}
catch (err) {
console.log(err.toString());
}
break;
case 'tex':
try {
var tex = math.parse(expr).toTex();
console.log(tex);
}
catch (err) {
console.log(err.toString());
}
break;
}
catch (err) {
console.log(err.toString());
}
}
}
// get next input
if (rl.output.isTTY) {
rl.prompt();
}
// get next input
if (rl.output.isTTY) {
rl.prompt();
}
});
@ -220,6 +248,7 @@ function outputVersion () {
var version = pkg && pkg.version ? 'v' + pkg.version : 'unknown';
console.log(version);
}
process.exit(0);
});
}
@ -235,38 +264,64 @@ function outputHelp() {
console.log('functions, and a flexible expression parser.');
console.log();
console.log('Usage:');
console.log(' mathjs [scriptfile] {OPTIONS}');
console.log(' mathjs [scriptfile(s)] {OPTIONS}');
console.log();
console.log('Options:');
console.log(' --version, -v Show application version');
console.log(' --help, -h Show this message');
console.log(' --tex Generate LaTeX instead of evaluating');
console.log(' --String Generate string instead of evaluating');
console.log();
console.log('Example usage:');
console.log(' mathjs Open a command prompt');
console.log(' mathjs script.txt Run a script file');
console.log(' mathjs script.txt script2.txt Run two script files');
console.log(' mathjs script.txt > results.txt Run a script file, output to file');
console.log(' cat script.txt | mathjs Run input streaml');
console.log(' cat script.txt | mathjs > results.txt Run input stream, output to file');
console.log();
process.exit(0);
}
/**
* Process input and output, based on the command line arguments
*/
if (process.argv.length > 2) {
var arg = process.argv[2];
if (arg == '-v' || arg == '--version') {
var queue = []; //queue of scripts that need to be processed
var mode = 'eval'; //one of 'eval', 'tex' or 'string'
process.argv.forEach(function (arg, index) {
if (index < 2) {
return;
}
switch (arg) {
case '-v':
case '--version':
outputVersion();
}
else if (arg == '-h' || arg == '--help') {
break;
case '-h':
case '--help':
outputHelp();
}
else {
// run a script file
runStream(fs.createReadStream(arg), process.stdout);
}
break;
case '--tex':
mode = 'tex';
break;
case '--string':
mode = 'string';
break;
default:
queue.push(arg);
}
});
if (queue.length === 0) {
// run a stream, can be user input or pipe input
runStream(process.stdin, process.stdout, mode);
}
else {
// run a stream, can be user input or pipe input
runStream(process.stdin, process.stdout);
//work through the queue
queue.forEach(function (arg) {
// run a script file
runStream(fs.createReadStream(arg), process.stdout, mode);
});
}