CLIte/clite/libclite.js

clite.libs.data = function() {

clite.libs.load('libclite','clite',function(io,env) {

return Object.create({

	// returns an absolute path: ('foo','/etc') -> '/etc/foo': ('foo','bar') -> $PWD/bar/foo
	resolvePath:function(txt,base) {
		if (txt == '/')
			return txt;
		if (txt[0] == '~')
			txt = env.HOME+txt.substring(1);
		if (txt[0] == '.')
			txt = env.PWD+'/'+txt;
		var path = txt;
		if (txt[0] != '/') {
			if (typeof base != 'string')
				base = env.PWD;
			if (base[0] != '/')
				base = env.PWD+'/'+base;
			path = base+'/'+txt;
		}
		var parts = path.split('/');
		path = '';
		var i;
		while ((i = parts.indexOf('.')) != -1) {
			parts.splice(i,1);
		}
		while ((i = parts.indexOf('')) != -1) {
			parts.splice(i,1);
		}
		while ((i = parts.indexOf('..')) != -1) {
			parts.splice(i-1,2);
		}
		path = '/'+parts.join('/');
		return path;
	},
	// convert a string into an argument array: 'ls /etc' -> ['ls','/etc'], supports "quoted arguments" and `command substitutions`
	strToArgs:function(txt) {
		var parts = [];
		var sp = '';
		var s = '';
		var e = false;
		var q = false;
		var c = false;
		for (var i=0; i<txt.length; i++) {
			switch (txt[i]) {
			case '//':
				if (e) {
					s+='//';
				}else{
					e = true;
				}
				break;
			case '`':
				if (!e) {
					if (!c) {
						c = true;
						s += '`';
					}else{
						s += '`';
						c = false;
					}
				}else{
					s += txt[i];
					e = false;
				}
				break;
			case '"':
			case "'":
				if (!e) {
					if (!q) {
						sp = txt[i];
						q = true;
					}else if (txt[i] == sp) {
						sp = '';
						q = false;
					}
				}else{
					s += txt[i];
					e = false;
				}
				break;
			case ' ':
				if (!q && !c) {
					parts.push(s);
					s = '';
					e = false;
					q = false;
					break;
				}
			default:
				s+=txt[i];
				e = false;
			}
		}
		if (s.length > 0)
			parts.push(s);
		// TODO: resolve all paths passed as arguments? - catches ~ and * etc
		return parts;
	},

	ptrnew:function() {
		return Object.create({value:null});
	},
	ptrset:function(ptr,val) {
		ptr.value = val;
	},
	ptrget:function(ptr) {
		if (typeof ptr.value === 'undefined')
			return null;
		return ptr.value;
	}

});

});

}