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set command for command.js

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This commit is contained in:
minjaesong
2020-11-05 14:25:47 +09:00
parent 8643f354e6
commit e201f591b8
3 changed files with 73 additions and 10 deletions
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55
assets/tvdos/bin/command.js
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@@ -1,6 +1,5 @@
let PROMPT_TEXT = ">";
let CURRENT_DRIVE = "A";
let executableExtensions = [".com",".bat",".js", ""]; Object.freeze(executableExtensions);
let shell_pwd = [];
let goInteractive = false;
@@ -111,6 +110,14 @@ shell.parse = function(input) {
}
shell.coreutils = {
/* Args follow this format:
* <command-name> <1st arg> <2nd arg> ...
* NOTE:
* even if there's no 1st arg, length of args may not be 1, therefore don't:
* if (args.length < 2)
* but do instead:
* if (args[1] === undefined)
*/
cd: function(args) {
if (args[1] === undefined) {
println(shell_pwd.join("\\"));
@@ -136,6 +143,38 @@ shell.coreutils = {
},
rem: function(args) {
return 0;
},
set: function(args) {
// print all the env vars
if (args[1] === undefined) {
Object.entries(_TVDOS.variables).forEach(function(a) { println(a[0]+"="+a[1]); })
}
else {
// parse key-value pair with splitter '='
let key = undefined; let value = undefined;
// if syntax "<key> = <value>" is used?
if ('=' == args[2]) {
key = args[1].toUpperCase(); value = args[3];
}
else if (args[2] === undefined) {
let pair = args[1].split('=');
key = pair[0].toUpperCase(); value = pair[1];
}
if (key == undefined) throw SyntaxError("Input format must be 'key=value'");
// if value is undefined, show what envvar[key] has
if (value === undefined) {
if (_TVDOS.variables[key] === undefined)
println("Environment variable '"+key+"' not found");
else
println(_TVDOS.variables[key])
}
else {
// TODO parse %var_name% line
_TVDOS.variables[key] = value;
}
}
}
};
Object.freeze(shell.coreutils);
@@ -155,14 +194,18 @@ shell.execute = function(line) {
// search through PATH for execution
let fileExists = false;
let searchDir = (cmd.startsWith("\\")) ? [""] : ["\\"+shell_pwd.join("\\")].concat(_TVDOS.defaults.path);
searchDir.forEach(function(it) { serial.println("Searchdir: "+it); });
let searchDir = (cmd.startsWith("\\")) ? [""] : ["\\"+shell_pwd.join("\\")].concat(_TVDOS.getPath());
let pathExt = [];
// fill pathExt using %PATHEXT% but also capitalise them
if (cmd.split(".")[1] === undefined)
_TVDOS.variables.PATHEXT.split(';').forEach(function(it) { pathExt.push(it); pathExt.push(it.toUpperCase()); });
else
pathExt.push(""); // final empty extension
searchLoop:
for (let i = 0; i < searchDir.length; i++) {
for (let j = 0; j < executableExtensions.length; j++) {
let path = (searchDir[i] + cmd + executableExtensions[j]).substring(1); // without substring, this will always prepend revslash
for (let j = 0; j < pathExt.length; j++) {
let path = (searchDir[i] + cmd + pathExt[j]).substring(1); // without substring, this will always prepend revslash
if (filesystem.open(CURRENT_DRIVE, path, "R")) {
fileExists = true;
break searchLoop;