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Copy pathinout
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executable file
·147 lines (122 loc) · 3.27 KB
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const
fs=require("fs"),
rw=require("rw"),
JSONstat=require("jsonstat-toolkit"),
dataset=function(contents){
let json;
try{
json=JSON.parse(contents);
}catch (e){
console.error("Error: The input does not containt JSON.");
process.exit(1);
}
const j=JSONstat(json);
if(j.length===0 ||
(
j.class!=="dataset" &&
j.class!=="collection" &&
j.class!=="bundle"
)
){
console.error("Error: The input does not containt JSON-stat.");
process.exit(1);
}
const ds=(j.class==="dataset") ? j : j.Dataset(0);
let
i=ds.length,
len=1
;
for(; i--;){
len*=ds.Dimension(i).length;
}
if(len!==ds.n){
console.error("Error: The input does not containt valid JSON-stat.");
process.exit(1);
}
return ds;
},
main=function(argv, callback, isString, outBinary, inBinary){
var
outcoding=outBinary ? null : "utf8",
incoding=inBinary ? null : "utf8"
;
if(!argv.stream){
if(argv._.length<2){
console.error("Error: When --stream is not enabled you must specify two filenames.");
process.exit(1);
}
//arguments
var
result,
input=argv._[0],
out=function(output, content, big){
if(fs.existsSync(output)){
console.log("Warning: " + output + " already exists.");
var d=new Date();
output+="-" + d.toJSON().replace(/-|:|\.|T|Z/g, "");
if(fs.existsSync(output)){
console.error("Error: Tried" + output + " but it already exists too. Run again.");
process.exit(1);
}
console.log("Warning: Using " + output + " instead.");
}
//So far, only in the non-stream interface...
if(big && Array.isArray(content)){
var
len=content.length,
half=Math.ceil(len/2),
first=content.slice(0, half),
second=content.slice(half-len)
;
fs.writeFileSync(output, first.join("\n")+"\n", { flag: "a+" });
fs.writeFileSync(output, second.join("\n")+"\n", { flag: "a+" });
}else{
if(fs.writeFileSync(output, content, outcoding)===false){
console.error("Error: Couldn't create " + output + ".");
process.exit(1);
}
}
console.log("Success: " + output + " has been created.");
process.exit(0);
}
;
if(!fs.existsSync(input)){
console.error("Error: " + input + " does not exist.");
process.exit(1);
}
if(outBinary){//2arrow
result=callback( fs.readFileSync(input, incoding) );
out(argv._[1], result);
}else{
result=(isString) ?
callback( fs.readFileSync(input, incoding) )
:
JSON.stringify( callback( fs.readFileSync(input, incoding) ) )
;
out(argv._[1], result, !argv.stream && argv.big);
}
}else{ //streams
if(argv._.length>1){
console.error("Error: With --stream enabled no input/output filename can be specified.");
process.exit(1);
}
if(outBinary){
isString=true; //Is not really a string but it's not an object that should be stringified either
}
rw.readFile("/dev/stdin", incoding, function(error, contents){
rw.writeFile("/dev/stdout",
(isString) ?
callback(contents)
:
JSON.stringify( callback(contents) ),
outcoding,
function(err){
process.exit( +(err===null) );
}
);
});
}
}
;
module.exports.dataset=dataset;
module.exports.main=main;