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async-walk-dir
Advanced tools
Readme
Useful directory walker
npm i async-walk-dir
let walkOptions={//these are default values
//scan depth, minimal value is 1
depth:Infinity,
//exclude sub-path in posix format, e.g. 'a/b/c'
exclude:[],
//call async callback function in parallel (not wait them before the walker ends)
//not working in async generator mode
asyncCallbackInParallel:false,//can be a number for max parallel tasks
//file type filter
types:['File','Directory','BlockDevice','CharacterDevice','FIFO','Socket','SymbolicLink'],
//use Stats object instead of Dirent object in callback info
withStats:false,
//define a function that will be called on each sub-directory, if not return true, this directory will not be processed. (include the input dir)
onDirectory:dir=>{return true},
}
walkOptions.withStats
is true, this will be a Stats object, otherwise this will be a Dirent Object. Additional properties are:
walkOptions.types
.Parameters are the same as callback's.
There are two modes you can use: callback mode
and async generator mode
. With async generator mode
, you can break at where you want in for await
.
const {walkFilter}=require('async-walk-dir');
walkFilter(__dirname+'/..', (subDir,info)=>{//filter function
if(info.size > 2048)return true;//filter file whose size > 2048 Bytes
}, (subDir, info)=>{//callback
console.log(info.type, '\t', subDir, info.name, info.size);
}, {//options
withStats:true,//use Stats object so we can get file size for filter
depth:2,//limit scan depth to 2
exclude:['.git'],//ignore '.git' directory and its children
types:['File','Directory'],
});
//The filter can be a REGEXP
walkFilter(__dirname+'/..',
/.+\.js$/,//matcher
(subDir, info)=>{//callback
console.log(info.type, '\t', subDir, info.name, info.size);
},
{//options
withStats:true,//use Stats object so we can get file size for filter
depth:2,//limit scan depth to 2
exclude:['.git'],//ignore '.git' directory and its children
types:['File','Directory'],
}
);
const {walkFilterGenerator}=require('async-walk-dir');
(async ()=>{
//get the generator
let gen=walkFilterGenerator(__dirname+'/..', info=>{//filter function
if(info.size > 2048)return true;//filter file whose size > 2048 Bytes
}, {//options example
withStats:true,//use Stats object so we can get file size for filter
});
//use 'for await' for async generator and you can break at where you want
for await(let [subDir,info] of gen){
console.log(info.type,'\t', subDir, info.name);
if(info.name === 'poi')break;//break when find a file named 'poi'
}
})();
const {walkFilter}=require('async-walk-dir');
walkFilter(__dirname+'/..', info=>{
if(info.size > 2048)return true;//get file which size > 2048 Bytes
},async (subDir,info)=>{
return new Promise((ok,fail)=>{
setTimeout(()=>{//set a random timout,in parallel mode the log will print in random order
console.log(info.type, '\t', subDir, info.name, info.size);
ok();
},5000*Math.random());
})
},{
withStats:true,//use Stats object so we can get file size for filter
asyncCallbackInParallel:4,//run 4 tasks at the same time
});
FAQs
useful directory walker
The npm package async-walk-dir receives a total of 0 weekly downloads. As such, async-walk-dir popularity was classified as not popular.
We found that async-walk-dir demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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