find files by extension html under a folder in nodejs

Question

I d like to find all   html files in src folder and all its sub folders using nodejs  What is the best way to do it    var folder     project1 src   var extension    html   var cb   function err  results          results is an array of the files with path relative to the folder    console log results         This function is what I am looking for  It has to recursively traverse all sub folders   findFiles folder  extension  cb     I think a lot developers should have great and tested solution and it is better to use it than writing one myself

User · Answer

You can use Filehound to do this    For example  find all  html files in  tmp   const Filehound   require  filehound     Filehound create      ext  html      paths   tmp      find  err  htmlFiles    gt        if  err  return console error  handle err   err        console log htmlFiles         For further information  and examples   check out the docs  https   github com nspragg filehound  Disclaimer  I m the author

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I have looked at the above answers and have mixed together this version which works for me   function getFilesFromPath path  extension        let files   fs readdirSync  path        return files filter  file   gt  file match new RegExp         extension      ig         console log getFilesFromPath    testdata     txt       This test will return an array of filenames from the files found in the folder at the path   testdata  Working on node version 8 11 3

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Take a look into file-regex  let findFiles   require  file-regex   let pattern      js   findFiles   dirname  pattern   err  files    gt         console log files        This above snippet would print all the js files in the current directory

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What  hang on       Okay ya  maybe this makes more sense to someones else too    nodejs 7 mind you   fs   import  fs    let dirCont   fs readdirSync  dir    let files   dirCont filter  function  elm    return elm match       htm html  ig        Do whatever with regex make it an argument you set in the function with a default etc

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i like using the glob package   const glob   require  glob     glob   dirname          html        err  files   gt     console log files

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Can t add a comment because of reputation  but notice the following   Using fs readdir or node-glob to find a wildcard set of files in a folder of 500 000 files took  2s  Using exec with DIR took  0 05s  non recursive  or  0 45s  recursive    I was looking for  14 files matching my pattern in a single directory    So far  I have failed to find any nodejs implementation which uses low level OS wildcard searching for efficiency   But the above DIR ls based code works wonderfully in windows in terms of efficiency   linux find  however  will likely be very slow for large directories

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Old post but ES6 now handles this out of the box with the includes method   let files     file json    other js     let jsonFiles   files filter file   gt  file includes   json      console log  Files     jsonFiles     gt    file json

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Based on Lucio s code  I made a module  It will return an away with all the files with specific extensions under the one  Just post it here in case anybody needs it    var path   require  path         fs     require  fs             Find all files recursively in specific folder with specific extension  e g     findFilesInDir    project src     html      gt      project src a html     project src build index html       param   String  startPath    Path relative to this file or other file which requires this files     param   String  filter       Extension name  e g    html      return  Array                Result files with path string in an array     function findFilesInDir startPath filter        var results            if   fs existsSync startPath            console log  no dir   startPath           return             var files fs readdirSync startPath       for var i 0 i lt files length i             var filename path join startPath files i            var stat   fs lstatSync filename           if  stat isDirectory                 results   results concat findFilesInDir filename filter      recurse                   else if  filename indexOf filter  gt  0                console log  -- found    filename               results push filename                       return results     module exports   findFilesInDir

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The following code does a recursive search inside     change it appropriately  and returns an array of absolute file names ending with  html  var fs   require  fs    var path   require  path     var searchRecursive   function dir  pattern         This is where we store pattern matches of all files inside the directory   var results             Read contents of directory   fs readdirSync dir  forEach function  dirInner           Obtain absolute path     dirInner   path resolve dir  dirInner           Get stats to determine if path is a directory or a file     var stat   fs statSync dirInner           If path is a directory  scan it and combine results     if  stat isDirectory            results   results concat searchRecursive dirInner  pattern                  If path is a file and ends with pattern then push it onto results     if  stat isFile    amp  amp  dirInner endsWith pattern           results push dirInner                  return results      var files   searchRecursive         html       replace dir and pattern                                                    as you seem fit  console log files

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I just noticed  you are using sync fs methods  that might block you application  here is a promise-based async way using async and q  you can execute it with START  myfolder FILTER   jpg  node myfile js  assuming you put the following code in a file called myfile js   Q   require  q   async   require  async   path   require  path   fs   require  fs    function findFiles startPath  filter  files       var deferred      deferred   Q defer      main deferred        read directory     Q nfcall fs readdir  startPath  then function list            var ideferred   Q defer      inner deferred for resolve of async each           async crawling through dir         async each list  function item  done                   stat current item in dirlist             return Q nfcall fs stat  path join startPath  item                    then function stat                          check if item is a directory                     if  stat isDirectory                                recursive   find files in subdirectory                         return findFiles path join startPath  item   filter  files                               catch function error                                   console log  could not read path      error toString                                                                 finally function                                       resolve async job after promise of subprocess of finding files has been resolved                                 return done                                                           check if item is a file  that matches the filter and add it to files array                       else if  item indexOf filter   gt   0                            files push path join startPath  item                            return done                          file is no directory and does not match the filefilter - gt  don t do anything                       else                           return done                                                              catch function error                       ideferred reject  Could not stat      error toString                                    function                 return ideferred resolve      async each has finished  so resolve inner deferred                     return ideferred promise         then function               here you could do anything with the files of this recursion step  otherwise you would only need ONE deferred          return deferred resolve files     resolve main deferred        catch function error            deferred reject  Could not read dir      error toString             return             return deferred promise      findFiles process env START  process env FILTER           then function files           console log files               catch function error           console log  Problem finding files      error

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my two pence  using map in place of for-loop  var path   require  path    fs   require  fs     var findFiles   function folder  pattern         callback      var flist          fs readdirSync folder  map function e        var fname   path join folder  e       var fstat   fs lstatSync fname       if  fstat isDirectory               don t want to produce a new array with concat       Array prototype push apply flist  findFiles fname  pattern  callback           else         if  pattern test fname             flist push fname           if  callback              callback fname                                   return flist         HTML files    var html files   findFiles myPath     html    function o    console log  look what we have found       o         All files var all files   findFiles myPath

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node js  recursive simple function   var path   require  path    fs require  fs     function fromDir startPath filter          console log  Starting from dir   startPath            if   fs existsSync startPath            console log  no dir   startPath           return             var files fs readdirSync startPath       for var i 0 i lt files length i             var filename path join startPath files i            var stat   fs lstatSync filename           if  stat isDirectory                 fromDir filename filter     recurse                   else if  filename indexOf filter  gt  0                console log  -- found    filename                         fromDir     LiteScript    html      add RegExp if you want to get fancy  and a callback to make it generic    var path   require  path    fs require  fs     function fromDir startPath filter callback          console log  Starting from dir   startPath            if   fs existsSync startPath            console log  no dir   startPath           return             var files fs readdirSync startPath       for var i 0 i lt files length i             var filename path join startPath files i            var stat   fs lstatSync filename           if  stat isDirectory                 fromDir filename filter callback     recurse                   else if  filter test filename   callback filename              fromDir     LiteScript     html   function filename       console log  -- found    filename

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Install you can install this package walk-sync by yarn add walk-sync  Usage const walkSync   require  quot walk-sync quot    const paths   walkSync  quot   project1 src quot    globs    quot      html quot      console log paths       all html file path array

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You can use OS help for this  Here is a cross-platform solution   1  The bellow function uses ls and dir and does not search recursively but it has relative paths   var exec   require  child process   exec  function findFiles folder extension cb       var command           if   win  test process platform            command    dir  B   folder        extension       else          command    ls -1   folder       extension            exec command function err stdout stderr           if err              return cb err null             get rid of  r from windows         stdout   stdout replace   r g              var files   stdout split   n              remove last entry because it is empty         files splice -1 1           cb err files              findFiles  folderName   html  function err files       console log  files   files        2  The bellow function uses find and dir  searches recursively but on windows it has absolute paths  var exec   require  child process   exec  function findFiles folder extension cb       var command           if   win  test process platform            command    dir  B  s   folder        extension       else          command    find   folder   -name      extension               exec command function err stdout stderr           if err              return cb err null             get rid of  r from windows         stdout   stdout replace   r g              var files   stdout split   n              remove last entry because it is empty         files splice -1 1           cb err files              findFiles  folder   html  function err files       console log  files   files

[node.js] find files by extension, *.html under a folder in nodejs

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