Regex to exclude sub directory-CodePudding

I'm going an automatic global registration. I'm struggling to figure how to exclude a specific sub directory. How would a regex for that look? I'm sorry to not have an example of a try but I have no idea honestly. Searching I found a few examples but it never matches to exclude just a directory.

This is how I get the components now.

const registerComponents = () => {
  const pascalCase = (name: string) => {
    return _.chain(name).camelCase().upperFirst().value()
  }

  const context = require.context('@/components', true, /\w \.(vue)$/)
  _.forEach(context.keys(), fileName => {
    const componentConfig = context(fileName)

    const name = (fileName.split('/').pop() || '').replace(/\.\w $/, '')
    const componentName = pascalCase(name)

    Vue.component(componentName, componentConfig.default || componentConfig)
  })
}

This is the structure. I would like to exclude the folder /_exclude/

components/_exclude/file.vue
components/_exclude/file2.vue
components/_exclude/svg/globe.vue
components/some-file.vue
components/svg/cart.vue

CodePudding user response：

This pattern would match all .vue files except those in _exclude/:

/^\.\/(?!_exclude\/).*\.vue$/

Breakdown of the pattern:

`^\.\/`

Match the leading ./ in the file paths returned from require.context().

`(?!_exclude\/)`

Using negative look-ahead, assert _exclude/ does not match.

`.*`

Match any character(s). Note the \w from your original pattern would have failed on file separators in the file paths.

`\.vue$`

Match the .vue file extension. Note the parentheses in (vue) from your original pattern would have created an unecessary capture group.

CodePudding user response：

In your case, easy:

console.log( 'components/_exclude/file.vue'.replace(/\/_exclude\//,'/')  ); // <- RegEx
console.log( 'components/_exclude/file2.vue'.replace('/_exclude/','/') ); // <- String
console.log( 'components/_exclude/svg/globe.vue'.replace(/\/_exclude\//,'/') );
console.log( 'components/some-file.vue'.replace(/\/_exclude\//,'/') );
console.log( 'components/svg/cart.vue'.replace(/\/_exclude\//,'/') );

console.log( ' --- Or ---' );

console.log(
`components/_exclude/file.vue
components/_exclude/file2.vue
components/_exclude/svg/globe.vue
components/some-file.vue
components/svg/cart.vue`.replace(/\/_exclude\//g,'/') // <-- Using global flag (g) in case of more than one
);

Also for taking the component name, we can use match instead:

console.log( 'components/_exclude/file.vue'.match(/(?!\/)[^/]*?(?=(?:\.[^/.] ?)?(?:[?#].*)?$)/)[0] );
console.log( 'components/folder/file.vue?query=notme.ext'.match(/(?!\/)[^/]*?(?=(?:\.[^/.] ?)?(?:[?#].*)?$)/)[0] );
console.log( 'components/folder.name/file.vue'.match(/(?!\/)[^/]*?(?=(?:\.[^/.] ?)?(?:[?#].*)?$)/)[0] );
console.log( 'components/folder/file.min.vue'.match(/(?!\/)[^/]*?(?=(?:\.[^/.] ?)?(?:[?#].*)?$)/)[0] );

Update

General idea for take the pathInfo managed:

pathInfo function

function pathInfo(s) {
    s=s.match(/(.*?\/)?(([^/]*?)(\.[^/.] ?)?)(?:[?#].*)?$/);
    return {folders:s[1],file:s[2],filename:s[3],fileext:s[4]};
}
var sample='folder/myfolder/excludeme/another/excludeme/onemore/file.min.js?query=1';
var result=pathInfo(sample);
console.log(result);
/*
{
  "folders": "folder/myfolder/excludeme/another/excludeme/onemore/",
  "file": "file.min.js",
  "filename": "file.min",
  "fileext": ".js"
}
*/
console.log(result.folders.split('/').filter(a=>a!='excludeme').join('/') result.file);
// folder/myfolder/another/onemore/file.min.js

pathInfo ( Folders list) function

function pathInfo(s) {
    s=s.match(/(.*?\/)?(([^/]*?)(\.[^/.] ?)?)(?:[?#].*)?$/);
    return {path:s[1],folders:s[1].split('/'),file:s[2],filename:s[3],fileext:s[4]};
}
var sample='folder/myfolder/excludeme/another/excludeme/onemore/file.min.js?query=1';
var result=pathInfo(sample);
console.log(result);
/*
{
  "path": "folder/myfolder/excludeme/another/excludeme/onemore/",
  "folders": [
    "folder",
    "myfolder",
    "excludeme",
    "another",
    "excludeme",
    "onemore",
    ""
  ],
  "file": "file.min.js",
  "filename": "file.min",
  "fileext": ".js"
}
*/
console.log(result.folders.filter(a=>a!='excludeme').join('/') result.file);
// folder/myfolder/another/onemore/file.min.js