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Multi extension support #37

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merged 4 commits into from
Jan 3, 2019
Merged

Multi extension support #37

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c34be8b
Added Multi extension support.
alansouzati Jun 3, 2015
14e451d
some updates
phated Jan 25, 2018
d6a0fb0
Small improvements from review
phated Jan 2, 2019
773f7b7
Handle addtional dots in a path
phated Jan 3, 2019
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22 changes: 17 additions & 5 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -9,18 +9,30 @@ exports.prepare = function (extensions, filepath, cwd, nothrow) {
var attempts = [];
var err;
var onlyErrors = true;
var ext = extension(filepath);
if (Object.keys(require.extensions).indexOf(ext) !== -1) {
var exts = extension(filepath);

var config;
var usedExtension;
if (exts) {
exts.some(function(ext) {
usedExtension = ext;
config = normalize(extensions[ext]);
return !!config;
});
}

if(Object.keys(require.extensions).indexOf(usedExtension) !== -1) {
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Boolean(require.extensions[ext]) is faster.
Or is it possible that a value of an existing key is falsy?

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Sorry, it is possible that usedExtension is undefined and require.extensions[usedExtension] becomes require.extensions['undefined'].

Cancel the above comment, or move this line after checking config is not nullish if you will modify.

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I think it's fine to keep like this.

return true;
}
var config = normalize(extensions[ext]);

if (!config) {
if (nothrow) {
return;
} else {
throw new Error('No module loader found for "'+ext+'".');
throw new Error('No module loader found for "'+usedExtension+'".');
}
}

if (!cwd) {
cwd = path.dirname(path.resolve(filepath));
}
Expand All @@ -45,7 +57,7 @@ exports.prepare = function (extensions, filepath, cwd, nothrow) {
}
}
if (onlyErrors) {
err = new Error('Unable to use specified module loaders for "'+ext+'".');
err = new Error('Unable to use specified module loaders for "'+usedExtension+'".');
err.failures = attempts;
if (nothrow) {
return err;
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16 changes: 12 additions & 4 deletions lib/extension.js
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Original file line number Diff line number Diff line change
@@ -1,11 +1,19 @@
const path = require('path');

const EXTRE = /^[.]?[^.]+([.].*)$/;
const EXTRE = /\.[^.]*/g;
const LONGEXTRE = /^[.]?[^.]+([.].+[^.])$/;

module.exports = function (input) {
var extension = EXTRE.exec(path.basename(input));
if (!extension) {
var basename = path.basename(input);
var longExtension = LONGEXTRE.exec(basename);
if (!longExtension) {
return;
}
return extension[1];
var possibleExtensions = longExtension[1].match(EXTRE);
if (!possibleExtensions) {
return;
}
return possibleExtensions.map(function (_, idx, exts) {
return exts.slice(idx).join('');
});
};
30 changes: 26 additions & 4 deletions test/index.js
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Expand Up @@ -44,10 +44,32 @@ describe('rechoir', function () {
describe('extension', function () {

it('should extract extension from filename/path from the first dot', function () {
expect(extension('file.js')).to.equal('.js');
expect(extension('file.dot.js')).to.equal('.dot.js');
expect(extension('relative/path/to/file.js')).to.equal('.js');
expect(extension('relative/path/to/file.dot.js')).to.equal('.dot.js');
expect(extension('file.js')[0]).to.equal('.js');
expect(extension('file.tmp.dot.js')[0]).to.equal('.tmp.dot.js');
expect(extension('file.tmp.dot.js')[1]).to.equal('.dot.js');
expect(extension('file.tmp.dot.js')[2]).to.equal('.js');
expect(extension('relative/path/to/file.js')[0]).to.equal('.js');
expect(extension('relative/path/to/file.dot.js')[0]).to.equal('.dot.js');
expect(extension('relative/path/to/file.dot.js')[1]).to.equal('.js');
expect(extension('relative/path.with.dot/to/file.dot.js')[0]).to.equal('.dot.js');
expect(extension('relative/path.with.dot/to/file.dot.js')[1]).to.equal('.js');
});

it('does not match any if the path ends in a dot', function () {
expect(extension('file.js.')).to.equal(undefined);
});

it('treats additional dots as a separate extension', function () {
// Double
expect(extension('file.babel..js')).to.deep.equal(['.babel..js', '..js', '.js']);
expect(extension('file..babel.js')).to.deep.equal(['..babel.js', '.babel.js', '.js']);
// Triple
expect(extension('file.babel...js')).to.deep.equal(['.babel...js', '...js', '..js', '.js']);
expect(extension('file...babel.js')).to.deep.equal(['...babel.js', '..babel.js', '.babel.js', '.js']);
});

it('does not consider a leading dot to be an extension', function () {
expect(extension('.config')).to.equal(undefined);
});
});

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