Commits on Apr 27, 2018

1. Fix default sourceFileName. …

   This deals with a problem mentioned in [babel/babelify#255][0]. I'm not
   super sure about the implications, but it seems this may have been a
   regression from Babel 6.
   
   In babel@6, the default `sourceFileName` was the basename of the input
   file:
   
   ```js
   require('babel-core').transform('var a = 10', {
     filename: __filename,
     sourceMaps: true
   }).map
   // { version: 3,
   //   sources: [ 'index.js' ],
   //   names: [ 'a' ],
   //   mappings: 'AAAA,IAAIA,IAAI,EAAR',
   //   file: 'index.js',
   //   sourcesContent: [ 'var a = 10' ] } }
   ```
   
   Currently however, the full file path is used:
   
   ```js
   require('@babel/core').transformSync('var a = 10', {
     filename: __filename,
     sourceMaps: true
   }).map
   // { version: 3,
   //   sources: [ '/home/goto-bus-stop/Code/babel/repro-babelify-255/index.js' ],
   //   names: [ 'a' ],
   //   mappings: 'AAAA,IAAIA,IAAI,EAAR',
   //   file: '/home/goto-bus-stop/Code/babel/repro-babelify-255/index.js',
   //   sourcesContent: [ 'var a = 10' ] } }
   ```
   
   This patch adds the `path.basename()` call that [Babel 6 used][1] to
   @babel/core's default options, so it's the same as back then.
   
   ```js
   require('../babel/packages/babel-core').transform('var a = 10', {
     filename: __filename,
     sourceMaps: true
   }).map
   // { version: 3,
   //   sources: [ 'index.js' ],
   //   names: [ 'a' ],
   //   mappings: 'AAAA,IAAIA,IAAI,EAAR',
   //   sourcesContent: [ 'var a = 10' ] }
   ```
   
   This is the desired behaviour for browserify at least, as it expects
   relative paths in the source maps and rebases them to a root directory
   when generating the final source map.
   
   [0]: babel/babelify#255
   [1]: https://github.com/babel/babel/blob/6689d2d23cdb607c326ed5a06855bfb84c050c56/packages/babel-core/src/transformation/file/index.js#L163-L172

   

   goto-bus-stop committed Apr 27, 2018
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2. Use cwd-relative path for sourceFileName.

   

   goto-bus-stop committed Apr 27, 2018
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   dd6e195 View commit details

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3. Revert sourceMap file property change.

   

   goto-bus-stop committed Apr 27, 2018
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   7546ac7 View commit details

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4. fixup! Revert sourceMap file property change.

   

   goto-bus-stop committed Apr 27, 2018
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   2182a03 View commit details

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5. Fix whitespace change from merge conflict

   

   goto-bus-stop committed Apr 27, 2018
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   9412a4b View commit details

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6. Revert to using basename in source map outputs.

   

   goto-bus-stop committed Apr 27, 2018
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