add modifyOutputPath method (#25)

Author: jescalan

README.md

@@ -38,6 +38,7 @@ With it initialized, you can use any of the following functions:
 - `util.isFileIgnored(file)` - given a path to a file in a spike project, returns a boolean for whether the file is ignored or not.
 - `util.runAll(compiler, cb)` - run the given function when webpack's compiler initializes, bound to both the `run` and `run-watch` events.
 - `util.pathsToRegex(paths)` - given an array of file paths, builds a regex that will match only those paths
+- `util.modifyOutputPath(file, outPath)` - Given an absolute or relative (to the project root) path to a file that's being processed by spike, changes the output path to absolute or relative (recommended) path provided. Recommended to use in the `emit` plugin stage.
 
 And some static methods:
 - `SpikeUtils.filePathFromLoader(loaderContext)` - pass `this` inside a loader and it will return a file object with the absolute and relative paths to the current file being processed.

lib/index.js

@@ -53,6 +53,19 @@ module.exports = class SpikeUtils {
     return file
   }
 
+  /**
+   * Given a source file path and a desired output path, sets spike to write
+   * the given file to the specified output path
+   * @param {String} f - path to the source file, relative or absolute
+   * @param {String} outPath - desired output path
+   */
+  modifyOutputPath (f, outPath) {
+    const match = this.conf.spike.files.process.find((x) => {
+      return x.path === new File(this.conf.context, f).absolute
+    })
+    match.outPath = new File(this.conf.context, outPath).absolute
+  }
+
   /**
    * Given a file's output path, returns the path to the source file.
    * @param {String} f - path to an output file, relative or absolute

package.json

@@ -23,7 +23,7 @@
     "coveralls": "2.x",
     "nyc": "^10.0.0",
     "source-loader": "^0.2.0",
-    "spike-core": "^0.13.0",
+    "spike-core": "^0.13.1",
     "standard": "^8.0.0"
   },
   "engines": {

test/fixtures/basic/views/changepath.html

@@ -0,0 +1 @@
+<p>change my path!</p>

test/index.js

@@ -63,6 +63,7 @@ test.cb('EVERYTHING WORKS', (t) => {
     } catch (err) {
       t.truthy(err.code === 'ENOENT')
     }
+    fs.accessSync(path.join(fixturePath, 'public/changed.html'))
     t.end()
   })
 

test/plugin.js

@@ -29,6 +29,11 @@ module.exports = class TestPlugin extends EventEmitter {
         done()
       })
     })
+
+    compiler.plugin('emit', (compilation, done) => {
+      this.util.modifyOutputPath('views/changepath.html', 'views/changed.html')
+      done()
+    })
   }
 
   run (compilation, done) {