1 files changed, 176 insertions, 0 deletions
diff --git a/node_modules/get-source/get-source.js b/node_modules/get-source/get-source.js
new file mode 100644
index 0000000..5f2d2d7
--- /dev/null
+++ b/node_modules/get-source/get-source.js
@@ -0,0 +1,176 @@
+"use strict";
+
+/*  ------------------------------------------------------------------------ */
+
+const { assign }        = Object,
+      isBrowser         = (typeof window !== 'undefined') && (window.window === window) && window.navigator,
+      SourceMapConsumer = require ('source-map').SourceMapConsumer,
+      SyncPromise       = require ('./impl/SyncPromise'),
+      path              = require ('./impl/path'),
+      dataURIToBuffer   = require ('data-uri-to-buffer'),
+      nodeRequire       = isBrowser ? null : module.require
+
+/*  ------------------------------------------------------------------------ */
+
+const memoize = f => {
+
+    const m = x => (x in m.cache) ? m.cache[x] : (m.cache[x] = f(x))
+    m.forgetEverything = () => { m.cache = Object.create (null) }
+    m.cache = Object.create (null)
+
+    return m
+}
+
+function impl (fetchFile, sync) {
+    
+    const PromiseImpl = sync ? SyncPromise : Promise 
+    const SourceFileMemoized = memoize (path => SourceFile (path, fetchFile (path)))
+
+    function SourceFile (srcPath, text) {
+        if (text === undefined) return SourceFileMemoized (path.resolve (srcPath))
+
+        return PromiseImpl.resolve (text).then (text => {
+
+            let file
+            let lines
+            let resolver
+            let _resolve = loc => (resolver = resolver || SourceMapResolverFromFetchedFile (file)) (loc)
+
+            return (file = {
+                path: srcPath,
+                text,
+                get lines () { return lines = (lines || text.split ('\n')) },
+                resolve (loc) {
+                    const result = _resolve (loc)
+                    if (sync) {
+                        try { return SyncPromise.valueFrom (result) }
+                        catch (e) { return assign ({}, loc, { error: e }) }
+                    } else {
+                        return Promise.resolve (result)
+                    }
+                },
+                _resolve,
+            })
+        })
+    }
+
+    function SourceMapResolverFromFetchedFile (file) {
+
+    /*  Extract the last sourceMap occurence (TODO: support multiple sourcemaps)   */
+
+        const re = /\u0023 sourceMappingURL=(.+)\n?/g
+        let lastMatch = undefined
+
+        while (true) {
+            const match = re.exec (file.text)
+            if (match) lastMatch = match
+            else break
+        }
+
+        const url = lastMatch && lastMatch[1]
+
+        const defaultResolver = loc => assign ({}, loc, {
+            sourceFile:  file,
+            sourceLine: (file.lines[loc.line - 1] || '')
+        })
+
+        return url ? SourceMapResolver (file.path, url, defaultResolver)
+                   : defaultResolver
+    }
+
+    function SourceMapResolver (originalFilePath, sourceMapPath, fallbackResolve) {
+    
+        const srcFile = sourceMapPath.startsWith ('data:')
+                            ? SourceFile (originalFilePath, dataURIToBuffer (sourceMapPath).toString ())
+                            : SourceFile (path.relativeToFile (originalFilePath, sourceMapPath))
+
+        const parsedMap = srcFile.then (f => SourceMapConsumer (JSON.parse (f.text)))
+        
+        const sourceFor = memoize (function sourceFor (filePath) {
+            return srcFile.then (f => {
+                const fullPath = path.relativeToFile (f.path, filePath)
+                return parsedMap.then (x => SourceFile (
+                                                fullPath,
+                                                x.sourceContentFor (filePath, true /* return null on missing */) || undefined))
+            })
+        })
+    
+        return loc => parsedMap.then (x => {
+                        const originalLoc = x.originalPositionFor (loc)
+                        return originalLoc.source ? sourceFor (originalLoc.source).then (x =>
+                                                        x._resolve (assign ({}, loc, {
+                                                            line:   originalLoc.line,
+                                                            column: originalLoc.column + 1,
+                                                            name:   originalLoc.name
+                                                        }))
+                                                    )
+                                                  : fallbackResolve (loc)
+                    }).catch (e =>
+                        assign (fallbackResolve (loc), { sourceMapError: e }))
+    }
+
+    return assign (function getSource (path) {
+                        const file = SourceFile (path)
+                        if (sync) {
+                            try { return SyncPromise.valueFrom (file) }
+                            catch (e) {
+                                const noFile = {
+                                    path,
+                                    text: '',
+                                    lines: [],
+                                    error: e,
+                                    resolve (loc) {
+                                        return assign ({}, loc, { error: e, sourceLine: '', sourceFile: noFile })
+                                    }
+                                }
+                                return noFile
+                            }
+                        }
+                        return file
+                    }, {
+                        resetCache: () => SourceFileMemoized.forgetEverything (),
+                        getCache:   () => SourceFileMemoized.cache
+                    })
+}
+
+/*  ------------------------------------------------------------------------ */
+
+module.exports = impl (function fetchFileSync (path) {
+                        return new SyncPromise (resolve => {
+                            if (isBrowser) {
+                                let xhr = new XMLHttpRequest ()
+                                xhr.open ('GET', path, false /* SYNCHRONOUS XHR FTW :) */)
+                                xhr.send (null)
+                                resolve (xhr.responseText)
+                            } else {
+                                resolve (nodeRequire ('fs').readFileSync (path, { encoding: 'utf8' }))
+                            }
+                        })
+                    }, true)
+
+/*  ------------------------------------------------------------------------ */
+
+module.exports.async = impl (function fetchFileAsync (path) {
+                        return new Promise ((resolve, reject) => {
+                            if (isBrowser) {
+                                let xhr = new XMLHttpRequest ()
+                                xhr.open ('GET', path)
+                                xhr.onreadystatechange = event => {
+                                    if (xhr.readyState === 4) {
+                                        if (xhr.status === 200) {
+                                            resolve (xhr.responseText)
+                                        } else {
+                                            reject (new Error (xhr.statusText))
+                                        }
+                                    }
+                                }
+                                xhr.send (null)
+                            } else {
+                                nodeRequire ('fs').readFile (path, { encoding: 'utf8' }, (e, x) => {
+                                    e ? reject (e) : resolve (x)
+                                })
+                            }
+                        })
+                    })
+
+/*  ------------------------------------------------------------------------ */