refactor(hook-console-log): pass line offset instead of hardcoding 1

lib/hook-console-log.js

@@ -7,13 +7,15 @@ const slice = Array.prototype.slice
 
 const originalLog = console.log
 
-function hookConsoleLog (filePath) {
+function hookConsoleLog (filePath, opts) {
+  opts = opts || {}
+
   console.log = function () {
     const site = callsiteForFile(filePath)
 
     originalLog('\n$\n' + JSON.stringify({
       args: slice.call(arguments),
-      line: site.line - 1,
+      line: site.line - opts.lineOffset,
       column: site.column,
     }))
   }

lib/stdout-to-comments.js

@@ -8,7 +8,6 @@ const spawn = require('cross-spawn-async')
 const path = require('path')
 const SourceMapConsumer = require('source-map').SourceMapConsumer
 const normalizePath = require('normalize-path')
-const hookPath = normalizePath(path.resolve(__dirname, './hook-console-log'))
 const position = require('file-position')
 const normalizeNewline = require('normalize-newline')
 const consoleStringify = require('./console-stringify')
@@ -139,9 +138,19 @@ function outputSemanticPosition (ast, pos) {
   return node.node.loc.end.line
 }
 
+const hookPath = normalizePath(path.resolve(__dirname, './hook-console-log'))
+
 function addHook (opts) {
-  if (!opts.code.match(/['"]use strict['"]/)) {
-    return `require('${hookPath}')('${opts.filePath}');\n` + opts.code
+  return useStrictToBeginning(
+    `require('${hookPath}')('${opts.filePath}', {lineOffset: 1});\n${opts.code}`
+  )
+}
+
+// this is needed because the 'use strict' statement has to be before any
+// other statement in the file
+function useStrictToBeginning (code) {
+  if (!code.match(/['"]use strict['"]/)) {
+    return code
   }
-  return `'use strict';require('${hookPath}')('${opts.filePath}');\n` + opts.code
+  return `'use strict';${code}`
 }