Allow invalid json in already-installed packages

1 files changed, 19 insertions, 5 deletions

diff --git a/lib/utils/read-json.js b/lib/utils/read-json.js
index cd6872cef..7800d2035 100644
--- a/lib/utils/read-json.js
+++ b/lib/utils/read-json.js
@@ -70,14 +70,28 @@ function processJsonString (opts, cb) { return function (er, jsonString) {
   try {
     json = JSON.parse(jsonString)
   } catch (ex) {
-    var e = new Error(
-      "Failed to parse json\n"+ex.message)
-    e.errno = npm.EJSONPARSE
-    if (cb) return cb(e)
-    throw e
+    if (opts.file && opts.file.indexOf(npm.dir) === 0) {
+      try {
+        json = require("vm").runInNewContext("(\n"+jsonString+"\n)")
+        log.error(ex, "parse error "+opts.file)
+      } catch (ex2) {
+        return jsonParseFail(ex, cb)
+      }
+    } else {
+      return jsonParseFail(ex, cb)
+    }
   }
   return processObject(opts, cb)(er, json)
 }}
+
+function jsonParseFail (ex, cb) {
+  var e = new Error(
+    "Failed to parse json\n"+ex.message)
+  e.errno = npm.EJSONPARSE
+  if (cb) return cb(e)
+  throw e
+}
+
 function processObject (opts, cb) { return function (er, json) {
 
   // slashes would be a security risk.