bitbake: fetch2/npm: fix npw view parsing

Fixes [YOCTO #13344]

When parsing manually the 'npm view --json' ouput, an extra closing
brackets in a JSON string can leads the fetcher to fail with a
JSONDecodeError exception.

This commit use the JSON parser to extract:
 - The last object in the returned array if there are multiple results.
 - The returned object if there is only one result.

Signed-off-by: Jean-Marie LEMETAYER <jean-marie.lemetayer@savoirfairelinux.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 14 deletions

diff --git a/lib/bb/fetch2/npm.py b/lib/bb/fetch2/npm.py
index f08bdee73..4427b1bb8 100644
--- a/lib/bb/fetch2/npm.py
+++ b/lib/bb/fetch2/npm.py
@@ -151,20 +151,11 @@ class Npm(FetchMethod):
         Parse the output of npm view --json; the last JSON result
         is assumed to be the one that we're interested in.
         '''
-        pdata = None
-        outdeps = {}
-        datalines = []
-        bracelevel = 0
-        for line in output.splitlines():
-            if bracelevel:
-                datalines.append(line)
-            elif '{' in line:
-                datalines = []
-                datalines.append(line)
-            bracelevel = bracelevel + line.count('{') - line.count('}')
-        if datalines:
-            pdata = json.loads('\n'.join(datalines))
-        return pdata
+        pdata = json.loads(output);
+        try:
+            return pdata[-1]
+        except:
+            return pdata
 
     def _getdependencies(self, pkg, data, version, d, ud, optional=False, fetchedlist=None):
         if fetchedlist is None: