gam oauth refresh to force refresh

.travis.yml

@@ -141,6 +141,8 @@ script:
 - if [ "$e2e" = true ]; then openssl aes-256-cbc -K $encrypted_ab10ec38326e_key -iv $encrypted_ab10ec38326e_iv -in travis/oauth2service.json.enc -out $gampath/oauth2service.json -d; fi
 - if [ "$e2e" = true ]; then cat travis/cfg_template.json | python travis/svars-write.py &> /dev/null; fi
 - if [ "$e2e" = true ]; then $gam info domain; fi
+- if [ "$e2e" = true ]; then $gam oauth info; fi
+- if [ "$e2e" = true ]; then $gam oauth refresh; fi
 - if [ "$e2e" = true ]; then $gam info user; fi
 - if [ "$e2e" = true ]; then export tstamp=$(date +%s%3N);
   export newbase=travis-test-$jid-$tstamp;

src/gam.py

@@ -1220,10 +1220,10 @@ def getOauth2TxtStorageCredentials():
   GC_Values[GC_DECODED_ID_TOKEN] = oauth_data.get('decoded_id_token', '')
   return creds
 
-def getValidOauth2TxtCredentials():
+def getValidOauth2TxtCredentials(force_refresh=False):
   """Gets OAuth2 credentials which are guaranteed to be fresh and valid."""
   credentials = getOauth2TxtStorageCredentials()
-  if credentials and credentials.expired:
+  if (credentials and credentials.expired) or force_refresh:
     try:
       credentials.refresh(google_auth_httplib2.Request(httplib2.Http()))
       writeCredentials(credentials)
@@ -13973,6 +13973,12 @@ def ProcessGAMCommand(args):
         OAuthInfo()
       elif argument in ['delete', 'revoke']:
         doDeleteOAuth()
+      elif argument in ['refresh']:
+        creds = getValidOauth2TxtCredentials(force_refresh=True)
+        if not creds:
+          systemErrorExit(5, 'Credential refresh failed')
+        else:
+          print('Credenials refreshed')
       else:
         systemErrorExit(2, '%s is not a valid argument for "gam oauth"' % argument)
       sys.exit(0)