lib/prservice: Improve lock handling robustness

It is possible we could crash holding a lock whilst parsing in this code.
Switch to use utils.fileslocked() in the with expression to avoid this.

This may be causing some of our strange intermittent failures in PRServ
tests.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 4e59db15e5df2cc3d0ae042454812a2d54cef77b)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

diff --git a/meta/lib/oe/prservice.py b/meta/lib/oe/prservice.py
index 2f2a0c128af5daf66b0c7e00dad905bbd25579f9..c41242c878d906058d9099cd38e160b30351bf8b 100644 (file)
--- a/meta/lib/oe/prservice.py
+++ b/meta/lib/oe/prservice.py
@@ -78,8 +78,7 @@ def prserv_export_tofile(d, metainfo, datainfo, lockdown, nomax=False):
     bb.utils.mkdirhier(d.getVar('PRSERV_DUMPDIR'))
     df = d.getVar('PRSERV_DUMPFILE')
     #write data
-    lf = bb.utils.lockfile("%s.lock" % df)
-    with open(df, "a") as f:
+    with open(df, "a") as f, bb.utils.fileslocked(["%s.lock" % df]) as locks:
         if metainfo:
             #dump column info
             f.write("#PR_core_ver = \"%s\"\n\n" % metainfo['core_ver']);
@@ -113,7 +112,6 @@ def prserv_export_tofile(d, metainfo, datainfo, lockdown, nomax=False):
             if not nomax:
                 for i in idx:
                     f.write("PRAUTO_%s_%s = \"%s\"\n" % (str(datainfo[idx[i]]['version']),str(datainfo[idx[i]]['pkgarch']),str(datainfo[idx[i]]['value'])))
-    bb.utils.unlockfile(lf)
 
 def prserv_check_avail(d):
     host_params = list([_f for _f in (d.getVar("PRSERV_HOST") or '').split(':') if _f])