[OE-core] [PATCH 3/3] oeqa/utils/ftools: Checks before appending/reading files

[leonardo.sandoval.gonzalez at linux.intel.com]

From: Leonardo Sandoval <leonardo.sandoval.gonzalez at linux.intel.com>

Before trying to append/read a file, check if file exists.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez at linux.intel.com>
---
 meta/lib/oeqa/utils/ftools.py | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/meta/lib/oeqa/utils/ftools.py b/meta/lib/oeqa/utils/ftools.py
index 64ebe3d..70a55b8 100644
--- a/meta/lib/oeqa/utils/ftools.py
+++ b/meta/lib/oeqa/utils/ftools.py
@@ -8,20 +8,24 @@ def write_file(path, data):
 
 def append_file(path, data):
     wdata = data.rstrip() + "\n"
-    with open(path, "a") as f:
+    if os.path.isfile(path):
+        with open(path, "a") as f:
             f.write(wdata)
 
 def read_file(path):
     data = None
-    with open(path) as f:
-        data = f.read()
+    if os.path.isfile(path):
+        with open(path) as f:
+            data = f.read()
     return data
 
 def remove_from_file(path, data):
-    lines = read_file(path).splitlines()
-    rmdata = data.strip().splitlines()
-    for l in rmdata:
-        for c in range(0, lines.count(l)):
-            i = lines.index(l)
-            del(lines[i])
-    write_file(path, "\n".join(lines))
+    rawdata = read_file(path)
+    if rawdata:
+        lines = rawdata.splitlines()
+        rmdata = data.strip().splitlines()
+        for l in rmdata:
+            for c in range(0, lines.count(l)):
+                i = lines.index(l)
+                del(lines[i])
+        write_file(path, "\n".join(lines))
-- 
1.8.4.5