[PATCH v1 1/1] BaseTools: Explicitly close files after readlines

[Michael Johnson <michael.johnson@intel.com>]

From: mjohn4 <michael.johnson@intel.com>

Rework some file open().readlines to open, readlines, close.
This prevents excessive file handles being open at the same time,
which may be a problem with alternative python environments.

Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael Johnson <michael.johnson@intel.com>
---
 BaseTools/Source/Python/AutoGen/InfSectionParser.py |  4 +++-
 BaseTools/Source/Python/Workspace/MetaFileParser.py | 16 ++++++++++++----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/InfSectionParser.py b/BaseTools/Source/Python/AutoGen/InfSectionParser.py
index d985089738..b186984101 100644
--- a/BaseTools/Source/Python/AutoGen/InfSectionParser.py
+++ b/BaseTools/Source/Python/AutoGen/InfSectionParser.py
@@ -34,7 +34,9 @@ class InfSectionParser():
         SectionData = []
 
         try:
-            FileLinesList = open(self._FilePath, "r", 0).readlines()
+            File = open(self._FilePath, "r", 0)
+            FileLinesList = File.readlines()
+            File.close()
         except BaseException:
             EdkLogger.error("build", AUTOGEN_ERROR, 'File %s is opened failed.' % self._FilePath)
 
diff --git a/BaseTools/Source/Python/Workspace/MetaFileParser.py b/BaseTools/Source/Python/Workspace/MetaFileParser.py
index 804a4aa5cb..9a795315d1 100644
--- a/BaseTools/Source/Python/Workspace/MetaFileParser.py
+++ b/BaseTools/Source/Python/Workspace/MetaFileParser.py
@@ -537,7 +537,9 @@ class InfParser(MetaFileParser):
         NmakeLine = ''
         Content = ''
         try:
-            Content = open(str(self.MetaFile), 'r').readlines()
+            File = open(str(self.MetaFile), 'r')
+            Content = File.readlines()
+            File.close ()
         except:
             EdkLogger.error("Parser", FILE_READ_FAILURE, ExtraData=self.MetaFile)
 
@@ -917,7 +919,9 @@ class DscParser(MetaFileParser):
     def Start(self):
         Content = ''
         try:
-            Content = open(str(self.MetaFile), 'r').readlines()
+            File = open(str(self.MetaFile), 'r')
+            Content = File.readlines()
+            File.close()
         except:
             EdkLogger.error("Parser", FILE_READ_FAILURE, ExtraData=self.MetaFile)
 
@@ -1429,7 +1433,9 @@ class DscParser(MetaFileParser):
             self._SubsectionType = MODEL_UNKNOWN
 
     def __RetrievePcdValue(self):
-        Content = open(str(self.MetaFile), 'r').readlines()
+        File = open(str(self.MetaFile), 'r')
+        Content = File.readlines()
+        File.close()
         GlobalData.gPlatformOtherPcds['DSCFILE'] = str(self.MetaFile)
         for PcdType in (MODEL_PCD_PATCHABLE_IN_MODULE, MODEL_PCD_DYNAMIC_DEFAULT, MODEL_PCD_DYNAMIC_HII,
                         MODEL_PCD_DYNAMIC_VPD, MODEL_PCD_DYNAMIC_EX_DEFAULT, MODEL_PCD_DYNAMIC_EX_HII,
@@ -1727,7 +1733,9 @@ class DecParser(MetaFileParser):
     def Start(self):
         Content = ''
         try:
-            Content = open(str(self.MetaFile), 'r').readlines()
+            File = open(str(self.MetaFile), 'r')
+            Content = File.readlines()
+            File.close()
         except:
             EdkLogger.error("Parser", FILE_READ_FAILURE, ExtraData=self.MetaFile)
 
-- 
2.18.0.windows.1