Reviewed-by: Sean Brogan <sean.bro...@microsoft.com>

On 11/23/2021 9:31 AM, Michael D Kinney wrote:
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3746

Use --output option in git diff command to remove code diffs
from build log on stdout when LicenseCheck plugin is run.
Instead, create a temp directory for the diff output file and
remove the temp directory after the diff output is processed.

Cc: Sean Brogan <sean.bro...@microsoft.com>
Cc: Bret Barkelew <bret.barke...@microsoft.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Michael Kubacki <michael.kuba...@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kin...@intel.com>
---
  .pytool/Plugin/LicenseCheck/LicenseCheck.py | 20 ++++++++++++++------
  1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/.pytool/Plugin/LicenseCheck/LicenseCheck.py 
b/.pytool/Plugin/LicenseCheck/LicenseCheck.py
index 5733f7bf4ec0..7b998daf6f6b 100644
--- a/.pytool/Plugin/LicenseCheck/LicenseCheck.py
+++ b/.pytool/Plugin/LicenseCheck/LicenseCheck.py
@@ -5,6 +5,7 @@
  ##
import os
+import shutil
  import logging
  import re
  from io import StringIO
@@ -61,12 +62,19 @@ class LicenseCheck(ICiBuildPlugin):
      #   - Junit Logger
      #   - output_stream the StringIO output stream from this plugin via 
logging
      def RunBuildPlugin(self, packagename, Edk2pathObj, pkgconfig, 
environment, PLM, PLMHelper, tc, output_stream=None):
-        return_buffer = StringIO()
-        params = "diff --unified=0 origin/master HEAD"
-        RunCmd("git", params, outstream=return_buffer)
-        p = return_buffer.getvalue().strip()
-        patch = p.split("\n")
-        return_buffer.close()
+        # Create temp directory
+        temp_path = os.path.join(Edk2pathObj.WorkspacePath, 'Build', 
'.pytool', 'Plugin', 'LicenseCheck')
+        if not os.path.exists(temp_path):
+            os.makedirs(temp_path)
+        # Output file to use for git diff operations
+        temp_diff_output = os.path.join (temp_path, 'diff.txt')
+        params = "diff --output={} --unified=0 origin/master 
HEAD".format(temp_diff_output)
+        RunCmd("git", params)
+        with open(temp_diff_output) as file:
+            patch = file.read().strip().split("\n")
+        # Delete temp directory
+        if os.path.exists(temp_path):
+            shutil.rmtree(temp_path)
ignore_files = []
          if "IgnoreFiles" in pkgconfig:



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