Revert BaseTools: PYTHON3 migration

This reverts commit 6693f359b3c213513c5096a06c6f67244a44dc52..
678f851312.

Python3 migration is the fundamental change. It requires every developer
to install Python3. Before this migration, the well communication and wide
verification must be done. But now, most people is not aware of this change,
and not try it. So, Python3 migration is reverted and be moved to edk2-staging
Python3 branch for the edk2 user evaluation.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>

BaseTools/BinWrappers/PosixLike/BPDG

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/Ecc

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/GenDepex

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/GenFds

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/GenPatchPcdTable

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/GenerateCapsule

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/PatchPcdValue

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/Pkcs7Sign

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/Rsa2048Sha256GenerateKeys

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/Rsa2048Sha256Sign

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/TargetTool

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/Trim

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/UPT

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/PosixLike/build

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a PYTHON3 command is available, use it in preference to python
-if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=$PYTHON3
+# If a python2 command is available, use it in preference to python
+if command -v python2 >/dev/null 2>&1; then
+    python_exe=python2
 fi
 
 full_cmd=${BASH_SOURCE:-$0} # see http://mywiki.wooledge.org/BashFAQ/028 for a discussion of why $0 is not a good choice here

BaseTools/BinWrappers/WindowsLike/BPDG.bat

@@ -1,4 +1,4 @@
 @setlocal
 @set ToolName=%~n0%
 @set PYTHONPATH=%PYTHONPATH%;%BASE_TOOLS_PATH%\Source\Python
-@%PYTHON3% -m %ToolName%.%ToolName% %*
+@%PYTHON_HOME%\python.exe -m %ToolName%.%ToolName% %*

BaseTools/BinWrappers/WindowsLike/Ecc.bat

@@ -1,4 +1,4 @@
 @setlocal
 @set ToolName=%~n0%
 @set PYTHONPATH=%PYTHONPATH%;%BASE_TOOLS_PATH%\Source\Python
-@%PYTHON3% -m %ToolName%.EccMain %*
+@%PYTHON_HOME%\python.exe -m %ToolName%.EccMain %*

BaseTools/BinWrappers/WindowsLike/GenDepex.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\AutoGen\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\AutoGen\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/GenFds.bat

@@ -1,4 +1,4 @@
 @setlocal
 @set ToolName=%~n0%
 @set PYTHONPATH=%PYTHONPATH%;%BASE_TOOLS_PATH%\Source\Python
-@%PYTHON3% -m %ToolName%.%ToolName% %*
+@%PYTHON_HOME%\python.exe -m %ToolName%.%ToolName% %*

BaseTools/BinWrappers/WindowsLike/GenPatchPcdTable.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/GenerateCapsule.bat

@@ -1 +1 @@
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\Capsule\GenerateCapsule.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\Capsule\GenerateCapsule.py %*

BaseTools/BinWrappers/WindowsLike/PatchPcdValue.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/Pkcs7Sign.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/Rsa2048Sha256GenerateKeys.bat

@@ -1 +1 @@
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\Rsa2048Sha256Sign\Rsa2048Sha256GenerateKeys.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\Rsa2048Sha256Sign\Rsa2048Sha256GenerateKeys.py %*

BaseTools/BinWrappers/WindowsLike/Rsa2048Sha256Sign.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/TargetTool.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/Trim.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/UPT.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*

BaseTools/BinWrappers/WindowsLike/build.bat

@@ -1,3 +1,3 @@
 @setlocal
 @set ToolName=%~n0%
-@%PYTHON3% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*
+@%PYTHON_HOME%\python.exe %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %*