BaseTools: Use PYTHON3 variable instead of PYTHON_HOME

Use PYTHON3 variable instead of PYTHON_HOME path

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yunhua Feng <yunhuax.feng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Bin/CYGWIN_NT-5.1-i686/Ecc

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a python2 command is available, use it in preference to python
+# If a $PYTHON3 command is available, use it in preference to python
-if command -v python2 >/dev/null 2>&1; then
+if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=python2
+    python_exe=$PYTHON3
 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/Bin/CYGWIN_NT-5.1-i686/GenDepex

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a python2 command is available, use it in preference to python
+# If a $PYTHON3 command is available, use it in preference to python
-if command -v python2 >/dev/null 2>&1; then
+if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=python2
+    python_exe=$PYTHON3
 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/Bin/CYGWIN_NT-5.1-i686/GenFds

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a python2 command is available, use it in preference to python
+# If a $PYTHON3 command is available, use it in preference to python
-if command -v python2 >/dev/null 2>&1; then
+if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=python2
+    python_exe=$PYTHON3
 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/Bin/CYGWIN_NT-5.1-i686/TargetTool

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a python2 command is available, use it in preference to python
+# If a $PYTHON3 command is available, use it in preference to python
-if command -v python2 >/dev/null 2>&1; then
+if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=python2
+    python_exe=$PYTHON3
 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/Bin/CYGWIN_NT-5.1-i686/Trim

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a python2 command is available, use it in preference to python
+# If a $PYTHON3 command is available, use it in preference to python
-if command -v python2 >/dev/null 2>&1; then
+if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=python2
+    python_exe=$PYTHON3
 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/Bin/CYGWIN_NT-5.1-i686/build

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 #python `dirname $0`/RunToolFromSource.py `basename $0` $*
 
-# If a python2 command is available, use it in preference to python
+# If a $PYTHON3 command is available, use it in preference to python
-if command -v python2 >/dev/null 2>&1; then
+if command -v $PYTHON3 >/dev/null 2>&1; then
-    python_exe=python2
+    python_exe=$PYTHON3
 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