core/build/various: python3 compat, prepare for python2 -> python3

Note 1) we're not supposed to be using #!/usr/bin/env python, see
https://fedoraproject.org/wiki/Packaging:Guidelines?rd=Packaging/Guidelines#Shebang_lines

Note 2) we're also not supposed to be using "!/usr/bin/python,
see https://fedoraproject.org/wiki/Changes/Avoid_usr_bin_python_in_RPM_Build#Quick_Opt-Out

The previous patch (https://review.gluster.org/19767) tried to do too
much in one patch, so it was abandoned.

This patch does two things:
1) minor cleanup of configure(.ac) to explicitly use python2
2) change all the shebang lines to #!/usr/bin/python2 and add them
where they were missing based on warnings emitted during rpmbuild.

In a follow-up patch python2 will eventually be changed to python3.

Before that python2-isms (e.g. print, string.join(), etc.) need to be
converted to python3. Some of those can be rewritten in version agnostic
python. E.g. print statements become print() with "from __future_ import
print_function". The python 2to3 utility will be used for some of those.
Also Aravinda has given guidance in the comments to the first patch for
changes.

updates: #411
Change-Id: I471730962b2526022115a1fc33629fb078b74338
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>

7 files changed, 7 insertions, 7 deletions

diff --git a/tools/gfind_missing_files/gfid_to_path.py b/tools/gfind_missing_files/gfid_to_path.py
index 8362f68b955..c319319e9da 100644
--- a/tools/gfind_missing_files/gfid_to_path.py
+++ b/tools/gfind_missing_files/gfid_to_path.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 
 # Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com/>
 # This file is part of GlusterFS.
diff --git a/tools/glusterfind/S57glusterfind-delete-post.py b/tools/glusterfind/S57glusterfind-delete-post.py
index fb6c222df03..662ef460bec 100755
--- a/tools/glusterfind/S57glusterfind-delete-post.py
+++ b/tools/glusterfind/S57glusterfind-delete-post.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 import os
 import shutil
 from errno import ENOENT
diff --git a/tools/glusterfind/glusterfind.in b/tools/glusterfind/glusterfind.in
index cff8973980a..3af04d46539 100644
--- a/tools/glusterfind/glusterfind.in
+++ b/tools/glusterfind/glusterfind.in
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 
 # Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com/>
 # This file is part of GlusterFS.
diff --git a/tools/glusterfind/src/brickfind.py b/tools/glusterfind/src/brickfind.py
index e914bacd4ab..6b430d3b9d2 100644
--- a/tools/glusterfind/src/brickfind.py
+++ b/tools/glusterfind/src/brickfind.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com/>
diff --git a/tools/glusterfind/src/changelog.py b/tools/glusterfind/src/changelog.py
index 2376af26e72..b124ae7e168 100644
--- a/tools/glusterfind/src/changelog.py
+++ b/tools/glusterfind/src/changelog.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com/>
diff --git a/tools/glusterfind/src/main.py b/tools/glusterfind/src/main.py
index 63de6d06410..3e7a729338c 100644
--- a/tools/glusterfind/src/main.py
+++ b/tools/glusterfind/src/main.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com/>
diff --git a/tools/glusterfind/src/nodeagent.py b/tools/glusterfind/src/nodeagent.py
index 07d82826e0d..e921bc0df43 100644
--- a/tools/glusterfind/src/nodeagent.py
+++ b/tools/glusterfind/src/nodeagent.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com/>