warn against sorting requirements

And do not check for sorted files.

Change-Id: I64ae9191863564e278a35d42ec9cd743a233028e
Closes-Bug: 1365061

requirements.txt

@@ -1,3 +1,8 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
+pbr>=0.6,!=0.7,<1.0
 argparse
 Babel>=1.3
 eventlet>=0.13.0
@@ -12,7 +17,6 @@ oslo.config>=1.4.0.0a3
 oslo.db>=0.2.0  # Apache-2.0
 oslo.messaging>=1.3.0
 PasteDeploy>=1.5.0
-pbr>=0.6,!=0.7,<1.0
 posix_ipc
 pycrypto>=2.6
 python-ceilometerclient>=1.0.6

test-requirements.txt

@@ -1,7 +1,11 @@
-coverage>=3.6
-discover
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
 # Hacking already pins down pep8, pyflakes and flake8
 hacking>=0.8.0,<0.9
+coverage>=3.6
+discover
 lockfile>=0.8
 mock>=1.0
 mox>=0.5.3

tools/requirements_style_check.sh

@@ -1,32 +0,0 @@
-#!/bin/bash
-#
-# Enforce the requirement that dependencies are listed in the input
-# files in alphabetical order.
-
-# FIXME(dhellmann): This doesn't deal with URL requirements very
-# well. We should probably sort those on the egg-name, rather than the
-# full line.
-
-function check_file() {
-    typeset f=$1
-
-    # We don't care about comment lines.
-    grep -v '^#' $f > ${f}.unsorted
-    sort -d -i -f ${f}.unsorted > ${f}.sorted
-    diff -c ${f}.unsorted ${f}.sorted
-    rc=$?
-    rm -f ${f}.sorted ${f}.unsorted
-    return $rc
-}
-
-exit_code=0
-for filename in $@
-do
-    check_file $filename
-    if [ $? -ne 0 ]
-    then
-        echo "Please list requirements in $filename in alphabetical order" 1>&2
-        exit_code=1
-    fi
-done
-exit $exit_code

tox.ini

@@ -25,7 +25,6 @@ commands =
 commands =
     flake8 heat bin/heat-api bin/heat-api-cfn bin/heat-api-cloudwatch bin/heat-engine bin/heat-manage contrib functionaltests
     {toxinidir}/tools/config/check_uptodate.sh
-    {toxinidir}/tools/requirements_style_check.sh requirements.txt test-requirements.txt
     # Check that .po and .pot files are valid:
     bash -c "find heat -type f -regex '.*\.pot?' -print0|xargs -0 -n 1 msgfmt --check-format -o /dev/null"