Add support to lint the install commands in Dockerfiles

Change-Id: Icb47ba8b13b13889e28bb285321f11344400edc2
Closes-Bug:#1582618

tools/pre-commit-hook

@@ -37,8 +37,8 @@ echo "=== json checks ==="
 
 ${TOPLEVEL}/tools/validate-all-json.sh || RES=1
 
-echo "=== maintainer checks ==="
+echo "=== dockerfile checks ==="
 
-${TOPLEVEL}/tools/validate-all-maintainer.sh || RES=1
+${TOPLEVEL}/tools/validate-all-dockerfiles || RES=1
 
 exit $RES

tools/validate-all-dockerfiles.sh

@@ -5,3 +5,7 @@ cd "$(dirname "$REAL_PATH")/.."
 
 find docker -name Dockerfile.j2 -print0 |
     xargs -0 tools/validate-maintainer.sh || exit 1
+
+find docker -name Dockerfile.j2 -print0 |
+    xargs -0 tools/validate-install-command.sh || exit 1
+

tools/validate-install-command.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+RES=0
+
+for dockerfile in "$@"; do
+    if grep "apt-get install\|yum install" "$dockerfile"; then
+        echo "ERROR: $dockerfile has incorrectly formatted install command Should be in the form 'apt-get|yum -y install ...'" >&2
+        RES=1
+    fi
+done
+
+exit $RES

tox.ini

@@ -23,7 +23,7 @@ commands =
   flake8 {posargs}
   {toxinidir}/tools/validate-all-json.sh
   {toxinidir}/tools/validate-all-yaml.sh
-  {toxinidir}/tools/validate-all-maintainer.sh
+  {toxinidir}/tools/validate-all-dockerfiles.sh
 
 [testenv:bandit]
 commands = bandit -r ansible/library dev docker kolla tests tools