skip functional tests for doc change

in some cases, we don't need to do
functional testing, like doc change
of the yml files related to Travis
or mergify.This PR skip functional
testing for this kind of changes

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

.travis.yml

@@ -49,6 +49,7 @@ jobs:
 
     - name: cephcsi
       script:
+        - scripts/skip-doc-change.sh || travis_terminate 0;
         - make cephcsi ||  travis_terminate 1;
         - sudo scripts/minikube.sh up || travis_terminate 1;
         # pull docker images to speed up e2e

scripts/skip-doc-change.sh

@@ -0,0 +1,31 @@
+#!/bin/bash -e
+CHANGED_FILES=$(git diff --name-only "$TRAVIS_COMMIT_RANGE")
+
+[[ -z $CHANGED_FILES ]] && exit 1
+
+skip=0
+#files to be skipped
+declare -a FILES=(^docs/ .md$ ^scripts/ LICENSE .travis.yml .mergify.yml .github .gitignore)
+
+function check_file_present() {
+    local file=$1
+    for FILE in "${FILES[@]}"; do
+        if [[ $file =~ $FILE ]]; then
+            if [[ $file =~ minikube.sh ]]; then
+                continue
+            fi
+            return 0
+        fi
+    done
+    return 1
+}
+
+for CHANGED_FILE in $CHANGED_FILES; do
+    if ! check_file_present "$CHANGED_FILE"; then
+        skip=1
+    fi
+done
+if [ $skip -eq 0 ]; then
+    echo "Skipping functional tests"
+    exit 1
+fi