Add static check tools

Added md check to check .md style
Add yamllint to check yaml style
Moved gometalinter to scripts folder

Signed-off-by: Madhu Rajanna <mrajanna@redhat.com>

scripts/lint-text.sh

@@ -0,0 +1,49 @@
+#! /bin/bash
+# vim: set ts=4 sw=4 et :
+
+# Usage: pre-commit.sh [--require-all]
+#   --require-all  Fail instead of warn if a checker is not found
+
+set -e
+
+# Run checks from root of the repo
+scriptdir="$(dirname "$(realpath "$0")")"
+cd "$scriptdir/.."
+
+# run_check <file_regex> <checker_exe> [optional args to checker...]
+function run_check() {
+    regex="$1"
+    shift
+    exe="$1"
+    shift
+
+    if [ -x "$(command -v "$exe")" ]; then
+        find . -path ./vendor -prune -o -regextype egrep -iregex "$regex" -print0 |
+            xargs -0rt -n1 "$exe" "$@"
+    elif [ "$all_required" -eq 0 ]; then
+        echo "Warning: $exe not found... skipping some tests."
+    else
+        echo "FAILED: All checks required, but $exe not found!"
+        exit 1
+    fi
+}
+
+all_required=0
+if [ "x$1" == "x--require-all" ]; then
+    all_required=1
+fi
+
+# markdownlint: https://github.com/markdownlint/markdownlint
+# https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md
+# Install via: gem install mdl
+run_check '.*\.md' mdl --style scripts/mdl-style.rb
+
+# Install via: dnf install shellcheck
+run_check '.*\.(ba)?sh' shellcheck
+run_check '.*\.(ba)?sh' bash -n
+
+# Install via: pip install yamllint
+# disable yamlint chekck for helm chats
+run_check '.*\.ya?ml' yamllint -s -d "{extends: default, rules: {line-length: {allow-non-breakable-inline-mappings: true}},ignore: deploy/rbd/helm/templates/*.yaml}"
+
+echo "ALL OK."