check-scripts.sh: added script to check linting and formatting

Ticket: ENT-12601
Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>

Author: larsewi

user-scripts/check-scripts.sh

@@ -0,0 +1,40 @@
+#!/bin/bash -e
+
+#
+# Interactively lint & format shell scripts in the build-scripts directory.
+#
+# Dependencies:
+# * shfmt
+# * shellcheck
+#
+# This script takes no arguments can be executed from anywhere, e.g.:
+# $ ./user-scripts/check-scripts.sh
+#
+
+BUILD_SCRIPTS="$(dirname "$0")"/../build-scripts
+
+grep -Erl '^(#!/(bin|usr/bin)/(env )?(sh|bash))' "$BUILD_SCRIPTS" | sort | while read -r filepath; do
+    filename=$(basename "$filepath")
+
+    if ! shfmt --diff --indent=4 "$filepath"; then
+        echo
+        echo "File '$filename' requires formatting."
+        read -r -p "Do you wish to format '$filename'? [y/N] " answer </dev/tty
+        case $answer in
+        [yY] | [yY][eE][sS])
+            echo "Formatting file '$filename'..."
+            shfmt --write --indent=4 "$filepath"
+            ;;
+        *)
+            echo "Skipping formatting of file '$filename'..."
+            ;;
+        esac
+    fi
+
+    if ! shellcheck --external-sources --source-path="$BUILD_SCRIPTS" "$filepath"; then
+        echo
+        echo "File '$filename' requires manual intervention."
+        read -n 1 -s -r -p "Press any key to continue..." </dev/tty
+        echo
+    fi
+done