feat: allow disabling pushd with --no-cd

Author: pdecat

README.md

@@ -38,6 +38,7 @@ repos:
     hooks:
       - id: packer_fmt
       - id: packer_validate
+        args: [--no-cd] # Optionally disable changing working directory
 ```
 
 ## Contributing ##

hooks/packer_validate.sh

@@ -22,10 +22,18 @@ util::get_unique_directory_paths "${FILES[@]}"
 error=0
 
 for path in "${UNIQUE_PATHS[@]}"; do
-  pushd "$path" > /dev/null
+  if [[ $NO_CD -eq 1 ]]; then
+    packer init -- "$path" > /dev/null
+    packer validate "${ARGS[@]}" -- "$path"
+    lerror=$?
+  else
+    pushd "$path" > /dev/null
+    packer init . > /dev/null
+    packer validate "${ARGS[@]}" .
+    lerror=$?
+  fi
 
-  packer init . > /dev/null
-  if ! packer validate "${ARGS[@]}" .; then
+  if [[ $lerror -ne 0 ]]; then
     error=1
     echo
     echo "Failed path: $path"

lib/util.sh

@@ -9,14 +9,20 @@ set -o pipefail
 # Globals:
 #   ARGS
 #   FILES
+#   NO_CD
 #######################################
 function util::parse_cmdline() {
   # Global variable arrays
   ARGS=()
   FILES=()
+  export NO_CD=0
 
   while (("$#")); do
     case "$1" in
+      --no-cd)
+        NO_CD=1
+        shift
+        ;;
       -*)
         if [ -f "$1" ]; then
           FILES+=("$1")