fix: default action path

entrypoint.sh

@@ -1,25 +1,36 @@
 #!/bin/sh -l
 
-sudo chown -R builder $INPUT_PATH
-cd $INPUT_PATH
+# Set path
+WORKPATH=$GITHUB_WORKSPACE
+if [[ -n "$INPUT_PATH" ]]; then
+    WORKPATH=$INPUT_PATH
+fi
 
+# Set path permision
+sudo chown -R builder $WORKPATH
+cd $WORKPATH
+
+# Update checksums
 if [[ $INPUT_UPDPKGSUMS == true ]]; then
     echo "Update checksums on PKGBUILD"
     sudo -u builder updpkgsums
     git diff PKGBUILD
 fi
 
+# Generate .SRCINFO
 if [[ $INPUT_SRCINFO == true ]]; then
     echo "Generate new .SRCINFO based on PKGBUILD"
     sudo -u builder makepkg --printsrcinfo > .SRCINFO
     git diff .SRCINFO
 fi
 
+# Run makepkg
 if [[ -n "$INPUT_FLAGS" ]]; then
     echo "Run makepkg with flags"
     sudo -u builder makepkg $INPUT_FLAGS
 fi
 
+# Validate with namcap
 if [[ $INPUT_NAMCAP == true ]]; then
     echo "Validate PKGBUILD with namcap"
     namcap -i PKGBUILD