Copied files

Branching off copies everything git ignores from the source into the new worktree: vendor/, generated files, configuration, uploads. That is what makes a fork run without a build in a project this add-on has never seen.

The shipped configurations leave var, typo3temp, .vscode and .idea behind. The first request rebuilds them, and a compiled container carried into a checkout of other code fails on the first service it asks for, with nothing in the message about the directory that was copied. .git, .ddev and the directory the worktrees live in never travel, whatever is written; a recipe that names one of them is refused.

A project changes the answer under copy:

copy:
  except:
    - node_modules       # rebuilt by "npm ci", and the size of a small country
    - .build/var

except keeps the ordinary answer and takes these out of it, on top of the defaults above. A path may lie inside something that does travel: .build/var leaves the caches out of a .build/ that is otherwise copied whole. Paths are read from the root of the checkout and mean that one place, not every directory of that name down the tree.

Written beside profile:, this list stands instead of the shipped one rather than adding to it, so a project that wants var carried after all writes except: [] — or names the ones it does want left behind and leaves var out of them.

A list says the whole thing instead:

copy:
  - .build
  - config
  - fileadmin

Then exactly those travel, whether git ignores them or not, and nothing else does.