### Bug Description If for some part `source: src/` is declared and the pull step already ran and I rename `src/foo` to `src/bar`, the pull step is not retriggered. This can cause at best, a missing file in the final snap, and at worst later steps to fail for no obvious reason. ### To Reproduce Create a snap with a part using `plugin: dump` and `source: src/`, with at least one file in `src/`. Run at least `snapcraft pull`. Rename that file, and rerun the build. ### Environment Ubuntu 23.10, building with snapcraft latest/edge with `--use-lxd`. ### snapcraft.yaml ```shell name: my-snap-name # you probably want to 'snapcraft register <name>' base: core24 # the base snap is the execution environment for this snap version: '0.1' # just for humans, typically '1.2+git' or '1.3.2' summary: Single-line elevator pitch for your amazing snap # 79 char long summary description: | This is my-snap's description. You have a paragraph or two to tell the most important story about your snap. Keep it under 100 words though, we live in tweetspace and your description wants to look good in the snap store. grade: devel # must be 'stable' to release into candidate/stable channels confinement: devmode # use 'strict' once you have the right plugs and slots parts: my-part: # See 'snapcraft plugins' plugin: dump source: src/ override-stage: | craftctl default [ -e "${CRAFT_STAGE}/foo" ] || exit 1 ``` ### Relevant log output ```shell First build: dilyn@Ares:~/test -> snapcraft Starting snapcraft, version 8.3.2.post51+git22ba3ae03 Logging execution to '/home/dilyn/.local/state/snapcraft/log/snapcraft-20240818-191843.140066.log' Launching managed ubuntu 24.04 instance... Creating instance from base instance Starting instance Starting snapcraft, version 8.3.2.post51+git22ba3ae03 Logging execution to '/tmp/snapcraft.log' Initialising lifecycle Installing build-packages Installing build-snaps Pulling my-part Building my-part :: + cp --archive --link --no-dereference . /root/parts/my-part/install Staging my-part :: + craftctl default :: + '[' -e /root/stage/foo ']' Priming my-part Packing... Reading snap metadata... Running linters... Running linter: classic Running linter: library Creating snap package... Packed my-snap-name_0.1_amd64.snap Second build, after mv src/foo src/bar: dilyn@Ares:~/test -> snapcraft Starting snapcraft, version 8.3.2.post51+git22ba3ae03 Logging execution to '/home/dilyn/.local/state/snapcraft/log/snapcraft-20240818-192056.040803.log' Launching managed ubuntu 24.04 instance... Starting instance Starting snapcraft, version 8.3.2.post51+git22ba3ae03 Logging execution to '/tmp/snapcraft.log' Initialising lifecycle Installing build-packages Installing build-snaps Skipping pull for my-part (already ran) Skipping build for my-part (already ran) Skipping stage for my-part (already ran) Skipping prime for my-part (already ran) Packing... Reading snap metadata... Running linters... Running linter: classic Running linter: library Creating snap package... Packed my-snap-name_0.1_amd64.snap ``` ### Additional context This is a hard problem to solve :)