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lib.FcWrapper: Add a delegating file context wrapper

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Add a file context that sits in front of another one and delegates every
primitive call to it.

The wrapper adopts the identity of the wrapped context: uri, root, chroot
flag, and the chroot path composition are the wrapped context's, so a path
composed by the wrapper composes identically in the wrapped context. Every
primitive is forwarded to the wrapped context's primitives, which receive
the already-composed path; open() and close() are forwarded to the wrapped
context's public methods, so the open count is kept in one place.

The point is to give derived contexts a stable base: a caching context, or
any other filter, overrides the primitives it cares about and inherits the
rest, instead of re-deriving the chroot bookkeeping of every method.

Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v1.1.0
Signed-off-by: Jan Lindemann <jan@janware.com>
This commit is contained in:
Jan Lindemann 2026-10-09 10:48:17 +02:00
commit cda9e210da
Signed by: Jan Lindemann
GPG key ID: 3750640C9E25DD61
1 changed files with 290 additions and 0 deletions
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7
test/unit/python/jw/pkg/lib/FcWrapper/Makefile Normal file
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@ -0,0 +1,7 @@
TOPDIR = ../../../../../../..
include $(TOPDIR)/make/proj.mk
include $(JWBDIR)/make/py-run.mk
all:
test: run