"--cache-dir" flag is ignored when specifying "--resolver=backtracking"

[kikones34]

When using the backtracking resolver, the custom cache dir flag appears to be ignored.

Environment Versions

1. Ubuntu 22.04
2. Python version: 3.11.1
3. pip version: 22.3.1
4. pip-tools version: 6.12.1

Steps to replicate

Execute the command pip-compile -v --cache-dir /tmp/pip-cache --resolver=backtracking --upgrade requirements/requirements.in

Expected result

The cache found in /tmp/pip-cache is used.

Actual result

The default cache folder in ~/.cache/pip-tools is used. No files are generated in /tmp/pip-cache.
Note that without the --resolver=backtracking flag, the cache is properly generated and read from the custom path.

[q0w]

New resolver uses the pip cache so you can override cache-dir by using pip-args

--pip-args "--cache-dir=/tmp/pip-cache"

[kikones34]

New resolver uses the pip cache so you can override cache-dir by using pip-args

--pip-args "--cache-dir=/tmp/pip-cache"

That worked, thank you! I suggest maybe showing a warning if you try to use --cache-dir together with the --resolver=backtracking flag, as it's quite confusing that it gets silently ignored.

[atugushev]

Or we can pass --cache-dir (if presented) to --pip-args with —resolver=backtracking.