[CLI] dask config set and dask config find updates.

[milesgranger]

• Closes CLI to get/set dask config values #9746
  • follow-up to Add dask config set #10921
• Tests added / passed
• Passes pre-commit run --all-files

Example of dask config set new features:

❯ ls ~/.config/dask/
coiled.yaml  labextension.yaml

# default writing to ~/.config/dask/dask.yaml
❯ dask config set foo.bar False
Updated [foo.bar] to [False], config saved to /home/milesg/.config/dask/dask.yaml

# specific file location
❯ dask config set fizz.buzz True --file ~/.config/dask/custom-conf.yaml
Updated [fizz.buzz] to [True], config saved to /home/milesg/.config/dask/custom-conf.yaml

# Locate and update file that contains 'fizz.buzz' key.
❯ dask config set fizz.buzz False
Updated [fizz.buzz] to [False], config saved to /home/milesg/.config/dask/custom-conf.yaml

Example of new dask config find:

❯ ls ~/.config/dask/
coiled.yaml  labextension.yaml

# default saving to ~/.config/dask/dask.yaml
❯ dask config set fizz.buzz True
Updated [fizz.buzz] to [True], config saved to /home/milesg/.config/dask/dask.yaml

# explicit file specification
❯ dask config set fizz.buzz False --file ~/.config/dask/custom-conf.yaml
Updated [fizz.buzz] to [False], config saved to /home/milesg/.config/dask/custom-conf.yaml

# find config files specifying fizz.buzz
❯ dask config find fizz.buzz
Found [fizz.buzz] in the following files:
/home/milesg/.config/dask/custom-conf.yaml  [fizz.buzz=False]
/home/milesg/.config/dask/dask.yaml         [fizz.buzz=True]

# and when no config key is found:
❯ dask config find does.not.exist
Unable to find [does.not.exist] in any of the following paths:
/etc/dask
/home/milesg/mambaforge/envs/dask/etc/dask
/home/milesg/.config/dask

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

     15 files  ±  0       15 suites  ±0   3h 18m 18s ⏱️ -20s
 13 109 tests + 54   12 178 ✅ + 54     931 💤 ±0  0 ❌ ±0 
162 313 runs  +810  145 759 ✅ +808  16 554 💤 +2  0 ❌ ±0 

Results for commit aa7e7dc. ± Comparison against base commit 7845983.

This pull request removes 8 and adds 62 tests. Note that renamed tests count towards both.

dask.tests.test_cli ‑ test_config_set_value[2-False]
dask.tests.test_cli ‑ test_config_set_value[2-True]
dask.tests.test_cli ‑ test_config_set_value[333MiB-False]
dask.tests.test_cli ‑ test_config_set_value[333MiB-True]
dask.tests.test_cli ‑ test_config_set_value[value2-False]
dask.tests.test_cli ‑ test_config_set_value[value2-True]
dask.tests.test_cli ‑ test_config_set_value[value3-False]
dask.tests.test_cli ‑ test_config_set_value[value3-True]

dask.tests.test_cli ‑ test_config_find
dask.tests.test_cli ‑ test_config_set_value[False-None-False-2]
dask.tests.test_cli ‑ test_config_set_value[False-None-False-333MiB]
dask.tests.test_cli ‑ test_config_set_value[False-None-False-None]
dask.tests.test_cli ‑ test_config_set_value[False-None-False-value2]
dask.tests.test_cli ‑ test_config_set_value[False-None-False-value3]
dask.tests.test_cli ‑ test_config_set_value[False-None-True-2]
dask.tests.test_cli ‑ test_config_set_value[False-None-True-333MiB]
dask.tests.test_cli ‑ test_config_set_value[False-None-True-None]
dask.tests.test_cli ‑ test_config_set_value[False-None-True-value2]
…

♻️ This comment has been updated with latest results.

[crusaderky]

Some minor suggestions.

A tweak that I'd like to see, to prevent confusion from the output of dask config find, is to print out the value in the default files embedded in the packages, if any.
This however can be postponed to a follow-up PR.

[mrocklin]

cc @ntabris

[crusaderky]

Thank you!