id,node_id,number,state,locked,title,user,body,created_at,updated_at,closed_at,merged_at,merge_commit_sha,assignee,milestone,draft,head,base,author_association,repo,url,merged_by,auto_merge
575187457,MDExOlB1bGxSZXF1ZXN0NTc1MTg3NDU3,1229,closed,0,ensure immutable databses when starting in configuration directory mode with,295329,"fixes #1224 

This PR ensures all databases found in a configuration directory that match the files in `inspect-data.json` will be set to `immutable` as outlined in https://docs.datasette.io/en/latest/settings.html#configuration-directory-mode

specifically on building the `datasette` instance it checks:
- if `immutables` is an empty tuple - as passed by the cli code
- if `immutables` is the default function value `None` - when it's not explicitly set

And correctly builds the immutable database list from the `inspect-data[file]` keys.

Note for this to work the `inspect-data.json` file must contain `file` paths which are relative to the configuration directory otherwise the file paths won't match and the dbs won't be set to immutable. 

I couldn't find an easy way to test this due to the way `make_app_client` works, happy to take directions on adding a test for this. 

I've updated the relevant docs as well, i.e. use the `inspect` cli cmd from the config directory path to create the relevant file
```
cd $config_dir
datasette inspect *.db --inspect-file=inspect-data.json
```
https://docs.datasette.io/en/latest/performance.html#using-datasette-inspect",2021-02-17T20:18:26Z,2022-04-22T13:16:36Z,2021-03-29T00:17:32Z,2021-03-29T00:17:31Z,f92d823766872a6fd7e76c5249a6b2de1ab0f447,,,0,a095248ad18c9c5272dbd52f4c97ea8a36cf91f3,8e18c7943181f228ce5ebcea48deb59ce50bee1f,CONTRIBUTOR,107914493,https://github.com/simonw/datasette/pull/1229,,