[feature] immutable mode for a directory, not just individual sqlite file

[hydrosquall]

Motivation

• I have a directory of sqlite databases

• I'd like to use immutable mode when opening them for better performance docs

• Currently using this flag throws the following error

  IsADirectoryError: [Errno 21] Is a directory: '/name-of-directory'

Proposal

Immutable flag works for both single files and directories

datasette -i /folder-of-sqlite-files

[simonw]

This is a good idea - it matches the way datasette . works for mutable database files already.

[simonw]

This relates to this much larger vision:

• Datasette Library #417

[ar-jan]

This would be helpful.

[rdmurphy]

Ah, yes! Was just trying to do this and had the same issue. +1 to this!