id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason
1339663518,I_kwDOBm6k_c5P2aSe,1784,"Include ""entrypoint"" option on `--load-extension`?",15178711,closed,0,,,2,2022-08-16T00:22:57Z,2022-08-23T18:34:31Z,2022-08-23T18:34:31Z,CONTRIBUTOR,,"## Problem 

SQLite extensions have the option to define multiple ""entrypoints"" in each loadable extension. For example, the upcoming version of `sqlite-lines` will have 2 entrypoints: the default `sqlite3_lines_init` (which SQLite will automatically guess for) and `sqlite3_lines_noread_init`. The `sqlite3_lines_noread_init` version omits functions that read from the filesystem, which is necessary for security purposes when running untrusted SQL (which Datasette does).

(Similar multiple entrypoints will also be added for sqlite-http).



The `--load-extension` flag, however, doesn't give the option to specify a different entrypoint, so the default one is always used. 

## Proposal

I want there to be a new command line option of the `--load-extension` flag to specify a custom entrypoint like so:
```
datasette my.db \
  --load-extension ./lines0 sqlite3_lines0_noread_init
```

Then, under the hood, this line of code:

https://github.com/simonw/datasette/blob/7af67b54b7d9bca43e948510fc62f6db2b748fa8/datasette/app.py#L562

Would look something like this:

```python
 conn.execute(""SELECT load_extension(?, ?)"", [extension, entrypoint]) 
```

One potential problem: For backward compatibility, I'm not sure if Click allows cli flags to have variable number of options (""arity""). So I guess it could also use a `:` delimiter like `--static`:

```
datasette my.db \
  --load-extension ./lines0:sqlite3_lines0_noread_init
```

Or maybe even a new flag name?

```
datasette my.db \
  --load-extension-entrypoint ./lines0 sqlite3_lines0_noread_init
```


Personally I prefer the `:` option... and maybe even `--load-extension` -> `--load`? Definitely out of scope for this issue tho

```
datasette my.db \
  --load./lines0:sqlite3_lines0_noread_init
```",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1784/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
1340900019,I_kwDOBm6k_c5P7IKz,1785,Can't use cog menu to facet by first column in a view,9599,open,0,,,0,2022-08-16T21:27:23Z,2022-08-16T21:27:23Z,,OWNER,,"https://latest.datasette.io/fixtures/paginated_view

<img width=""701"" alt=""image"" src=""https://user-images.githubusercontent.com/9599/184988225-42f6218c-ea91-483d-af6d-52d1d1eff97b.png"">

Compare with:

<img width=""701"" alt=""image"" src=""https://user-images.githubusercontent.com/9599/184988263-3a9351d2-3db0-44d7-aa40-05ccd8dee870.png"">
",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1785/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,